Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 17473-17478 [2020-06505]

Download as PDF 17473 Rules and Regulations Federal Register Vol. 85, No. 61 Monday, March 30, 2020 This section of the FEDERAL REGISTER contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510. The Code of Federal Regulations is sold by the Superintendent of Documents. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2019–0726; Product Identifier 2019–NM–102–AD; Amendment 39–19857; AD 2020–04–20] RIN 2120–AA64 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC–8–400 series airplanes. This AD was prompted by reports of wear on fuel couplings, bonding springs, and sleeves as well as fuel tube end ferrules and fuel component end ferrules. This AD requires repetitive inspections of certain parts for discrepancies that meet specified criteria, and replacement as necessary; repetitive inspections of certain parts for damage and wear, and rework of parts; and electrical bonding checks of certain couplings. This AD also requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. For certain airplanes, this AD allows a modification that would terminate the repetitive inspections. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective May 4, 2020. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of May 4, 2020. ADDRESSES: For service information identified in this final rule, contact De lotter on DSKBCFDHB2PROD with RULES SUMMARY: VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416–375– 4000; fax 416–375–4539; email thd@ dehavilland.com; internet https:// dehavilland.com. You may view this service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA–2019–0726. 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–2019– 0726; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the regulatory evaluation, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aerospace Engineer, Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7366; fax 516–794–5531; email 9-avs-nyaco-cos@ faa.gov. SUPPLEMENTARY INFORMATION: Discussion Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian AD CF–2017–04R2, dated September 25, 2018 (also referred to as the Mandatory Continuing Airworthiness Information, or ‘‘the MCAI’’), to correct an unsafe condition for certain De Havilland Aircraft of Canada Limited Model DHC– 8–400 series airplanes. 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–2019– 0726. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 part 39 by adding an AD that would apply to certain De Havilland Aircraft of Canada Limited Model DHC–8–400 series airplanes. The NPRM published in the Federal Register on October 30, 2019 (84 FR 58066). The NPRM was prompted by reports of wear on fuel couplings, bonding springs, and sleeves as well as fuel tube end ferrules and fuel component end ferrules. The NPRM proposed to require repetitive inspections of certain parts for discrepancies that meet specified criteria, and replacement as necessary; repetitive inspections of certain parts for damage and wear, and rework of parts; and electrical bonding checks of certain couplings. The NPRM also proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. For certain airplanes, the NPRM proposed to allow a modification that would terminate the repetitive inspections. The FAA is issuing this AD to address wear on fuel couplings, bonding springs, and sleeves as well as fuel tube end ferrules and fuel component end ferrules, which could reduce the integrity of the electrical bonding paths through the fuel line and components, and ultimately lead to fuel tank ignition in the event of a lightning strike. See the MCAI for additional background information. Comments The FAA gave the public the opportunity to participate in developing this final rule. The following presents the comment received on the NPRM and the FAA’s response to the comment. Request To Refer to Different Temporary Revisions (TRs) Horizon Air requested that paragraph (k) of the proposed AD be revised to refer to TR ALI–0192 and TR ALI–0193. The commenter suggested that the proposed AD contains typographical errors in referring to TR ALI–00AS and TR ALI–00AT. The FAA agrees to clarify. Paragraph (k) of the proposed AD requires incorporating ‘‘the information specified in Q400 Dash 8 (Bombardier) Temporary Revision ALI–00AS, dated April 24, 2018; and Q400 Dash 8 (Bombardier) Temporary Revision ALI– 00AT, dated April 24, 2018.’’ TCCA notified the FAA that TR ALI–00AS and TR ALI–00AT are temporary E:\FR\FM\30MRR1.SGM 30MRR1 17474 Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules and Regulations placeholder identifiers for TR ALI–0192 and TR ALI–0193. These temporary placeholder identifiers are used until the finalized TRs are provided new numerical identifiers. The FAA has confirmed that the information specified in these TRs is the same as the information specified in the TRs mentioned by the commenter. For these reasons, this AD has been revised to specify TR ALI–0192 and TR ALI–0193. Explanation of Change to Introductory Text to Paragraph (h) of This AD We have revised the introductory text to paragraph (h) of this AD to clarify that the actions apply to the same airplanes as those identified in the introductory text to paragraph (g) of this AD. Conclusion The FAA reviewed the relevant data, considered the comment received, and determined that air safety and the public interest require adopting this final rule with the changes described previously and minor editorial changes. The FAA has determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. The FAA also determined that these changes will not increase the economic burden on any operator or increase the scope of this final rule. rework (repair, replacement, or blending, as applicable) of parts; and a retrofit (structural rework) of the fuel couplings, isolators, and structural provisions. Bombardier has also issued Service Bulletin 84–28–26, Revision A, dated November 29, 2018. This service information describes procedures for electrical bonding checks of all threaded couplings on the inboard vent lines in the left and right wings. Bombardier has also issued Q400 Dash 8 (Bombardier) Temporary Revision ALI–0192, dated April 24, 2018; and Q400 Dash 8 (Bombardier) Temporary Revision ALI–0193, dated April 24, 2018. This service information describes airworthiness limitations for fuel tank systems. These documents are distinct since they describe different airworthiness limitations. 