AD 2008-22-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | General | Electric Company (GE) CT58 Series Turboshaft | Airworthiness Directives; General Electric Company (GE) CT58 Series Turboshaft Engines |
Unsafe Condition
Reports of cracks originating from the inner faces of the locking screw holes in the compressor spool, which could result in an uncontained rotor burst and damage to, or loss of, the helicopter and serious injuries to any person onboard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Recalculate the life of compressor spools (P/N 5920T82G07, 6010T57G07, or 6010T57G08) using an RHL mission multiplying factor of 3.7 cycles per hour and 6.0 cycles per hour. Remove the compressor spools before January 1, 2010, based on the recalculated cycles. After January 1, 2010, remove the engine before the compressor spool exceeds its part life limit using the RHL multiplying factor of 6.0. Do not install engines with compressor spools that meet or exceed the life limits as calculated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD (December 1, 2008).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GE CT58 series turboshaft engines with compressor spools, part numbers 5920T82G07, 6010T57G07, or 6010T57G08, installed on, but not limited to, Sikorsky S-61A, S-61L, S-61N, S-61R, S-62, and Columbia 107-II helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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