AD 81-03-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA.315B Alouette III | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA315, SA316B, SA316C, and SA319 Helicopters |
| aircraft | Airbus Helicopters | SA.316B Alouette III | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA315, SA316B, SA316C, and SA319 Helicopters |
| aircraft | Airbus Helicopters | SA.316C Alouette III | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA315, SA316B, SA316C, and SA319 Helicopters |
| aircraft | Airbus Helicopters | SA.319B Alouette III | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models SA315, SA316B, SA316C, and SA319 Helicopters |
Unsafe Condition
Excessive wear at the coupling splines of the rear output bevel pinion-to-vertical gearshaft of the main gearbox could result in transmission failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect transmission components for excessive wear at the coupling splines using Aerospatiale Service Bulletins 05.68 (SA316/SA319) or 05.16 (SA315) or FAA-approved equivalents. Replace the transmission with a serviceable one if displacement exceeds 1.00 millimeter before further flight.
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Compliance Time
Within 10 hours' time in service after the effective date for helicopters with transmissions at or over 390 hours' time in service, or before 400 hours' total time in service for those below 390 hours. Thereafter every 400 hours' time in service.
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale Models SA315, SA316B, SA316C, and SA319 helicopters certificated in all categories.
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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