Airworthiness directives › 2013-02-06
AD 2013-02-06 Airworthiness Directives; Engine Alliance Turbofan Engines
Applicability*9
This AD applies to all Engine Alliance GP7270 and GP7277 turbofan engines with a high-pressure turbine (HPT) stage 2 nozzle, part number (P/N) 2101M24G01, 2101M24G02, or 2101M24G03, installed.
Compliance
(1) Initially borescope inspect (360 degrees) the HPT stage 2 nozzle at the following: (i) Before accumulating 1,500 cycles-since-new (CSN), if the nozzle has fewer than 1,450 CSN on the effective date of this AD. (ii) Within the next 50 cycles, if the nozzle has 1,450 or more CSN on the effective date of this AD. (2) Thereafter, repetitively borescope inspect (360 degrees) the HPT stage 2 nozzle within every 100 additional cycles-in-service. (3) If during any inspection required by this AD, any burn holes are detected through the surface of the nozzle, remove the nozzle from service before further flight.
Required actions
At the next engine shop visit, remove HPT stage 2 nozzles P/N 2101M24G01, 2101M24G02, and 2101M24G03 from service.
Unsafe condition
Comply with this AD within the compliance times specified, unless already done.
Affected ADs
None.
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