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2022-06-15 |
DE HAVILLAND AIRCRAFT OF CANADA LIMITED (TYPE CERTIFICATE
PREVIOUSLY HELD BY BOMBARDIER, INC.): Amendment 39-21981; Docket No. FAA-2021-1068; Project Identifier MCAI-2021-00383-T. |
(a) EFFECTIVE DATE This airworthiness directive (AD) is effective May 10, 2022. (b) AFFECTED ADS None. (c) APPLICABILITY This AD applies to all De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Model DHC-8-401 and -402 airplanes, certificated in any category. (d) SUBJECT Air Transport Association (ATA) of America Code 36, Pneumatic. (e) UNSAFE CONDITION This AD was prompted by reports of bleed air leaks in the wing box area and failure of the leak detection shroud. The FAA is issuing this AD to address the possibility of undetected hot engine bleed air being directed onto aircraft structure, the main landing gear (MLG) emergency release cable, and the static air temperature (SAT) sensor, which could cause the main landing gear emergency release cable to malfunction. (f) COMPLIANCE Comply with this AD within the compliance times specified, unless al- ready done. (g) REQUIRED ACTIONS Within 48 months or 8,000 flight hours, whichever occurs first, from the effective date of this AD: Remove the affected V-band coupling and check valve seals, do a visual inspection for damage to the coupling covers and surrounding area, and replace the coupling and seals with a redesigned assembly in accordance with the Accomplishment Instructions paragraph 3.B., of de Havilland Service Bulletin 84-36-06, dated Decem -ber 15, 2020. (1) If any damage to a coupling cover is found, replace the coupling cover before further flight in accordance with the Accomplishment Instruc- tions of de Havilland Service Bulletin 84-36-06, dated December 15, 2020. (2) If any damage to the surrounding area is found, before further flight, accomplish corrective actions in accordance with the procedures speci- fied in paragraph (i)(2) of this AD. (h) PARTS INSTALLATION PROHIBITION As of the effective date of this AD, no person may install a V-band coupling, part number (P/N) DSC361-250, or check valve seal, P/N MS35769-71, in the center wing front spar area of any airplane. (i) 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 responsible Flight Standards 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. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards 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. (j) RELATED INFORMATION (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) TCCA AD CF-2021-11, dated March 29, 2021, 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-2021- 1068. (2) For more information about this AD, contact Elizabeth Dowling, Aero- space Engineer, Mechanical Systems and Administrative Services Section FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov. (k) 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) De Havilland Aircraft of Canada Limited Service Bulletin 84-36-06, dated December 15, 2020. (ii) [Reserved] (3) For service information identified in this AD, contact De Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 123 Garratt Blvd., 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, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (4) You may view this service information at the FAA, Airworthiness Prod- ucts Section, Operational Safety 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 refer- ence at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email fr. inspection@nara.gov, or go to: https://www.archives.gov/federal- register/cfr/ibr-locations.html. Issued on March 10, 2022. Lance T. Gant, Director, Compliance & Airworthi- ness Division, Aircraft Certification Service. FOR FURTHER INFORMATION CONTACT: Elizabeth Dowling, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516- 228-7300; email 9-avs-nyaco-cos@faa.gov.
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DEPARTMENT OF TRANSPORTATION
The FAA estimates the following costs
to do any necessary coupling
The FAA has received no definitive
data on which to base the cost |