AD 74-10-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | BOEING Model 727 Series Airplanes |
Unsafe Condition
Failure of the horizontal stabilizer hinge pins or threaded retention rods could result in loss of horizontal stabilizer control.
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Required Actions
Inspect horizontal stabilizer hinge pins for integrity, replace as necessary, install threaded retention rods P/N 69-67076 or equivalent, and conduct a hinge pin retainer nut torque inspection if a Class 2 thread rod is installed. Actions must follow Boeing Alert Service Bulletin 727-55-59 or FAA-approved methods.
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Compliance Time
Within 15 days after February 27, 1975, for airplanes delivered after September 30, 1973, or with new hinge pins installed since then; within 6 months after February 27, 1975, for others. The torque inspection must be done before September 6, 1975.
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Affected Aircraft
Boeing Model 727 Series airplanes including 727-100, 727-100C, 727-200, 727-200F, 727 Series, and 727C Series, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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