Operators revisit 747-400F maintenance schedules to minimize AD impact

The clock is ticking to conduct lengthy inspections for air cargo’s workhorse

After the discovery of cracks in the front spar shear tie and at the intercostal lug fitting on some 747 aircraft, the Federal Aviation Administration adopted a new airworthiness directive (AD) that affects all 747-200Fs and 747-400Fs on U.S. Air Operator Certificates. Although ADs are routinely issued, the current unavailability of repair kits and a fast-approaching effective date of Oct. […]


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