{"id":"F2006B01906","name":"AD/A320/165 - Parking Brake","slug":"ad-a320-165-parking-brake","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41128,"registerId":"commonwealth-F2006B01906-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 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\nAirbus Industrie A319, A320 and A321 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/A320/165 Parking Brake 1/2005","sectionType":"part","heading":"AD/A320/165 Parking Brake 1/2005","content":"# AD/A320/165 Parking Brake 1/2005\n\nApplicability: All Airbus A319, A320 and A321 aeroplanes except those that have Airbus Mod 30062 incorporated during production or Airbus Service Bulletin (SB) A320-32-1201 Rev 1 incorporated in service.\n\nRequirement: Modify the park brake system in accordance with the accomplishment instructions given in Airbus SB A320-32-1201 Rev 1 or later approved revision.\n\nNote: DGAC AD F-2004-137 and EASA Approval 2004-10839 refer.\n\nCompliance: No later than 31 March 2009.\n\nThis Airworthiness Directive becomes effective on 20 January 2005.\n\nBackground: Airbus reported that an operator experienced a loss of parking brake whilst at the holding point of the runway awaiting take-off. This lead to a runway excursion.\n\nAnalysis showed that, as per design, when the parking brake is selected, braking through the pedals is inhibited. A FCOM procedure recommends that in the case of park brake loss the parking brake handle is immediately released to restore braking to the pedals. If this procedure is not followed a situation could develop that would have hazardous consequences. This Directive mandates the modification of the park brake system to prevent such an occurrence.\n\n![](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 1 December 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 22 December 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD addresses a focused safety issue reported by Airbus (loss of parking brake leading to potential loss of pedal braking). The directive's requirements (modify the park brake system for specified aircraft unless already modified) remain within that original safety-remediation purpose. It does not broaden the subject matter or add unrelated obligations beyond implementing the technical fix described in the Airbus service bulletin."},"complexity_factors":["Single, narrow technical requirement (modify parking brake system per one Airbus SB)","One clear applicability carve-out (aircraft with Mod 30062 or SB already incorporated are excluded)","Single compliance deadline and effective date","References external documents (Airbus SB A320-32-1201 Rev 1 or later; DGAC and EASA approvals) but no layered conditional logic","No multiple exceptions or staged compliance steps"],"plain_english_summary":"**What this directive does**\n\n- This Airworthiness Directive (AD) requires modification of the parking brake system on certain Airbus A319, A320 and A321 aeroplanes.\n\n**Who it affects**\n\n- Owners and operators of Airbus A319, A320 and A321 aircraft that have NOT already had Airbus Modification 30062 installed during production, and that have NOT had Airbus Service Bulletin A320-32-1201 Revision 1 (or later approved revision) incorporated in service.\n\n**What precisely must be done**\n\n- The applicable aircraft must have their parking brake systems modified following the instructions in Airbus Service Bulletin A320-32-1201 Rev 1 or a later approved revision (see the Requirement section).\n\n**When it must be done**\n\n- The modification must be completed by 31 March 2009 (Compliance section). The AD itself took effect on 20 January 2005.\n\n**Why the rule exists (official rationale and mechanics)**\n\n- Airbus reported an incident in which an airplane lost its parking brake while holding at the runway threshold, which led to a runway excursion (Background). Analysis showed that, by design, when the parking brake is selected the normal pedal braking is inhibited. If the crew do not immediately release the parking brake handle after a loss of parking brake, braking through the pedals may not be available and a hazardous situation can develop. The AD requires a system modification intended to prevent that loss-of-brake scenario.\n\n**Who pays and who decides**\n\n- Aircraft owners/operators are responsible for arranging and paying for the modification (they must have maintenance personnel or an approved organisation carry out the SB instructions). The Civil Aviation Safety Authority (CASA) issued the AD under subregulation 39.1(1) of CASR 1998 and enforces compliance.\n\n**Practical effects and implementation notes**\n\n- Compliance is achieved by following the detailed technical instructions in the Airbus service bulletin; those instructions determine the exact work, parts and testing required.\n- The AD excludes aircraft that already incorporate Airbus Mod 30062 (installed in production) or that already have the SB incorporated in service, so aircraft already modified are not affected.\n- The AD references related foreign authority approvals (DGAC AD F-2004-137 and EASA Approval 2004-10839), which can matter for accepted maintenance data and for international operators following different regulatory frameworks.\n\n**Trade-offs, burdens and risks**\n\n- Cost and downtime: operators incur the direct cost of the modification (parts, labour, possible aircraft out-of-service time). The AD does not specify cost amounts; the service bulletin defines the work scope.\n- Single technical remedy: compliance requires adopting the SB method or a later approved revision; alternatives would need approval from the regulator.\n- Safety-focused scope: the AD targets a specific functional failure mode (loss of parking-brake-induced inhibition of pedal braking) rather than imposing broader operational limits.\n\n(References: Applicability, Requirement, Compliance and Background sections of the AD.)"},"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 Airworthiness Directive maintains a narrow, targeted scope addressing a specific mechanical safety defect in a defined aircraft fleet. The scope has not expanded beyond the original safety purpose of correcting the parking brake system design flaw."},"complexity_factors":["Single, clearly defined applicability (three specific aircraft models with one explicit exception)","Single requirement referencing external technical document (Airbus Service Bulletin)","Simple compliance deadline (single fixed date)","No nested conditions, cross-references to other legislation, or defined terms section","Background narrative explains the safety rationale in plain language","Total length is approximately one page"],"plain_english_summary":"This is a **safety order** (called an \"Airworthiness Directive\") issued by Australia's aviation safety regulator (CASA) that applies to specific Airbus aircraft models (A319, A320, and A321).\n\n**What it does:**\n- **The problem:** Airbus discovered that if an aircraft's parking brake fails while the plane is waiting to take off, the pilots could lose all braking ability. Normally, when the parking brake is engaged, the foot pedals don't work for braking. If the parking brake then fails and the pilots don't immediately release the parking brake handle (as recommended in the flight manual), the aircraft could roll uncontrollably — which actually happened once, causing a plane to run off the runway.\n\n- **The fix:** Airlines must modify the parking brake system on affected aircraft following specific technical instructions from Airbus (Service Bulletin A320-32-1201 Revision 1 or later).\n\n**Who it affects:**\n- Owners and operators of Airbus A319, A320, and A321 aircraft\n- **Exception:** Aircraft that were built with a specific factory modification (Mod 30062) or that have already had the fix applied (Service Bulletin A320-32-1201 Rev 1) don't need to do anything\n\n**Deadline:** All affected aircraft must be fixed by **31 March 2009**.\n\n**Why it matters:** This prevents a dangerous situation where a plane could roll onto an active runway or off the taxiway due to complete brake failure, protecting passengers, crew, and people on the ground."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-165-parking-brake","history":"/api/acts/ad-a320-165-parking-brake/history","analysis":"/api/acts/ad-a320-165-parking-brake/analysis","conflicts":"/api/acts/ad-a320-165-parking-brake/conflicts","importantCases":"/api/acts/ad-a320-165-parking-brake/important-cases","documents":"/api/acts/ad-a320-165-parking-brake/documents"}}