{"id":"F2006B01871","name":"AD/A320/124 Amdt 2 - Overwing Emergency Exit Door Frame Corners","slug":"ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41067,"registerId":"commonwealth-F2006B01871-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/124 Amdt 2 - Overwing Emergency Exit Door Frame Corners","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/A320/124 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/124\n\nAmdt 2\n\n  \nOverwing Emergency Exit Door Frame Corners 11/2004\n\nApplicability: Model A320-200 aircraft, serial numbers MSN 0624 through MSN 1141\\. Model A319 aircraft, all serial numbers up to and including MSN 1167.\n\nRequirement: 1. Perform a detailed visual inspection of affected rivets to detect loose and/or missing rivets in accordance with Airbus Service Bulletin A320-53-1147 original issue, Revision 01, or Revision 02.\n\n2. Remove all the affected rivets in all specified corner areas and check the interior countersinks in accordance with Airbus Service Bulletin A320-53-1147 Revision 02.\n\nNote 1: Accomplishment of Requirement 2 constitutes terminating action for the Requirement 1 inspection.\n\nNote 2: DGAC AD 2003-147(B) R1 refers.\n\nCompliance: 1. Within 3,500 flight cycles after 4 October 2001.\n\nRepeat inspection at intervals not to exceed 3,500 flight cycles in accordance with Revision 02 of the Requirement document; until Requirement 2 is accomplished.\n\n2. Before the accumulation of 24,000 flight cycles. The compliance times remain unchanged by this issue.\n\nThis Amendment becomes effective on 28 October 2004.\n\nBackground: A report was received of a loose ABS213 rivet at the overwing emergency exit door frame corners of A320 and A319 aircraft. Further investigation revealed several instances where the grip length of the rivets was slightly out of tolerance. This condition could affect the structural integrity of the overwing exit frame in the long term.\n\nAmendment 1 introduced a supplemental inspection program to verify/measure affected rivet hole interior countersinks, and clarified Requirement 1 compliance.\n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/124 Amdt 2 (continued)\n\nAmendment 2 is issued to introduce AD 2003-147(B) R1 to Requirement Note 2 as the related DGAC AD.\n\nThe original issue of this Airworthiness Directive became effective on 4 October 2001.\n\n![](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 16 September 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 6 October 2004.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"This Amendment 2 does not broaden the AD's substantive requirements. It principally adds the DGAC AD 2003-147(B) R1 as a related reference (listed in Requirement Note 2) and leaves the inspection and corrective-action requirements and their compliance times unchanged. Earlier Amendment 1 (already issued) introduced the supplemental inspection program and clarified Requirement 1; Amendment 2 only updates the related-authority reference rather than expanding the set of actions or extending applicability."},"complexity_factors":["Applicability limited to two model lines with specific serial-number ranges (clear but geographically narrow).","Two-step requirement structure: repeating inspection (Requirement 1) and terminating corrective action (Requirement 2).","Repeat-inspection interval and a hard terminating deadline: 3,500 flight-cycle repeat interval and a before-24,000 flight-cycle terminating requirement.","Cross-reference to an external technical document with several accepted revisions (Airbus Service Bulletin A320-53-1147 original, Rev 01, Rev 02).","Note referencing a related foreign authority AD (DGAC AD 2003-147(B) R1) adds an external compliance reference.","Some conditional logic: inspections continue at intervals until Requirement 2 is accomplished (looping requirement).","Dependence on judgments in visual inspections (subjectivity increases practical complexity)."],"plain_english_summary":"**What this instrument does (mechanically)\n\n- **Who decides:** The Civil Aviation Safety Authority (CASA) delegate has issued an Airworthiness Directive (AD) that legally requires particular maintenance actions on specified Airbus A319 and A320 aeroplanes.\n\n- **Which aircraft are affected:**\n  - A320-200 aircraft with manufacturer serial numbers (MSN) 0624 through 1141.\n  - A319 aircraft with all MSNs up to and including 1167.\n\n- **What operators must do:**\n  - Requirement 1: Carry out a detailed visual inspection of the specified rivets at the overwing emergency exit door frame corners to find loose or missing rivets, following Airbus Service Bulletin A320-53-1147 (any of the listed revisions: original, Revision 01, or Revision 02).\n  - Requirement 2: Remove all affected rivets in the specified corner areas and inspect the interior countersinks (the recessed hole shape inside the skin) in accordance with Airbus Service Bulletin A320-53-1147 Revision 02.\n  - Note: Completing Requirement 2 stops (terminates) the need for the repeated inspections required by Requirement 1.\n\n- **When the work must be done:**\n  - The first inspection (Requirement 1) must be done within 3,500 flight cycles after 4 October 2001, and then repeated every 3,500 flight cycles until Requirement 2 is completed.