AD 2018-21-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. Turbofan Engines |
Unsafe Condition
The second stage low-pressure turbine (LPT2) blades may fail due to excessive wear, which can lead to engine failure.
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Required Actions
Inspect the LPT2 blades using a borescope at the LPT2 blade shroud Z-gap, and if the blades fail the inspection, replace the blades with a part eligible for installation.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
Honeywell International Inc. AS907-1-1A turbofan engines with more than 8,000 hours since new on November 9, 2017.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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