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. Related Service Information Under 1 CFR Part 51 Bombardier has issued Service Bulletin 84–28–20, Revision D, dated November 23, 2018. This service information describes procedures for repetitive detailed inspections of the clamshell coupling bonding wires, fuel couplings, and associated sleeves for discrepancies (wear and damage, including discoloration, worn coating, scuffing and grooves) that meet specified criteria, and replacement. This service information also describes procedures for repetitive detailed inspections for damage and wear of the fuel tube end ferrules, fuel component end ferrules, and ferrule O-ring flanges, and rework of parts. Bombardier has also issued Service Bulletin 84–28–21, Revision C, dated July 13, 2018. This service information describes procedures for a detailed inspection for damage and wear of the fuel tube end ferrules, fuel component end ferrules, and ferrule O-ring flanges; Costs of Compliance The FAA estimates that this AD affects 52 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: ESTIMATED COSTS FOR REQUIRED ACTIONS * Labor cost Parts cost Cost per product Cost on U.S. operators 268 work-hours × $85 per hour = $22,780 ................................................................................. $0 $22,780 $1,184,560 * Table does not include estimated costs for revising the maintenance or inspection program. The FAA has determined that revising the maintenance or inspection program takes an average of 90 work-hours per operator, although this number may vary from operator to operator. In the past, the FAA has estimated that this action takes 1 work-hour per airplane. Since operators incorporate maintenance or inspection program changes for their affected fleet(s), the FAA has determined that a per-operator estimate is more accurate than a per- airplane estimate. Therefore, the FAA estimates the total cost per operator to be $7,650 (90 work-hours × $85 per work-hour). ESTIMATED COSTS FOR OPTIONAL ACTIONS Labor cost Parts cost Cost per product 525 work-hours × $85 per hour = $44,625 ............................................................................................................. $20,906 $65,531 lotter on DSKBCFDHB2PROD with RULES The FAA estimates the following costs to do any necessary on-condition actions that would be required based on the results of any required or optional actions. The FAA has no way of determining the number of aircraft that might need these on-condition actions: ESTIMATED COSTS OF ON-CONDITION ACTIONS Labor cost Parts cost Cost per product 174 work-hours × $85 per hour = $14,790 ............................................................................................................. $16,767 $31,557 VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 E:\FR\FM\30MRR1.SGM 30MRR1 Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules and Regulations 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. The FAA is 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 This AD will not have federalism implications under Executive Order 13132. This AD will 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 that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) 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. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: lotter on DSKBCFDHB2PROD with RULES ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 2020–04–20 De Havilland Aircraft of Canada Limited (Type Certificate previously held by Bombardier, Inc.): Amendment 39–19857; Docket No. FAA–2019–0726; Product Identifier 2019–NM–102–AD. (a) Effective Date This AD is effective May 4, 2020. (b) Affected ADs None. (c) Applicability This AD applies to De Havilland Aircraft of Canada Limited Model DHC–8–400, –401, and –402 airplanes, certificated in any category, manufacturer serial numbers 4001, 4003, and subsequent. (d) Subject Air Transport Association (ATA) of America Code 28, Fuel. (e) Reason This AD was prompted by reports of wear on fuel couplings, bonding springs, and sleeves as well as fuel tube end ferrules and fuel component end ferrules. The FAA is issuing this AD to address such wear, which could reduce the integrity of the electrical bonding paths through the fuel line and components, and ultimately lead to fuel tank ignition in the event of a lightning strike. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Initial Inspection Compliance Times For airplanes having serial numbers 4001 and 4003 through 4575 inclusive that, as of the effective date of this AD, have not done the actions specified in Bombardier Service Bulletin 84–28–21: At the applicable times specified in paragraph (g)(1) or (2) of this AD, do the actions specified in paragraphs (h)(1) and (2) of this AD. (1) For all airplanes except those identified in paragraph (g)(2) of this AD: Within 6,000 flight hours or 36 months, whichever occurs first after the effective date of this AD. (2) For airplanes with an original airworthiness certificate or original export certificate of airworthiness issued on or after the effective date of this AD: Within 6,000 flight hours or 36 months, whichever occurs first after the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness. (h) Repetitive Inspections and Corrective Actions For airplanes having serial numbers 4001 and 4003 through 4575 inclusive that, as of the effective date of this AD, have not done the actions specified in Bombardier Service Bulletin 84–28–21: At the applicable times specified in paragraph (g)(1) or (2) of this AD, do the actions specified in paragraphs (h)(1) and (2) of this AD. Repeat the actions thereafter at intervals not to exceed 6,000 flight hours or 36 months, whichever occurs first. (1) Do a detailed inspection of the clamshell coupling bonding wires, fuel PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 17475 couplings, and associated sleeves for discrepancies that meet specified criteria, as identified in, and in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment Instructions of Bombardier Service Bulletin 84–28–20, Revision D, dated November 23, 2018. If any conditions are found meeting the criteria specified in Bombardier Service Bulletin 84–28–20, Revision D, dated November 23, 2018, before further flight, replace affected parts with new couplings and sleeves of the same part number, in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment Instructions of Bombardier Service Bulletin 84–28–20, Revision D, dated November 23, 2018. (2) Do a detailed inspection of the fuel tube end ferrules, fuel component end ferrules, and ferrule O-ring flanges for damage and wear, and rework (repair, replace, or blend, as applicable) the parts, in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment Instructions of Bombardier Service Bulletin 84–28–20, Revision D, dated November 23, 2018. (i) Optional Terminating Action for Repetitive Inspections For airplanes having serial numbers 4001 and 4003 through 4575 inclusive: Doing a detailed inspection of the fuel tube end ferrules, fuel component end ferrules, and ferrule O-ring flanges for damage and wear, and reworking (repair, replace, or blend, as applicable) the parts; and doing a retrofit (structural rework) of the