AD 79-24-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105A | Airworthiness Directives; Messerschmitt-Bolkow-Blohm Model BO-105 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105C | Airworthiness Directives; Messerschmitt-Bolkow-Blohm Model BO-105 Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105S | Airworthiness Directives; Messerschmitt-Bolkow-Blohm Model BO-105 Helicopters |
Unsafe Condition
In-flight loss of tail rotor balance trim weights and consequent imbalance of the tail rotor blades.
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Required Actions
Inspect tail rotor blades within 10 hours time in service after the effective date, and daily thereafter until modifications are done. If cracks or bonding separation found, replace affected blade or both blades with improved designs. Modify balance provisions of blades per Service Bulletin or approved equivalent.
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Compliance Time
Within the next 10 hours time in service after the effective date of this AD, and thereafter following the last flight of each day upon which the accumulated time in service since the preceding inspection reaches 10 hours, until the modifications required by paragraph (c) of this AD are accomplished.
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Affected Aircraft
Messerschmitt-Bolkow-Blohm Model BO-105A, BO-105C, BO-105S helicopters with tail rotor blades P/N 105-31742 or P/N 105-87161 not modified per Alert Service Bulletin No. AB-16, Revision 1.
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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