Airworthiness Directive · Amendment 39-16213 · Fuselage
McDonnell Douglas Corporation Model MD-90-30 Airplanes
This AD applies to all McDonnell Douglas Corporation Model MD-90-30 airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all Model MD-90-30 airplanes. This AD requires repetitive inspections for cracking of the overwing frames at stations 883, 902, 924, 943, and 962, left and right sides, and corrective actions if necessary. This AD results from reports of cracked overwing frames. We are issuing this AD to detect and correct such cracking, which could sever the frame, increase the loading of adjacent frames, and result in damage to adjacent structure and loss of overall structural integrity of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Before the accumulation of 20,000 total flight cycles, or within 60 months after the effective date of this AD, whichever occurs later: Do general visual and high frequency eddy current inspections for cracking of the overwing frames, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-53A031, dated April 10, 2009. Do the applicable corrective actions before further flight, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-53A031, dated April 10, 2009. Repeat the inspections thereafter at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin MD90-53A031, dated April 10, 2009.