fuel couplings, isolators, and structural provisions, in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment Instructions of Bombardier Service Bulletin 84–28–21, Revision C, dated July 13, 2018, terminates the inspections specified in paragraphs (h)(1) and (2) of this AD. (j) Electrical Bonding Checks/Detailed Inspection For airplanes having serial numbers 4001, 4003 through 4489 inclusive, and 4491 through 4575 inclusive that, as of the effective date of this AD, have done the actions specified in Bombardier Service Bulletin 84–28–21, Revision A, dated September 29, 2017; and airplanes having serial numbers 4576 through 4581 inclusive: Within 6,000 flight hours or 36 months after the effective date of this AD, whichever occurs first, do the actions specified in paragraph (j)(1) or (2) of this AD. (1) Accomplish electrical bonding checks of all threaded couplings on the inboard vent lines in the left and right wings, in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment Instructions of Bombardier Service Bulletin 84–28–26, Revision A, dated November 29, 2018. (2) Do a detailed inspection of the fuel tube end ferrules, fuel component end ferrules, and ferrule O-ring flanges for damage and wear, and rework (repair, replace, or blend, as applicable) the parts; and a retrofit (structural rework) of the fuel couplings, isolators, and structural provisions in accordance with paragraph 3.B., ‘‘Procedure,’’ of the Accomplishment E:\FR\FM\30MRR1.SGM 30MRR1 17476 Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules and Regulations Instructions of Bombardier Service Bulletin 84–28–21, Revision C, dated July 13, 2018. (k) Maintenance or Inspection Program Revision Within 30 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in Q400 Dash 8 (Bombardier) Temporary Revision ALI–0192, dated April 24, 2018; and Q400 Dash 8 (Bombardier) Temporary Revision ALI–0193, dated April 24, 2018. Except as specified in paragraph (l) of this AD, the initial compliance time for doing the tasks in Q400 Dash 8 (Bombardier) Temporary Revision ALI–0192, dated April 24, 2018, is at the time specified in Q400 Dash 8 (Bombardier) Temporary Revision ALI–0192, dated April 24, 2018, or within 30 days after the effective date of this AD, whichever occurs later. (l) Initial Compliance Time for Task 284000– 419 lotter on DSKBCFDHB2PROD with RULES The initial compliance time for task 284000–419 is at the time specified in paragraph (l)(1) or (2) of this AD, as applicable, or within 30 days after the effective date of this AD, whichever occurs later. (1) For airplanes having serial numbers 4001 and 4003 through 4575, inclusive: Within 18,000 flight hours or 108 months, whichever occurs first, after the earliest date of embodiment of Bombardier Service Bulletin 84–28–21 on the airplane. (2) For airplanes having serial numbers 4576 and subsequent: Within 18,000 flight hours or 108 months, whichever occurs first, from the date of issuance of the original airworthiness certificate or original export certificate of airworthiness. VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 (m) No Alternative Actions, Intervals, or Critical Design Configuration Control Limitations (CDCCLs) After the existing maintenance or inspection program has been revised as required by paragraph (k) of this AD, no alternative actions (e.g., inspections), intervals, or CDCCLs may be used unless the actions, intervals, and CDCCLs are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (p)(1) of this AD. (n) No Reporting Requirement Although Bombardier Service Bulletin 84– 28–20, Revision D, dated November 23, 2018, specifies to submit certain information to the manufacturer, this AD does not include that requirement. (o) Credit for Previous Actions (1) This paragraph provides credit for the actions required by paragraphs (h)(1) and (2) of this AD, if those actions were performed before the effective date of this AD using the service information specified in paragraph (o)(1)(i), (ii), or (iii) of this AD. (i) Bombardier Service Bulletin 84–28–20, Revision A, dated December 14, 2016. (ii) Bombardier Service Bulletin 84–28–20, Revision B, dated February 13, 2017. (iii) Bombardier Service Bulletin 84–28–20, Revision C, dated April 28, 2017. (2) For the airplane having serial number 4164, this paragraph provides credit for the initial inspections required by paragraphs (h)(1) and (2) of this AD, if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 84–28–20, dated September 30, 2016. (3) This paragraph provides credit for the actions specified in paragraph (i) of this AD PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 if those actions were performed before the effective date of this AD using the service information specified in paragraph (o)(3)(i), (ii), or (iii) of this AD. (i) Bombardier Service Bulletin 84–28–21, dated August 31, 2017. (ii) Bombardier Service Bulletin 84–28–21, Revision A, dated September 29, 2017. (iii) Bombardier Service Bulletin 84–28–21, Revision B, dated June 8, 2018. (4) This paragraph provides credit for the actions required by paragraph (j)(1) of this AD if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 84–28–26, dated August 14, 2018. (5) This paragraph provides credit for the actions required by paragraph (j)(2) of this AD if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 84–28–21, Revision B, dated June 8, 2018. (6) For airplanes having serial numbers 4001, 4003 through 4489 inclusive, and 4491 through 4575 inclusive, and that are post Bombardier Service Bulletin 84–28–21, Revision A, dated September 29, 2017: This paragraph provides credit for the actions required by paragraph (j) of this AD if those actions were performed prior to the effective date of this AD using the service information specified in paragraph (o)(6)(i) or (ii) of this AD. (i) Bombardier Modification Summary Package (ModSum) IS4Q2800032, dated February 1, 2018. (ii) Any airworthiness limitation change request (ACR) specified in figure 1 to paragraph (o)(6)(ii) of this AD. BILLING CODE 4910–13–P E:\FR\FM\30MRR1.SGM 30MRR1 Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules and Regulations 17477 Figure 1 to paragraph (o)(6)(ii)-ACRs lotter on DSKBCFDHB2PROD with RULES BILLING CODE 4910–13–C (p) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO Branch, 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 certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7300; fax 516–794–5531. 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. