Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes, 24906-24910 [2017-10978]

Download as PDF 24906 Federal Register / Vol. 82, No. 103 / Wednesday, May 31, 2017 / Proposed Rules Information Collection Clearance Officer, AES–200. (n) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA AD 2016–0150, dated July 25, 2016, for related information. This MCAI may be found in the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2017–0520. (2) For more information about this AD, contact Dan Rodina, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057–3356; telephone: 425–227–2125; fax: 425–227– 1149. (3) For service information identified in this AD, contact Airbus SAS, Airworthiness Office—EAW, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France; telephone: +33 5 61 93 36 96; fax: +33 5 61 93 44 51; email: account.airworth-eas@ airbus.com; Internet: https://www.airbus.com. You may view this service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on May 19, 2017. Victor Wicklund, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2017–10979 Filed 5–30–17; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2017–0516; Directorate Identifier 2016–NM–125–AD] RIN 2120–AA64 Airworthiness Directives; ATR—GIE ´ Avions de Transport Regional Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to supersede Airworthiness Directive (AD) 2015–23– 12, for all ATR—GIE Avions de ´ Transport Regional Model ATR42 and ATR72 airplanes. AD 2015–23–12 currently requires identifying the serial number and part number of the main landing gear (MLG) rear hinge pins, and replacing pins or the MLG if necessary. Since we issued AD 2015–23–12, we have received a new report of a certain cracked MLG hinge pin on a Model ATR42 airplane. We have determined that certain additional MLG hinge pins nlaroche on DSK30NT082PROD with PROPOSALS SUMMARY: VerDate Sep<11>2014 14:38 May 30, 2017 Jkt 241001 must be replaced, and certain compliance times must be reduced. This proposed AD would require identifying the serial number and part number of the MLG rear hinge pins, and replacing pins if necessary. We are proposing this AD to address the unsafe condition on these products. DATES: We must receive comments on this proposed AD by July 17, 2017. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact ATR—GIE Avions ´ ´ de Transport Regional, 1, Allee Pierre Nadot, 31712 Blagnac Cedex, France; telephone +33 (0) 5 62 21 62 21; fax +33 (0) 5 62 21 67 18; email continued.airworthiness@atr.fr; Internet https://www.aerochain.com. You may view this referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2017– 0516; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aerospace Engineer, International Branch, ANM– 116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057–3356; telephone 425–227– 1112; fax 425–227–1149. PO 00000 Frm 00025 Fmt 4702 Sfmt 4702 SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2017–0516; Directorate Identifier 2016–NM–125–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion On November 12, 2015, we issued AD 2015–23–12, Amendment 39–18329 (80 FR 73096, November 24, 2015) (‘‘AD 2015–23–12’’), for all ATR—GIE Avions ´ de Transport Regional Model ATR42 and ATR72 airplanes. AD 2015–23–12 was prompted by new occurrences of certain cracked MLG rear hinge pins. AD 2015–23–12 requires identifying the serial number and part number of the MLG rear hinge pins, and replacing pins or the MLG if necessary. We issued AD 2015–23–12 to detect and correct cracked rear hinge pins, which could lead to MLG structural failure, possibly resulting in collapse of the MLG and consequent injury to the occupants of the airplane. Since we issued AD 2015–23–12, we have received a new report of a cracked MLG hinge pin having P/N D62055 on a Model ATR42 airplane. We have determined that certain additional MLG hinge pins must be replaced, and certain compliance times must be reduced. The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union, has issued EASA Airworthiness Directive 2016–0135, dated July 8, 2016 (referred to after this as the Mandatory Continuing Airworthiness Information, or ‘‘the MCAI’’), to correct an unsafe condition for all ATR—GIE Avions de ´ Transport Regional Model ATR42 and ATR72 airplanes. The MCAI states: Prompted by cases of rupture of main landing gear (MLG) rear hinge pin part number (P/N) D61000 encountered in service ´ ´ in 1994 and 1996, DGAC [Direction Generale de l’Aviation Civile] France issued AD 96– 131–064 (B) for ATR42 aeroplanes and AD 96–096–029 (B) for ATR72 aeroplanes to E:\FR\FM\31MYP1.SGM 31MYP1 Federal Register / Vol. 82, No. 103 / Wednesday, May 31, 2017 / Proposed Rules require inspection and, depending on findings, corrective action. Since those [French] ADs were issued, new occurrences of cracked rear hinge pin P/N [part number] D61000 were reported on ATR72 MLG. The result of subsequent investigation revealed that the affected pins were subjected to a non-detected thermal abuse done in production during grinding process. Analysis also showed that other MLG pin P/N’s could be affected by the same production issue. This condition, if not detected and corrected, could lead to structural failure and consequent collapse of the MLG, possibly resulting in damage to the aeroplane and injury to the occupants. To address this potential unsafe condition, EASA issued AD 2014–0074 [which corresponds to FAA AD 2015–23–12] to require inspection and, depending on findings, replacement of affected pins. After EASA AD 2014–0074 was issued, a new occurrence was reported of a cracked MLG hinge pin P/N D62055 installed on the MLG Side Brace of an ATR42 aeroplane. This new occurrence was also identified as related to a non-detected thermal abuse done in production during grinding process. Prompted by this new occurrence, Messier Bugatti Dowty (MBD) updated the list of MLG hinge pins affected by this unsafe condition by adding serial numbers (S/N), which were previously not considered by EASA AD 2014–0074. In addition, it was determined that the compliance time for replacement of pins with P/N D62055 must be reduced. The six affected MBD Service Bulletins (SB) were revised accordingly, and six new ones were also published to address this issue. For the reasons described above, this [EASA] AD retains the requirements of EASA AD 2014–0074, which is superseded, but addresses an expanded MLG hinge pin population with appropriate compliance time(s). nlaroche on DSK30NT082PROD with PROPOSALS You may examine the MCAI in the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2017– 0516. Related Service Information Under 1 CFR Part 51 Messier-Bugatti-Dowty has issued the following service information, which describes procedures for inspecting and replacing the MLG hinge pin. These documents are distinct since they apply to different airplane models and different MLG hinge pin part numbers. • Service Bulletin 631–32–213, Revision 2, dated March 15, 2016. • Service Bulletin 631–32–214, Revision 1, dated March 15, 2016. • Service Bulletin 631–32–215, Revision 1, dated March 15, 2016. • Service Bulletin 631–32–216, Revision 3, dated March 15, 2016. • Service Bulletin 631–32–219, Revision 1, dated March 15, 2016. • Service Bulletin 631–32–220, Revision 1, dated March 15, 2016. VerDate Sep<11>2014 14:38 May 30, 2017 Jkt 241001 • Service Bulletin 631–32–224, dated March 15, 2016. • Service Bulletin 631–32–231, dated March 15, 2016. • Service Bulletin 631–32–232, Revision 1, dated March 15, 2016. • Service Bulletin 631–32–233, dated March 15, 2016. • Service Bulletin 631–32–234, dated March 15, 2016. • Service Bulletin 631–32–235, dated March 15, 2016. