AD 81-13-09 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS355E | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters |
Unsafe Condition
Cracks in tail rotor blade pitch horns (P/N 350A12-1368-01 or -02) could lead to failure of the pitch horns, compromising tail rotor function.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect pitch horns for flatness and cracks as specified in Aerospatiale Telex Service No. 01.07A. Replace horns before further flight if not flat or cracked. For P/N 350A12-1368-01, remove from service based on time-in-service thresholds (400+ hours by July 31, 1981, or 450 hours total). For P/N 350A12-1368-02, remove before 1,250 hours total time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours' time in service after the effective date of this AD, unless already accomplished per Aerospatiale Telex Service No. 01.07A dated June 5, 1981.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE Models AS350 and AS355 Series Helicopters equipped with tail rotor blade pitch horns P/N 350A12-1368-01 or -02.
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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