Airworthiness Directive · Amendment 39-16337 · Wings
McDonnell Douglas Corporation Model DC-10-10, DC-10-10F, and MD-10-10F Airplanes
This AD applies to McDonnell Douglas Corporation Model DC-10-10, DC-10-10F, and MD-10-10F airplanes, certificated in any category, as specified in Boeing Alert Service Bulletin DC10-57A157, dated May 12, 2009.
We are adopting a new airworthiness directive (AD) for certain Model DC-10-10, DC-10-10F, and MD-10-10F airplanes. This AD requires a one-time high frequency eddy current inspection of fastener holes for cracks at the left and right side wing rear spar lower cap at station Xors=345, and other specified and corrective actions if necessary. This AD results from a report of three instances of Model DC-10-10F airplanes having fuel leaks in the wing rear spar lower cap at station Xors=345. We are issuing this AD to prevent cracks in the spar cap, which could lead to cracking of the lower wing skin, fuel leaks, and the inability of the structure to sustain limit load.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 3,000 flight cycles after the effective date of this AD, do a one-time high frequency eddy current inspection for cracking of fastener holes at the left and right side wing rear spar lower cap at station Xors=345, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin DC10-57A157, dated May 12, 2009.
(1) If no cracking is found, before further flight, cold work open holes and install new second oversize fasteners and nut assemblies in the left and right side wing rear spar lower cap, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin DC10-57A157, dated May 12, 2009.
(2) If any cracking is found during any inspection required by this AD, before further flight, repair the left and right side wing rear spar lower cap using a method approved in accordance with the procedures specified in paragraph (h) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