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA’s Determination and Requirements of This Proposed AD This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with the State of Design Authority, we have been notified of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all pertinent information and determined an unsafe condition exists and is likely to exist or develop on other products of the same type designs. Differences Between This Proposed AD and the MCAI or Service Information In MCAI table 1 and table 2, the MCAI specifies the compliance time terminology, ‘‘whichever occurs later,’’ between compliance time A and B. However, this proposed AD specifies the phrase, ‘‘whichever occurs first,’’ instead of ‘‘whichever occurs later.’’ This difference has been coordinated with EASA and ATR—GIE Avions de ´ Transport Regional. Costs of Compliance We estimate that this proposed AD affects 63 airplanes of U.S. registry. The actions required by AD 2015–23– 12, and retained in this proposed AD take about 8 work-hours per product, at an average labor rate of $85 per workhour. Required parts will cost about $16,000 per product. Based on these figures, the estimated cost of the actions that are required by AD 2015–23–12 is $16,680 per product. We also estimate that it would take about 8 work-hours per product to comply with the basic requirements of this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost about $16,000 per product. Based on these figures, we estimate the cost of this proposed AD on PO 00000 Frm 00026 Fmt 4702 Sfmt 4702 24907 U.S. operators to be $1,050,840, or $16,680 per product. According to the manufacturer, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage for affected individuals. As a result, we have included all costs in our cost estimate. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ‘‘Subtitle VII: Aviation Programs,’’ describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in ‘‘Subtitle VII, Part A, Subpart III, Section 44701: General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 3. Will not affect intrastate aviation in Alaska; and 4. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, E:\FR\FM\31MYP1.SGM 31MYP1 24908 Federal Register / Vol. 82, No. 103 / Wednesday, May 31, 2017 / Proposed Rules the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2015–23–12, Amendment 39–18329 (80 FR 73096, November 24, 2015), and adding the following new AD: ■ ´ ATR–GIE Avions de Transport Regional: Docket No. FAA–2017–0516; Directorate Identifier 2016–NM–125–AD. (a) Comments Due Date We must receive comments by July 17, 2017. (b) Affected ADs This AD replaces AD 2015–23–12, Amendment 39–18329 (80 FR 73096, November 24, 2015) (‘‘AD 2015–23–12’’). (c) Applicability This AD applies to ATR–GIE Avions de ´ Transport Regional Model ATR42–200, –300, –320, and –500 airplanes; and ATR72–101, –201, –102, –202, –211, –212, and –212A airplanes; certificated in any category; all certified models; all manufacturer serial numbers. (d) Subject Air Transport Association (ATA) of America Code 32, Landing Gear. (e) Reason This AD was prompted by a new occurrence of a cracked main landing gear (MLG) rear hinge pin. We are issuing this AD to detect and correct cracked rear hinge pins, which could lead to MLG structural failure, possibly resulting in collapse of the MLG and consequent injury to the occupants of the airplane. nlaroche on DSK30NT082PROD with PROPOSALS (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Retained Hinge Pin Identification and Replacement for Model ATR72 Airplanes, With Terminating Action This paragraph restates the requirements of paragraph (g) of AD 2015–23–12, with terminating action. For Model ATR72 airplanes: Within 12 months after December 29, 2015 (the effective date of AD 2015–23– 12), inspect for the serial number of the lefthand (LH) and right-hand (RH) MLG rear hinge pins having part number (P/N) D61000. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG rear hinge pins can be conclusively determined from that review. If a rear hinge pin having P/N D61000 has a serial number listed in Messier-Bugatti-Dowty Service VerDate Sep<11>2014 14:38 May 30, 2017 Jkt 241001 Bulletin 631–32–213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631–32–216, Revision 1, dated December 17, 2013; as applicable: Within 12 months after December 29, 2015, replace the pin with a serviceable part as identified in paragraph (h) of this AD, in accordance with the Accomplishment Instructions of MessierBugatti-Dowty Service Bulletin 631–32–213, dated December 16, 2013; or Messier-BugattiDowty Service Bulletin 631–32–216, Revision 1, dated December 17, 2013; as applicable. Accomplishment of the actions required by paragraph (l) of this AD terminates the inspection required by this paragraph. Accomplishing the actions required by paragraph (m) or (o) of this AD terminates the actions required by this paragraph. (h) Retained Definition of Serviceable Hinge Pin for Model ATR72 Airplanes for Paragraph (g) of this AD, With No Changes This paragraph restates the definition in paragraph (h) of AD 2015–23–12, with no changes. For Model ATR72 airplanes: For purposes of paragraph (g) of this AD, a serviceable MLG rear hinge pin is a pin that is specified in paragraph (h)(1) or (h)(2) of this AD. (1) A hinge pin that is not identified in Messier-Bugatti-Dowty Service Bulletin 631– 32–213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631– 32–216, Revision 1, dated December 17, 2013; as applicable. (2) A hinge pin that has been inspected and reconditioned, in accordance with the Accomplishment Instructions of MessierBugatti-Dowty Service Bulletin 631–32–213, dated December 16, 2013; or Messier-BugattiDowty Service Bulletin 631–32–216, Revision 1, dated December 17, 2013; as applicable. (i) Retained MLG Pin Identification and Replacement for Model ATR72 Airplanes, With Terminating Action This paragraph restates the requirements of paragraph (i) of AD 2015–23–12, with terminating action. For Model ATR72 airplanes: At the earlier of the times specified in paragraphs (i)(1) and (i)(2) of this AD, inspect all LH and RH MLG pins for a part number and serial number listed in MessierBugatti-Dowty Service Bulletin 631–32–214, dated January 13, 2014; or Messier-BugattiDowty Service Bulletin 631–32–219, dated March 3, 2014; as applicable. