EASA AD 2022-0071
Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment
Summary
EASA Airworthiness Directive 2022-0071 is an amendment addressing time limits and maintenance checks for CFM International LEAP-1B engines installed on Boeing 737-8, 737-8200, and 737-9 aircraft. It updates the Airworthiness Limitations Section (ALS) in the LEAP-1B Engine Shop Manual, specifying mandatory life limits and maintenance tasks for critical engine parts. This directive ensures continued airworthiness by mandating compliance with revised maintenance requirements.
What Changed
EASA Airworthiness Directive 2022-0071 supersedes the previous AD 2020-0055 and introduces new and more restrictive life limits and maintenance tasks for certain LEAP-1B engine components. It incorporates updated data from the ALS and CFM Service Bulletin 72-0342, reflecting findings of subsurface anomalies in critical parts that reduce their life capability. The directive mandates replacement of affected parts before exceeding revised life limits and adherence to updated maintenance intervals.
Why It Matters
This directive is critical for aviation professionals as it addresses potential unsafe conditions caused by manufacturing anomalies in LEAP-1B engine parts, which could lead to part failure and damage to the aircraft. Operators, maintenance organizations, and compliance teams must update their maintenance programs to incorporate these new life limits and tasks to ensure engine reliability and regulatory compliance. Failure to comply could result in unsafe operations and regulatory penalties.
What To Do
Affected operators must replace specified engine components before exceeding the new life limits and perform all maintenance tasks within the updated intervals as defined in the ALS and SB 72-0342. The approved Aircraft Maintenance Programme (AMP) must be revised within 12 months of the effective date to include these changes. Any discrepancies found during maintenance must be corrected per CFM instructions before the next flight, and alternative compliance methods may be requested from EASA if necessary.
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