AD 95-11-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 Helicopters |
| aircraft | Airbus Helicopters | AS350B1 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 Helicopters |
| aircraft | Airbus Helicopters | AS350B2 | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 Helicopters |
| aircraft | Airbus Helicopters | AS350BA | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 Helicopters |
Unsafe Condition
Undetected loss of main gearbox (MGB) oil pressure, leading to loss of the MGB, loss of power to the main rotor system, and subsequent loss of control of the helicopter.
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Required Actions
Check during each engine shutdown that the MGB oil pressure warning light illuminates. If it does not, replace the MGB switch with part number 704A37-721-089 or Jaeger P/N 704A37-721-014 within 30 days after the effective date. Comply with Eurocopter Service Bulletin AS-350 No. 01.43, Rev 1.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE and EUROCOPTER FRANCE Model AS-350B, BA, D, B1, and B2 helicopters with main gearbox oil pressure switch part number 704A37-721-082 (S1130-021-082), modification number 350A07-7141 installed.
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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