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number and serial number of the LH and RH MLG pin can be conclusively determined from that review. If any affected MLG pin is found: At the earlier of the compliance times specified in paragraphs (i)(1) and (i)(2) of this AD, replace the MLG with a serviceable MLG as identified in paragraph (j) of this AD, using a method approved by the Manager, International Branch, ANM–116, Transport Airplane Directorate, FAA; or the European Aviation Safety Agency (EASA); or ATR–GIE ´ Avions de Transport Regional’s EASA Design Organization Approval (DOA). Accomplishment of the actions required by paragraph (l) of this AD terminates the PO 00000 Frm 00027 Fmt 4702 Sfmt 4702 inspection for the part number and serial number of the LH and RH MLG rear hinge pins required by this paragraph. Accomplishment of the actions required by paragraph (m) or (o) of this AD terminates the actions required by this paragraph. (1) No later than the next MLG overhaul scheduled after December 29, 2015 (the effective date of AD 2105–23–12). (2) Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since installation of the MLG on an airplane since new or since last overhaul, as applicable. (j) Retained Definition of Serviceable MLG for Model ATR72 Airplanes for Paragraph (i) of this AD, With No Changes This paragraph restates the definition in paragraph (j) of AD 2015–23–12, with no changes. For Model ATR72 airplanes: For purposes of paragraph (i) of this AD, a serviceable MLG is one that incorporates pins specified in paragraph (j)(1) or (j)(2) of this AD. (1) Pins that are not identified in MessierBugatti-Dowty Service Bulletin 631–32–214, dated January 13, 2014; or Messier-BugattiDowty Service Bulletin 631–32–219, dated March 3, 2014; as applicable. (2) Pins that have been inspected and reconditioned in accordance with the Accomplishment Instructions of MessierBugatti-Dowty Service Bulletin 631–32–214, dated January 13, 2014; or Messier-BugattiDowty Service Bulletin 631–32–219, dated March 3, 2014; as applicable. (k) Retained MLG Pin Identification and Replacement for Model ATR42 Airplanes, With Terminating Action This paragraph restates the requirements of paragraph (k) of AD 2015–23–12, with terminating action. Accomplishment of the actions required by paragraph (l) of this AD terminates the actions required by paragraph (k)(1) of this AD. Accomplishment of the actions required by paragraph (m) or (o) of this AD terminates the actions required by paragraph (k)(2) of this AD. (1) For Model ATR42 airplanes: Within the compliance time identified in paragraph (k)(1)(i) or (k)(1)(ii) of this AD, whichever occurs first, inspect for any LH and RH MLG pins having a part number and serial number listed in Messier-Bugatti-Dowty Service Bulletin 631–32–215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631–32–220, dated March 3, 2014; as applicable. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG pin can be conclusively determined from that review. (i) No later than the next MLG overhaul scheduled after December 29, 2015 (the effective date of AD 2015–23–12). (ii) Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since installation of the MLG on an airplane since new or since last overhaul, as applicable. (2) If the MLG pin having a part number and serial number listed in Messier-BugattiDowty Service Bulletin 631–32–215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631–32–220, dated March 3, 2014; as applicable; is found to be installed E:\FR\FM\31MYP1.SGM 31MYP1 Federal Register / Vol. 82, No. 103 / Wednesday, May 31, 2017 / Proposed Rules during the identification required by paragraph (k)(1) of this AD, within the compliance time identified in paragraph (k)(1) of this AD, replace the MLG with a serviceable MLG, using a method approved by the Manager, International Branch, ANM– 116, Transport Airplane Directorate, FAA; or the EASA; or ATR–GIE Avions de Transport ´ Regional’s EASA DOA. For the purposes of this paragraph, a serviceable MLG is a part that has pins identified in paragraph (k)(2)(i) or (k)(2)(ii) of this AD. (i) Pins that are not listed in MessierBugatti-Dowty Service Bulletin 631–32–215, dated January 13, 2014; or Messier-Bugatti- Dowty Service Bulletin 631–32–220, dated March 3, 2014; as applicable. (ii) Pins that have been inspected and reconditioned, in accordance with the Accomplishment Instructions of MessierBugatti-Dowty Service Bulletin 631–32–215, dated January 13, 2014; or Messier-BugattiDowty Service Bulletin 631–32–220, dated March 3, 2014; as applicable. (l) New Requirement of This AD: Hinge Pin Identification Within the applicable compliance time specified in, and in accordance with the Accomplishment Instructions of, the applicable Messier-Bugatti-Dowty Service 24909 Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, identify the serial number (S/N) of the LH and RH MLG hinge pins. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG hinge pins can be conclusively determined from that review. Accomplishment of the actions required by this paragraph terminates the inspections required by paragraphs (g), (i), and (k)(1) of this AD. FIGURE 1 TO PARAGRAPHS (l) THROUGH (p) OF THIS AD—MODEL ATR72 AIRPLANES MLG Hinge part Nos. Applicable Messier-Bugatti-Dowty Service Bulletins Compliance time D60955, D60968, D60999, D61032, D61061. Messier-Bugatti-Dowty Service Bulletin 631–32–214, Revision 1, dated March 15, 2016 Messier-Bugatti-Dowty Service Bulletin 631–32–219, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631–32–233, dated March 15, 2016 D61000 ................................. Messier-Bugatti-Dowty Service Bulletin 631–32–213, Revision 2, dated March 15, 2016 Messier-Bugatti-Dowty Service Bulletin 631–32–216, Revision 3, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631–32–232, Revision 1, dated March 15, 2016 A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. Within 12 months after the effective date of this AD. FIGURE 2 TO PARAGRAPHS (l) THROUGH (p) OF THIS AD—MODEL ATR42 AIRPLANES Airplane model(s) Applicable Messier-Bugatti-Dowty Service Bulletins Compliance time D62054, D63823, D63825. All ............................... Messier-Bugatti-Dowty Service Bulletin 631– 32–215, Revision 1, dated March 15, 2016 Messier-Bugatti-Dowty Service Bulletin 631– 32–220, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631– 32–235, dated March 15, 2016 D56800, D56800–1, D56809, D56841, D57261, D57401, D57407, D58807, D62079. ATR42–300 ................ Messier-Bugatti-Dowty Service Bulletin 631– 32–215, Revision 1, dated March 15, 2016 Messier-Bugatti-Dowty Service Bulletin 631– 32–220, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631– 32–235, dated March 15, 2016 D62055 ........................ All ............................... Messier-Bugatti-Dowty Service Bulletin 631– 32–224, Messier-Bugatti-Dowty Service Bulletin 631– 32–231, or Messier-Bugatti-Dowty Service Bulletin 631– 32–234 A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. Within 24 months after the effective date of this AD. MLG Hinge part Nos. nlaroche on DSK30NT082PROD with PROPOSALS (m) New MLG Hinge Pin Replacement If, during the identification required by paragraph (l) of this AD, an MLG hinge pin with a serial number listed in the applicable Messier-Bugatti-Dowty Service Bulletin is found to be installed: Within the compliance time specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to airplane model and MLG hinge VerDate Sep<11>2014 14:38 May 30, 2017 Jkt 241001 pin part number, replace each affected MLG hinge pin with a serviceable MLG hinge pin. The replacement must be done in accordance with the Accomplishment Instructions of the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, except as required by paragraph (o) of this AD. Accomplishment of PO 00000 Frm 00028 Fmt 4702 Sfmt 4702 the actions required by this paragraph terminates the actions required by paragraphs (g) and (i) of this AD. Accomplishment of the actions required by this paragraph terminates the replacement required by paragraph (k)(2) of this AD. (n) New Definition of Serviceable Hinge Pins for Paragraph (m) of This AD For the purpose of paragraph (m) of this AD, a serviceable MLG hinge pin is a pin that E:\FR\FM\31MYP1.SGM 31MYP1 24910 Federal Register / Vol. 82, No. 103 / Wednesday, May 31, 2017 / Proposed Rules is specified in paragraph (n)(1) or (n)(2) of this AD. (1) A hinge pin that does not belong to the identified batch as listed in the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number. (2) A hinge pin that can be identified, through the MLG maintenance records, as having been inspected and reconditioned in accordance with the Accomplishment Instructions of the applicable MessierBugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number. (o) New MLG Hinge Pin Replacement Procedures If, during accomplishment of the MLG hinge pin replacement required by paragraph (m) of this AD, the applicable MessierBugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD does not specify the MLG hinge pin replacement procedure, do the MLG hinge pin replacement using a method approved by the Manager, International Branch, ANM–116, Transport Airplane Directorate, FAA; or the EASA; or ATR–GIE ´ Avions de Transport Regional’s EASA DOA. Do the MLG hinge pin replacement at the applicable compliance time specified in paragraph (m) of this AD. Accomplishment of the actions required by this paragraph terminates the hinge pin replacement required by paragraphs (g), (i), and (k)(2) of this AD. nlaroche on DSK30NT082PROD with PROPOSALS (p) New Parts Installation Limitation As of the effective date of this AD, no person may install on any airplane an MLG hinge pin having a part number identified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, and having a serial number defined in the applicable Messier-BugattiDowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, unless the part can be conclusively identified, through the MLG maintenance records, as having been inspected and reconditioned in accordance with the Accomplishment Instructions of the applicable Messier-Bugatti-Dowty Service Bulletin. (q) Credit for Previous Actions (1) This paragraph restates the credit provided in paragraph (l) of AD 2015–23–12, with no changes. This paragraph provides credit for the actions required by paragraph (g) of this AD, if those actions were performed before December 29, 2015 (the effective date of AD 2105–23–12), using Messier-Bugatti-Dowty Service Bulletin 631– 32–216, dated October 30, 2013, which is not incorporated by reference in this AD. (2) This paragraph provides credit for the actions required by paragraphs (l) and (m) of this AD, if those actions were done before the VerDate Sep<11>2014 14:38 May 30, 2017 Jkt 241001 effective date of this AD using the applicable service information specified in paragraph (q)(2)(i) through (q)(2)(x) of this AD. (i) Messier-Bugatti-Dowty Service Bulletin 631–32–213, December 16, 2013, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (ii) Messier-Bugatti-Dowty Service Bulletin 631–32–213, Revision 1, dated December 8, 2014, which is not incorporated by reference in this AD. (iii) Messier-Bugatti-Dowty Service Bulletin 631–32–214, dated January 13, 2014, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (iv) Messier-Bugatti-Dowty Service Bulletin 631–32–215, dated January 13, 2014, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (v) Messier-Bugatti-Dowty Service Bulletin 631–32–216, dated October 30, 2013, which is not incorporated by reference in this AD. (vi) Messier-Bugatti-Dowty Service Bulletin 631–32–216, Revision 1, dated December 17, 201, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (vii) Messier-Bugatti-Dowty Service Bulletin 631–32–216, Revision 2, dated December 8, 2014, which is not incorporated by reference in this AD. (viii) Messier-Bugatti-Dowty Service Bulletin 631–32–219, dated March 3, 2014, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (ix) Messier-Bugatti-Dowty Service Bulletin 631–32–220, dated March 3, 2014, which was incorporated by reference on December 29, 2015 (80 FR 73096, November 24, 2015). (x) Messier-Bugatti-Dowty Service Bulletin 631–32–232, dated December 8, 2014, which is not incorporated by reference in this AD. (r) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM–116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the International Branch, send it to the attention of the person identified in paragraph (s)(2) of this AD. Information may be emailed to: 9-ANM-116AMOC-REQUESTS@faa.gov. (i) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (ii) AMOCs approved previously for AD 2015–23–12 are approved as AMOCs for the corresponding provisions of this AD. (2) Contacting the Manufacturer: As of the effective date of this AD, for any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by PO 00000 Frm 00029 Fmt 4702 Sfmt 4702 the Manager, International Branch, ANM– 116, Transport Airplane Directorate, FAA; or the EASA; or ATR–GIE Avions de Transport ´ Regional’s EASA DOA. If approved by the DOA, the approval must include the DOAauthorized signature. (s) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA Airworthiness Directive 2016–0135, dated July 8, 2016, for related information. This MCAI may be found in the AD docket on the Internet at https://www.regulations.gov by searching for and locating Docket No. FAA– 2017–0516. (2) For more information about this AD, contact Shahram Daneshmandi, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057–3356; telephone 425–227–1112; fax 425–227–1149. (3) For service information identified in this AD, contact ATR–GIE Avions de ´ ´ Transport Regional, 1, Allee Pierre Nadot, 31712 Blagnac Cedex, France; telephone +33 (0) 5 62 21 62 21; fax +33 (0) 5 62 21 67 18; email continued.airworthiness@atr.fr; Internet https://www.aerochain.com. You may view this service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on May 19, 2017. Victor Wicklund, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2017–10978 Filed 5–30–17; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2017–0502; Directorate Identifier 2016–NM–120–AD] RIN 2120–AA64 Airworthiness Directives; Dassault Aviation Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 7X airplanes. This proposed AD was prompted by a discovery of noncompliant rivets in the flight deck upper skin. This proposed AD would require replacement of noncompliant rivets. We are proposing this AD to address the unsafe condition on these products. SUMMARY: E:\FR\FM\31MYP1.SGM 31MYP1

