AD 95-11-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS355E | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale and Eurocopter France Model AS-355 E, F, F1, F2, and N Helicopters |
| aircraft | Airbus Helicopters | AS355F | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale and Eurocopter France Model AS-355 E, F, F1, F2, and N Helicopters |
| aircraft | Airbus Helicopters | AS355F1 | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale and Eurocopter France Model AS-355 E, F, F1, F2, and N Helicopters |
| aircraft | Airbus Helicopters | AS355F2 | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale and Eurocopter France Model AS-355 E, F, F1, F2, and N Helicopters |
| aircraft | Airbus Helicopters | AS355N | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale and Eurocopter France Model AS-355 E, F, F1, F2, and N Helicopters |
Unsafe Condition
Malfunction of the main gearbox (MGB) oil pressure switch (part number 704A37-721-082, modification number 350A07-7141) could result in failure to detect a loss of oil pressure, leading to loss of the MGB, loss of power to the main rotor system, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check during each engine shutdown to ensure the MGB oil pressure warning light illuminates. If the light does not illuminate, replace the MGB switch with part number 704A37-721-089 (modification number 350A07-7152) or Jaeger part number 704A37-721-014 (350A32-3134-00) before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 30 days 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 and Eurocopter France Model AS-355 E, F, F1, F2, and N 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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