AD 2012-16-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. Turbofan Engines |
Unsafe Condition
During LPT rotor acceleration, 2nd stage low-pressure turbine (LPT2) rotor blades may contact and damage the 3rd stage LPT (LPT3) nozzle seal carrier, leading to fatigue and subsequent rotor damage. Additionally, these blades could deform the blade retainers, causing blade movement and rotor damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and inspect suspect LPT2 rotor blades at the next major periodic inspection, not to exceed 3,000 hours time-since-new, or within 5 years after the effective date of this AD, or at the next access, whichever occurs first. Use Honeywell Service Bulletin TFE731-72-5221, Revision 0, dated November 11, 2010.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 years after the effective date of this AD, or at the next access, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Honeywell International Inc. TFE731-20R, -20AR, -20BR, -40, -40AR, -40R, -50R, and -60 turbofan engines with specific engine model numbers and serial numbers listed in Table 4 of Honeywell Service Bulletin TFE731-72-5221, Revision 0, or with LPT2 rotor assembly part numbers 3060608-2, 3060608-3, or 3060608-5 that had LPT2 rotor blades replaced between March 2009 and September 2010.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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