Pneumatic — Non-Conforming Bleed Air Leak Detection System Sensing Elements
- Published
- Effective
- Deadline
- Replaces
- 2022-36
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must prohibit installation of non-serviceable sensing elements from 18 July 2022 onward. For Group A aeroplanes, testing and marking of affected sensing elements must be completed within 3500 flight hours or 120 months from 23 March 2023. Group B aeroplanes require maintenance record verification within 60 days of 18 July 2022 and testing if affected parts are found. Failed sensing elements must be replaced before further flight.
Summary
Canadian Airworthiness Directive CF-2023-18 addresses the pneumatic system on Bombardier Inc. model BD-700-2A12 aeroplanes, serial numbers 70005 and subsequent. It focuses on non-conforming bleed air leak detection system sensing elements that may have insufficient salt fill, potentially impairing hot bleed air leak detection. This directive mandates testing and replacement of affected sensing elements to ensure continued safe flight and landing.
What changed
AD CF-2023-18 supersedes AD CF-2022-36 and introduces mandatory incorporation of Bombardier's service bulletin 700-36-7503, which provides a test procedure for detecting insufficient salt fill in sensing elements and requires replacement of discrepant parts. It also updates compliance requirements by defining affected parts, groups of aeroplanes, and operational restrictions until corrective actions are completed.
Why it matters
This directive is critical for operators and maintenance organizations to prevent undetected hot bleed air leaks that could damage aircraft structures and systems, jeopardizing flight safety. Compliance ensures the reliability of the bleed air leak detection system, supports regulatory adherence, and minimizes operational disruptions caused by potential system failures.
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