AD 81-10-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA-365C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 365C Series Helicopters |
| aircraft | Airbus Helicopters | SA-365C1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 365C Series Helicopters |
| aircraft | Airbus Helicopters | SA-365C2 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 365C Series Helicopters |
Unsafe Condition
Failure of the tail rotor gearbox tripod mount assembly due to cracks in the leg-to-ring junction welds.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within five hours time in service after the effective date and every five hours thereafter, inspect the TRGB mount assembly for cracks. If cracks are found, replace the assembly and continue inspections until compliance with paragraph (c). Within 100 hours time in service, incorporate tail ballast weight, remove and inspect the TRGB mount assembly welds, and replace if cracks are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next five hours time in service after the effective date of this AD, and every five hours thereafter, and prior to the first flight of each day. Within the next 100 hours time in service for paragraph (c).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Societe Nationale Industrielle Aerospatiale (SNIAS) Model SA 365C series helicopters with skid type landing gear P/N 365A82.1370 and/or P/N 365A82.1400 installed, and either no tail ballast per Drawing 365MR0351 or not modified per Service Bulletin Dauphin No. 53.04.
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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