EASA AD US-2018-11-16
SUPERSEDED BY FAA AD 2019-03-04
Summary
FAA Airworthiness Directive 2018-11-16 is a final rule addressing certain Engine Alliance GP7270, GP7272, and GP7277 turbofan engines. It mandates inspections of the engine fan hub to detect cracks and damage that could lead to uncontained failures. This directive applies to specific serial numbers identified in the Engine Alliance Alert Service Bulletin EAGP7-A72-389, Revision No. 2.
What Changed
This AD introduces a one-time eddy current inspection and visual inspection of the engine fan hub blade slot bottoms and front edges, which were not required by the previous AD 2017-23-03. It also requires removal of any parts found with damage or defects outside serviceable limits. The directive is issued as an interim action pending further investigation.
Why It Matters
This AD is critical for aviation professionals because it addresses a serious unsafe condition involving uncontained engine fan hub failures that can cause significant damage to the engine and aircraft. Operators and maintenance organizations must comply promptly to ensure continued airworthiness and safety. The inspections help detect early signs of failure, preventing potential in-flight incidents.
What To Do
Affected operators must perform the required visual and eddy current inspections within 120 days of the AD's effective date, July 2, 2018. If any cracks or damage beyond serviceable limits are found, the engine fan hub must be removed and replaced. Comments on the AD were invited until July 30, 2018.
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