Summary
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 B4-603, B4-620, and B4-622 airplanes; Model A300 B4- 605R and A300 B4-622R airplanes; and Model A300 C4-605R Variant F airplanes. This proposed AD was prompted by an in-service detection of cracks in the fuselage skin lap joints. This proposed AD would require an ultrasonic inspection of certain skin lap joints, and repair if necessary. We are proposing this AD to detect and correct cracks in certain skin lap joints. Such cracking could result in reduced structural integrity of the airplane.