Airworthiness Directive · Amendment 39-14243 · Pratt & Whitney PW2000 Series Turbofan Engines
Pratt & Whitney PW2000 Series Turbofan Engines
This AD applies to Pratt & Whitney (PW) PW2037, PW2040, PW2043, PW2143, PW2643, PW2037D, PW2037M, and PW2040D series turbofan engines. These engines are installed on, but not limited to Boeing 757 series and Ilyushin IL-96T series airplanes.
The FAA is superseding an existing airworthiness directive (AD) for Pratt & Whitney (PW) PW2000 series turbofan engines. That AD currently requires revisions to the engine manufacturer's time limits section (TLS) to include enhanced inspection of selected critical life- limited parts at each piece-part opportunity. This AD requires modifying the airworthiness limitations section of the manufacturer's manual and an air carrier's approved continuous airworthiness maintenance program to incorporate additional inspection requirements. This AD results from an FAA study of in-service events involving uncontained failures of critical rotating engine parts that indicates the need for mandatory inspections. The mandatory inspections are needed to identify those critical rotating parts with conditions, which if allowed to continue in service, could result in uncontained failures. 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.
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 30 days after the effective date of this AD, revise the manufacturer's Time Limits section (TLS) of the manufacturer's engine manual, as appropriate for PW PW2037, PW2040, PW2043, PW2143, PW2643, PW2037D, PW2037M, and PW2040D series 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 PW2000 Engine Manuals 1A6231 and 1B2412:
| Nomenclature | Part No. | EM Manual section | Inspection/check | Subtask |
|---|---|---|---|---|
| Hub, LPC Assembly | ALL | 72-31-04 | -06 | |
| Disk, HPT 1st Stage | ALL | 72-52-02 | FPI entire disk per 72-52-00, Inspection/Check-02 | 72-52-02-230-007 |
| Hub, HPT 2nd Stage | ALL | 72-52-16 | (a) FPI entire hub per 72-52-00, Inspection/Check-02 | 72-52-16-230-007 |
| (b) Eddy-current inspect hub bolt holes per 72-52-16, Inspection/Check-05. | 72-52-16-200-005 | |||
| Hub, HPC Front | ALL | 72-35-02 | -05 | |
| Disk, HPC Drum Rotor Assembly (7-15) | ALL | 72-35-03 | -04 | |
| Disk, HPC Drum Rotor Assembly (16-17) | ALL | 72-35-10 | -05 | |
| Disk, HPC 16th Stage | ALL | 72-35-06 | -04 | |
| Disk, HPC 17th Stage | ALL | 72-35-07 | -04 | |
| HPC Turbine Drive Shaft Assembly | ALL | 72-35-08 | -05 | |
| LPC Drive Turbine Shaft | ALL | 72-32-01 | -06 | |
| Hub, Turbine Rear | ALL | 72-53-81 | -06 | |
| Disk, LPT 3rd Stage | ALL | 72-53-31 | -01 | |
| Disk, LPT 4th Stage | ALL | 72-53-41 | -01 | |
| Disk, LPT 5th Stage | ALL | 72-53-51 | -01 | |
| Disk, LPT 6th Stage | ALL | 72-53-61 | -01 | |
| Disk, LPT 7th Stage | ALL | 72-53-71 | -01 |
(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.”
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
