Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
Published Date: 11/25/2025
Rule
Summary
If you fly or work with Airbus Canada Model BD-500-1A10 or BD-500-1A11 planes, listen up! The FAA says some fire safety bottles might not work right, so they’re making owners replace certain parts and check fire extinguisher lines to keep everyone safe. These fixes start December 30, 2025, and help avoid costly problems down the runway.
Analyzed Economic Effects
3 provisions identified: 2 benefits, 1 costs, 0 mixed.
Operators face one-time compliance costs
The FAA estimates this AD affects 74 U.S.-registered airplanes and becomes effective December 30, 2025. Estimated cost for the required actions is 16 work-hours at $85/hour = $1,360 per airplane (parts $0), totaling $100,640 for U.S. operators; on-condition work can cost up to $18,218 per product (labor $850 plus parts up to $17,368). The manufacturer may cover some or all costs under warranty.
Mandatory fire-suppression fixes
If you operate or maintain Airbus Canada Model BD-500-1A10 or BD-500-1A11 airplanes, you must replace affected low rate discharge (LRD) bottles, inspect extinguishing discharge lines and tubes, and replace lines/tubes as needed. The AD prohibits installing affected LRD bottles (part numbers 475086-1, 475124-1, or 475087-1 with specified serial numbers unless the bottle is marked with an encircled 'C') and is effective December 30, 2025. The rule addresses depletion of extinguishing agent caused by a loose metering device that caused cargo bottle fail cautions and diversions.
Reporting requirement removed
Although the Transport Canada AD referenced in this rule asks operators to submit certain information to the manufacturer, this FAA AD does not require submitting that information. This change is effective December 30, 2025.
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