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### 14CFR Part 39 DEPARTMENT OF TRANSPORTATION 

### Federal Aviation Administration



# i309 (Docket No. FAA-2010-*****; Directorate Identifiel'" 2010-NM-060-AD) RIN 2120-AA64 Airworthiness Directives; Airbus Model A330-300. A340-200, andA340~300 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. 

### ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: Wepropose toadopt anew airworthiness directive (AD) fortheproduc listed above. This proposed ADresults from mandatory conlinuing airworthiness infolTIlation (MeAT) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The 

### MeAl describes the unsafi condition as: 

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Surface defects were visually detected on the rudder of one Airbus A319 and one A321 in-service aeroplane. lnvdstigation has determined that the defects reported on both rudders corresp:onded to areas that had been reworked in production. The investigation confirmed that the defects were the result of de-bonding between the skin and honeycomb core. Such reworks were also perfonned on some rudders fitted on A330-300 and A340-200/-300 aeroplanes. An extended de-bonding, ifnot detected and corrected, may degrade the structural integrity ofthe rudder. The loss ofthe rudder leads to degradation of the handling qualities and reduces the controllability ofthe aeroplane. 

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## * The proposed AD would require actions that are intended to address the unsafe condition

FAA Form 1360-14.1 (6-89) OFFICIAL FILE COPY ¢lu.s. GOVERNMENT ?fUNTlN:GOFFICE 1!l95 • 169·2111491Q-IJ-Pj DEPARTMENT OFTRANSPORTATION Federal Aviation Administration 14CFR Part39 {Docket No. FAA-2010-**'***; Directorate Identifier- 2010-l'"'M-060-ADI RIN 2120-AA64 Airworthiness Directives; Airbus ModelA330-300" A340-200, and A340-300 Series Airplanes I AGENCY: Federal Aviation Administration (FAA)r DOT. ACTION: Notice ofproposedruJemaking (NPRM). SUMMARY: Wepropose toadopt ane\vairworthiness directive lAD) fortheproduct

, listed above. This proposed AD results from mandatory continuing airwonhiness information (MeAl) originated byan aviation authority of another country 10identify and correct an unsafe condition on an aviation prodl;lct. The MeAl describes the unsafi condition as: Surface defects were visually detected ontherudder ofoneAirbus AJ19 alld one A321 in-service aeroplane. lnves[ig~lion has dctcnllined that the defects reported onboth rudders correspondtd to areas that hadbeen reworked in production. The investigation 

## donfirmed that the defects were the resull ofde~bonding between the skin ~d honeycomb core. Such reworks were also performed on some rudders fitted on A330-300 and A340-200/~300 aeroplanes. 

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# -- ~" An extended de-bonding. ifnat detected and corrected. may degrade the structural integrity ofthe rudder. The loss Qfthe rudder leads to degradation orthe handling qualities and reduces the controllability ofthe aeroplane. 

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The proposed AD would require actions that are intended to address the unsafe condhion

FAAForm 1360·14.1 (6-89) OFFICIAL RLE COPY