AD 86-09-03 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | MBB-BK 117 A-3 | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM Model BK 117A-3 Helicopters |
Unsafe Condition
Possible in-flight separation of tail rotor blade leading edge erosion protective shell or plate.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect tail rotor blades with 5 or more hours time in service before each flight per MBB BK-117 maintenance manual. Remove blades with bonding separation exceeding permissible limits before further flight. Remove blades with less than 5 hours time in service before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight (for blades with less than 5 hours time in service) and before each flight (for blades with 5 or more hours time in service).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MESSERSCHMITT-BOLKOW-BLOHM Model BK 117A-3 helicopters equipped with tail rotor blades P/N 117-31742, S/N's 63 up to and including 82.
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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