FAA proposes new airworthiness directives.
The US Federal Aviation Administration (FAA) has adopted a new airworthiness directive (AD) that is applicable to certain Boeing Model 747-100, -200 and 747SP series aircraft. This AD requires repetitive detailed visual and ultrasonic inspections to detect missing, broken or damaged taperlock bolts in the diagonal brace underwing fittings and corrective actions if necessary. The AD also requires eventual replacement of the aft 10 taperlock bolts with new ones, which constitutes terminating action for the repetitive inspections. The AD is effective 28 March 2000.
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