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or De Havilland Aircraft of Canada Limited’s TCCA Design Approval Organization (DAO). If approved by the DAO, VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 Dated 400-072 January 24, 2018 400-073 January 23, 2018 400-074 January 24, 2018 400-077 February 27, 2018 400-078 March 21, 2018 400-079 April 18, 2018 400-080 April 30, 2018 400-081 May 4, 2018 400-082 May 4, 2018 400-083 June 4, 2018 400-084 May 18, 2018 the approval must include the DAOauthorized signature. (q) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) Canadian Airworthiness Directive CF–2017–04R2, dated September 25, 2018, 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–2019–0726. (2) For more information about this AD, contact Joseph Catanzaro, Aerospace Engineer, Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7366; fax 516–794–5531; email 9-avs-nyaco-cos@faa.gov. (3) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (r)(3) and (4) of this AD. (r) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise. PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 (i) Bombardier Service Bulletin 84–28–20, Revision D, dated November 23, 2018. (ii) Bombardier Service Bulletin 84–28–21, Revision C, dated July 13, 2018. (iii) Bombardier Service Bulletin 84–28–26, Revision A, dated November 29, 2018. (iv) Bombardier Q400 Dash 8 (Bombardier) Temporary Revision ALI–0192, dated April 24, 2018. (v) Q400 Dash 8 (Bombardier) Temporary Revision ALI–0193, dated April 24, 2018. (3) For service information identified in this AD, contact De Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416– 375–4000; fax 416–375–4539; email thd@ dehavilland.com; internet https:// dehavilland.com. (4) You may view this service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email fedreg.legal@nara.gov, or go to: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. E:\FR\FM\30MRR1.SGM 30MRR1 ER30MR20.000</GPH> ACRNumber 17478 Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules and Regulations Issued on March 1, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–06505 Filed 3–27–20; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2019–0865; Product Identifier 2019–NM–158–AD; Amendment 39–19854; AD 2020–04–17] RIN 2120–AA64 Airworthiness Directives; Airbus SAS Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A350–941 and –1041 airplanes. This AD was prompted by reports of passenger door girt bar fitting assembly safety hooks being stuck in the upward position. This AD requires repetitive detailed inspections of girt bar fitting assemblies, repetitive greasing of girt bar fitting assembly bushes, and, depending on findings, accomplishment of applicable corrective actions, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective May 4, 2020. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of May 4, 2020. ADDRESSES: For the material incorporated by reference (IBR) in this AD, contact the EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 89990 1000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this IBR material on the EASA website at https://ad.easa.europa.eu. You may view this IBR material at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2019– 0865. lotter on DSKBCFDHB2PROD with RULES SUMMARY: VerDate Sep<11>2014 16:52 Mar 27, 2020 Jkt 250001 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–2019– 0865; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the regulatory evaluation, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Kathleen Arrigotti, Aerospace Engineer, International Section, Transport Standards Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone and fax 206–231–3218; email kathleen.arrigotti@faa.gov. SUPPLEMENTARY INFORMATION: Discussion The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2019–0207, dated August 22, 2019 (‘‘EASA AD 2019–0207’’) (also referred to as the Mandatory Continuing Airworthiness Information, or ‘‘the MCAI’’), to correct an unsafe condition for all Airbus SAS Model A350–941 and –1041 airplanes. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Airbus SAS Model A350– 941 and –1041 airplanes. The NPRM published in the Federal Register on November 15, 2019 (84 FR 62485). The NPRM was prompted by reports of passenger door girt bar fitting assembly safety hooks being stuck in the upward position. The NPRM proposed to require repetitive detailed inspections of girt bar fitting assemblies, repetitive greasing of girt bar fitting assembly bushes, and, depending on findings, accomplishment of applicable corrective actions. The FAA is issuing this AD to address passenger door girt bar fitting assembly safety hooks being stuck in the upward position, which could lead to girt bar disengagement from the girt bar fitting assembly and consequent failure of the passenger door slide deployment during an emergency, possibly preventing safe evacuation of the airplane. See the MCAI for additional background information. Comments The FAA gave the public the opportunity to participate in developing PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 this final rule. The following presents the comments received on the NPRM and the FAA’s response to each comment. Support for the NPRM The Air Line Pilots Association, International (ALPA) indicated its support for the NPRM. Request To Remove or Revise Reporting Requirement Delta Air Lines (Delta) requested that the proposed AD be revised to either not require reporting or to require reporting only in the case of discrepant findings. Delta noted that only 5 discrepant safety hooks were found during its inspection of 1,408 fittings. Delta added that the final fix will include a retrofit of the girt bar fittings, which should occur regardless of the number of reported failures. The FAA disagrees with the commenter’s request. Reporting is necessary for the girt bar fitting assembly manufacturer to determine the extent of the discrepancies and to ascertain any necessary follow-on actions. The FAA has not changed this AD in this regard. Request To Revise Reporting Compliance Time Delta requested that paragraph (h)(3)(i) of the proposed AD be reworded to state that inspection report must be submitted within 90 days after the end of the maintenance visit/check during which the inspection was performed, rather than within 90 days after the inspection. Delta noted that maintenance personnel often do not report findings to engineering until closure of the maintenance visit/check, which usually happens several days or weeks after the inspection was actually performed. Delta suggested that the revised reporting time would remove restrictive time constraints while still meeting the intent of the proposed AD. The FAA agrees with the commenter’s request for the reasons provided. The FAA has revised paragraph (h)(3)(i) of this AD to specify that a report of findings must be submitted within 90 days after the conclusion of the maintenance visit or check where the inspection was completed. Conclusion The FAA reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this final rule with the change described previously and minor editorial changes. The FAA has determined that these minor changes: E:\FR\FM\30MRR1.SGM 30MRR1

