Airworthiness directives › 2012-26-14
AD 2012-26-14 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
Applicability*9
This AD applies to all Rolls-Royce Deutschland Ltd & Co KG BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines.
Compliance
Performing the one-time removal from service of the stages 1 to 6 rotor disc assembly, as specified in this AD, is terminating action to this AD.
Required actions
For the purpose of this AD, flight cycles is the total flight CSN on the HP compressor stages 1 to 6 rotor disc assembly, without any pro-rated calculations applied for different flight missions. Guidance on calculating total flight cycles can be found in Rolls-Royce Deutschland Ltd & Co KG Notice to Operators BR715 engines NTO: No. 184, dated October 25, 2012.
Unsafe condition
Unless already done, do the following actions. (1) BR700-715A1-30 Turbofan Engines Operated Under the Hawaiian Flight Mission Only For BR700-715A1-30 turbofan engines operated under the Hawaiian Flight Mission only, do the following: (1) If the HP compressor stages 1 to 6 rotor disc assembly has accumulated 15,700 flight cycles since new or fewer on the effective date of this AD, remove the rotor disc assembly from service before exceeding 16,000 flight cycles since new (CSN). (2) If the HP compressor stages 1 to 6 rotor disc assembly has accumulated more than 15,700 flight CSN on the effective date of this AD, remove the rotor disc assembly from service within 300 flight cycles. (2) BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 Turbofan Engines (All Flight Missions Except the Hawaiian Flight Mission) For BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines (all flight missions except the Hawaiian Flight Mission), do the following: (1) If the HP compressor stages 1 to 6 rotor disc assembly has accumulated 13,700 flight CSN or fewer on the effective date of this AD, remove the rotor disc assembly from service before exceeding 14,000 flight CSN. (2) If the HP compressor stages 1 to 6 rotor disc assembly has accumulated more than 13,700 flight cycles since new on the effective date of this AD, remove the rotor disc assembly from service within 300 flight cycles.
Affected ADs
None.
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