AD 75-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA.316B Alouette III | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale (formerly Sud Aviation) Model Alouette III SE.3160, SA.316B, SA.316C, and SA.319B Helicopters |
| aircraft | Airbus Helicopters | SA.316C Alouette III | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale (formerly Sud Aviation) Model Alouette III SE.3160, SA.316B, SA.316C, and SA.319B Helicopters |
| aircraft | Airbus Helicopters | SA.319B Alouette III | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale (formerly Sud Aviation) Model Alouette III SE.3160, SA.316B, SA.316C, and SA.319B Helicopters |
| aircraft | Airbus Helicopters | SE.3160 Alouette III | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale (formerly Sud Aviation) Model Alouette III SE.3160, SA.316B, SA.316C, and SA.319B Helicopters |
Unsafe Condition
Failure of the tail boom due to loose rivets at Frame 8 in the upper section of the tailboom.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check the upper section of the tailboom at Frame 8 for loose rivets within 10 hours' time in service after the effective date, and repeat at intervals not exceeding 50 hours' time in service. If more than one rivet is loose, reinforce the tail boom attachment per Service Bulletin 53.31 before further flight. If only one rivet is loose, reinforce within 400 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 10 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 50 hours' time in service since the last check, until reinforced.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Societe Nationale Industrielle Aerospatiale (formerly Sud Aviation) Model Alouette III SE.3160, SA.316B, SA.316C, and SA.319B helicopters with tail boom P/N 3160S.23.11.000.9 to 3160S.23.11.000.13, inclusive.
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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