Airworthiness directives › 2009-14-05
AD 2009-14-05 Airworthiness Directives; Pratt & Whitney Models PW2037, PW2037(M), and PW2040 Turbofan Engines
Applicability*9
This AD applies to Pratt & Whitney models PW2037, PW2037(M), and PW2040 turbofan engines, with the following high-pressure compressor (HPC) drum rotor disk assemblies installed: Table 1—Affected HPC Drum Rotor Disk Assemblies Drum Rotor Disk Assembly Part No. 1B3702; 1B3702-001; 1B3610; 1B3610-001; or 1B7377— Serial No. 12th Stage Disk Billet and Heat No. T62805 T/LALY-4013 R80293 T/LALY-4012 R80289 T/LALY-4010 R80322 T/LALY-4009 R80330 T/LALY-4008 R78394 T/LALY-4007 R80281 T/LALY-4006 R80304 T/LALY-4005 R80343 T/LALY-4004 R80299 T/LALY-4003 R80313 T/LALY-4002 R80333 M1/LALY-4035 R80324 M1/LALY-4034 R80310 M1/LALY-4033 R80326 M1/LALY-4030 R80305 M1/LALY-4026 R80315 M1/LALY-4025 R80309 M1/LALY-4024 R80341 M1/LALY-4023 R80329 M1/LALY-4022 R80312 M1/LALY-4020 R80321 M1/LALY-4019 R80319 M2/LALY-4040 R80358 M2/LALY-4039 R80302 M2/LALY-4038 R80336 M2/LALY-4037 These engines are installed on, but not limited to, Boeing 757-200 and 757-300 airplanes.
Compliance
You are responsible for having the actions required by this AD performed at the following compliance times: (1) For PW2040 turbofan engines, within 200 cycles-in-service (CIS) after the effective date of this AD, unless the actions have already been done. (2) For PW2037 and PW2037(M) turbofan engines, within 400 CIS after the effective date of this AD, unless the actions have already been done. Non-Destructive Inspection (f) Have a special eddy-current inspection performed on the 12th stage disks installed in the HPC drum rotor disk assemblies listed in Table 1 of this AD, for cracks. Use paragraph 1 of the Accomplishment Instructions of Pratt & Whitney Alert Service Bulletin No. PW2000 A72-736, dated January 5, 2009, to do the special eddy current inspection. Alternative Methods of
Unsafe condition
This AD results from six HPC 12th stage disks found cracked during HPC module disassembly at overhaul. We are issuing this AD to prevent uncontained failure of the HPC 12th stage disk and airplane damage.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1