AD 81-21-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA.315B Alouette III | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA315B Helicopters |
Unsafe Condition
Failure of the ERC cargo hook support legs, part number 12579-1, due to fatigue cracks.
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Required Actions
Inspect the lugs (P/N 12579-1) using magnetic particle inspection per SB315-05 within 100 hours' time in service after the effective date. If cracks are found, replace all four lugs per SB315-04. Repeat inspections every 1,000 lifts or 12 calendar months, whichever comes first, unless SB315-04 is complied with.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale (SNIAS) Model SA315B helicopters equipped with ERC cargo hook assemblies (P/N 17112-4, Serial Numbers 1 through 103) under STC SH1735SW
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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