Engine - Low-Pressure Compressor Stage 1 Fan Blades - Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2019-25-13
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of aircraft with Engine Alliance GP7270 and GP7277 engines must perform initial ultrasonic inspections of the LPC 1st-stage fan blades by June 28, 2021, and continue with repetitive inspections as specified. Any fan blade failing inspection must be replaced before further flight. Stakeholders should review Engine Alliance Alert Service Bulletin EAGP7-A72-444 for detailed inspection procedures and maintain records of compliance.
Summary
The FAA Airworthiness Directive 2021-12-01 is a final rule addressing Engine Alliance GP7270 and GP7277 turbofan engines equipped with certain low-pressure compressor (LPC) 1st-stage fan blades. It mandates ultrasonic inspections and replacement of affected fan blades to prevent in-flight shutdown caused by blade fractures. This directive updates previous requirements to enhance safety by lowering inspection thresholds and requiring repetitive inspections.
What changed
This directive supersedes AD 2019-25-13 by lowering the initial inspection threshold and introducing repetitive ultrasonic inspections for the LPC 1st-stage fan blades. It incorporates new service information from Engine Alliance that specifies updated inspection procedures and intervals. The rule also clarifies compliance requirements to address fatigue cracks found in the fan blades.
Why it matters
This AD is critical for aviation professionals as it mitigates the risk of engine failure due to fractured LPC fan blades, which can lead to in-flight shutdowns. Operators and maintenance teams must adhere to the updated inspection intervals to ensure continued airworthiness and safety. Compliance helps prevent costly unscheduled maintenance and enhances operational reliability of affected engines.
More for Engine Alliance GP7200
All 14- EASA AD US-2026-20-12Turbine - High-Pressure Turbine Interstage Seal - ReplacementOct 12, 2026
- EASA AD US-2023-11-06Engine - High-Pressure Turbine Interstage Seals - ReplacementJun 12, 2023
- EASA AD US-2022-10-04Engine - Stages 7-9 Compressor Rotor Spool - ReplacementMay 9, 2022
- EASA AD US-2021-26-04Engine - Fan Hub Assembly - Inspection / ReplacementJan 3, 2022
- EASA AD US-2019-25-13SUPERSEDED BY FAA AD 2021-12-01Jan 6, 2020
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