{"id":"F2006B01901","name":"AD/A320/158 - Flight Controls - Spoiler Actuators","slug":"ad-a320-158-flight-controls-spoiler-actuators","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41110,"registerId":"commonwealth-F2006B01901-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\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\n![](image.001.png)\n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/A320/158 Flight Controls - Spoiler Ac","sectionType":"part","heading":"AD/A320/158 Flight Controls - Spoiler Actuators 10/2004","content":"# AD/A320/158 Flight Controls \\- Spoiler Actuators 10/2004\n\nApplicability: AIRBUS A318, A319, A320 and A321 aircraft, fitted with GOODRICH spoiler actuators part number (PN) 31077-050, -060, -070, -110 or -112.\n\nRequirement: 1. Identify the spoiler actuator PN for:\n\n    \\- position No 2, 3, 4, 5 for A318 and A319,\n\n    \\- position No 2 for A320,\n\n    \\- position No 2, 3 and 4 for A321;\n\nand if necessary, apply the corrective actions in accordance with the instructions of the AIRBUS Service Bulletin (SB) A320-27-1158 or later revisions approved by the French DGAC.\n\n    2. Identify the spoiler actuator PN for:\n\n    \\- position No 1 for A318 and A319,\n\n    \\- position No 1 and 3 for A320 not incorporating AIRBUS modification 26335 and on which SB A320-27-1115 has not been accomplished,\n\n    \\- position No 1, 3, 4 and 5 for A320 incorporating AIRBUS modification 26335 or on which SB A320-27-1115 is accomplished,\n\n    \\- position No 1 and 5 for A321;\n\nand if necessary, apply the corrective actions in accordance with the instructions of SB A320-27-1159 or later revisions approved by the French DGAC.\n\nNote: DGAC AD F-2004-122 refers.\n\nCompliance: For Requirement 1: Unless already accomplished, before July 31, 2005.\n\nFor Requirement 2. Unless already accomplished, before January 31, 2007\\. This Airworthiness Directive becomes effective on 30 September 2004.","sortOrder":1}],"analysis":{"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":4,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific unsafe condition with specific Goodrich spoiler actuators on specific Airbus aircraft. The conditional logic in Requirement 2 (referencing modification status and prior service bulletins) reflects standard aviation maintenance tracking rather than scope creep. The reference to French DGAC approvals is standard practice for aircraft manufactured in Europe."},"complexity_factors":["Multiple aircraft models (A318, A319, A320, A321) with different spoiler position requirements for each model","Two distinct part number ranges with different applicability rules","Requirement 2 contains conditional logic based on whether specific Airbus modifications or Service Bulletins have been incorporated","Cross-reference to French DGAC (Direction Générale de l'Aviation Civile) approval requirements for acceptable repair instructions","Specific positional mapping (spoiler positions 1-5) varies by aircraft model and modification status","Two separate compliance deadlines based on which requirement applies"],"plain_english_summary":"This CASA safety order requires Australian operators and maintenance organisations to inspect — and, if necessary, repair or replace per Airbus Service Bulletins — specific Goodrich spoiler actuators on Airbus A318/A319/A320/A321 aircraft. It targets actuators with certain part-number endings fitted in defined wing positions, reflecting DGAC-approved corrective action. The directive (effective 30 Sep 2004) sets inspection deadlines of 31 Jul 2005 and 31 Jan 2007 to prevent spoiler failures that could compromise landing performance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD stays within its original, narrow safety-remedial purpose: identify whether specific Goodrich spoiler actuator part numbers are installed at listed positions on Airbus A318–A321 aeroplanes and, if so, carry out the corrective actions specified in the referenced Airbus Service Bulletins. It does not expand the scope beyond that target set of parts, aircraft models and spoiler positions; the only open element is procedural (allowing later DGAC-approved SB revisions), which is an operational flexibility rather than a substantive scope change."},"complexity_factors":["Short, single-issue AD with limited length","5 listed affected Goodrich part numbers in Applicability","Model-specific mapping of spoiler positions (different positions for A318/A319/A320/A321)","Two separate requirements with different SB references (A320-27-1158 and A320-27-1159)","Cross-reference to Airbus modification 26335 and SB A320-27-1115 for a limited A320 condition in Requirement 2","Dependency on ‘later revisions approved by the French DGAC’ (regulator-approved revisions vary scope/technique)","Two different compliance deadlines and one effective date","Conditional wording (‘if necessary’ corrective actions)"],"plain_english_summary":"**What this instrument does (mechanics)**\n\n- This Airworthiness Directive (AD) requires operators of certain Airbus A318/A319/A320/A321 aeroplanes to check which Goodrich spoiler actuators are fitted at specified spoiler positions and, if those actuators are the affected part numbers, to carry out the corrective actions set out in the referenced Airbus Service Bulletins (SBs) or later revisions approved by the French aviation authority (DGAC).\n\n- The AD applies only to aircraft fitted with Goodrich spoiler actuators with part numbers 31077-050, -060, -070, -110 or -112 (Applicability).\n\n- Two separate identification/corrective tasks are required, covering different spoiler positions by aircraft model (Requirement 1 and Requirement 2). Each task refers to a particular Airbus Service Bulletin for the corrective action:\n  - Requirement 1: use Airbus SB A320-27-1158 (or later DGAC-approved revision).\n  - Requirement 2: use Airbus SB A320-27-1159 (or later DGAC-approved revision).\n\n- Compliance dates are provided: Requirement 1 must be done by 31 July 2005 (unless already done); Requirement 2 must be done by 31 January 2007 (unless already done). The AD became effective on 30 September 2004 (Compliance).\n\n\n**Who is affected**\n\n- Aircraft operators/owners of AIRBUS A318, A319, A320 and A321 aeroplanes that have Goodrich spoiler actuators with the listed part numbers installed.\n\n**Who decides and how the work is specified**\n\n- The CASA delegate issues and enforces the AD under CASR subregulation 39.1(1). The specific corrective steps are those contained in the named Airbus Service Bulletins (or later revisions approved by the French DGAC). That means the technical content and instructions for the work come from the SBs, while CASA mandates compliance.\n\n\n**Why it matters (purpose claim and practical implications)**\n\n- The AD is issued to correct an identified unsafe condition in certain spoiler actuators (this is the stated reason in the AD background). The practical effect is to ensure affected actuators are identified and corrected or replaced according to the OEM instructions.\n\n- Who pays: aircraft operators bear the direct costs—labour, parts, and aircraft downtime required to identify parts and perform the corrective actions per the SBs (Applicability; Requirements; Compliance).\n\n- Behaviour changes required: operators must inspect maintenance records or physically identify actuator part numbers on the specified spoiler positions, and where the listed PNs are present, follow the Airbus SB instructions to repair/replace/modify as required.\n\n\n**Trade-offs, costs, and implementation considerations**\n\n- Direct costs and operational impact are concentrated on the small set of operators who have the affected Goodrich PN actuators fitted. Operators without those PNs are unaffected.\n\n- The directive channels the corrective work to the procedures in the Airbus Service Bulletins; that focuses technical work on OEM-approved methods and suppliers/repair stations authorised to perform them. This may speed technical compliance but can increase cost or create short-term parts or shop-capacity constraints.\n\n- Timing risk: the AD sets fixed compliance deadlines (two different dates). Operators must schedule inspections and any corrective maintenance within those windows, which can require short-term resourcing and logistics (availability of parts, qualified technicians, and approvals for SB revisions where applicable).\n\n- