Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) Airplanes, 477-480 [2010-33329]

Download as PDF Federal Register / Vol. 76, No. 3 / Wednesday, January 5, 2011 / Proposed Rules List of Subjects in 14 CFR Part 25 Aircraft, Aviation safety, Reporting and recordkeeping requirements. The Proposed Amendment In consideration of the foregoing, the Federal Aviation Administration proposes to amend part 25 of Title 14, Code of Federal Regulations, as follows: PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES 1. The authority citation for part 25 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701– 44702, and 44704. 2. Amend § 25.729 by revising paragraphs (a)(1)(ii), (a)(1)(iii), (a)(3), (b), (e) introductory text, (e)(5), (f) introductory text, and (f)(1), and by adding paragraphs (e)(7) and (f)(3) to read as follows: srobinson on DSKHWCL6B1PROD with PROPOSALS § 25.729 Operating limitations. (a) * * * (1) * * * (ii) The combination of friction loads, inertia loads, brake torque loads, air loads, and gyroscopic loads resulting from the wheels rotating at a peripheral speed equal to 1.23 VSR (with the wingflaps in takeoff position at design takeoff weight), occurring during retraction and extension at any airspeed up to 1.5 VSR1 (with the wing-flaps in the approach position at design landing weight), and (iii) Any load factor up to those specified in § 25.345(a) for the wingflaps extended condition. * * * * * (3) Landing gear doors, their operating mechanism, and their supporting structures must be designed for the yawing maneuvers prescribed for the airplane in addition to the conditions of airspeed and load factor presented in paragraphs (a)(1) and (2) of this section. (b) Landing gear lock. There must be positive means to keep the landing gear extended in flight and on the ground. There must be positive means to keep the landing gear and doors in the correct retracted position in flight, unless it can be shown that lowering of the landing gear or doors, or flight with the landing gear or doors extended, at any speed, is not hazardous. * * * * * (e) Position indicator and warning device. If a retractable landing gear is used, there must be a landing gear position indicator easily visible to the pilot or to the appropriate crew members (as well as necessary devices to actuate the indicator) to indicate without ambiguity that the retractable VerDate Mar<15>2010 16:45 Jan 04, 2011 Jkt 223001 units and their associated doors are secured in the extended (or retracted) position. The means must be designed as follows: * * * * * (5) The system used to generate the aural warning must be designed to minimize false or inappropriate alerts. * * * * * (7) A clear indication or warning must be provided whenever the landing gear position is not consistent with the landing gear selector lever position. (f) Protection of equipment on landing gear and in wheel wells. Equipment that is essential to the safe operation of the airplane and that is located on the landing gear or in wheel wells must be protected from the damaging effects of— (1) A bursting tire; * * * * * (3) Possible wheel brake temperatures. 3. Amend § 25.773 by revising paragraph (b)(2) and adding paragraphs (b)(3) and (b)(4) to read as follows: § 25.773 Pilot compartment view. * * * * * (b) * * * (2) No single failure of the systems used to provide the view required by paragraph (b)(1) of this section may cause the loss of that view by both pilots in the specified precipitation conditions. (3) The first pilot must have a window that— (i) Is openable under the conditions prescribed in paragraph (b)(1) of this section when the cabin is not pressurized; (ii) Provides the view specified in paragraph (b)(1) of this section; and (iii) Provides sufficient protection from the elements against impairment of the pilot’s vision. (4) The openable window specified in paragraph (b)(3) of this section need not be provided if it is shown that an area of the transparent surface will remain clear sufficient for at least one pilot to land the airplane safely in the event of— (i) Any system failure or combination of failures which is not extremely improbable, in accordance with § 25.1309, under the precipitation conditions specified in paragraph (b)(1) of this section. (ii) An encounter with severe hail, birds, or insects. * * * * * Issued in Washington, DC, on December 29, 2010. K.C. Yanamura, Acting Director, Aircraft Certification Service. [FR Doc. 2010–33347 Filed 1–4–11; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 477 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–1307; Directorate Identifier 2010–NM–049–AD] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc. Model CL–600–2A12 (CL–601) and CL–600–2B16 (CL–601–3A, CL–601– 3R, and CL–604 Variants) Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as SUMMARY: During flight-testing of a wing anti-ice piccolo tube containing a deliberate small breach, it was determined that the wing leading edge thermal switches were not detecting the consequent bleed leak at the design threshold. As a result, new Airworthiness Limitation tasks, consisting of a functional test of the wing leading edge thermal switches and an inspection of the wing anti-ice duct piccolo tubes, have been introduced in order to limit exposure to dormant failure of the switches in the event of piccolo tube failure, which could potentially compromise the structural integrity of the wing leading edge and the effectiveness of the wing anti-ice system. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI. DATES: We must receive comments on this proposed AD by February 22, 2011. ADDRESSES: You may send comments 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 proposed AD, contact Bombardier, E:\FR\FM\05JAP1.SGM 05JAP1 478 Federal Register / Vol. 76, No. 3 / Wednesday, January 5, 2011 / Proposed Rules ˆ Inc., 400 Cote-Vertu Road West, Dorval, ´ Quebec H4S 1Y9, Canada; telephone 514–855–5000; fax 514–855–7401; e-mail thd.crj@aero.bombardier.com; Internet https://www.bombardier.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. 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; or in person at the Docket Operations office 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: Cesar Gomez, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE–171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228– 7318; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: srobinson on DSKHWCL6B1PROD with PROPOSALS 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–2010–1307; Directorate Identifier 2010–NM–049–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 Transport Canada Civil Aviation, which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF–2009–49R1, dated January 21, 2010 (referred to after this as ‘‘the MCAI’’), to correct an unsafe VerDate Mar<15>2010 16:45 Jan 04, 2011 Jkt 223001 condition for the specified products. The MCAI states: develop on other products of the same type design. During flight-testing of a wing anti-ice piccolo tube containing a deliberate small breach, it was determined that the wing leading edge thermal switches were not detecting the consequent bleed leak at the design threshold. As a result, new Airworthiness Limitation tasks, consisting of a functional test of the wing leading edge thermal switches and an inspection of the wing anti-ice duct piccolo tubes, have been introduced in order to limit exposure to dormant failure of the switches in the event of piccolo tube failure, which could potentially compromise the structural integrity of the wing leading edge and the effectiveness of the wing anti-ice system. This directive mandates the revision of the approved maintenance schedule to include these new tasks, including phase-in schedules. This revision clarifies the applicability of the directive for CL–600–2A12 aircraft, serial numbers 3001 through 3066, and for CL– 600–2B16 aircraft, serial numbers 5001 through 5194. The directive is only applicable to these aircraft if Bombardier Service Bulletin (SB) 601–0590 [Scheduled Maintenance Instructions (MSG–3) Derived— Qualification] has been incorporated. There is no change required to the approved maintenance schedule if SB 601–0590 has not been incorporated. Differences Between This AD and the MCAI or Service Information We have reviewed the MCAI and related service information and, in general, agree with their substance. But we might have found it necessary to use different words from those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making these changes, we do not intend to differ substantively from the information provided in the MCAI and related service information. We might also have proposed different actions in this AD from those in the MCAI in order to follow FAA policies. Any such differences are highlighted in a Note within the proposed AD. You may obtain further information by examining the MCAI in the AD docket. Relevant Service Information Bombardier has issued the following service information: • Challenger 601 Time Limits/ Maintenance Checks, PSP 601–5, Revision 38, dated June 19, 2009. • Challenger 601 Time Limits/ Maintenance Checks, PSP 601A–5, Revision 34, dated June 19, 2009. • Challenger 604 Time Limits/ Maintenance Checks, CH 604 TLMC, Revision 13, dated August 12, 2009. • Challenger 605 Time Limits/ Maintenance Checks, CH 605 TLMC, Revision 1, dated August 12, 2009. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI. 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 PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 Costs of Compliance Based on the service information, we estimate that this proposed AD would affect about 103 products of U.S. registry. We also estimate that it would take about 1 work-hour per product to comply with the basic requirements of this proposed AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $8,755, or $85 per product. 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 E:\FR\FM\05JAP1.SGM 05JAP1 Federal Register / Vol. 76, No. 3 / Wednesday, January 5, 2011 / Proposed Rules 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); 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. We prepared a regulatory evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. 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, 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 adding the following new AD: 479 Bombardier, Inc.: Docket No. FAA–2010– 1307; Directorate Identifier 2010–NM– 049–AD. should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane. Comments Due Date (a) We must receive comments by February 22, 2011. Subject Affected ADs (b) None. (d) Air Transport Association (ATA) of America Codes 30 and 36: Ice and Rain Protection and Pneumatic, respectively. Reason Applicability (c) This AD applies to the airplanes identified in paragraphs (c)(1), (c)(2), (c)(3), and (c)(4) of this AD; certificated in any category. (1) Bombardier, Inc. Model CL–600–2A12 (CL–601) airplanes, serial numbers 3001 through 3066 inclusive on which Bombardier Service Bulletin 601–0590 has been accomplished. (2) Bombardier, Inc. CL–600–2B16 (CL– 601–3A and CL–601–3R Variants) airplanes, serial numbers 5001 through 5194 inclusive on which Bombardier Service Bulletin 601– 0590 has been accomplished. (3) Bombardier, Inc. CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5301 through 5665 inclusive. (4) Bombardier, Inc. CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5701 and subsequent. Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (j) of this AD. The request (e) The mandatory continuing airworthiness information (MCAI) states: During flight-testing of a wing anti-ice piccolo tube containing a deliberate small breach, it was determined that the wing leading edge thermal switches were not detecting the consequent bleed leak at the design threshold. As a result, new Airworthiness Limitation tasks, consisting of a functional test of the wing leading edge thermal switches and an inspection of the wing anti-ice duct piccolo tubes, have been introduced in order to limit exposure to dormant failure of the switches in the event of piccolo tube failure, which could potentially compromise the structural integrity of the wing leading edge and the effectiveness of the wing anti-ice system. Compliance (f) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Actions (g) Within 30 days after the effective date of this AD: Revise the Airworthiness Limitations Section of the Instructions for Continued Airworthiness by incorporating the applicable tasks identified in table 1 of this AD. TABLE 1—AIRWORTHINESS LIMITATIONS TASKS Incorporate task(s)— Identified in— CL–600–2A12 (CL–601) airplanes, serial numbers 3001 through 3066 inclusive on which Bombardier Service Bulletin 601–0590 has been accomplished. CL–600–2B16 (CL–601–3A and CL–601–3R Variants) airplanes, serial numbers 5001 through 5194 inclusive on which Bombardier Service Bulletin 601–0590 has been accomplished. CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5301 through 5665 inclusive. 30–11–00–101 and 30–11–00–102 ...... Bombardier Challenger 601 Time Limits/Maintenance Checks, PSP 601–5, Revision 38, dated June 19, 2009. 30–11–00–101 and 30–11–00–102 ...... Bombardier Challenger 601 Time Limits/Maintenance Checks, PSP 601A–5, Revision 34, dated June 19, 2009. 30–11–00–101 and 36–21–00–101 ...... CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5701 and subsequent. srobinson on DSKHWCL6B1PROD with PROPOSALS For Bombardier, Inc. model— 30–11–00–101 and 36–21–00–101 ...... Bombardier Challenger 604 Time Limits/Maintenance Checks, CH 604 TLMC, Revision 13, dated August 12, 2009. Bombardier Challenger 605 Time Limits/Maintenance Checks, CH 605 TLMC, Revision 1, dated August 12, 2009. (h) For all tasks identified in paragraph (g) of this AD, the initial compliance times for VerDate Mar<15>2010 16:45 Jan 04, 2011 Jkt 223001 those tasks are within the applicable times specified in table 2 of this AD. PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 E:\FR\FM\05JAP1.SGM 05JAP1 480 Federal Register / Vol. 76, No. 3 / Wednesday, January 5, 2011 / Proposed Rules TABLE 2—INITIAL COMPLIANCE TIMES FOR AIRWORTHINESS LIMITATIONS TASKS Bombardier, Inc. model— Task(s)— CL–600–2A12 (CL–601) airplanes, serial numbers 3001 through 3066 inclusive; and CL– 600–2B16 (CL–601–3A and CL–601–3R Variants) airplanes, serial numbers 5001 through 5194 inclusive; on which Bombardier Service Bulletin 601–0590 has been accomplished. CL–600–2A12 (CL–601) airplanes, serial numbers 3001 through 3066 inclusive; and CL– 600–2B16 (CL–601–3A and CL–601–3R Variants) airplanes, serial numbers 5001 through 5194 inclusive; on which Bombardier Service Bulletin 601–0590 has been accomplished. CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5301 through 5665 inclusive. 30–11–00–101 ........... Prior to the accumulation of 4,800 total flight hours; or within 4,800 flight hours after accomplishing Task 30–11–06–204 in Section 5–20–15 of the applicable Time Limits/ Maintenance Checks manual; whichever occurs later. Within 240 flight hours after the effective date of this AD. 30–11–00–102 ........... Prior to the accumulation of 4,800 total flight hours; or within 4,800 flight hours after accomplishing Task 30–13–00–205 in Section 5–20–15 of the applicable Time Limits/ Maintenance Checks manual; whichever occurs later. Within 240 flight hours after the effective date of this AD. 30–11–00–101 and 36–21–00–101. Within 320 flight hours after the effective date of this AD. CL–600–2B16 (CL–604 Variants) airplanes, serial numbers 5701 and subsequent. 30–11–00–101 and 36–21–00–101. Prior to the accumulation of 6,400 total flight hours; except for airplanes having 6,400 total flight hours or more as of the effective date of this AD on which the task has not been accomplished: Prior to the next scheduled 6,400 flight hour task inspection or prior to the next scheduled accomplishment of Task 57–10–00–208 in the applicable Time Limits/Maintenance Checks manual, whichever occurs first. Prior to the accumulation of 6,400 total flight hours. (i) After accomplishing the actions required by paragraph (g) of this AD, no alternative tasks or task intervals may be used unless the tasks or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (j)(1) of this AD. agent). You are required to assure the product is airworthy before it is returned to service. (3) Reporting Requirements: A Federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120–0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave., SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES–200. FAA AD Differences srobinson on DSKHWCL6B1PROD with PROPOSALS Note 2: This AD differs from the MCAI and/or service information as follows: No differences. Other FAA AD Provisions (j) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office, ANE–170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone 516–228–7300; fax 516– 794–5531. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAAapproved if they are approved by the State of Design Authority (or their delegated VerDate Mar<15>2010 16:45 Jan 04, 2011 Jkt 223001 Initial compliance time (whichever occurs later)— Related Information (k) Refer to MCAI Canadian Airworthiness Directive CF–2009–49R1, dated January 21, 2010, and the service information specified in Table 1 of this AD for related information. Issued in Renton, Washington, on December 27, 2010. Jeffrey E. Duven, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010–33329 Filed 1–4–11; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 Within 320 flight hours after the effective date of this AD. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–1306; Directorate Identifier 2010–NM–112–AD] RIN 2120–AA64 Airworthiness Directives; DassaultAviation Model FALCON 7X Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: SUMMARY: A design review has revealed a potential dormant failure of the Ram Air Turbine (RAT) heating system. If this failure occurs, it could lead to the freezing of the RAT mechanism and the consequent nondeployment of the RAT when needed. * * * * * Non-deployment of the RAT could result in insufficient electrical power to operate the fly-by-wire system, and E:\FR\FM\05JAP1.SGM 05JAP1

