AD 48-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 120 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
| aircraft | Cessna Aircraft Company | 140 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
Unsafe Condition
Loose or improperly sized stabilizer attaching bolts may cause the horizontal stabilizer to become detached from the fin post, resulting in loss of aircraft control.
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Required Actions
Inspect the two bolts attaching the horizontal stabilizer to the fin post for tightness and proper length. Replace bolts with AN 4-5A (for serial numbers 10091 and up) or AN 3-5A (for earlier serial numbers) if threads do not extend through fiber lock rings or bolts have backed off. If new bolts do not achieve at least 3 inch-pounds torque, substitute AN 4-H5A or AN 3-H5A drilled head bolts and safety with wire. Check and increase elevator horn clearance to a minimum of 1/8 inch if necessary.
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Compliance Time
Compliance required by May 1, 1948, and at each annual inspection thereafter.
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Affected Aircraft
Cessna Model 120 and 140 aircraft, serial numbers 8001 through 14329.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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