Airworthiness directives › 2005-25-09
AD 2005-25-09 Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines
Applicability*9
This AD applies to Pratt & Whitney (PW) Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, PW4650, PW4164, PW4168, PW4168A, PW4074, PW4074D, PW4077, PW4077D, PW4084, PW4084D, PW4090, PW4090-3, PW4090D, and PW4098 turbofan engines. These engines are installed on but not limited to, Airbus A300, A310, and A330 series, Boeing 747, 767, and 777 series, and McDonnell Douglas MD-11 series 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. (f) Within the next 60 days after the effective date of this AD, revise the Time Limits Section (TLS) of the Engine Manuals (EMs), part numbers 50A443, 50A605, 50A822, 51A342, 51A345, and 51A751, as applicable, for PW Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, PW4650, PW4164, PW4168, PW4168A, PW4074, PW4074D, PW4077, PW4077D, PW4084, PW4084D, PW4090, PW4090-3, PW4090D, and PW4098 turbofan engines, and for air carriers, revise the approved continuous airworthiness maintenance program, by adding the following: “MANDATORY INSPECTIONS (1) Perform inspections of the following parts at each piece-part opportunity in accordance with the instructions provided in the PW4000 series Engine Cleaning, Inspection and Repair (CIR) Manuals: For Engine Manuals 50A443, 50A605, and 50A822, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Hub, Front Compressor ALL 72-31-07 Insp/Check-02 51A357 Hub, Turbine, Front Assy (Stage 1) ALL 72-52-05 Insp/Check-02 51A357 Hub, Turbine, Intermediate Rear (Stage 2) ALL 72-52-06 Insp/Check-02 51A357 For Engine Manual 51A342, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Hub, LPC Assembly ALL 72-31-07 Insp/Check-02 51A357 Hub, Turbine, Front Assembly (Stage 1) ALL 72-52-05 Insp/Check-02 51A357 Seal—Air, HPT Stage 2 ALL 72-52-22 Insp/Check-02 51A357 Hub, Turbine, Rear (Stage 2) ALL 72-52-06 Insp/Check-02 51A357 For Engine Manuals 51A345 and 51A751, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Hub, LPC Assembly ALL 72-31-07 Insp/Check-02 51A750 Seal—Air, HPT Stage 1 ALL 72-52-19 Insp/Check-02 51A750 Hub, Turbine, Front Assembly (Stage 1) ALL 72-52-05 Insp/Check-02 51A750 Seal—Air, HPT Stage 2 Assemply ALL 72-52-22 Insp/Check-02 51A750 Hub, Turbine Rear Assembly (Stage 2) ALL 72-52-06 Insp/Check-02 51A750 For Engine Manuals 50A443, 50A605, and 50A822, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual HPC Stage 5 Disk ALL 72-35-06 Insp/Check-02 51A357 HPC Front Drum Rotor ALL 72-35-07 Insp/Check-02 51A357 HPC Rear Drum Rotor ALL 72-35-08 Insp/Check-02 51A357 HPC Rear Drum Rotor ALL 72-35-10 Insp/Check-02 51A357 For Engine Manual 51A342, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual HPC Stage 5 Disk ALL 72-35-06 Insp/Check-02 51A357 HPC Front Drum Rotor ALL 72-35-07 Insp/Check-02 51A357 HPC Rear Drum Rotor ALL 72-35-10 Insp/Check-02 51A357 For Engine Manuals 51A345 and 51A751, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual HPC Stage 5 Disk ALL 72-35-06 Insp/Check-02 51A750 HPC Front Drum Rotor ALL 72-35-07 Insp/Check-02 51A750 HPC Rear Drum Rotor ALL 72-35-10 Insp/Check-02 51A750 HPC Stage 15 Disk ALL 72-35-92 Insp/Check-02 51A750 HPT Stage 1 Airseal ALL 72-52-19 Insp/Check-02 51A750 HPT Front Hub ALL 72-52-05 Insp/Check-02 51A750 HPT Stage 2 Airseal ALL 72-52-22 Insp/Check-02 51A750 HPT Rear Hub ALL 72-52-06 Insp/Check-02 51A750 For Engine Manuals 50A443, 50A605 and 50A822, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Stage 3 LPT Disk ALL 72-53-13 Insp/Check-02 51A357 Stage 4 LPT Disk ALL 72-53-14 Insp/Check-02 51A357 Stage 5 LPT Disk ALL 72-53-15 Insp/Check-02 51A357 Stage 6 LPT Disk ALL 72-53-16 Insp/Check-02 51A357 For Engine Manual 51A342, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Stage 3 LPT Disk ALL 72-53-13 Insp/Check-02 51A357 Stage 4 LPT Disk ALL 72-53-14 Insp/Check-02 51A357 Stage 5 LPT Disk ALL 72-53-15 Insp/Check-02 51A357 Stage 6 LPT Disk ALL 72-53-16 Insp/Check-02 51A357 Stage 7 LPT Disk ALL 72-53-61 Insp/Check-02 51A357 For Engine Manual 51A345, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Stage 3 LPT Disk ALL 72-53-13 Insp/Check-02, Config-1 51A750 Stage 4 LPT Disk ALL 72-53-14 Insp/Check-02 51A750 Stage 5 LPT Disk ALL 72-53-60 Insp/Check-02 51A750 Stage 6 LPT Disk ALL 72-53-16 Insp/Check-02, Config-1 51A750 Stage 7 LPT Disk ALL 72-53-72 Insp/Check-02 51A750 Stage 8 LPT Disk ALL 72-53-62 Insp/Check-02, Config-1 51A750 Stage 9 LPT Disk ALL 72-53-63 Insp/Check-02 51A750 For Engine Manual 51A751, add the following table data: Part nomenclature Part number CIR manual section CIR manual inspection CIR manual Stage 3 LPT Disk ALL 72-53-13 Insp/Check-02, Config-2. See Note ( 1 ) 51A750 Stage 4 LPT Disk ALL 72-53-14 Insp/Check-02 51A750 Stage 5 LPT Disk ALL 72-53-60 Insp/Check-02 51A750 Stage 6 LPT Disk ALL 72-53-16 Insp/Check-02, Config-2. See Note ( 1 ) 51A750 Stage 7 LPT Disk ALL 72-53-72 Insp/Check-02 51A750 Stage 8 LPT Disk ALL 72-53-62 Insp/Check-02, Config-2. See Note ( 1 ) 51A750 Stage 9 LPT Disk ALL 72-53-63 Insp/Check-02 51A750 ( 1 ) FPI method only. (2) For the purposes of these mandatory inspections, piece-part opportunity means: (i) The part is considered completely disassembled when done in accordance with the disassembly instructions in the manufacturer's engine manual to either part number level listed in the table above, and (ii) The part has accumulated more than 100 cycles in service since the last piece-part opportunity inspection, provided that the part was not damaged or related to the cause for its removal from the engine.” Alternative Methods of
Unsafe condition
This AD results from the need to add additional inspection requirements for PW4000-94” engine models only, and to add the PW4062A engine to the applicability. We are issuing this AD to prevent critical life-limited rotating engine part failure, which could result in an uncontained engine failure and damage to the airplane.
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