AD 97-19-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | T58-GE-100 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | T58-GE-10 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | T58-GE-5 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | T58-GE-3 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | CT58-100-2 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | CT58-110-1 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | CT58-110-2 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | CT58-140-1 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
| engine | General Electric Company | CT58-140-2 | Airworthiness Directives; General Electric Company CT58 Series Turboshaft Engines |
Unsafe Condition
Fatigue cracking on specific critical rotating parts, which could result in failure of the part, causing an uncontained engine failure and damage to the aircraft.
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Required Actions
Determine hours time in service (TIS) and cycles in service (CIS) per GE SB A72-162. Remove and replace compressor rear shafts based on TIS/CIS thresholds and deadlines. Inspect ten specified rotating parts for cracks initially and at each light/major overhaul, replacing cracked parts before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
General Electric Company Models CT58-100-2, -110-1/-2, -140-1/-2, and T58-GE-3/-5/-10/-100 turboshaft engines installed on Boeing Vertol 107 series, Sikorsky S61 and S62 series aircraft.
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
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