Federal Register #2026-18746

FAA Proposed Airworthiness Directive for Bombardier BD-100-1A10: Mandatory Flight Manual Revision

The Federal Aviation Administration (FAA), under the Department of Transportation, is proposing a new airworthiness directive (AD) for Bombardier BD-100-1A10 airplanes. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - OEM Highlight: - Bombardier, Inc. is the sole Original Equipment Manufacturer (OEM) referenced - Requirement Overview: - The AD is prompted by reports of pitch upset after autopilot disconnect, with EICAS messages indicating the autopilot was holding significant nose up or nose down elevator forces - Requires revising the Airplane Flight Manual (AFM) to change the AP STAB TRIM FAIL (C) procedure from a non-normal to an emergency procedure - Mandates flightcrew adherence to new emergency procedures to stabilize airspeed in certain conditions - Incorporates Transport Canada AD CF-2025-42 by reference - Products/Services Requested: - No physical products, part numbers, or purchase quantities are specified - The requirement is for a procedural revision and compliance with updated emergency procedures - Unique Requirements: - Mandatory AFM revision for all affected aircraft - Immediate implementation of new emergency procedures for flightcrew

Description

The FAA proposes a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD is prompted by reports of pitch upset upon autopilot disconnect following engine indication and crew alerting system (EICAS) messages indicating significant nose up or nose down forces on the elevator. The proposed AD requires revising the airplane flight manual (AFM) to change the procedure for the AP STAB TRIM FAIL (C) advisory message from a non-normal to an emergency procedure, providing flightcrew with emergency procedures to stabilize airspeed. Comments on the proposed AD are due by October 29, 2026.

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