Airworthiness directives › 2019-25-13
AD 2019-25-13 Airworthiness Directives; Engine Alliance Turbofan Engines
Applicability*9
This AD applies to Engine Alliance (EA) GP7270 and GP7277 model turbofan engines with low-pressure compressor (LPC) 1st-stage fan blades, part number (P/N) 5700531, 5702931, 5702931CL1, or 5702931CL2, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For engines with affected LPC 1st-stage fan blades that have 3,250 or more flight cycles (FCs) since new as of the effective date of this AD, within 250 FCs after the effective date of this AD, perform an ultrasonic inspection of the LPC 1st-stage fan blades in accordance with the Accomplishment Instructions, “For Fan Blades Installed In An Engine,” paragraph 1, or “For Fan Blades Not Installed In an Engine,” paragraph 1, as applicable, of EA Service Bulletin (SB) EAGP7-A72-426, dated September 30, 2019. (2) If the ultrasonic inspection of the affected fan blades results in a rejectable ultrasonic indication, remove the fan blade from service and replace with a part eligible for installation before further flight. Note 1 to paragraph (g)(2): Guidance on determining a rejectable ultrasonic indication can be found in Non-Destructive Inspection Procedure, NDIP-1205, Revision 1—GP7000 1st Stage LPC Rotor (Fan) Blade Assembly Airfoil Ultrasonic Inspection for Cracks (Fan Blades installed or uninstalled), (“NDIP-1205”), dated September 23, 2019.
Unsafe condition
This AD was prompted by a report of an in-flight shutdown of an engine due to the fracture of multiple LPC 1st-stage fan blades. The FAA is issuing this AD to prevent failure of the fan blade. The unsafe condition, if not addressed, could result in uncontained fan blade release, damage to the engine, and damage to the airplane.
Affected ADs
None.
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