Pneumatic — Non-Conforming Bleed Air Leak Detection System Sensing Elements
- Published
- Effective
- Deadline
- Replaces
- 2022-44
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must amend the AFM within 30 days of the effective date and inform flight crews of the changes. Affected sensing elements must not be installed as replacement parts from 24 August 2022 onward. Testing of sensing elements must be completed within 7500 flight cycles or 96 months from 28 February 2023, with non-serviceable parts replaced before further flight.
Summary
Canadian Airworthiness Directive CF-2023-09 addresses a safety issue in Bombardier Inc. model BD-100-1A10 (Challenger 300/350) aircraft related to non-conforming bleed air leak detection system sensing elements. These sensing elements may have insufficient salt fill, impairing the detection of hot bleed air leaks. The directive mandates revisions to the Airplane Flight Manual and testing or replacement of affected sensing elements to ensure continued safe flight.
What changed
AD CF-2023-09 supersedes AD CF-2022-44 and retains its requirements while updating the definition of affected parts. It mandates incorporation of revised AFM procedures and compliance with Bombardier Service Bulletins 100-36-10 and 350-36-003 for testing and replacing non-conforming sensing elements. The directive also cancels the temporary AFM revision introduced by the previous AD.
Why it matters
This directive is critical for operators and maintenance teams to prevent undetected hot bleed air leaks that could damage aircraft structures and systems, potentially compromising safe flight and landing. Compliance ensures that sensing elements are verified as serviceable or replaced, maintaining the integrity of the bleed air leak detection system. It also clarifies installation prohibitions and updates operational procedures for flight crews.
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