Airworthiness DirectiveEASA AD CF-2022-16R1

Pneumatic — Non-Conforming Bleed Air Leak Detection System Sensing Elements

Published: Jul 6, 2022
Effective: Jul 19, 2022
Replaces: 2022-16

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What to do

Operators of affected MHI RJ Aviation ULC aircraft must test bleed air leak detection system sensing elements within specified compliance times ranging from 18 to 48 months or corresponding flight hours from 21 April 2022. Non-serviceable sensing elements must be replaced before further flight, with deferred replacement allowed up to 10 days under strict conditions for Group 2 aircraft. Installation of non-conforming sensing elements as replacement parts is prohibited from 21 April 2022 onward.

Summary

Canadian Airworthiness Directive CF-2022-16R1 addresses non-conforming bleed air leak detection system sensing elements installed on MHI RJ Aviation ULC aircraft, including Bombardier CL-600-2B19, CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25 models. The directive mandates testing and replacement of sensing elements with insufficient salt fill that could fail to detect hot bleed air leaks, posing a safety risk. It references specific MHIRJ Service Bulletins SB 601R-36-021 and SB 670BA-36-025 for compliance procedures.

What changed

This revision, CF-2022-16R1, corrects the definition of affected parts and updates references to the latest revisions of MHIRJ Service Bulletins SB 601R-36-021 Revision D and SB 670BA-36-025 Revision C. It also clarifies compliance requirements and allows deferred replacement under specific conditions for Group 2 aircraft. The directive supersedes the original AD CF-2022-16 issued on 7 April 2022.

Why it matters

This directive is critical for aviation professionals to ensure the integrity of bleed air leak detection systems, which protect aircraft structures and systems from damage due to undetected hot bleed air leaks. Operators and maintenance organizations must comply to maintain airworthiness and prevent potential in-flight safety hazards. Understanding the updated testing, replacement, and deferred repair provisions is essential for effective maintenance planning and regulatory compliance.

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