Airworthiness Directive · Amendment 39-23098 · Fuel
Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
This AD applies to all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. This AD was prompted by a report of multiple in-service failures of engine feed check valves, which have resulted in fuel imbalance conditions in flight. This AD requires repetitive replacement of the left-and right-side engine feed check valves with new engine feed check valves and prohibits flight dispatch under certain conditions. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2024-20, dated June 5, 2024 (Transport Canada AD CF-2024-20).
(1) Where Transport Canada AD CF-2024-20 refers to its effective date or to the effective date of Transport Canada AD CF-2023-59, dated July 26, 2023, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2024-20 refers to hours air time, this AD requires using flight hours.
Accomplishing repetitive replacement of the engine isolation feed ejector check valve, P/N 2090199-101, as required by paragraph (g) of this AD is an acceptable means of complying with the repetitive on-condition inspection requirement of AD 2023-16-02 provided that all of the conditions in paragraphs (i)(1) through (3) of this AD are satisfied.
(1) Both the replacement and on-condition inspection required by paragraph (g) of this AD are accomplished concurrently at intervals not to exceed 3,000 flight hours after the most recent inspection performed in accordance with AD 2023-16-02.
(2) Only the check valve (P/N 2090199-101) that has been replaced as specified in paragraph (g) of this AD may be granted relief from the on-condition inspection and replacement requirements of AD 2023-16-02.
(3) All other applicable requirements of AD 2023-16-02 are complied with.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
