AD 88-03-53
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | PW4152 | PRATT & WHITNEY Model PW4152 Engines |
Unsafe Condition
The inability to reduce engine thrust that can lead to asymmetrical power and possible aircraft directional control problems.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the fuel metering unit (FMU) with a new or serviceable unit in accordance with Pratt & Whitney Alert Service Bulletin PW4ENG A73-37, Revision 1. The replacement must be done within 10 operating hours after the AD's effective date for FMUs with 140 or more operating hours, and on or before 150 operating hours for those with less than 140 hours. Subsequent replacements are required every 150 operating hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 operating hours after the effective date of this AD for FMUs with 140 or more operating hours, and on or before accumulating 150 operating hours for those with less than 140 hours. Thereafter, at intervals not to exceed 150 FMU operating hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney PW4152 turbofan engines with fuel metering units (FMU) Part Number 51T217 or 53T419.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.