AD 81-01-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA-360C Dauphin | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA360C, SA365C, SA365C1 and SA365C2 Helicopters |
| aircraft | Airbus Helicopters | SA-365C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA360C, SA365C, SA365C1 and SA365C2 Helicopters |
| aircraft | Airbus Helicopters | SA-365C1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA360C, SA365C, SA365C1 and SA365C2 Helicopters |
| aircraft | Airbus Helicopters | SA-365C2 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA360C, SA365C, SA365C1 and SA365C2 Helicopters |
Unsafe Condition
Failures of the tail boom or fin due to fatigue cracking at Frame 9420.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracks in the outer fairing connecting the fin base leading edge to the tail boom within the transmission shaft passage area at Frame 9420 using the visual method in Aerospatiale SA360/365 Service Bulletin 05.04 or equivalent. Repeat inspections at intervals not exceeding 25 hours' time in service if no cracks found; daily inspections if cracks under 2 inches found; incorporate modification AMS 365A.07.2457 before flight if cracks 2 inches or longer found.
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Compliance Time
Within 5 hours' time in service if 20+ hours on effective date, or before reaching 25 hours' time in service if under 20 hours on effective date.
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Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA360C, SA365C, SA365C1, SA365C2 helicopters without modification AMS 365A.07.2457.
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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