EASA AD US-2019-16-04
SUPERSEDED BY FAA AD 2019-18-08
Summary
FAA Airworthiness Directive 2019-16-04 is a final rule affecting Engine Alliance GP7270 and GP7277 model turbofan engines equipped with a specific engine fan hub assembly. It mandates inspections and possible replacement of the engine fan hub blade lock assembly to address potential uncontained failures. This directive updates previous requirements to enhance safety measures for these engine models.
What Changed
This directive supersedes FAA AD 2019-03-04 by expanding inspection requirements to include an independent inspection of the engine fan hub assembly prior to reassembly of the blade lock assembly for all affected engines. It also introduces mandatory replacement of the engine fan hub blade lock assembly for certain serial-numbered engines with a redesigned part to reduce damage risk.
Why It Matters
The directive addresses an unsafe condition that could lead to uncontained engine fan hub failure, posing significant safety risks. Compliance ensures early detection and mitigation of cracks or damage, thereby protecting aircraft integrity and passenger safety. Maintenance and compliance teams must update their inspection and repair procedures to align with the new requirements.
What To Do
Operators and maintenance personnel must perform a one-time eddy current inspection and visual inspection of the engine fan hub assembly for cracks and damage as specified. An independent inspection is required before reassembling the engine fan hub blade lock assembly. For certain engines, replacement of the blade lock assembly with an approved part is mandatory. These actions must be completed by August 30, 2019.
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