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AD: The Boeing Company Airplanes

AD NUMBER: 2013-14-05

PRODUCT: Certain The Boeing Company Model 747-400 and 747-400F series airplanes.
SUBJECT: Airworthiness Directive 2013-14-05
ACTION: Final Rule

SUMMARY: This AD was prompted by reports of cracking in the outboard flange of the longeron extension fittings, which attach to the wing-to-body fairing support frame. This AD requires repetitive inspections of the longeron extension fittings for cracking, and corrective actions if necessary.

The FAA is issuing this AD to detect and correct cracks in the longeron extension fittings, which can become large and adversely affect the structural integrity of the airplane.

DATES: This AD is effective August 26, 2013.

FMI: AD

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