FAA Mandates Fire Sleeve Fixes After Duct Test Failures
Published Date: 5/27/2026
Rule
Summary
The FAA is making new safety rules for Airbus Canada planes (models BD-500-1A10 and BD-500-1A11) because some air ducts failed fire safety tests. Starting July 1, 2026, airlines must inspect these ducts, add fire-resistant sleeves if needed, and update ceiling panels. This keeps passengers safe and stops unsafe parts from being used again, with inspections and fixes happening soon to avoid bigger costs later.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 3 costs, 0 mixed.
Operators must inspect and fix ECS ducts
If you operate Airbus Canada Model BD-500-1A10 or BD-500-1A11 airplanes, you must inspect the environmental control system (ECS) ducts, install a fire‑resistant sleeve over any non‑compliant duct, and re‑identify ceiling panel liners. The AD is effective July 1, 2026, and requires compliance by the later of: (i) prior to accumulating 9,350 total flight hours or within 60 months after July 1, 2026, whichever occurs first, or (ii) within 30 days after July 1, 2026.
Estimated U.S. fleet and cost numbers
The FAA estimates this AD affects 200 airplanes on the U.S. registry. The FAA estimates a cost per airplane for the required actions of $1,020 (12 work‑hours at $85/hour) and an estimated cost on U.S. operators of $11,220 based on 11 airplanes expected to need the required inspection and re‑identification. On‑condition retrofit (if needed) is estimated at $5,010 per airplane (2 work‑hours at $85/hour plus $4,840 parts).
Replacement ECS ducts restricted
The AD prohibits installing ECS ducts as replacement parts under certain conditions specified in Transport Canada AD CF-2025-10. This means maintenance and parts managers cannot put certain ECS ducts back into service as replacements unless they meet the AD conditions.
Small entities not materially affected
The FAA identified three air carriers and one commercial aircraft lessor that will be affected by this AD and determined all four are large businesses under SBA size standards. The FAA certified the AD will not have a significant economic impact on a substantial number of small entities.
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