AD 67-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CT58-100-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-5 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-100-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-110-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-110-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-140-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-140-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
Unsafe Condition
First stage compressor rotor discs may exceed their life limit margin due to cyclic fatigue, leading to potential disc failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service specified rotor discs (G.E. P/Ns listed) with more than 9,700 cycles by October 15, 1970, prior to 200 additional cycles. Discs with 9,700 cycles or less must be removed before reaching 9,900 cycles. A cycle is defined as engine operation from start to shutdown including at least one takeoff power acceleration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 200 additional cycles for discs over 9,700 cycles by October 15, 1970; before 9,900 cycles for those at or below 9,700 cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1, and T58-GE-5 engines with specified rotor discs (P/Ns listed in the AD).
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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