Agencies

[Federal Register Volume 76, Number 3 (Wednesday, January 5, 2011)]
[Proposed Rules]
[Pages 477-480]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-33329]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1307; Directorate Identifier 2010-NM-049-AD]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-
601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above. This proposed AD results from mandatory 
continuing airworthiness information (MCAI) originated by an aviation 
authority of another country to identify and correct an unsafe 
condition on an aviation product. The MCAI describes the unsafe 
condition as

    :During flight-testing of a wing anti-ice piccolo tube 
containing a deliberate small breach, it was determined that the 
wing leading edge thermal switches were not detecting the consequent 
bleed leak at the design threshold. As a result, new Airworthiness 
Limitation tasks, consisting of a functional test of the wing 
leading edge thermal switches and an inspection of the wing anti-ice 
duct piccolo tubes, have been introduced in order to limit exposure 
to dormant failure of the switches in the event of piccolo tube 
failure, which could potentially compromise the structural integrity 
of the wing leading edge and the effectiveness of the wing anti-ice 
system.

The proposed AD would require actions that are intended to address the 
unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by February 22, 
2011.

ADDRESSES: You may send comments 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 proposed AD, contact 
Bombardier,

[[Page 478]]

Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, 
Canada; telephone 514-855-5000; fax 514-855-7401; e-mail 
thd.crj@aero.bombardier.com; Internet https://www.bombardier.com. You 
may review copies of the referenced service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington. 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; or in person at the Docket Operations office 
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: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7318; fax (516) 794-5531.

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-2010-1307; 
Directorate Identifier 2010-NM-049-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

    Transport Canada Civil Aviation, which is the aviation authority 
for Canada, has issued Canadian Airworthiness Directive CF-2009-49R1, 
dated January 21, 2010 (referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    During flight-testing of a wing anti-ice piccolo tube containing 
a deliberate small breach, it was determined that the wing leading 
edge thermal switches were not detecting the consequent bleed leak 
at the design threshold. As a result, new Airworthiness Limitation 
tasks, consisting of a functional test of the wing leading edge 
thermal switches and an inspection of the wing anti-ice duct piccolo 
tubes, have been introduced in order to limit exposure to dormant 
failure of the switches in the event of piccolo tube failure, which 
could potentially compromise the structural integrity of the wing 
leading edge and the effectiveness of the wing anti-ice system. This 
directive mandates the revision of the approved maintenance schedule 
to include these new tasks, including phase-in schedules.
    This revision clarifies the applicability of the directive for 
CL-600-2A12 aircraft, serial numbers 3001 through 3066, and for CL-
600-2B16 aircraft, serial numbers 5001 through 5194. The directive 
is only applicable to these aircraft if Bombardier Service Bulletin 
(SB) 601-0590 [Scheduled Maintenance Instructions (MSG-3) Derived--
Qualification] has been incorporated. There is no change required to 
the approved maintenance schedule if SB 601-0590 has not been 
incorporated.

You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    Bombardier has issued the following service information:
     Challenger 601 Time Limits/Maintenance Checks, PSP 601-5, 
Revision 38, dated June 19, 2009.
     Challenger 601 Time Limits/Maintenance Checks, PSP 601A-5, 
Revision 34, dated June 19, 2009.
     Challenger 604 Time Limits/Maintenance Checks, CH 604 
TLMC, Revision 13, dated August 12, 2009.
     Challenger 605 Time Limits/Maintenance Checks, CH 605 
TLMC, Revision 1, dated August 12, 2009.

The actions described in this service information are intended to 
correct the unsafe condition identified in the MCAI.

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 design.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a Note within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 103 products of U.S. registry. We also estimate that 
it would take about 1 work-hour per product to comply with the basic 
requirements of this proposed AD. The average labor rate is $85 per 
work-hour. Based on these figures, we estimate the cost of the proposed 
AD on U.S. operators to be $8,755, or $85 per product.

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

[[Page 479]]

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); 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

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, 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.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2010-1307; Directorate Identifier 
2010-NM-049-AD.

Comments Due Date

    (a) We must receive comments by February 22, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the airplanes identified in paragraphs 
(c)(1), (c)(2), (c)(3), and (c)(4) of this AD; certificated in any 
category.
    (1) Bombardier, Inc. Model CL-600-2A12 (CL-601) airplanes, 
serial numbers 3001 through 3066 inclusive on which Bombardier 
Service Bulletin 601-0590 has been accomplished.
    (2) Bombardier, Inc. CL-600-2B16 (CL-601-3A and CL-601-3R 
Variants) airplanes, serial numbers 5001 through 5194 inclusive on 
which Bombardier Service Bulletin 601-0590 has been accomplished.
    (3) Bombardier, Inc. CL-600-2B16 (CL-604 Variants) airplanes, 
serial numbers 5301 through 5665 inclusive.
    (4) Bombardier, Inc. CL-600-2B16 (CL-604 Variants) airplanes, 
serial numbers 5701 and subsequent.

