AD 82-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA330F | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model SA 330F, SA 330G, and SA330J Helicopters |
| aircraft | Airbus Helicopters | SA330G | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model SA 330F, SA 330G, and SA330J Helicopters |
| aircraft | Airbus Helicopters | SA330J | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model SA 330F, SA 330G, and SA330J Helicopters |
Unsafe Condition
Possible bearing failure within the main gearbox (MGB) due to fretting in the main bevel gear wheel-to-shaft junction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the bolted junction of the main bevel gear wheel and its shaft inside the MGB for evidence of fretting. If no fretting is found, follow service bulletin instructions to return to service. If fretting is found, inspect the 18 nuts for rotation/slippage; remove MGB from service if found, or conduct repetitive nut inspections every 400 hours' time in service if not.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified time periods based on MGB overhaul status and accumulated hours: for overhauled MGBs, within next 50 hours' time in service after the effective date if over 200 hours since overhaul, or before reaching 250 hours since overhaul; for non-overhauled MGBs, within next 100 hours' time in service if over 1,100 hours' time in service, or before reaching 1,200 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model SA 330F, SA 330G, and SA330J helicopters equipped with main gearbox (MGB) Part Numbers 330A32.2000, 330A32.3000, 330A32.4000, or 330A32.6000 without modification AMS 330A07.52.171 or without SOAP in routine maintenance.
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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