Agencies

[Federal Register Volume 82, Number 103 (Wednesday, May 31, 2017)]
[Proposed Rules]
[Pages 24906-24910]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-10978]

-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0516; Directorate Identifier 2016-NM-125-AD]
RIN 2120-AA64

Airworthiness Directives; ATR--GIE Avions de Transport
R[eacute]gional Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to supersede Airworthiness Directive (AD) 2015-23-
12, for all ATR--GIE Avions de Transport R[eacute]gional Model ATR42
and ATR72 airplanes. AD 2015-23-12 currently requires identifying the
serial number and part number of the main landing gear (MLG) rear hinge
pins, and replacing pins or the MLG if necessary. Since we issued AD
2015-23-12, we have received a new report of a certain cracked MLG
hinge pin on a Model ATR42 airplane. We have determined that certain
additional MLG hinge pins must be replaced, and certain compliance
times must be reduced. This proposed AD would require identifying the
serial number and part number of the MLG rear hinge pins, and replacing
pins if necessary. We are proposing this AD to address the unsafe
condition on these products.

DATES: We must receive comments on this proposed AD by July 17, 2017.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
For service information identified in this NPRM, contact ATR--GIE
Avions de Transport R[eacute]gional, 1, All[eacute]e Pierre Nadot,
31712 Blagnac Cedex, France; telephone +33 (0) 5 62 21 62 21; fax +33
(0) 5 62 21 67 18; email continued.airworthiness@atr.fr; Internet
https://www.aerochain.com. You may view this referenced service
information at the FAA, Transport Airplane Directorate, 1601 Lind
Avenue SW., Renton, WA. For information on the availability of this
material at the FAA, call 425-227-1221.

Examining the AD Docket

You may examine the AD docket on the Internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2017-
0516; or in person at the Docket Management Facility between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains this proposed AD, the regulatory evaluation, any comments
received, and other information. The street address for the Docket
Operations office (telephone 800-647-5527) is in the ADDRESSES section.
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aerospace
Engineer, International Branch, ANM-116, Transport Airplane
Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057-3356;
telephone 425-227-1112; fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2017-0516;
Directorate Identifier 2016-NM-125-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.
We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.

Discussion

On November 12, 2015, we issued AD 2015-23-12, Amendment 39-18329
(80 FR 73096, November 24, 2015) (``AD 2015-23-12''), for all ATR--GIE
Avions de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. AD
2015-23-12 was prompted by new occurrences of certain cracked MLG rear
hinge pins. AD 2015-23-12 requires identifying the serial number and
part number of the MLG rear hinge pins, and replacing pins or the MLG
if necessary. We issued AD 2015-23-12 to detect and correct cracked
rear hinge pins, which could lead to MLG structural failure, possibly
resulting in collapse of the MLG and consequent injury to the occupants
of the airplane.
Since we issued AD 2015-23-12, we have received a new report of a
cracked MLG hinge pin having P/N D62055 on a Model ATR42 airplane. We
have determined that certain additional MLG hinge pins must be
replaced, and certain compliance times must be reduced.
The European Aviation Safety Agency (EASA), which is the Technical
Agent for the Member States of the European Union, has issued EASA
Airworthiness Directive 2016-0135, dated July 8, 2016 (referred to
after this as the Mandatory Continuing Airworthiness Information, or
``the MCAI''), to correct an unsafe condition for all ATR--GIE Avions
de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. The MCAI
states:

Prompted by cases of rupture of main landing gear (MLG) rear
hinge pin part number (P/N) D61000 encountered in service in 1994
and 1996, DGAC [Direction G[eacute]n[eacute]rale de l'Aviation
Civile] France issued AD 96-131-064 (B) for ATR42 aeroplanes and AD
96-096-029 (B) for ATR72 aeroplanes to

[[Page 24907]]

require inspection and, depending on findings, corrective action.
Since those [French] ADs were issued, new occurrences of cracked
rear hinge pin P/N [part number] D61000 were reported on ATR72 MLG.
The result of subsequent investigation revealed that the affected
pins were subjected to a non-detected thermal abuse done in
production during grinding process. Analysis also showed that other
MLG pin P/N's could be affected by the same production issue.
This condition, if not detected and corrected, could lead to
structural failure and consequent collapse of the MLG, possibly
resulting in damage to the aeroplane and injury to the occupants.
To address this potential unsafe condition, EASA issued AD 2014-
0074 [which corresponds to FAA AD 2015-23-12] to require inspection
and, depending on findings, replacement of affected pins.
After EASA AD 2014-0074 was issued, a new occurrence was
reported of a cracked MLG hinge pin P/N D62055 installed on the MLG
Side Brace of an ATR42 aeroplane. This new occurrence was also
identified as related to a non-detected thermal abuse done in
production during grinding process.
Prompted by this new occurrence, Messier Bugatti Dowty (MBD)
updated the list of MLG hinge pins affected by this unsafe condition
by adding serial numbers (S/N), which were previously not considered
by EASA AD 2014-0074. In addition, it was determined that the
compliance time for replacement of pins with P/N D62055 must be
reduced. The six affected MBD Service Bulletins (SB) were revised
accordingly, and six new ones were also published to address this
issue.
For the reasons described above, this [EASA] AD retains the
requirements of EASA AD 2014-0074, which is superseded, but
addresses an expanded MLG hinge pin population with appropriate
compliance time(s).

You may examine the MCAI in the AD docket on the Internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2017-
0516.

Related Service Information Under 1 CFR Part 51

Messier-Bugatti-Dowty has issued the following service information,
which describes procedures for inspecting and replacing the MLG hinge
pin. These documents are distinct since they apply to different
airplane models and different MLG hinge pin part numbers.
Service Bulletin 631-32-213, Revision 2, dated March 15,
2016.
Service Bulletin 631-32-214, Revision 1, dated March 15,
2016.
Service Bulletin 631-32-215, Revision 1, dated March 15,
2016.
Service Bulletin 631-32-216, Revision 3, dated March 15,
2016.
Service Bulletin 631-32-219, Revision 1, dated March 15,
2016.
Service Bulletin 631-32-220, Revision 1, dated March 15,
2016.
Service Bulletin 631-32-224, dated March 15, 2016.
Service Bulletin 631-32-231, dated March 15, 2016.
Service Bulletin 631-32-232, Revision 1, dated March 15,
2016.
Service Bulletin 631-32-233, dated March 15, 2016.
Service Bulletin 631-32-234, dated March 15, 2016.
Service Bulletin 631-32-235, dated March 15, 2016.
This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.

FAA's Determination and Requirements of This Proposed AD

This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type designs.

Differences Between This Proposed AD and the MCAI or Service
Information

In MCAI table 1 and table 2, the MCAI specifies the compliance time
terminology, ``whichever occurs later,'' between compliance time A and
B. However, this proposed AD specifies the phrase, ``whichever occurs
first,'' instead of ``whichever occurs later.'' This difference has
been coordinated with EASA and ATR--GIE Avions de Transport
R[eacute]gional.

Costs of Compliance

We estimate that this proposed AD affects 63 airplanes of U.S.
registry.
The actions required by AD 2015-23-12, and retained in this
proposed AD take about 8 work-hours per product, at an average labor
rate of $85 per work-hour. Required parts will cost about $16,000 per
product. Based on these figures, the estimated cost of the actions that
are required by AD 2015-23-12 is $16,680 per product.
We also estimate that it would take about 8 work-hours per product
to comply with the basic requirements of this proposed AD. The average
labor rate is $85 per work-hour. Required parts would cost about
$16,000 per product. Based on these figures, we estimate the cost of
this proposed AD on U.S. operators to be $1,050,840, or $16,680 per
product.
According to the manufacturer, some of the costs of this proposed
AD may be covered under warranty, thereby reducing the cost impact on
affected individuals. We do not control warranty coverage for affected
individuals. As a result, we have included all costs in our cost
estimate.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.

Regulatory Findings

We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

The Proposed Amendment

Accordingly, under the authority delegated to me by the
Administrator,

[[Page 24908]]

the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]

0
2. The FAA amends Sec. 39.13 by removing Airworthiness Directive (AD)
2015-23-12, Amendment 39-18329 (80 FR 73096, November 24, 2015), and
adding the following new AD:

ATR-GIE Avions de Transport R[eacute]gional: Docket No. FAA-2017-
0516; Directorate Identifier 2016-NM-125-AD.

