AD 88-03-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | PW2037 | PRATT & WHITNEY Models PW2037 and PW2040 Engines |
| engine | Pratt & Whitney Division | PW2040 | PRATT & WHITNEY Models PW2037 and PW2040 Engines |
Unsafe Condition
Compressor and turbine case cooling air valve tube and 2.5 bleed valve actuator tube cracking that can lead to fuel leaks, substantial fuel quantity loss and possible engine fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove loop clamp bracket assembly P/N 1B2224-01 from compressor and turbine case cooling air valve tubes and install a clamping configuration clamping the tubes to a bracket spanning the pressure and return tubes per PW ASB PW2000 A75-36. Install a new bracket and clamp configuration per PW ASB PW2000 A75-38. Ferrying allowed under FAR 21.197/199. Equivalent compliance may be approved by the Manager, Engine Certification Office.
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Compliance Time
Prior to further flight for engines in specified configurations (FQIS inoperative, FQP Channels inoperative, FMC Systems inoperative, or without OMB 87-7 Rev 1). Within 250 hours in service from AD effective date (July 13, 1988) for engines operating with FQIS functional, both FQP Channels functional, at least one FMC functional, and following OMB 87-7 Rev 1.
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Affected Aircraft
Pratt & Whitney PW2037 and PW2040 turbofan engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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