Agencies

[Federal Register Volume 85, Number 61 (Monday, March 30, 2020)]
[Rules and Regulations]
[Pages 17473-17478]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-06505]



========================================================================
Rules and Regulations
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains regulatory documents 
having general applicability and legal effect, most of which are keyed 
to and codified in the Code of Federal Regulations, which is published 
under 50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by the Superintendent of Documents. 

========================================================================


Federal Register / Vol. 85, No. 61 / Monday, March 30, 2020 / Rules 
and Regulations

[[Page 17473]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0726; Product Identifier 2019-NM-102-AD; Amendment 
39-19857; AD 2020-04-20]
RIN 2120-AA64


Airworthiness Directives; De Havilland Aircraft of Canada Limited 
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series 
airplanes. This AD was prompted by reports of wear on fuel couplings, 
bonding springs, and sleeves as well as fuel tube end ferrules and fuel 
component end ferrules. This AD requires repetitive inspections of 
certain parts for discrepancies that meet specified criteria, and 
replacement as necessary; repetitive inspections of certain parts for 
damage and wear, and rework of parts; and electrical bonding checks of 
certain couplings. This AD also requires revising the existing 
maintenance or inspection program, as applicable, to incorporate new or 
more restrictive airworthiness limitations. For certain airplanes, this 
AD allows a modification that would terminate the repetitive 
inspections. The FAA is issuing this AD to address the unsafe condition 
on these products.

DATES: This AD is effective May 4, 2020.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of May 4, 2020.

ADDRESSES: For service information identified in this final rule, 
contact De Havilland Aircraft of Canada Limited, Q-Series Technical 
Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; 
telephone 416-375-4000; fax 416-375-4539; email [email protected]; 
internet https://dehavilland.com. You may view this service information 
at the FAA, Transport Standards Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at the 
FAA, call 206-231-3195. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2019-
0726.

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-2019-
0726; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this final rule, the regulatory evaluation, any comments received, and 
other information. The address for Docket Operations is U.S. Department 
of Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aerospace Engineer, 
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart 
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7366; fax 516-
794-5531; email [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian AD CF-2017-04R2, dated 
September 25, 2018 (also referred to as the Mandatory Continuing 
Airworthiness Information, or ``the MCAI''), to correct an unsafe 
condition for certain De Havilland Aircraft of Canada Limited Model 
DHC-8-400 series airplanes. 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-2019-0726.
    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to certain De Havilland 
Aircraft of Canada Limited Model DHC-8-400 series airplanes. The NPRM 
published in the Federal Register on October 30, 2019 (84 FR 58066). 
The NPRM was prompted by reports of wear on fuel couplings, bonding 
springs, and sleeves as well as fuel tube end ferrules and fuel 
component end ferrules. The NPRM proposed to require repetitive 
inspections of certain parts for discrepancies that meet specified 
criteria, and replacement as necessary; repetitive inspections of 
certain parts for damage and wear, and rework of parts; and electrical 
bonding checks of certain couplings. The NPRM also proposed to require 
revising the existing maintenance or inspection program, as applicable, 
to incorporate new or more restrictive airworthiness limitations. For 
certain airplanes, the NPRM proposed to allow a modification that would 
terminate the repetitive inspections. The FAA is issuing this AD to 
address wear on fuel couplings, bonding springs, and sleeves as well as 
fuel tube end ferrules and fuel component end ferrules, which could 
reduce the integrity of the electrical bonding paths through the fuel 
line and components, and ultimately lead to fuel tank ignition in the 
event of a lightning strike. See the MCAI for additional background 
information.

Comments

    The FAA gave the public the opportunity to participate in 
developing this final rule. The following presents the comment received 
on the NPRM and the FAA's response to the comment.

