EASA AD CF-2022-54R1
Fuselage — Forward Engine Support Frame Fuselage Station 1051.30 — Inspection
Summary
Airworthiness Directive CF-2022-54R1 addresses inspection requirements for the forward engine support frame at fuselage station 1051.30 on MHI RJ Aviation ULC aircraft models CL-600-2C10, CL-600-2C11, CL-600-2D15, and CL-600-2D24. It mandates improved inspection procedures for tombstone fittings part numbers MM670-36153/36154 and MM690-36153/36154 to detect cracks that could compromise engine attachment. This directive updates previous inspection protocols to enhance safety and compliance.
What Changed
CF-2022-54R1 corrects a typographical error found in the Maintenance Requirements Manual reference in the original AD CF-2022-54. It maintains the requirement to use a new ultrasonic sub-surface inspection procedure alongside the existing special detailed inspection to better detect cracks in the tombstone fitting lugs. The revision ensures clarity and accuracy in compliance documentation without changing the core inspection requirements.
Why It Matters
This directive is critical for operators and maintenance teams because undetected cracks in the tombstone fitting lugs could lead to engine detachment from the airframe, posing serious safety risks. The updated inspection procedures improve the likelihood of early crack detection, thereby preventing potential structural failures. Compliance ensures continued airworthiness and regulatory adherence for affected aircraft models.
What To Do
Operators must inspect the tombstone fittings using the specified ultrasonic and surface inspection procedures as outlined in ALI Task 53-61-121. Aircraft not previously inspected must comply within the intervals specified in the Maintenance Requirements Manual. Aircraft previously inspected only with the older procedure must be reinspected using the new ultrasonic method within two years of the directive's effective date, 18 October 2022.
Your fleet's weekly compliance brief
AI-summarized regulatory changes, compliance deadlines, and action items — filtered to your aircraft, every Monday.
AI-generated summary from official EASA source document. Always verify against the original.