AD 97-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 777-200 Series | Airworthiness Directives; Boeing Model 777-200 Series Airplanes |
Unsafe Condition
A loose bushing retainer nut of the pivot pin in the horizontal stabilizer hinge assembly, attributed to low nut torque, could result in bushing migration and consequent damage to adjacent structures, and reduced controllability of the airplane.
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Required Actions
Repetitive torquing of the bushing retainer nuts to 1,000 to 1,500 in-lbs; repetitive visual inspections at intervals not exceeding 1,000 flight cycles to detect bushing migration or damage, and repair any damage. Optional installation of anti-rotation brackets to terminate repetitive inspections.
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Compliance Time
Within 150 flight cycles after
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Affected Aircraft
Boeing Model 777-200 series airplanes, line numbers 3, 5, 7 through 9 inclusive, 11 through 13 inclusive, 15 through 17 inclusive, and 19 through 22 inclusive; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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