Request To Refer to Different Temporary Revisions (TRs)

    Horizon Air requested that paragraph (k) of the proposed AD be 
revised to refer to TR ALI-0192 and TR ALI-0193. The commenter 
suggested that the proposed AD contains typographical errors in 
referring to TR ALI-00AS and TR ALI-00AT.
    The FAA agrees to clarify. Paragraph (k) of the proposed AD 
requires incorporating ``the information specified in Q400 Dash 8 
(Bombardier) Temporary Revision ALI-00AS, dated April 24, 2018; and 
Q400 Dash 8 (Bombardier) Temporary Revision ALI-00AT, dated April 24, 
2018.'' TCCA notified the FAA that TR ALI-00AS and TR ALI-00AT are 
temporary

[[Page 17474]]

placeholder identifiers for TR ALI-0192 and TR ALI-0193. These 
temporary placeholder identifiers are used until the finalized TRs are 
provided new numerical identifiers. The FAA has confirmed that the 
information specified in these TRs is the same as the information 
specified in the TRs mentioned by the commenter. For these reasons, 
this AD has been revised to specify TR ALI-0192 and TR ALI-0193.

Explanation of Change to Introductory Text to Paragraph (h) of This AD

    We have revised the introductory text to paragraph (h) of this AD 
to clarify that the actions apply to the same airplanes as those 
identified in the introductory text to paragraph (g) of this AD.

Conclusion

    The FAA reviewed the relevant data, considered the comment 
received, and determined that air safety and the public interest 
require adopting this final rule with the changes described previously 
and minor editorial changes. The FAA has determined that these minor 
changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.
    The FAA also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this final 
rule.

Related Service Information Under 1 CFR Part 51

    Bombardier has issued Service Bulletin 84-28-20, Revision D, dated 
November 23, 2018. This service information describes procedures for 
repetitive detailed inspections of the clamshell coupling bonding 
wires, fuel couplings, and associated sleeves for discrepancies (wear 
and damage, including discoloration, worn coating, scuffing and 
grooves) that meet specified criteria, and replacement. This service 
information also describes procedures for repetitive detailed 
inspections for damage and wear of the fuel tube end ferrules, fuel 
component end ferrules, and ferrule O-ring flanges, and rework of 
parts.
    Bombardier has also issued Service Bulletin 84-28-21, Revision C, 
dated July 13, 2018. This service information describes procedures for 
a detailed inspection for damage and wear of the fuel tube end 
ferrules, fuel component end ferrules, and ferrule O-ring flanges; 
rework (repair, replacement, or blending, as applicable) of parts; and 
a retrofit (structural rework) of the fuel couplings, isolators, and 
structural provisions.
    Bombardier has also issued Service Bulletin 84-28-26, Revision A, 
dated November 29, 2018. This service information describes procedures 
for electrical bonding checks of all threaded couplings on the inboard 
vent lines in the left and right wings.
    Bombardier has also issued Q400 Dash 8 (Bombardier) Temporary 
Revision ALI-0192, dated April 24, 2018; and Q400 Dash 8 (Bombardier) 
Temporary Revision ALI-0193, dated April 24, 2018. This service 
information describes airworthiness limitations for fuel tank systems. 
These documents are distinct since they describe different 
airworthiness limitations.
    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.

Costs of Compliance

    The FAA estimates that this AD affects 52 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                     Estimated Costs for Required Actions *
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
268 work-hours x $85 per hour = $22,780......................              $0          $22,780       $1,184,560
----------------------------------------------------------------------------------------------------------------
* Table does not include estimated costs for revising the maintenance or inspection program.

    The FAA has determined that revising the maintenance or inspection 
program takes an average of 90 work-hours per operator, although this 
number may vary from operator to operator. In the past, the FAA has 
estimated that this action takes 1 work-hour per airplane. Since 
operators incorporate maintenance or inspection program changes for 
their affected fleet(s), the FAA has determined that a per-operator 
estimate is more accurate than a per-airplane estimate. Therefore, the 
FAA estimates the total cost per operator to be $7,650 (90 work-hours x 
$85 per work-hour).

                                      Estimated Costs for Optional Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                                  Labor cost                                       Parts cost        product
----------------------------------------------------------------------------------------------------------------
525 work-hours x $85 per hour = $44,625.......................................         $20,906          $65,531
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of any 
required or optional actions. The FAA has no way of determining the 
number of aircraft that might need these on-condition actions:

                                     Estimated Costs of On-Condition Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                                  Labor cost                                       Parts cost        product
----------------------------------------------------------------------------------------------------------------
174 work-hours x $85 per hour = $14,790.......................................         $16,767          $31,557
----------------------------------------------------------------------------------------------------------------


[[Page 17475]]

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.
    The FAA is 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

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) 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.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 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 adding the following new airworthiness 
directive (AD):

2020-04-20 De Havilland Aircraft of Canada Limited (Type Certificate 
previously held by Bombardier, Inc.): Amendment 39-19857; Docket No. 
FAA-2019-0726; Product Identifier 2019-NM-102-AD.

(a) Effective Date

    This AD is effective May 4, 2020.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to De Havilland Aircraft of Canada Limited Model 
DHC-8-400, -401, and -402 airplanes, certificated in any category, 
manufacturer serial numbers 4001, 4003, and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) Reason

    This AD was prompted by reports of wear on fuel couplings, 
bonding springs, and sleeves as well as fuel tube end ferrules and 
fuel component end ferrules. The FAA is issuing this AD to address 
such wear, which could reduce the integrity of the electrical 
bonding paths through the fuel line and components, and ultimately 
lead to fuel tank ignition in the event of a lightning strike.

