AD 60-11-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | 74DM6 | SENSENICH M74DM Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | 74DM7 | SENSENICH M74DM Propellers |
Unsafe Condition
Cracked hubs originating in the pilot bore due to three incidents.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect for cracks in the pilot bore; polish out scratches and break/polish sharp edges at the front and rear chamfer if no cracks found; torque retaining bolts to 300 inch-pounds upon reinstallation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours of flight time or by August 1, 1960, whichever comes first, and at each periodic inspection thereafter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sensenich Propeller Manufacturing Company, Inc. models 74DM6 and 74DM7 propellers installed on Lycoming O-320-B series engines except those with an 'A' or 'K' prefix to the serial number.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.