Federal Register #2026-13655

FAA Airworthiness Directive for Airbus Canada BD5001A10 and BD5001A11 Aircraft

This regulatory action from the Federal Aviation Administration (FAA) addresses a critical safety issue for specific commercial aircraft models: - Government Buyer: - Department of Transportation (DOT) - Federal Aviation Administration (FAA), Aircraft Certification Service - OEMs Involved: - Airbus Canada Limited Partnership (formerly Bombardier, Inc. and C Series Aircraft Limited Partnership) - Aircraft Models Affected: - BD5001A10 - BD5001A11 - Issue Addressed: - Missing or broken high pressure valve (HPV) butterfly clips - Potential consequences include bleed system isolation failure, hot air leakage, and structural integrity degradation - Regulatory Requirements: - Prohibits dispatching affected airplanes under certain minimum equipment list (MEL) provisions - Prohibits dispatch if specific crew alerting system (CAS) messages are displayed - Operators must inspect and/or replace HPV butterfly clips as necessary - Notable Details: - No procurement of products or services is being solicited; this is a mandatory safety directive for operators - Approximately 211 U.S. airplanes are affected - The directive is effective for a defined period, with related enforcement discretion on airline refund regulations

Description

This final rule airworthiness directive (AD) applies to all Airbus Canada Limited Partnership Model BD5001A10 and BD5001A11 airplanes. It addresses an unsafe condition caused by missing or broken high pressure valve (HPV) butterfly clips, which may lead to bleed leaks, overheat conditions, and degradation of valve sealing function. The AD prohibits dispatching airplanes under certain minimum equipment list (MEL) provisions and if specific crew alerting system (CAS) messages are displayed. The AD is effective July 7, 2026, and comments are invited until August 21, 2026.

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