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Mon, Oct 08, 2012

AD: The Boeing Company Airplanes (747)

AD NUMBER: 2012-20-03

PRODUCT: Certain The Boeing Company Model 747 airplanes.
SUBJECT: Airworthiness Directive 2012-20-03
ACTION: Final Rule

SUMMARY: The FAA is superseding an existing airworthiness directive (AD) for the product listed above. That AD currently requires repetitive visual inspections around the bushings of the wing landing gear (WLG) beam outboard end fittings for corrosion, and rework if necessary; and ultrasonic inspections for cracks of the outboard end fittings of the WLG support beams, and rework if necessary.

This new AD adds airplanes and adds repetitive inspections of the outboard end fitting of the left and right WLG support beams for cracks and corrosion, and corrective actions if necessary. This AD was prompted by new reports of corrosion damage to the end fittings of the WLG support beams, and one report of subsequent cracking in the end fittings.

The FAA is issuing this AD to detect and correct corrosion and subsequent cracking in the outboard end fittings, which could result in separation of the fitting and damage to adjacent flight control cables and hydraulic systems and consequent reduced controllability of the airplane.

DATES: This AD is effective November 9, 2012.

FMI: AD

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