AD 64-26-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CT58-100-1 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-5 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-1 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
| engine | General Electric Company | CT58-100-2 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
| engine | General Electric Company | CT58-110-1 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
| engine | General Electric Company | CT58-140-1 | GENERAL ELECTRIC Models CT58-100-1, -100-2, -110-1, CT58-140-1; Military T58-GE-1, T58-GE-5 Engines |
Unsafe Condition
Failures of the starter drive shaft bearing causing engine power loss.
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Required Actions
Inspect for metal chips or particles by removing the magnetic plug from the accessory drive gear casing assembly. If chips or particles are found, remove the engine from service or repair the cause before further flight. Install front frame accessory drive pinion bearing and modify starters with specific part numbers, stamping nameplates as required.
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Compliance Time
Within 10 hours' time in service after the effective date for engines with 990+ hours, or prior to 1,000 hours' time in service for those with less, then at intervals not exceeding 10 hours' time in service. The modifications in (e) must be done within 1,600 hours' time in service after July 5, 1966.
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Affected Aircraft
General Electric Models CT58-100-1, -100-2, -110-1; CT58-140-1 (serials 295001-295018); T58-GE-1; T58-GE-5 (serials 285001-285016).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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