AD 80-22-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 Series Helicopters |
Unsafe Condition
Failure of the tail rotor transmission and deterioration of the tail rotor flapping hinge bearings, which could result in loss of directional control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the tail rotor drive shaft assembly with Aerospatiale Modification No. AMS 350A-07-6519 or equivalent. Modify the tail rotor transmission P/N 350A-33-0006-03 with Aerospatiale Modification No. AMS 07-8519 or equivalent. Incorporate specified operating instructions and work cards into the maintenance manual and perform daily checks. Inspect bearings and transmission for dimensional issues and leaks/cracks, replace parts as specified, and repeat inspections if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours time in service after the effective date of this AD
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale (SNIAS) Model AS 350 Series 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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