Airworthiness directives › 2023-11-06
AD 2023-11-06 Airworthiness Directives; Engine Alliance Engines
Models named: GP7270, GP7272, GP7277. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Engine Alliance Model GP7270, GP7272, and GP7277 engines with an installed high-pressure turbine (HPT) interstage seal having part number (P/N) 2047M99P02 and serial number (S/N) BTB71863 or BTB86871.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the next piece-part exposure of the affected HPT interstage seal or before the affected HPT interstage seal exceeds 4,200 cycles since new, whichever occurs first after the effective date of this AD, remove the affected HPT interstage seal from service and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by a manufacturer investigation that revealed that certain HPT interstage seals were manufactured from material suspected to contain iron inclusion. The FAA is issuing this AD to prevent fracture and subsequent uncontained failure of certain HPT interstage seals. The unsafe condition, if not addressed, could result in uncontained debris release, damage to the engine, and damage to the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1