AD 80-15-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model AS350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model AS350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model AS350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model AS350 Series Helicopters |
Unsafe Condition
Incorrect installation of the rotating star drive adapter could result in vibration and premature wear of the rotating star bolts.
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Required Actions
Measure the dimension between the spacer and the upper face of the rotating drive adapter at three locations spaced 120 degrees apart using a fixed length block and feeler gauge within 25 hours time in service after the effective date. Compare measurements and reposition the adapter if variation exceeds 0.039 inches (1 mm) as per Service Bulletin 65.01. Repeat steps after maintenance on the bolts.
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Compliance Time
within 25 hours time in service after the effective date of this AD
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Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Model AS350 series helicopters with main rotor assembly P/N 350A.37.0003, serial numbers M1 through M146 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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