AD 2004-06-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Defense and Space Group Model 234 | Airworthiness Directives; Boeing Defense and Space Group Model 234 Helicopters |
Unsafe Condition
Crack in the upper shaft extension of the aft vertical shaft assembly, which could result in catastrophic failure of the assembly and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Before further flight, inspect the upper shaft extension for a crack and modify the assembly. Thereafter, inspect the upper shaft extension for any crack before the first flight of each day. If any crack is found, replace the assembly with an airworthy assembly before further flight.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Defense and Space Group Model 234 helicopters with aft vertical shaft assembly, part number 234D3300, serial number-181 or lower with a prefix of A, installed, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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