Airworthiness Directive · Amendment 39-22073 · Flight controls
Bombardier, Inc., Airplanes
This AD applies to all Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a report of multiple in-service events where, following a STAB TRIM FAULT advisory message and auto-pilot disconnect, flightcrew commands for a nose-up trim resulted in nose-down trim movement of the horizontal stabilizer instead. This AD requires revising the existing airplane flight manual (AFM) to provide the flightcrew with instructions for an expanded pre-flight check of the pitch trim, trim malfunction procedures, and revised "AP STAB TRIM FAIL" caution and "STAB TRIM FAULT" advisory procedures. The FAA is issuing this AD to address the unsafe condition on these products.
Within 14 days after the effective date of this AD, revise the Non-Normal Procedures chapter of the existing Airplane Flight Manual to include the information in the applicable temporary revision identified in paragraphs (g)(1) through (3) of this AD.
(1) Bombardier Challenger 300 Temporary Revision TR-92, dated December 20, 2021, to the Bombardier Challenger 300 AFM (Imperial Version).
(2) Bombardier Challenger 300 Temporary Revision TR-92, dated December 20, 2021, to the Bombardier Challenger 300 AFM (Metric Version).
(3) Bombardier Challenger 350 Temporary Revision TR-23, dated December 20, 2021, to the Bombardier Challenger 350 AFM.
Within 14 days after the effective date of this AD, revise the Normal Procedures chapter of the existing AFM to include the information for the “Before Starting Engines” checklist in Chapter 04—Normal Procedures, of the applicable AFM identified in paragraphs (h)(1) through (3) of this AD.
(1) Bombardier Challenger 300 AFM (Imperial Version), CSP 100-1, Revision 67, dated March 29, 2022.
Note 1 to paragraph (h)(1): For obtaining the Before Starting Engines checklist for Bombardier Challenger 300 AFM (Imperial Version), CSP 100-1, use Document Identification number CH 300 AFM-I.
(2) Bombardier Challenger 300 AFM (Metric Version), CSP 100-1 (METRIC), Revision 67, dated March 29, 2022.
Note 2 to paragraph (h)(2): For obtaining the Before Starting Engines checklist for Bombardier Challenger 300 AFM (Metric Version), CSP 100-1 (METRIC), use Document Identification number CH 300 AFM-M.
(3) Bombardier Challenger 350 AFM, CH 350, Revision 33, dated March 29, 2022.
