AD 86-19-15 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS355E | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350C | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model AS 350 and AS 355 Series Helicopters |
Unsafe Condition
Failure of the main rotor head sleeves due to excessive time in service beyond specified thresholds.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace main rotor head sleeves (specific part numbers) with serviceable parts within 100 hours' time in service after the effective date if they have exceeded 3,900 (AS 350 series) or 1,400 (AS 355 series) hours' time in service. Sleeves with less time must be replaced before reaching 4,000 or 1,500 hours' time in service respectively. For sudden severe tracking defects, inspect for bush separation and replace sleeves if found before next flight.
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
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Societe Nationale Industrielle Aerospatiale (SNIAS) Model AS 350 (AS350B, AS350D, AS350D1) and AS 355 series (AS355E, AS355F, AS355F1) helicopters
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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