AD 95-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-1 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-3 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-4 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 B-1 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 B-2 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 C-1 | Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters |
Unsafe Condition
The current latches on the transmission and engine cowling access doors can become worn and loose in flight, potentially failing even when properly latched, leading to door separation and ingestion by rotor systems resulting in loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 150 hours time-in-service, modify the access door latches, cowlings, fire walls, and fuselage per MBB-Helicopters Alert Service Bulletin ASB-MBB-BK 117-20-104, Revision 1. An alternative method of compliance may be approved by the FAA Manager, Rotorcraft Standards Staff.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 150 hours time-in-service
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter Deutschland GmbH Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 helicopters, serial numbers 7001 through 7201
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.