Airworthiness directives › 2012-06-11
AD 2012-06-11 Airworthiness Directives; Airbus Airplanes
Models named: A321-131, -211, -212, -231. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Model A321-131, -211, -212, and -231 airplanes; certificated in any category; manufacturer serial numbers 1293, 1299, 1307, 1333, 1356, and 1366.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Required actions
Before the accumulation of 24,000 total flight cycles or 40,000 total flight hours, whichever occurs first, since first flight of the airplane: Do a rotating probe inspection for cracking of the bore holes of the rib pads in the lower forward and aft panels of the CWB, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A320-57-1120, Revision 01, excluding Appendices 01 and 02, and including Appendix 03, dated November 15, 2006.
Unsafe condition
This AD was prompted by reports of incorrect installation of rib pads of the lower aft panel of the center wing box (CWB) due to poor clamping during drilling, and reports that metal chips trapped between panels and stiffeners could impact the fatigue life of CWB panels. We are issuing this AD to detect and correct cracking and damage in the bore holes of the rib pads of the lower forward and aft panels of the CWB which could result in reduced structural integrity of the wings.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1