AD 72-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aero Resources Inc. | J-2 Gyroplane | Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft |
Unsafe Condition
The angle between the rotor mast and pitch bearing case may be outside the 3.9 to 5.0 degree tolerance, and loose rivets on the collective stick assembly (part number 27133) at the juncture with collective stick shaft (part number 27104) may cause failure.
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Required Actions
Inspect the rotor mast and pitch bearing case angle using a propeller protractor and rerig if outside 3.9-5.0 degrees. Inspect collective stick for loose rivets; replace assembly if found or reinspect every 25 flight hours if no rivets found.
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Compliance Time
before further flight
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Affected Aircraft
McCulloch Aircraft Corp. Model J-2 Gyroplane, serial numbers 10 and subsequent (for rotor angle requirement) and serial numbers 10 through 54 (for collective stick inspection)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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