\n  - Requirement 2 (rivet removal and countersink checks) must be completed before the aircraft reaches 24,000 flight cycles.\n\n- **Why this was issued (stated reason):** A loose ABS213 rivet was reported at the overwing exit door frame corners. Investigations found several rivets whose grip length (the part of the rivet that fills the hole) was slightly out of tolerance. CASA says this could affect the structural integrity of the overwing exit frame over time, so inspections and corrective work are required.\n\nAnalysis of the mechanics, costs and incentives\n\n- **Who pays:** Aircraft operators (airlines or aircraft owners) pay for inspections, labour and any corrective work. Costs include maintenance shop hours, possible downtime, replacement rivets or any remedial structure work if countersinks are out of tolerance.\n\n- **Who decides in practice:** The AD prescribes following Airbus Service Bulletin A320-53-1147. That means operators must implement the procedures and rely on that external document for technical steps; CASA enforces compliance under CASR. The AD also explicitly accepts specific revisions of the service bulletin as the compliance standard.\n\n- **Behaviour changes required:** Operators must add a repeated inspection cycle (3,500 flight cycles) for the affected rivets until rivets are removed and countersinks checked; they must schedule and perform rivet removal/countersink checks before 24,000 flight cycles. Maintenance providers will need to incorporate these tasks into maintenance planning.\n\n- **Trade-offs and opportunity costs:** The AD prevents a potential long-term structural deterioration risk at the cost of regular inspections and a one-time corrective intervention. Operators will bear direct maintenance costs and indirect costs from aircraft out-of-service time. Those resources cannot be used for other maintenance or operational needs.\n\n- **Implementation and compliance risk:** The AD relies on correct application of the Airbus Service Bulletin and on inspection quality (visual inspection can be subjective). The terminating action requires removal and countersink measurement per Revision 02; using older or incorrect procedures could leave risks unaddressed. Record-keeping and accurate flight-cycle tracking are necessary to meet the stated intervals.\n\n- **Effects on competition and suppliers:** Maintenance providers with capability to perform the specific countersink checks and rivet work may capture demand from affected operators. There is no ownership or operational restriction in the AD itself, but the requirement to follow Airbus documentation channels technical work toward manufacturers' methods.\n\n- **Concentrated benefits, diffuse costs:** Any safety benefit accrues to passengers and the wider flying public; the costs are concentrated on the specific operators of the affected serial-numbered aircraft.\n\nRelevant provisions: Requirement 1 and Requirement 2 (including Note 1 about terminating action) and the Compliance section set the timing and repetition rules. The Background section states the operational reason (rivet grip-length out-of-tolerance)."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of addressing rivet defects in overwing emergency exit door frames. Amendment 2 is purely administrative — it simply adds a cross-reference to the equivalent French aviation safety directive (DGAC AD 2003-147(B) R1) in Note 2. The substantive safety requirements, compliance times, and affected aircraft remain unchanged from Amendment 1."},"complexity_factors":["Short, single-purpose document (2 pages) with clear, numbered requirements","Only 2 defined compliance timeframes (3,500 flight cycles and 24,000 flight cycles)","Minimal cross-referencing — only references one Airbus Service Bulletin (A320-53-1147) and one French directive (DGAC AD 2003-147(B) R1)","Simple conditional logic: Requirement 1 inspections continue until Requirement 2 is completed","Narrow applicability — specific aircraft models and serial number ranges only","No nested exceptions or complex definitional sections"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators of specified Airbus A319 and A320-200 serial ranges to inspect and repair incorrectly sized/loose or missing rivets around overwing emergency exit doors. Loose rivets can weaken door frames and impair evacuation safety.\n\nOperators must carry out recurring inspections (every 3,500 flights) until a permanent repair—removing affected rivets and checking holes—is completed before 24,000 total flights. The directive replaces the prior amendment and aligns with a French safety notice."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners","history":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners/history","analysis":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners/analysis","conflicts":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners/conflicts","importantCases":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners/important-cases","documents":"/api/acts/ad-a320-124-amdt-2-overwing-emergency-exit-door-frame-corners/documents"}}