AD 81-21-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA330F | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 330 Series Helicopters |
| aircraft | Airbus Helicopters | SA330G | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 330 Series Helicopters |
| aircraft | Airbus Helicopters | SA330J | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 330 Series Helicopters |
Unsafe Condition
Failure of bearing lubrication and balls escaping from each main rotor blade lever assembly eyebolt pivot ball bearing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate modification AMS 07.43.008 per SNIAS Service Bulletin No. 65.30 for main rotor heads P/N 330A.31.0020 and 330A.31.0030 not modified to AMS 07.43.008. Incorporate modification AMS 07.43.028 per SNIAS Service Bulletin No. 65.38 for main rotor heads P/N 330A.31.0020 and 330A.31.0030 not modified to AMS 07.43.028. Inspect main rotor heads P/N 330A.31.0000.05 to .18, 330A.31.0020.00 to .04, and 330A.31.0030.00 to .03 per SNIAS Service Bulletin No. 01.33 and replace bearings without sealing flange retaining ring with serviceable bearings having the same MRC part number, FAFNIR bearings, or FAA approved equivalent before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 50 hours' time in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 330 series helicopters certificated in all categories, with main rotor heads P/N 330A.31.0020, 330A.31.0030 (all dash numbers), and 330A.31.0000.05 to .18, 330A.31.0020.00 to .04, and 330A.31.0030.00 to .03 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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