AD 2013-26-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Reports of cracks on the 2nd-stage turbine disk, specifically in the serrations of the disc, have been identified. These cracks are present on both non-shot peened discs and discs that were shot peened during service life.
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Required Actions
Remove the 2nd-stage turbine disk, part number 0265260270, from ASTAZOU XIV B engines that have not incorporated AB 138 modification. For engines with 1,800 or more cycles since new or cycles since last overhaul, remove the disk within 10 operating hours after the effective date. For engines with less than 1,800 cycles, remove the disk within 300 operating hours or before reaching 1,800 cycles, whichever comes first. For ASTAZOU XIV B engines with AB 138 modification, remove the disk, part number 0283270200 with 0265260270 marked, within 1,800 cycles or 10 operating hours after the effective date, whichever is later. For ASTAZOU XIV H engines, remove the disk, part number 0265260270, within 300 operating hours after the effective date.
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Compliance Time
Within 10 operating hours or 300 operating hours, depending on engine cycles and modification status.
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Affected Aircraft
All Turbomeca S.A. ASTAZOU XIV B and XIV H engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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