Engine — Bearing Spring Finger Housing — Inspection
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of LEAP-1B engines must begin monitoring oil filter delta pressure within 50 flight cycles after 8 November 2022 or between 75 and 125 flight cycles since first installation, whichever is later, and continue at intervals not exceeding 100 flight cycles. If any discrepancies are found, corrective actions must be taken promptly as per the service bulletin. Affected parts must be replaced during qualified shop visits, and installation of affected parts is prohibited from the effective date.
Summary
EASA Airworthiness Directive 2022-0215 is an airworthiness directive addressing CFM International LEAP-1B engine models installed on Boeing 737-8, 737-8200, and 737-9 aircraft. It mandates inspection and monitoring of the bearing No. 3 spring finger housing to detect wear that could cause non-synchronous vibrations and potential engine failure. The directive applies to all serial numbers of affected LEAP-1B engines and prohibits installation of certain affected parts.
What changed
This new airworthiness directive introduces mandatory monitoring of oil filter delta pressure to detect early signs of wear in bearing spring finger housings on LEAP-1B engines. It requires repetitive inspections, corrective actions if discrepancies are found, and replacement of affected parts during qualified shop visits. Additionally, it prohibits installation of affected parts on any engine from the effective date.
Why it matters
This directive is critical for aviation professionals as it addresses a safety risk that could lead to engine in-flight shutdown due to compressor stall caused by worn bearing spring finger housings. Operators and maintenance organizations must implement the inspection and replacement requirements to ensure continued airworthiness and prevent potential loss of aircraft control. Compliance ensures regulatory adherence and enhances flight safety.
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New ADs and bulletins for CFM International LEAP-1B, Boeing 737-8, Boeing 737-8200 and Boeing 737-9, summarized like this page, every Monday.