Airworthiness directives › 2023-23-05
AD 2023-23-05 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-100-1A10. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20936 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 60 days after the effective date of this AD, revise the Emergency Procedures in Section 03-35, and the Normal Procedures in Section 04-02, of the existing AFM to include the information specified in the service information identified in paragraph (g)(1) or (2), as applicable. (1) Bombardier Challenger 300 Temporary Revision TR-94-1, to Airplane Flight Manual (AFM) CSP 100-1, dated February 6, 2023; or Bombardier Challenger 300 Temporary Revision TR-94-1, to AFM CSP 100-1 (Metric), dated February 6, 2023. (2) Bombardier Challenger 350 Temporary Revision TR-25-1, to AFM CH 350, dated February 6, 2023; or page 03-35-1, in checklist “Takeoff Configuration Warnings,” of Chapter 3, “Emergency Procedures,” and page 04-02-10, in checklist “Before Starting Engines,” of Chapter 4, “Normal Procedures,” of the Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38, dated May 11, 2023. Note 1 to paragraph (g)(2): For obtaining the checklists for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use Document Identification No. CH 350 AFM.
Unsafe condition
This AD was prompted by a design review of the avionic architecture of the pitch trim indication and alerting system that revealed software errors could generate misleading pitch trim indication to the crew, leading to incorrect horizontal stabilizer positioning at takeoff. The FAA is issuing this AD to ensure the horizontal stabilizer is correctly configured prior to takeoff. The unsafe condition, if not addressed, could result in an extreme pitch oscillation and subsequent loss of control of the airplane and serious injury to passengers.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1