(a) Comments Due Date

We must receive comments by July 17, 2017.

(b) Affected ADs

This AD replaces AD 2015-23-12, Amendment 39-18329 (80 FR 73096,
November 24, 2015) (``AD 2015-23-12'').

This AD applies to ATR-GIE Avions de Transport R[eacute]gional
Model ATR42-200, -300, -320, and -500 airplanes; and ATR72-101, -
201, -102, -202, -211, -212, and -212A airplanes; certificated in
any category; all certified models; all manufacturer serial numbers.

(d) Subject

Air Transport Association (ATA) of America Code 32, Landing
Gear.

(e) Reason

This AD was prompted by a new occurrence of a cracked main
landing gear (MLG) rear hinge pin. We are issuing this AD to detect
and correct cracked rear hinge pins, which could lead to MLG
structural failure, possibly resulting in collapse of the MLG and
consequent injury to the occupants of the airplane.

(f) Compliance

Comply with this AD within the compliance times specified,
unless already done.

(g) Retained Hinge Pin Identification and Replacement for Model ATR72
Airplanes, With Terminating Action

This paragraph restates the requirements of paragraph (g) of AD
2015-23-12, with terminating action. For Model ATR72 airplanes:
Within 12 months after December 29, 2015 (the effective date of AD
2015-23-12), inspect for the serial number of the left-hand (LH) and
right-hand (RH) MLG rear hinge pins having part number (P/N) D61000.
A review of airplane maintenance records is acceptable in lieu of
this identification if the part number and serial number of the LH
and RH MLG rear hinge pins can be conclusively determined from that
review. If a rear hinge pin having P/N D61000 has a serial number
listed in Messier-Bugatti-Dowty Service Bulletin 631-32-213, dated
December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631-32-
216, Revision 1, dated December 17, 2013; as applicable: Within 12
months after December 29, 2015, replace the pin with a serviceable
part as identified in paragraph (h) of this AD, in accordance with
the Accomplishment Instructions of Messier-Bugatti-Dowty Service
Bulletin 631-32-213, dated December 16, 2013; or Messier-Bugatti-
Dowty Service Bulletin 631-32-216, Revision 1, dated December 17,
2013; as applicable. Accomplishment of the actions required by
paragraph (l) of this AD terminates the inspection required by this
paragraph. Accomplishing the actions required by paragraph (m) or
(o) of this AD terminates the actions required by this paragraph.

(h) Retained Definition of Serviceable Hinge Pin for Model ATR72
Airplanes for Paragraph (g) of this AD, With No Changes

This paragraph restates the definition in paragraph (h) of AD
2015-23-12, with no changes. For Model ATR72 airplanes: For purposes
of paragraph (g) of this AD, a serviceable MLG rear hinge pin is a
pin that is specified in paragraph (h)(1) or (h)(2) of this AD.
(1) A hinge pin that is not identified in Messier-Bugatti-Dowty
Service Bulletin 631-32-213, dated December 16, 2013; or Messier-
Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated
December 17, 2013; as applicable.
(2) A hinge pin that has been inspected and reconditioned, in
accordance with the Accomplishment Instructions of Messier-Bugatti-
Dowty Service Bulletin 631-32-213, dated December 16, 2013; or
Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated
December 17, 2013; as applicable.

(i) Retained MLG Pin Identification and Replacement for Model ATR72
Airplanes, With Terminating Action

This paragraph restates the requirements of paragraph (i) of AD
2015-23-12, with terminating action. For Model ATR72 airplanes: At
the earlier of the times specified in paragraphs (i)(1) and (i)(2)
of this AD, inspect all LH and RH MLG pins for a part number and
serial number listed in Messier-Bugatti-Dowty Service Bulletin 631-
32-214, dated January 13, 2014; or Messier-Bugatti-Dowty Service
Bulletin 631-32-219, dated March 3, 2014; as applicable. A review of
airplane maintenance records is acceptable in lieu of this
inspection if the part number and serial number of the LH and RH MLG
pin can be conclusively determined from that review. If any affected
MLG pin is found: At the earlier of the compliance times specified
in paragraphs (i)(1) and (i)(2) of this AD, replace the MLG with a
serviceable MLG as identified in paragraph (j) of this AD, using a
method approved by the Manager, International Branch, ANM-116,
Transport Airplane Directorate, FAA; or the European Aviation Safety
Agency (EASA); or ATR-GIE Avions de Transport R[eacute]gional's EASA
Design Organization Approval (DOA). Accomplishment of the actions
required by paragraph (l) of this AD terminates the inspection for
the part number and serial number of the LH and RH MLG rear hinge
pins required by this paragraph. Accomplishment of the actions
required by paragraph (m) or (o) of this AD terminates the actions
required by this paragraph.
(1) No later than the next MLG overhaul scheduled after December
29, 2015 (the effective date of AD 2105-23-12).
(2) Within 20,000 flight cycles or 9 years, whichever occurs
first, accumulated since installation of the MLG on an airplane
since new or since last overhaul, as applicable.

(j) Retained Definition of Serviceable MLG for Model ATR72 Airplanes
for Paragraph (i) of this AD, With No Changes

This paragraph restates the definition in paragraph (j) of AD
2015-23-12, with no changes. For Model ATR72 airplanes: For purposes
of paragraph (i) of this AD, a serviceable MLG is one that
incorporates pins specified in paragraph (j)(1) or (j)(2) of this
AD.
(1) Pins that are not identified in Messier-Bugatti-Dowty
Service Bulletin 631-32-214, dated January 13, 2014; or Messier-
Bugatti-Dowty Service Bulletin 631-32-219, dated March 3, 2014; as
applicable.
(2) Pins that have been inspected and reconditioned in
accordance with the Accomplishment Instructions of Messier-Bugatti-
Dowty Service Bulletin 631-32-214, dated January 13, 2014; or
Messier-Bugatti-Dowty Service Bulletin 631-32-219, dated March 3,
2014; as applicable.

