AD 2016-01-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracking of the frame inner chords (forward and aft) on the forward edge frame of the number 5 main entry door cutout, which could result in severing of the frame and consequent rapid depressurization of the airplane.
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Required Actions
Conduct a one-time detailed inspection for discrepancies of the frame web and inner chords. Perform repetitive high frequency eddy current (HFEC) inspections for cracking of the frame inner chords (forward and aft). Take corrective action if necessary.
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Compliance Time
Within 50 flight hours after the effective date.
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Affected Aircraft
The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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