ALERT OPERATOR TRANSMI SSI ON - ALERT OPERATOR TRANSMI SSI ON

SUBJECT: A330 - ATA52 - INSPECTI ON OF AFT CARGO COMPARTMENT DOOR AT FRAME 60 AND FRAME 60A OUR REF: AOT A330 - A52L 001 - 12 dated 3 Dec 2012 1. AIRCRAFT AFFECTED All A330 - 200/300 aircraft up to MSN 0162 except those that have SB 52 - 3044 incorporated. 2. REFERENCED DOCUMENTATION Ref.1: SRM 52 - 31 - 00 PB 001 Fig.3 Sheet 1 Item 100 Ref.2: SRM 52 - 31 - 00 PB 001 Fig.3 Sheet 1 Item 105 Ref.3: AOT A330 - 52A3085 - Inspection of forward cargo compartment door Ref.4: SRM 52 - 32 - 00 PB 001 Fig.3 Sheet 1 Item 100 Ref.5: SRM 52 - 32 - 00 PB 001 Fig.3 Sheet 1 Item 105 Ref.6: AOT A330 - 52A3084 - Inspection of aft cargo compartment door Ref.7: IPC 52 - 32 - 11 - COVER - ACCESS, HANDLE Zone(s): 822 - Access Panels 822DR and 822CR Re f.8: TFU 52.32.00.003 - Aft cargo door cracked frame 3. REASON 3.1 FACTS One operator has recently reported a case of A330 forward cargo door with two adjacent frame forks found cracked. Frame 20B (Ref.1) was found cracked through, frame 21 (Ref.2) was found cracked half through. At time of findings the aircraft had accumulated around 21000 FC. This A/C has been regularly inspected as per AOT Ref.3 inspection. However, during AOT Ref.3 accomplishment, the forward cargo door handle access panels 821CR an d 821DR (Ref.7) were not removed, thus cracks at these two frames location might have remained undetected. Note: A330/A340 forward cargo door Frame 20B between beam 3 and beam 4 is inspected according to ALI Task 523106 - 01 - 1 (for A/C pre - mod 50528 and A/C pre - mod 51038) with a first inspection at 10600FC and repetitive inspections every 2600 FC. 3.2 CONSEQUENCESIn case of one cracked or ruptured forward or aft cargo door frame, the loads will be

transferred to the remaining structural elements. This sec ond load path is able to sustain the loads for a limited number of flight cycles. A Safet y Assessment has shown that rupture of two vertical frames represents an unsafe condition due to the loss of the structural integrit y of the cargo door. As a consequ ence of the above and based on this new event on forward cargo door, it is necessary to launch an in - service action for both forward and aft cargo doors to ensure that structure behind handle access panels has been properly inspected. 3.3 AIM The aim of this AOT is to provide instructions for a repetitive inspection of the aft cargo door frames Fr60 (Ref.4) and Fr60A (Ref.5) for cracks and for sheared, loose or missing rivets. 4. ACTION REQUIRED 4.1 PLANNING Perform the inspection described in paragr aph 4.3 before the accumulation of 15800 FC after the first flight or within 100 FC from AOT issue date whichever occurs later. Afterwards, inspection described in paragraph 4.3 has to be repeated every 400FC. 4.2 MANPOWER 0.5 man - hours per aircraft are estimated for the inspection accomplishment. 4.3 DESCRIPTION Before inspecting, close and lock the forward cargo door. Perform a detailed visual inspection of outer skin rivets at frame fork end Fr60 and Fr60A for loose, sheared or missing rivets (Ref er to appendix 01) Remove handle access panels 822CR and 822DR Ref. 7 (Refer to appendix 02). Perform a detailed visual inspection of the whole Fr60 and Fr60A forks for cracks and for loose, sheared or missing rivets at frame web and flanges (Refer to ap pendix 03). In case of crack findings or rivets found sheared, loose or missing, the aft cargo door has to be repaired before next flight. Contact Airbus for repair instructions.In case of nil finding repeat this inspection every 400 FC as well as the inspection as per AOT Ref.6 which remains applicable. 4.4 MATERIAL AIRBUS MATERIAL, LOGI STI CS AND SUPPLIERS WEG BEIM JAEGER 150 D - 22335 HAMBURG GERMANY FAX: + 49 40 5076 4012 IN TERNET: HTTP://SPARES.AIRBUS.COM 5. TERMI

NATING ACTION A repetitive insp ection service bulletin for the aft cargo door is under preparation and will supersede and cancel this AOT as well as AOT Ref. 6 and mandatory I SB 52 - 3043 "AFT CARGO COMPARTMENT DOOR - INSPECT STRUCTURE FOR CRACKS". It is anticipated that this inspection service bulletin will be mandatory . TFU Ref.8 will keep operators informed about the forthcoming terminating action. 6. AOT APPROVAL The technical content of this document is approved under the authority of DOA nr. EASA.21J.031. It is anticipated that this AOT will be rendered mandatory by an EASA AD. 7. REPORTI

NG/ACKNOWL EDGEMENT Operators are requested to acknowledge receipt of this AOT within 48 hours after receipt to: Cecile BORDES, SEES E - mail: cecile.bordes@airbus.com Fax number: +33+ (0)5 61. 93.36.14 Question about this AOT and inspection results with or without findings are to be sent to AIRBUS CUSTOMER SERVI CES ENGINEERING as soon as possible, after the AOT application, to the attention of: Celine GALLET, SEES3 Phone number: +33+ (0)5 61.1 8.87.45Fax number: +33+ (0)5 61.93.36.14

E - mail: celine.gallet@airbus.com Best Regards, Jean - Lu c MOUYSSET Philippe GOURDON VI CE PRESIDENT ENGINEERING SUPPORT VI CE PRESIDENT A330/A340 PROGRAMME CUSTOMER SERVI CE S CUSTOMER SERVI CES