Exhaust — Non-Conforming Thrust Reverser Actuation System Deploy Hoses
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft must remove and replace the non-conforming thrust reverser actuation system deploy hoses following the instructions in Service Bulletin BD500-783002. This corrective action must be completed within 400 flight hours from the effective date of December 22, 2021, unless already accomplished. Contact Transport Canada for further guidance if needed.
Summary
Canadian Airworthiness Directive CF-2021-46 addresses an issue with non-conforming thrust reverser actuation system deploy hoses on certain Airbus Canada Limited Partnership aircraft models BD-500-1A10 and BD-500-1A11. The directive mandates replacement of these specific deploy hoses to ensure safe operation of the thrust reverser system. This AD applies to serial numbers 50030, 50033 through 50039 of the BD-500-1A10 and serial number 55056 of the BD-500-1A11.
What changed
CF-2021-46 introduces a mandatory requirement to remove and replace non-conforming thrust reverser actuation system deploy hoses identified by the manufacturer. This action is based on findings that some hoses were improperly manufactured with incomplete wire overbraid installation, leading to potential failure. The directive enforces compliance with Airbus Canada Limited Partnership Service Bulletin BD500-783002 to address this issue.
Why it matters
This directive is critical for aviation professionals because failure of the deploy hose can result in loss of thrust reverser function and hydraulic systems, increasing the risk of runway excursions during landing, especially on contaminated runways. Operators and maintenance organizations must ensure compliance to maintain aircraft safety and regulatory conformity. It also helps prevent in-service failures that could lead to costly repairs and operational disruptions.
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