(f) Compliance

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

(g) Initial Inspection Compliance Times

    For airplanes having serial numbers 4001 and 4003 through 4575 
inclusive that, as of the effective date of this AD, have not done 
the actions specified in Bombardier Service Bulletin 84-28-21: At 
the applicable times specified in paragraph (g)(1) or (2) of this 
AD, do the actions specified in paragraphs (h)(1) and (2) of this 
AD.
    (1) For all airplanes except those identified in paragraph 
(g)(2) of this AD: Within 6,000 flight hours or 36 months, whichever 
occurs first after the effective date of this AD.
    (2) For airplanes with an original airworthiness certificate or 
original export certificate of airworthiness issued on or after the 
effective date of this AD: Within 6,000 flight hours or 36 months, 
whichever occurs first after the date of issuance of the original 
airworthiness certificate or the date of issuance of the original 
export certificate of airworthiness.

(h) Repetitive Inspections and Corrective Actions

    For airplanes having serial numbers 4001 and 4003 through 4575 
inclusive that, as of the effective date of this AD, have not done 
the actions specified in Bombardier Service Bulletin 84-28-21: At 
the applicable times specified in paragraph (g)(1) or (2) of this 
AD, do the actions specified in paragraphs (h)(1) and (2) of this 
AD. Repeat the actions thereafter at intervals not to exceed 6,000 
flight hours or 36 months, whichever occurs first.
    (1) Do a detailed inspection of the clamshell coupling bonding 
wires, fuel couplings, and associated sleeves for discrepancies that 
meet specified criteria, as identified in, and in accordance with 
paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of 
Bombardier Service Bulletin 84-28-20, Revision D, dated November 23, 
2018. If any conditions are found meeting the criteria specified in 
Bombardier Service Bulletin 84-28-20, Revision D, dated November 23, 
2018, before further flight, replace affected parts with new 
couplings and sleeves of the same part number, in accordance with 
paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of 
Bombardier Service Bulletin 84-28-20, Revision D, dated November 23, 
2018.
    (2) Do a detailed inspection of the fuel tube end ferrules, fuel 
component end ferrules, and ferrule O-ring flanges for damage and 
wear, and rework (repair, replace, or blend, as applicable) the 
parts, in accordance with paragraph 3.B., ``Procedure,'' of the 
Accomplishment Instructions of Bombardier Service Bulletin 84-28-20, 
Revision D, dated November 23, 2018.

(i) Optional Terminating Action for Repetitive Inspections

    For airplanes having serial numbers 4001 and 4003 through 4575 
inclusive: Doing a detailed inspection of the fuel tube end 
ferrules, fuel component end ferrules, and ferrule O-ring flanges 
for damage and wear, and reworking (repair, replace, or blend, as 
applicable) the parts; and doing a retrofit (structural rework) of 
the fuel couplings, isolators, and structural provisions, in 
accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment 
Instructions of Bombardier Service Bulletin 84-28-21, Revision C, 
dated July 13, 2018, terminates the inspections specified in 
paragraphs (h)(1) and (2) of this AD.

(j) Electrical Bonding Checks/Detailed Inspection

    For airplanes having serial numbers 4001, 4003 through 4489 
inclusive, and 4491 through 4575 inclusive that, as of the effective 
date of this AD, have done the actions specified in Bombardier 
Service Bulletin 84-28-21, Revision A, dated September 29, 2017; and 
airplanes having serial numbers 4576 through 4581 inclusive: Within 
6,000 flight hours or 36 months after the effective date of this AD, 
whichever occurs first, do the actions specified in paragraph (j)(1) 
or (2) of this AD.
    (1) Accomplish electrical bonding checks of all threaded 
couplings on the inboard vent lines in the left and right wings, in 
accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment 
Instructions of Bombardier Service Bulletin 84-28-26, Revision A, 
dated November 29, 2018.
    (2) Do a detailed inspection of the fuel tube end ferrules, fuel 
component end ferrules, and ferrule O-ring flanges for damage and 
wear, and rework (repair, replace, or blend, as applicable) the 
parts; and a retrofit (structural rework) of the fuel couplings, 
isolators, and structural provisions in accordance with paragraph 
3.B., ``Procedure,'' of the Accomplishment

[[Page 17476]]

Instructions of Bombardier Service Bulletin 84-28-21, Revision C, 
dated July 13, 2018.

(k) Maintenance or Inspection Program Revision

    Within 30 days after the effective date of this AD, revise the 
existing maintenance or inspection program, as applicable, to 
incorporate the information specified in Q400 Dash 8 (Bombardier) 
Temporary Revision ALI-0192, dated April 24, 2018; and Q400 Dash 8 
(Bombardier) Temporary Revision ALI-0193, dated April 24, 2018. 
Except as specified in paragraph (l) of this AD, the initial 
compliance time for doing the tasks in Q400 Dash 8 (Bombardier) 
Temporary Revision ALI-0192, dated April 24, 2018, is at the time 
specified in Q400 Dash 8 (Bombardier) Temporary Revision ALI-0192, 
dated April 24, 2018, or within 30 days after the effective date of 
this AD, whichever occurs later.

