Airworthiness Directive · Amendment 39-13743 · Bombardier Model DHC-8-101, -102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
Bombardier Model DHC-8-101, -102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
Model DHC-8-101, -102, -103, -106, -201, -202, -301, -311, and -315 airplanes, serial number 003 through 585 inclusive; certificated in any category; with auxiliary power unit (APU) installation per Standard Option Only (S.O.O.) 8155 or Change Request (CR) 849SO08155.
This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-101, -102, -103, -106, - 201, -202, -301, -311, and -315 airplanes. This amendment requires an inspection of the fuel tube assembly of the auxiliary power unit (APU) for clearance from adjacent components; and an inspection of the fuel tube assembly and the bleed air duct shroud for discrepancies (insufficient clearance, nicks, dents, chafing, or other damage); and related investigative and corrective actions if necessary. This amendment also requires relocation of certain support clamps on the APU fuel tube assembly. This action is necessary to prevent a fuel leak caused by chafing of the APU fuel tube assembly, which could result in fire in the center wing area. This action is intended to address the identified unsafe condition.
To prevent a fuel leak caused by chafing of the APU fuel tube assembly, which could result in fire in the center wing area, accomplish the following:
(a) Within 6 months after the effective date of this AD: Do a general visual inspection of the APU fuel tube assembly for discrepancies. The inspection includes examining the routing of the fuel tube assembly to ensure that the tube has sufficient clearance between the shroud of the bleed air duct and the gust lock cable; and inspecting the fuel tube assembly and the bleed air duct shroud for other discrepancies such as nicks, dents, chafing, or other damage. If the inspection shows no discrepancies, before further flight, relocate the clamps on the fuel tube assembly. If the inspection shows discrepancies, before further flight, do the applicable related investigative and corrective actions, and relocate the clamps on the fuel tube assembly. Accomplish all actions per the Accomplishment Instructions of Bombardier Service Bulletin 8-49-19, Revision A, dated July 7, 2003.
Note 1: For the purposes of this AD, a general visual inspection is defined as: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
(b) Actions accomplished before the effective date of this AD per Bombardier Service Bulletin 8-49-19, dated May 13, 2003, are considered acceptable for compliance with the corresponding action specified in this AD.
(c) In accordance with 14 CFR 39.19, the Manager, New York Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD.
(d) Unless otherwise specified in this AD, the actions shall be done in accordance with Bombardier Service Bulletin 8-49-19, Revision A, dated July 7, 2003. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Bombardier, Inc., Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New York; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Note 2: The subject of this AD is addressed in Canadian airworthiness directive CF-2003-22, dated September 3, 2003.
