{"id":"F2006B01881","name":"AD/A320/134 - Fixed Lateral Cockpit Window","slug":"ad-a320-134-fixed-lateral-cockpit-window","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41077,"registerId":"commonwealth-F2006B01881-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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\nAirbus Industrie A319, A320 and A321 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/A320/134 Fixed Lateral Cockpit Window","sectionType":"part","heading":"AD/A320/134 Fixed Lateral Cockpit Window 3/2002","content":"# AD/A320/134 Fixed Lateral Cockpit Window 3/2002\n\nApplicability: All Model A319, A320, and A321 aircraft, fitted with PPG Aerospace fixed lateral cockpit window part number NP-165313-1 or NP-165313-2 having a serial number below 95001H0001 (PPG Aerospace manufacturing date before January 1995).\n\nRequirement: 1. Action in accordance with Airbus Industrie Service Bulletin A320-56-1009.\n\n2. Windows found suspect must be re-inspected, and replaced if necessary, in accordance with Airbus Industrie Service Bulletin A320-56-1009.\n\nNote: DGAC AD 2001-632(B) refers.\n\nCompliance: 1. Within 500 flight hours after 21 March 2002, unless already accomplished.\n\n2. Repeat at intervals not to exceed 500 flight hours, until replacement. This Airworthiness Directive becomes effective on 21 March 2002.\n\nBackground: The DGAC received an in-service report of outer glass ply separation from a fixed lateral cockpit window. Investigation revealed a deficient manufacturing process resulted in moisture ingress between the centre and outer glass ply.\n\n![](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 8 February 2002\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies specifically to A319/A320/A321 aircraft fitted with PPG part numbers NP-165313-1 or NP-165313-2 having serial numbers below 95001H0001 (manufactured before Jan 1995). The instrument does not broaden or narrow that applicability beyond the stated parts/serial range; it imposes inspection/repeat intervals and replacement where necessary consistent with that original scope."},"complexity_factors":["Narrow technical applicability (Applicability): specific aircraft models and narrow part/serial-range (PPG NP-165313-1/2, serials below 95001H0001) limits scope but requires precise part identification.","Procedural reliance (Requirement): mandates compliance with Airbus Service Bulletin A320-56-1009 rather than prescribing steps directly, creating dependency on an external technical document.","Recurring compliance burden (Compliance): inspection interval of 500 flight hours and repeat inspections until replacement imposes ongoing monitoring and record-keeping.","Remediation trigger (Requirement): windows judged 'suspect' must be re-inspected and replaced if necessary, introducing judgment/inspection criteria that can affect maintenance decisions.","Safety-critical outcome (Background): addresses structural integrity risk (outer glass ply separation) tied to a manufacturing defect, elevating priority for timely compliance.","Administrative tracking: operators must record flight hours per airframe/component to meet the specified compliance window and recurring intervals.","Reference to foreign AD (Note): cites DGAC AD 2001-632(B), indicating harmonisation but potential for differing international service expectations."],"plain_english_summary":"**What it does:** Mandates inspection and, if necessary, replacement of certain PPG fixed lateral cockpit windows (part NP-165313-1 or NP-165313-2 with serial numbers below 95001H0001) on A319/A320/A321 aircraft, following Airbus Service Bulletin A320‑56‑1009, with initial and repeat checks every 500 flight hours.\n\n**Who it affects and why it matters:** Operators and maintenance organisations with those windows must track flight hours, inspect for outer-glass ply separation caused by moisture ingress (a manufacturing defect), and replace suspect windows to maintain cockpit window integrity."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific manufacturing defect in specific cockpit windows on specific aircraft. It has not expanded beyond this safety-critical repair mandate."},"complexity_factors":["Single, clearly defined applicability criteria (specific aircraft models, part numbers, and serial number cutoff)","Straightforward two-step requirement structure (initial inspection + recurring inspection)","Only one cross-reference to external document (Airbus Service Bulletin A320-56-1009)","Simple compliance timeline (500 flight hours, recurring)","No nested exceptions or conditional logic","Minimal defined terms (only standard aviation terminology like 'flight hours')"],"plain_english_summary":"This CASA safety order requires urgent inspections of the fixed cockpit side windows on Airbus A319/A320/A321 aircraft fitted with PPG Aerospace windows manufactured before January 1995 (specific part/serial ranges). Operators must follow Airbus Service Bulletin A320-56-1009, inspect within 500 flight hours and repeat every 500 hours until replacement.\n\nThe order responds to moisture entrapment that can separate the outer glass layer, creating a potentially catastrophic in-flight failure; it applies to affected airlines/operators and noncompliance is illegal."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window","history":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window/history","analysis":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window/analysis","conflicts":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window/conflicts","importantCases":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window/important-cases","documents":"/api/acts/ad-a320-134-fixed-lateral-cockpit-window/documents"}}