(l) Initial Compliance Time for Task 284000-419

    The initial compliance time for task 284000-419 is at the time 
specified in paragraph (l)(1) or (2) of this AD, as applicable, or 
within 30 days after the effective date of this AD, whichever occurs 
later.
    (1) For airplanes having serial numbers 4001 and 4003 through 
4575, inclusive: Within 18,000 flight hours or 108 months, whichever 
occurs first, after the earliest date of embodiment of Bombardier 
Service Bulletin 84-28-21 on the airplane.
    (2) For airplanes having serial numbers 4576 and subsequent: 
Within 18,000 flight hours or 108 months, whichever occurs first, 
from the date of issuance of the original airworthiness certificate 
or original export certificate of airworthiness.

(m) No Alternative Actions, Intervals, or Critical Design Configuration 
Control Limitations (CDCCLs)

    After the existing maintenance or inspection program has been 
revised as required by paragraph (k) of this AD, no alternative 
actions (e.g., inspections), intervals, or CDCCLs may be used unless 
the actions, intervals, and CDCCLs are approved as an alternative 
method of compliance (AMOC) in accordance with the procedures 
specified in paragraph (p)(1) of this AD.

(n) No Reporting Requirement

    Although Bombardier Service Bulletin 84-28-20, Revision D, dated 
November 23, 2018, specifies to submit certain information to the 
manufacturer, this AD does not include that requirement.

(o) Credit for Previous Actions

    (1) This paragraph provides credit for the actions required by 
paragraphs (h)(1) and (2) of this AD, if those actions were 
performed before the effective date of this AD using the service 
information specified in paragraph (o)(1)(i), (ii), or (iii) of this 
AD.
    (i) Bombardier Service Bulletin 84-28-20, Revision A, dated 
December 14, 2016.
    (ii) Bombardier Service Bulletin 84-28-20, Revision B, dated 
February 13, 2017.
    (iii) Bombardier Service Bulletin 84-28-20, Revision C, dated 
April 28, 2017.
    (2) For the airplane having serial number 4164, this paragraph 
provides credit for the initial inspections required by paragraphs 
(h)(1) and (2) of this AD, if those actions were performed before 
the effective date of this AD using Bombardier Service Bulletin 84-
28-20, dated September 30, 2016.
    (3) This paragraph provides credit for the actions specified in 
paragraph (i) of this AD if those actions were performed before the 
effective date of this AD using the service information specified in 
paragraph (o)(3)(i), (ii), or (iii) of this AD.
    (i) Bombardier Service Bulletin 84-28-21, dated August 31, 2017.
    (ii) Bombardier Service Bulletin 84-28-21, Revision A, dated 
September 29, 2017.
    (iii) Bombardier Service Bulletin 84-28-21, Revision B, dated 
June 8, 2018.
    (4) This paragraph provides credit for the actions required by 
paragraph (j)(1) of this AD if those actions were performed before 
the effective date of this AD using Bombardier Service Bulletin 84-
28-26, dated August 14, 2018.
    (5) This paragraph provides credit for the actions required by 
paragraph (j)(2) of this AD if those actions were performed before 
the effective date of this AD using Bombardier Service Bulletin 84-
28-21, Revision B, dated June 8, 2018.
    (6) For airplanes having serial numbers 4001, 4003 through 4489 
inclusive, and 4491 through 4575 inclusive, and that are post 
Bombardier Service Bulletin 84-28-21, Revision A, dated September 
29, 2017: This paragraph provides credit for the actions required by 
paragraph (j) of this AD if those actions were performed prior to 
the effective date of this AD using the service information 
specified in paragraph (o)(6)(i) or (ii) of this AD.
    (i) Bombardier Modification Summary Package (ModSum) 
IS4Q2800032, dated February 1, 2018.
    (ii) Any airworthiness limitation change request (ACR) specified 
in figure 1 to paragraph (o)(6)(ii) of this AD.
BILLING CODE 4910-13-P

[[Page 17477]]

[GRAPHIC] [TIFF OMITTED] TR30MR20.000

BILLING CODE 4910-13-C

(p) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO Branch, 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 certification 
office, send it to ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 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.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or De 
Havilland Aircraft of Canada Limited's TCCA Design Approval 
Organization (DAO). If approved by the DAO, the approval must 
include the DAO-authorized signature.

(q) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2017-04R2, dated 
September 25, 2018, 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-2019-0726.
    (2) For more information about this AD, contact Joseph 
Catanzaro, Aerospace Engineer, Airframe and Propulsion Section, FAA, 
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 
11590; telephone 516-228-7366; fax 516-794-5531; email [email protected].
    (3) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (r)(3) and (4) of this AD.

(r) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 84-28-20, Revision D, dated 
November 23, 2018.
    (ii) Bombardier Service Bulletin 84-28-21, Revision C, dated 
July 13, 2018.
    (iii) Bombardier Service Bulletin 84-28-26, Revision A, dated 
November 29, 2018.
    (iv) Bombardier Q400 Dash 8 (Bombardier) Temporary Revision ALI-
0192, dated April 24, 2018.
    (v) Q400 Dash 8 (Bombardier) Temporary Revision ALI-0193, dated 
April 24, 2018.
    (3) For service information identified in this AD, contact De 
Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 
123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 
416-375-4000; fax 416-375-4539; email [email protected]; internet 
https://dehavilland.com.
    (4) You may view this service information at the FAA, Transport 
Standards Branch, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 
206-231-3195.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.


[[Page 17478]]


    Issued on March 1, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-06505 Filed 3-27-20; 8:45 am]
 BILLING CODE 4910-13-P