AD 2001-18-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company T58 and CT58 Series | Airworthiness Directives; General Electric Company T58 and CT58 Series Turboshaft Engines |
Unsafe Condition
Low-cycle fatigue failure of rotating parts that could result in uncontained engine failure and damage to the rotorcraft.
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Required Actions
Within 50 hours time-in-service after the effective date, calculate the new cycles-since-new for life-limited rotating parts using GEAE Service Bulletin (CT58) 72-162 CEB-258, revision 9. Remove and replace any part exceeding the new calculated life limit.
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Compliance Time
Within 50 flight hours after the effective date.
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Affected Aircraft
General Electric Company T58 and CT58 series turboshaft engines installed on, but not limited to, Boeing-Vertol V-107 series, Kaman H-2, Bell UH-1F series, Sikorsky CH/HH-3 series, S-61 A/H-3/CH124/CH-3/HH-3L/N/R series, and S-62 series rotorcraft.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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