{"id":"F2006B01965","name":"AD/A320/76 - Sliding Window Frame","slug":"ad-a320-76-sliding-window-frame","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41187,"registerId":"commonwealth-F2006B01965-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/76 - Sliding Window Frame","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/76 Sliding Window Frame 2/97\n\nApplicability: Airbus A320, models \\-111 and \\-211, with manufacturer’s serial number (MSN) 002 to 004 and 023 without Airbus Industrie Modification 20473 incorporated.\n\nRequirement: Inspect, from outside the aircraft, the sliding window frame in accordance with Airbus Industrie SB A320-53-1065. Inspect left and right window frame for MSN 002, right side for MSN 003 and MSN 004, and left side for MSN 023.\n\nNote: French DGAC AD 96-235-088(B) refers.\n\nCompliance: Inspect before exceeding 20 000 flights. Re-inspect at intervals not exceeding 13 000 flights.\n\nThis Airworthiness Directive takes effect on 30 January 1997.\n\nBackground: During the forward fuselage fatigue test, damage was detected on the left sliding window frame. This directive is issued to detect cracks in this area at an early stage to maintain structural integrity.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted airworthiness directive addressing a specific structural defect discovered during testing. It has not expanded beyond its original purpose of ensuring the safety of window frames on four specific aircraft."},"complexity_factors":["Very short document (under 200 words)","Only 4 specific aircraft serial numbers affected","Single technical requirement with clear compliance deadlines","No defined terms section or interpretation provisions","No cross-references to other legislation (only references an Airbus technical bulletin and a French aviation authority document)","Simple conditional logic: if aircraft matches serial numbers and lacks modification, then inspect"],"plain_english_summary":"This is a **safety inspection order** for specific Airbus A320 aeroplanes.\n\n**What it does:**\n- Requires airlines to inspect the **sliding window frames** on certain Airbus A320 aircraft for cracks.\n- The inspection must be done from outside the plane, following specific technical instructions from Airbus (Service Bulletin A320-53-1065).\n\n**Who it affects:**\n- Only applies to **four specific aircraft** with serial numbers 002, 003, 004, and 023.\n- Only applies to models -111 and -211 that **haven't** had a specific factory modification (Modification 20473) installed.\n- Different sides need checking for different planes: both sides for MSN 002, right side only for MSN 003 and 004, and left side only for MSN 023.\n\n**When to comply:**\n- First inspection must happen **before the plane reaches 20,000 flights**.\n- After that, re-inspect **every 13,000 flights**.\n\n**Why it matters:**\n- Cracks were found in this area during fatigue testing. These inspections catch problems early to prevent structural failures that could endanger passengers and crew.\n\n**What triggered this:**\n- Damage was discovered during stress testing of the aircraft's forward fuselage (the front section of the plane's body)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope aligns with the stated purpose in the Background: it targets detection of cracks in sliding window frames by prescribing inspections for a specific subset of A320-series aircraft (those MSNs without Modification 20473). The instrument does not expand or narrow that stated intent within the text; it limits application to listed MSNs and specifies inspection method and intervals (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow technical scope limited to specific MSNs and absence of Airbus Modification 20473 (Applicability)","Requirement references an external technical document (Airbus SB A320-53-1065) rather than containing procedural detail (Requirement)","Two-step timing rule: initial inspection before 20,000 flights and repeating inspections at intervals not exceeding 13,000 flights (Compliance)","Specificity of which side/window to inspect varies by MSN (Requirement)","No detailed remediation steps or who must perform the work are specified in the AD text, leaving some implementation discretion to operators (Requirement)"],"plain_english_summary":"CASA requires external inspections of the sliding window frames on a narrowly defined set of Airbus A320‑series aeroplanes that lack Airbus Modification 20473, following Airbus Service Bulletin A320‑53‑1065.  \n\nThe rule—initial check before 20,000 flights and repeats at intervals not exceeding 13,000 flights—aims to detect cracking found in a fatigue test; affected operators must fund and schedule inspections and any repairs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-76-sliding-window-frame","history":"/api/acts/ad-a320-76-sliding-window-frame/history","analysis":"/api/acts/ad-a320-76-sliding-window-frame/analysis","conflicts":"/api/acts/ad-a320-76-sliding-window-frame/conflicts","importantCases":"/api/acts/ad-a320-76-sliding-window-frame/important-cases","documents":"/api/acts/ad-a320-76-sliding-window-frame/documents"}}