AD 2014-12-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | AlliedSignal Inc. | Various | Airworthiness Directives; Honeywell International Inc. (Type Certificate Previously Held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines |
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. (Type Certificate Previously Held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines |
| engine | Garrett | Turbine | Airworthiness Directives; Honeywell International Inc. (Type Certificate Previously Held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines |
Unsafe Condition
Reports of LPT2 blade separations indicate the presence of casting anomalies at or near the root of the LPT2 blade, which could result in LPT2 blade failure, multiple engine in-flight shutdowns, and damage to the airplane.
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Required Actions
Review engine logbook maintenance records to determine if any affected engines are installed. If affected engines are installed, prohibit operation of an airplane with two or more affected engines that have LPT2 blades with less than 250 operating hours since new.
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Compliance Time
Before further flight
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Affected Aircraft
All Honeywell International Inc. TFE731-4, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, -40BR, -50R, and -60 turbofan engines with 2nd stage low-pressure turbine (LPT2) blades, part number (P/N) 3075424-1, -2, or -3, installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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