AD 88-23-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-1 | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) GmbH Models BK-117 A-1, A-3, and A-4 Series Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-3 | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) GmbH Models BK-117 A-1, A-3, and A-4 Series Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-4 | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) GmbH Models BK-117 A-1, A-3, and A-4 Series Helicopters |
Unsafe Condition
Failure to have correct VNE placards could result in operation outside of approved operating limits, causing possible hazards in flight.
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Required Actions
Apply new VNE placards with specified part numbers (117-740131.97, 117-740131.98, 117-740131.99, or 117-740131.100) per MBB Alert Service Bulletin MBB-BK 117-70-101. The placard may be installed by a pilot with required maintenance records entries under FAR Parts 43 and 91. Equivalent compliance is allowed with FAA approval.
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Compliance Time
within 30 days after the effective date of this AD, unless already accomplished
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Affected Aircraft
MBB BK-117 A-1, A-3, and A-4 series helicopters certificated in any category
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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