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Wed, Dec 14, 2016

AD: The Boeing Company Airplanes

AD NUMBER: 2016-25-09

PRODUCT: Boeing Model 747-400, -400D, and -400F series airplanes.

ACTION: Final Rule

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2012-22-02 for certain the aircraft listed above.

AD 2012-22-02 required measuring web at station (STA) 320 and, depending on findings, various inspections for cracks and missing fasteners, web and fastener replacement, and related investigative and corrective actions if necessary.

This new AD requires, for certain airplanes, replacement of the web, including related investigative and corrective actions if necessary.

This AD was prompted by a determination that there were no inspection or repair procedures included in AD 2012-22-02 for airplanes with a certain crown frame web thickness.

DATES: This AD is effective January 17, 2017.

FMI: AD

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