Airworthiness Directive · Amendment 39-21682 · Engines
Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
This AD applies to Airbus Canada Limited Partnership (type certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada Civil Aviation (TCCA) AD CF-2020-41, issued October 15, 2020 (TCCA AD CF-2020-41).
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This AD was prompted by reports of in-flight engine shutdowns (IFESs); investigation results indicated that this could be caused by high altitude climbs at higher thrust settings on engines with certain thrust ratings. This AD requires amending the existing airplane flight manual (AFM) to incorporate a new limitation and revise certain normal procedures, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is incorporated by reference. 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, paragraph A., of TCCA AD CF-2020-41.
(1) Where TCCA AD CF-2020-41 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where paragraph A. of TCCA AD CF-2020-41 requires amending the existing airplane flight manual (AFM) by “incorporating the SUPPLEMENT 21 Operation above 29000 feet from AFM Revision 15-A dated 10 September 2020,” this AD requires amending the existing AFM by incorporating Supplement 21—Operation Above 29000 Feet, of Airbus A220-100 Airplane Flight Manual, Publication BD500-3AB48-22200-00, and Airbus A220-300 Airplane Flight Manual Publication BD500-3AB48-32200-00, both Issue 016, dated October 16, 2020.
(3) Where paragraph A. of TCCA AD CF-2020-41 specifies to “[i]nform all flight crews of the new supplement and thereafter operate the aeroplane accordingly,” this AD does not require those actions as those actions are already required by existing FAA operating regulations.
(4) Where paragraphs B. and C. of TCCA AD CF-2020-41 specify procedures for a borescope inspection for signs of damage of the 1st stage axial low-pressure compressor (LPC) rotor of each engine, to be performed after the AFM N1 limitation has been exceeded, this AD does not require that action.
(5) Where paragraph C. of TCCA AD CF-2020-41 describes an optional installation of health management unit reports to monitor N1 exceedances, this AD does not include that option.
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.
