AD 2019-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Fatigue cracks could develop in the underwing longerons, resulting in fuel leakage into the pressurized fuselage and increasing the risk of a fire, and cracks in the adjacent fuselage skin, which could result in rapid decompression.
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Required Actions
Perform repetitive inspections of the underwing longerons and certain fuselage skins for any crack, and applicable on-condition actions, including repair.
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Compliance Time
Within the compliance times specified in the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-53A2900 RB, dated April 11, 2019.
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Affected Aircraft
The Boeing Company Model 747-400 and 747-400F series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-53A2900 RB, dated April 11, 2019.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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