AD 76-26-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105A | Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105C | Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters |
Unsafe Condition
Possible rotor failure with consequent engine damage due to loose or detached brake blocks in the main rotor brake saddle Goodrich P/N 2-1188 with brake blocks Goodrich P/N 27-516.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install an operating limitation placard prohibiting rotor brake operation. Inspect main rotor brake saddle for loose or detached brake blocks. If loose brake block found, remove the saddle. If detached brake block found, inspect gearbox compartment and engine compressor for debris/damage, then remove saddle. If brake block is intact, remove saddle within 10 hours time in service after AD effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight, except that the helicopter may be flown in accordance with FAR Sections 21.197 and 21.199 to a base where the work can be performed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C helicopters with main rotor brake system P/N 105-10501.
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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