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Sat, Jan 16, 2016

AD: The Boeing Company Airplanes

AD NUMBER: 2016-01-04

PRODUCT: Certain 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.

ACTION: Final Rule

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2005-01-09, which applied to the products listed above.

AD 2005-01-09 required a one-time detailed inspection for discrepancies of the frame web and inner chords on the forward edge frame of the number 5 main entry door cutout, and corrective action if necessary. This new AD adds repetitive high frequency eddy current (HFEC) inspections for cracking of the frame inner chords (forward and aft), and corrective action if necessary.

This AD was prompted by additional cracking found in the same area after completion of the one-time detailed inspection.

The FAA is issuing this AD to detect and correct discrepancies of the frame web and inner chords, which could result in cracking, subsequent severing of the frame, and consequent rapid depressurization of the airplane.

DATES: This AD is effective February 17, 2016.

FMI: AD

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