(k) Retained MLG Pin Identification and Replacement for Model ATR42
Airplanes, With Terminating Action

This paragraph restates the requirements of paragraph (k) of AD
2015-23-12, with terminating action. Accomplishment of the actions
required by paragraph (l) of this AD terminates the actions required
by paragraph (k)(1) of this AD. Accomplishment of the actions
required by paragraph (m) or (o) of this AD terminates the actions
required by paragraph (k)(2) of this AD.
(1) For Model ATR42 airplanes: Within the compliance time
identified in paragraph (k)(1)(i) or (k)(1)(ii) of this AD,
whichever occurs first, inspect for any LH and RH MLG pins having a
part number and serial number listed in Messier-Bugatti-Dowty
Service Bulletin 631-32-215, dated January 13, 2014; or Messier-
Bugatti-Dowty Service Bulletin 631-32-220, dated March 3, 2014; as
applicable. A review of airplane maintenance records is acceptable
in lieu of this identification if the part number and serial number
of the LH and RH MLG pin can be conclusively determined from that
review.
(i) No later than the next MLG overhaul scheduled after December
29, 2015 (the effective date of AD 2015-23-12).
(ii) Within 20,000 flight cycles or 9 years, whichever occurs
first, accumulated since installation of the MLG on an airplane
since new or since last overhaul, as applicable.
(2) If the MLG pin having a part number and serial number listed
in Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated January
13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-220,
dated March 3, 2014; as applicable; is found to be installed

[[Page 24909]]

during the identification required by paragraph (k)(1) of this AD,
within the compliance time identified in paragraph (k)(1) of this
AD, replace the MLG with a serviceable MLG, using a method approved
by the Manager, International Branch, ANM-116, Transport Airplane
Directorate, FAA; or the EASA; or ATR-GIE Avions de Transport
R[eacute]gional's EASA DOA. For the purposes of this paragraph, a
serviceable MLG is a part that has pins identified in paragraph
(k)(2)(i) or (k)(2)(ii) of this AD.
(i) Pins that are not listed in Messier-Bugatti-Dowty Service
Bulletin 631-32-215, dated January 13, 2014; or Messier-Bugatti-
Dowty Service Bulletin 631-32-220, dated March 3, 2014; as
applicable.
(ii) Pins that have been inspected and reconditioned, in
accordance with the Accomplishment Instructions of Messier-Bugatti-
Dowty Service Bulletin 631-32-215, dated January 13, 2014; or
Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated March 3,
2014; as applicable.

(l) New Requirement of This AD: Hinge Pin Identification

Within the applicable compliance time specified in, and in
accordance with the Accomplishment Instructions of, the applicable
Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to
paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l)
through (p) of this AD, as applicable to the airplane model and MLG
hinge part number, identify the serial number (S/N) of the LH and RH
MLG hinge pins. A review of airplane maintenance records is
acceptable in lieu of this identification if the part number and
serial number of the LH and RH MLG hinge pins can be conclusively
determined from that review. Accomplishment of the actions required
by this paragraph terminates the inspections required by paragraphs
(g), (i), and (k)(1) of this AD.

Figure 1 to Paragraphs (l) Through (p) of This AD--Model ATR72 Airplanes
------------------------------------------------------------------------
Applicable Messier-
MLG Hinge part Nos. Bugatti-Dowty Compliance time
Service Bulletins
------------------------------------------------------------------------
D60955, D60968, D60999, Messier-Bugatti- A or B, whichever
D61032, D61061. Dowty Service occurs first:
Bulletin 631-32- A: Not later than
214, Revision 1, the next scheduled
dated March 15, MLG overhaul after
2016 the effective date
Messier-Bugatti- of this AD.
Dowty Service B: Within 20,000
Bulletin 631-32- flight cycles or 9
219, Revision 1, years, whichever
dated March 15, occurs first,
2016, or. accumulated since
Messier-Bugatti- first installation
Dowty Service of a MLG on an
Bulletin 631-32- airplane since new,
233, dated March or since last
15, 2016. overhaul, as
applicable.
D61000...................... Messier-Bugatti- Within 12 months
Dowty Service after the effective
Bulletin 631-32- date of this AD.
213, Revision 2,
dated March 15,
2016
Messier-Bugatti-
Dowty Service
Bulletin 631-32-
216, Revision 3,
dated March 15,
2016, or.
Messier-Bugatti-
Dowty Service
Bulletin 631-32-
232, Revision 1,
dated March 15,
2016.
------------------------------------------------------------------------

Figure 2 to Paragraphs (l) Through (p) of This AD--Model ATR42 Airplanes
----------------------------------------------------------------------------------------------------------------
Applicable Messier-Bugatti-
MLG Hinge part Nos. Airplane model(s) Dowty Service Bulletins Compliance time
----------------------------------------------------------------------------------------------------------------
D62054, D63823, D63825............ All.................. Messier-Bugatti-Dowty A or B, whichever occurs
Service Bulletin 631-32- first:
215, Revision 1, dated A: Not later than the
March 15, 2016 next scheduled MLG
Messier-Bugatti-Dowty overhaul after the
Service Bulletin 631-32- effective date of this
220, Revision 1, dated AD.
March 15, 2016, or. B: Within 20,000 flight
Messier-Bugatti-Dowty cycles or 9 years,
Service Bulletin 631-32- whichever occurs first,
235, dated March 15, 2016. accumulated since first
installation of a MLG on
an airplane since new,
or since last overhaul,
as applicable.
D56800, D56800-1, D56809, D56841, ATR42-300............ Messier-Bugatti-Dowty A or B, whichever occurs
D57261, D57401, D57407, D58807, Service Bulletin 631-32- first:
D62079. 215, Revision 1, dated A: Not later than the
March 15, 2016 next scheduled MLG
Messier-Bugatti-Dowty overhaul after the
Service Bulletin 631-32- effective date of this
220, Revision 1, dated AD.
March 15, 2016, or. B: Within 20,000 flight
Messier-Bugatti-Dowty cycles or 9 years,
Service Bulletin 631-32- whichever occurs first,
235, dated March 15, 2016. accumulated since first
installation of a MLG on
an airplane since new,
or since last overhaul,
as applicable.
D62055............................ All.................. Messier-Bugatti-Dowty Within 24 months after
Service Bulletin 631-32- the effective date of
224, this AD.
Messier-Bugatti-Dowty
Service Bulletin 631-32-
231, or.
Messier-Bugatti-Dowty
Service Bulletin 631-32-
234.
----------------------------------------------------------------------------------------------------------------

(m) New MLG Hinge Pin Replacement

If, during the identification required by paragraph (l) of this
AD, an MLG hinge pin with a serial number listed in the applicable
Messier-Bugatti-Dowty Service Bulletin is found to be installed:
Within the compliance time specified in figure 1 to paragraphs (l)
through (p) of this AD or figure 2 to paragraphs (l) through (p) of
this AD, as applicable to airplane model and MLG hinge pin part
number, replace each affected MLG hinge pin with a serviceable MLG
hinge pin. The replacement must be done in accordance with the
Accomplishment Instructions of the applicable Messier-Bugatti-Dowty
Service Bulletin specified in figure 1 to paragraphs (l) through (p)
of this AD or figure 2 to paragraphs (l) through (p) of this AD, as
applicable to the airplane model and MLG hinge part number, except
as required by paragraph (o) of this AD. Accomplishment of the
actions required by this paragraph terminates the actions required
by paragraphs (g) and (i) of this AD. Accomplishment of the actions
required by this paragraph terminates the replacement required by
paragraph (k)(2) of this AD.

