Airworthiness directives › 2008-26-06
AD 2008-26-06 Airworthiness Directives; Rolls-Royce Corporation (RRC) AE 3007A Series Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce Corporation (RRC) AE 3007A series turbofan engines with high-pressure turbine (HPT) stage 2 wheels, part numbers (P/Ns) 23065892, 23069116, 23069438, 23069592, 23074462, 23074644, 23075345, 23084520, or 23084781, installed. These engines are installed on, but not limited to, Empresa Brasileira de Aeronautica S. A. (EMBRAER) EMB-135 and EMB-145 airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Removing Engines From Service (f) For engines with an HPT stage 2 wheel, P/Ns 23065892, 23069116, 23069438, 23069592, 23074462, 23074644, 23075345, 23084520, or 23084781, remove the engine from service by the cycles-in-service (CIS) specified in Table 1 of this AD. Table 1—Compliance Times for Engine Removal for ECI of the HPT Stage 2 Wheels If the HPT stage 2 wheel has accumulated on the effective date of this AD: Then remove the engine from service: 16,200 cycles-since-new (CSN) or more Within 150 CIS. 15,800 to 16,199 CSN Within 300 CIS. 15,500 to 15,799 CSN Within 450 CIS. Installation Prohibition (g) After the effective date of this AD, don't return to service, any HPT stage 2 wheel that was installed in any RRC AE 3007A series engine removed as a result of paragraph (f) of this AD, unless the HPT stage 2 wheel was inspected as specified in RRC Alert Service Bulletin (ASB) AE 3007A-A-72-367, dated September 5, 2008. Alternative Methods of
Unsafe condition
This AD results from reports of cracked HPT stage 2 wheels. We are issuing this AD to detect cracks in the HPT stage 2 wheel, which could result in a possible uncontained failure of the HPT stage 2 wheel and damage to the airplane.
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