    Note 1: This AD requires revisions to certain operator 
maintenance documents to include new inspections. Compliance with 
these inspections is required by 14 CFR 91.403(c). For airplanes 
that have been previously modified, altered, or repaired in the 
areas addressed by these inspections, the operator may not be able 
to accomplish the inspections described in the revisions. In this 
situation, to comply with 14 CFR 91.403(c), the operator must 
request approval for an alternative method of compliance according 
to paragraph (j) of this AD. The request should include a 
description of changes to the required inspections that will ensure 
the continued operational safety of the airplane.

Subject

    (d) Air Transport Association (ATA) of America Codes 30 and 36: 
Ice and Rain Protection and Pneumatic, respectively.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    During flight-testing of a wing anti-ice piccolo tube containing 
a deliberate small breach, it was determined that the wing leading 
edge thermal switches were not detecting the consequent bleed leak 
at the design threshold. As a result, new Airworthiness Limitation 
tasks, consisting of a functional test of the wing leading edge 
thermal switches and an inspection of the wing anti-ice duct piccolo 
tubes, have been introduced in order to limit exposure to dormant 
failure of the switches in the event of piccolo tube failure, which 
could potentially compromise the structural integrity of the wing 
leading edge and the effectiveness of the wing anti-ice system.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Actions

    (g) Within 30 days after the effective date of this AD: Revise 
the Airworthiness Limitations Section of the Instructions for 
Continued Airworthiness by incorporating the applicable tasks 
identified in table 1 of this AD.

                Table 1--Airworthiness Limitations Tasks
------------------------------------------------------------------------
                                   Incorporate
 For Bombardier, Inc. model--       task(s)--         Identified in--
------------------------------------------------------------------------
CL-600-2A12 (CL-601)            30-11-00-101 and   Bombardier Challenger
 airplanes, serial numbers       30-11-00-102.      601 Time Limits/
 3001 through 3066 inclusive                        Maintenance Checks,
 on which Bombardier Service                        PSP 601-5, Revision
 Bulletin 601-0590 has been                         38, dated June 19,
 accomplished.                                      2009.
CL-600-2B16 (CL-601-3A and CL-  30-11-00-101 and   Bombardier Challenger
 601-3R Variants) airplanes,     30-11-00-102.      601 Time Limits/
 serial numbers 5001 through                        Maintenance Checks,
 5194 inclusive on which                            PSP 601A-5, Revision
 Bombardier Service Bulletin                        34, dated June 19,
 601-0590 has been                                  2009.
 accomplished.
CL-600-2B16 (CL-604 Variants)   30-11-00-101 and   Bombardier Challenger
 airplanes, serial numbers       36-21-00-101.      604 Time Limits/
 5301 through 5665 inclusive.                       Maintenance Checks,
                                                    CH 604 TLMC,
                                                    Revision 13, dated
                                                    August 12, 2009.
CL-600-2B16 (CL-604 Variants)   30-11-00-101 and   Bombardier Challenger
 airplanes, serial numbers       36-21-00-101.      605 Time Limits/
 5701 and subsequent.                               Maintenance Checks,
                                                    CH 605 TLMC,
                                                    Revision 1, dated
                                                    August 12, 2009.
------------------------------------------------------------------------

    (h) For all tasks identified in paragraph (g) of this AD, the 
initial compliance times for those tasks are within the applicable 
times specified in table 2 of this AD.

[[Page 480]]



                      Table 2--Initial Compliance Times for Airworthiness Limitations Tasks
----------------------------------------------------------------------------------------------------------------
 
