AD 2003-13-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Cracking of the upper skin of the outboard and center sections of the horizontal stabilizer and the rear spar structure, hinge fittings, terminal fittings, and splice plates could lead to reduced structural capability of the outboard and center sections of the horizontal stabilizer, and result in loss of controllability of the airplane.
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Required Actions
Conduct repetitive inspections for cracking of the upper skin of the outboard and center sections of the horizontal stabilizer and the rear spar structure, hinge fittings, terminal fittings, and splice plates, and repair if necessary. Inspections include Zone B inspections as specified in Parts 3 and 4 of the referenced service bulletin.
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Compliance Time
Within 90 days after the issue date of the service bulletin for airplanes with 27,000 or more flight cycles or 117,000 or more flight hours.
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Affected Aircraft
Boeing Model 747 series airplanes, line number 1 and on, divided into 6 groups, with line numbers 1 through 695 inclusive (Groups 1, 2, and 3 airplanes).
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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