{"id":"F2009L03064","name":"AD/A330/105 - Outboard Flap - Sensor Strut at Flap Track 4","slug":"ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80672,"registerId":"commonwealth-F2009L03064-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A330 Series Aeroplanes","sectionType":"division","heading":"Airbus Industrie A330 Series Aeroplanes","content":"### Airbus Industrie A330 Series Aeroplanes\n\n| AD/A330/105 | Outboard Flap - Sensor Strut at Flap Track 4 | 9/2009 |\n| ----------- | -------------------------------------------- | ------ |\n\n| Applicability: | Model A330-202, -203, -223, -243, -301, -321, -322, -323, -341, -342 and -343 aircraft, all serial numbers, except aircraft with AIRBUS modification 48579 incorporated in production or AIRBUS Service Bulletin (SB) A330-27-3092 incorporated in service.                                                                                                                                                                                                                                       |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of DGAC AD F-2003-425.Note: AIRBUS Service Bulletins A330-27-3091 initial issue and A330-27-3092 initial issue, or later DGAC/EASA approved revisions, refer.                                                                                                                                                                                                                                                                                          |\n| Compliance:    | 1. For the Requirement document paragraph 3.1. inspection:Repeat at intervals not to exceed 18 months, until paragraph 3.2. modification is incorporated.2. For the Requirement document paragraph 3.2. modification:Unless already accomplished, before 30 September 2009.                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 27 August 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | Reports were received of sensor strut corrosion and the attachment bolt sheared. Investigation revealed that the corrosion was due to the wear of the protective surface, and the attachment bolt sheared due to fatigue rupture subsequent to an increase of the axial loads. This situation could lead to total loss of the sensor strut function resulting in the inability to detect disconnection at tracks 4 and 5 which, in the worst case, could lead to separation of the outboard flap. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 July 2009","sortOrder":0},{"sectionNumber":"AD/A330/105","sectionType":"part","heading":"AD/A330/105","content":"## AD/A330/105","sortOrder":1},{"sectionNumber":"Outboard Flap - Sensor Strut at Flap Tra","sectionType":"part","heading":"Outboard Flap - Sensor Strut at Flap Track 4","content":"## Outboard Flap - Sensor Strut at Flap Track 4","sortOrder":2},{"sectionNumber":"9/2009","sectionType":"part","heading":"9/2009","content":"## 9/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose safety directive (approximately 300 words)","Only 4 defined elements: specific aircraft models, one modification number, one service bulletin, and reference to external French DGAC directive","Simple conditional structure: inspection requirement OR modification requirement with clear deadline","Single cross-reference to external technical documents (DGAC AD F-2003-425 and Airbus SBs) rather than internal legislative references","No nested exceptions — only one exemption clause (aircraft with specific mod/SB already installed)","Clear compliance timeline (18-month intervals for inspection, hard deadline of 30 September 2009 for modification)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires operators of specified Airbus A330 variants to inspect and, by a final compliance date, modify or replace a corrodible sensor strut at Flap Track 4 that can fail and allow outboard flap separation. Operators must carry out repeated inspections (at least every 18 months) until the permanent fix is installed; some aircraft are exempt if they already have the referenced Airbus modification or service bulletin."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"No. The directive confines action to the listed A330 variants and excludes aircraft already modified; it prescribes inspections until a retrofit is fitted and a retrofit deadline, aligning with the stated safety response rather than expanding scope beyond that intent."},"complexity_factors":["Multiple aircraft models listed with an explicit exclusion for airframes already modified (adds applicability nuance)","Two-step compliance: recurring inspections (every 18 months) until a permanent modification is incorporated","Fixed compliance deadline for modification (30 September 2009) plus an effective date for the AD (27 August 2009)","Cross-references to external documents (DGAC AD F-2003-425 and Airbus Service Bulletins) creating dependency on other technical texts","Safety-critical technical work (inspection and structural modification) requiring specialised maintenance resources and parts","Enforcement and interpretation discretion lies with the regulator/delegate referencing foreign authority material"],"plain_english_summary":"Requires operators of specified Airbus A330 variants to inspect the outboard flap sensor strut at flap track 4 every 18 months until a mandated modification is installed, and to incorporate that modification by 30 September 2009 if not already done. The measure responds to reported corrosion and bolt fatigue that can disable the sensor and risk outboard flap separation. Operators pay for inspections and the retrofit; the aviation regulator enforces compliance by referencing Airbus service bulletins and the DGAC airworthiness directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4","history":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4/history","analysis":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4/analysis","conflicts":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4/conflicts","importantCases":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4/important-cases","documents":"/api/acts/ad-a330-105-outboard-flap-sensor-strut-at-flap-track-4/documents"}}