----------------------------------------------------------------------------------------------------------------
Bombardier, Inc. model--             Task(s)--                Initial compliance time (whichever occurs later)--
----------------------------------------------------------------------------------------------------------------
CL-600-2A12 (CL-601) airplanes,      30-11-00-101..........  Prior to the accumulation    Within 240 flight
 serial numbers 3001 through 3066                             of 4,800 total flight        hours after the
 inclusive; and CL-600-2B16 (CL-601-                          hours; or within 4,800       effective date of
 3A and CL-601-3R Variants)                                   flight hours after           this AD.
 airplanes, serial numbers 5001                               accomplishing Task 30-11-
 through 5194 inclusive; on which                             06-204 in Section 5-20-15
 Bombardier Service Bulletin 601-                             of the applicable Time
 0590 has been accomplished.                                  Limits/Maintenance Checks
                                                              manual; whichever occurs
                                                              later.
CL-600-2A12 (CL-601) airplanes,      30-11-00-102..........  Prior to the accumulation    Within 240 flight
 serial numbers 3001 through 3066                             of 4,800 total flight        hours after the
 inclusive; and CL-600-2B16 (CL-601-                          hours; or within 4,800       effective date of
 3A and CL-601-3R Variants)                                   flight hours after           this AD.
 airplanes, serial numbers 5001                               accomplishing Task 30-13-
 through 5194 inclusive; on which                             00-205 in Section 5-20-15
 Bombardier Service Bulletin 601-                             of the applicable Time
 0590 has been accomplished.                                  Limits/Maintenance Checks
                                                              manual; whichever occurs
                                                              later.
CL-600-2B16 (CL-604 Variants)        30-11-00-101 and 36-21- Prior to the accumulation    Within 320 flight
 airplanes, serial numbers 5301       00-101.                 of 6,400 total flight        hours after the
 through 5665 inclusive.                                      hours; except for            effective date of
                                                              airplanes having 6,400       this AD.
                                                              total flight hours or more
                                                              as of the effective date
                                                              of this AD on which the
                                                              task has not been
                                                              accomplished: Prior to the
                                                              next scheduled 6,400
                                                              flight hour task
                                                              inspection or prior to the
                                                              next scheduled
                                                              accomplishment of Task 57-
                                                              10-00-208 in the
                                                              applicable Time Limits/
                                                              Maintenance Checks manual,
                                                              whichever occurs first.
CL-600-2B16 (CL-604 Variants)        30-11-00-101 and 36-21- Prior to the accumulation    Within 320 flight
 airplanes, serial numbers 5701 and   00-101.                 of 6,400 total flight        hours after the
 subsequent.                                                  hours.                       effective date of
                                                                                           this AD.
----------------------------------------------------------------------------------------------------------------

    (i) After accomplishing the actions required by paragraph (g) of 
this AD, no alternative tasks or task intervals may be used unless 
the tasks or intervals are approved as an alternative method of 
compliance (AMOC) in accordance with the procedures specified in 
paragraph (j)(1) of this AD.

FAA AD Differences

    Note 2:  This AD differs from the MCAI and/or service 
information as follows: No differences.

Other FAA AD Provisions

    (j) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office, ANE-170, FAA, has the authority 
to approve AMOCs for this AD, if requested using the procedures 
found in 14 CFR 39.19. Send information to ATTN: Program Manager, 
Continuing Operational Safety, FAA, New York ACO, 1600 Stewart 
Avenue, Suite 410, Westbury, New York 11590; telephone 516-228-7300; 
fax 516-794-5531. Before using any approved AMOC on any airplane to 
which the AMOC applies, notify your principal maintenance inspector 
(PMI) or principal avionics inspector (PAI), as appropriate, or 
lacking a principal inspector, your local Flight Standards District 
Office. The AMOC approval letter must specifically reference this 
AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.
    (3) Reporting Requirements: A Federal agency may not conduct or 
sponsor, and a person is not required to respond to, nor shall a 
person be subject to a penalty for failure to comply with a 
collection of information subject to the requirements of the 
Paperwork Reduction Act unless that collection of information 
displays a current valid OMB Control Number. The OMB Control Number 
for this information collection is 2120-0056. Public reporting for 
this collection of information is estimated to be approximately 5 
minutes per response, including the time for reviewing instructions, 
completing and reviewing the collection of information. All 
responses to this collection of information are mandatory. Comments 
concerning the accuracy of this burden and suggestions for reducing 
the burden should be directed to the FAA at: 800 Independence Ave., 
SW., Washington, DC 20591, Attn: Information Collection Clearance 
Officer, AES-200.

Related Information

    (k) Refer to MCAI Canadian Airworthiness Directive CF-2009-49R1, 
dated January 21, 2010, and the service information specified in 
Table 1 of this AD for related information.

    Issued in Renton, Washington, on December 27, 2010.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-33329 Filed 1-4-11; 8:45 am]
BILLING CODE 4910-13-P
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