AD 91-08-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | DaimlerChrysler Aerospace AG | BO-209-150 FF | MESSERSCHMITT-BOLKOW-BLOHM GMBH Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF "Monsun" airplanes (all serial numbers), |
| aircraft | DaimlerChrysler Aerospace AG | BO-209-150 FV | MESSERSCHMITT-BOLKOW-BLOHM GMBH Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF "Monsun" airplanes (all serial numbers), |
| aircraft | DaimlerChrysler Aerospace AG | BO-209-150 RV | MESSERSCHMITT-BOLKOW-BLOHM GMBH Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF "Monsun" airplanes (all serial numbers), |
| aircraft | DaimlerChrysler Aerospace AG | BO-209-160 FV | MESSERSCHMITT-BOLKOW-BLOHM GMBH Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF "Monsun" airplanes (all serial numbers), |
| aircraft | DaimlerChrysler Aerospace AG | BO-209-160 RV | MESSERSCHMITT-BOLKOW-BLOHM GMBH Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF "Monsun" airplanes (all serial numbers), |
Unsafe Condition
Failure of the elevator spar truss and mass balance attachment rib.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Dye penetrant inspect the elevator spar truss and reinforcement angle bar for cracks. If cracks are found, repair and install a doubler. If no cracks, install a doubler. Visually inspect the mass balance attachment rib and replace, repair, or modify the rib. Special flight permits may be issued under FAR 21.197 and 21.199.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Models BO-209-150FV, BO-209-150RV, BO-209-160FV, BO-209-160RV, BO-209-150FF 'Monsun' airplanes (all serial numbers), certificated in any category.
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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