(n) New Definition of Serviceable Hinge Pins for Paragraph (m) of This
AD

For the purpose of paragraph (m) of this AD, a serviceable MLG
hinge pin is a pin that

[[Page 24910]]

is specified in paragraph (n)(1) or (n)(2) of this AD.
(1) A hinge pin that does not belong to the identified batch as
listed in the applicable Messier-Bugatti-Dowty Service Bulletin
specified in figure 1 to paragraphs (l) through (p) of this AD or
figure 2 to paragraphs (l) through (p) of this AD, as applicable to
the airplane model and MLG hinge part number.
(2) A hinge pin that can be identified, through the MLG
maintenance records, as having been inspected and reconditioned in
accordance with the Accomplishment Instructions of the applicable
Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to
paragraphs (l) through (p) of this AD or figure 2 to paragraphs (l)
through (p) of this AD, as applicable to the airplane model and MLG
hinge part number.

(o) New MLG Hinge Pin Replacement Procedures

If, during accomplishment of the MLG hinge pin replacement
required by paragraph (m) of this AD, the applicable Messier-
Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs
(l) through (p) of this AD or figure 2 to paragraphs (l) through (p)
of this AD does not specify the MLG hinge pin replacement procedure,
do the MLG hinge pin replacement using a method approved by the
Manager, International Branch, ANM-116, Transport Airplane
Directorate, FAA; or the EASA; or ATR-GIE Avions de Transport
R[eacute]gional's EASA DOA. Do the MLG hinge pin replacement at the
applicable compliance time specified in paragraph (m) of this AD.
Accomplishment of the actions required by this paragraph terminates
the hinge pin replacement required by paragraphs (g), (i), and
(k)(2) of this AD.

(p) New Parts Installation Limitation

As of the effective date of this AD, no person may install on
any airplane an MLG hinge pin having a part number identified in
figure 1 to paragraphs (l) through (p) of this AD or figure 2 to
paragraphs (l) through (p) of this AD, and having a serial number
defined in the applicable Messier-Bugatti-Dowty Service Bulletin
specified in figure 1 to paragraphs (l) through (p) of this AD or
figure 2 to paragraphs (l) through (p) of this AD, as applicable to
the airplane model and MLG hinge part number, unless the part can be
conclusively identified, through the MLG maintenance records, as
having been inspected and reconditioned in accordance with the
Accomplishment Instructions of the applicable Messier-Bugatti-Dowty
Service Bulletin.

(q) Credit for Previous Actions

(1) This paragraph restates the credit provided in paragraph (l)
of AD 2015-23-12, with no changes. This paragraph provides credit
for the actions required by paragraph (g) of this AD, if those
actions were performed before December 29, 2015 (the effective date
of AD 2105-23-12), using Messier-Bugatti-Dowty Service Bulletin 631-
32-216, dated October 30, 2013, which is not incorporated by
reference in this AD.
(2) This paragraph provides credit for the actions required by
paragraphs (l) and (m) of this AD, if those actions were done before
the effective date of this AD using the applicable service
information specified in paragraph (q)(2)(i) through (q)(2)(x) of
this AD.
(i) Messier-Bugatti-Dowty Service Bulletin 631-32-213, December
16, 2013, which was incorporated by reference on December 29, 2015
(80 FR 73096, November 24, 2015).
(ii) Messier-Bugatti-Dowty Service Bulletin 631-32-213, Revision
1, dated December 8, 2014, which is not incorporated by reference in
this AD.
(iii) Messier-Bugatti-Dowty Service Bulletin 631-32-214, dated
January 13, 2014, which was incorporated by reference on December
29, 2015 (80 FR 73096, November 24, 2015).
(iv) Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated
January 13, 2014, which was incorporated by reference on December
29, 2015 (80 FR 73096, November 24, 2015).
(v) Messier-Bugatti-Dowty Service Bulletin 631-32-216, dated
October 30, 2013, which is not incorporated by reference in this AD.
(vi) Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision
1, dated December 17, 201, which was incorporated by reference on
December 29, 2015 (80 FR 73096, November 24, 2015).
(vii) Messier-Bugatti-Dowty Service Bulletin 631-32-216,
Revision 2, dated December 8, 2014, which is not incorporated by
reference in this AD.
(viii) Messier-Bugatti-Dowty Service Bulletin 631-32-219, dated
March 3, 2014, which was incorporated by reference on December 29,
2015 (80 FR 73096, November 24, 2015).
(ix) Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated
March 3, 2014, which was incorporated by reference on December 29,
2015 (80 FR 73096, November 24, 2015).
(x) Messier-Bugatti-Dowty Service Bulletin 631-32-232, dated
December 8, 2014, which is not incorporated by reference in this AD.

(r) Other FAA AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
International Branch, ANM-116, Transport Airplane Directorate, FAA,
has the authority to approve AMOCs for this AD, if requested using
the procedures found in 14 CFR 39.19. In accordance with 14 CFR
39.19, send your request to your principal inspector or local Flight
Standards District Office, as appropriate. If sending information
directly to the manager of the International Branch, send it to the
attention of the person identified in paragraph (s)(2) of this AD.
Information may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov.
(i) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(ii) AMOCs approved previously for AD 2015-23-12 are approved as
AMOCs for the corresponding provisions of this AD.
(2) Contacting the Manufacturer: As of the effective date of
this AD, for any requirement in this AD to obtain corrective actions
from a manufacturer, the action must be accomplished using a method
approved by the Manager, International Branch, ANM-116, Transport
Airplane Directorate, FAA; or the EASA; or ATR-GIE Avions de
Transport R[eacute]gional's EASA DOA. If approved by the DOA, the
approval must include the DOA-authorized signature.

(s) Related Information

(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) EASA Airworthiness Directive 2016-0135, dated July 8, 2016,
for related information. This MCAI may be found in the AD docket on
the Internet at https://www.regulations.gov by searching for and
locating Docket No. FAA-2017-0516.
(2) For more information about this AD, contact Shahram
Daneshmandi, Aerospace Engineer, International Branch, ANM-116,
Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton,
WA 98057-3356; telephone 425-227-1112; fax 425-227-1149.
(3) For service information identified in this AD, contact ATR-
GIE Avions de Transport R[eacute]gional, 1, All[eacute]e Pierre
Nadot, 31712 Blagnac Cedex, France; telephone +33 (0) 5 62 21 62 21;
fax +33 (0) 5 62 21 67 18; email continued.airworthiness@atr.fr;
Internet https://www.aerochain.com. You may view this service
information at the FAA, Transport Airplane Directorate, 1601 Lind
Avenue SW., Renton, WA. For information on the availability of this
material at the FAA, call 425-227-1221.

Issued in Renton, Washington, on May 19, 2017.
Victor Wicklund,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2017-10978 Filed 5-30-17; 8:45 am]
BILLING CODE 4910-13-P

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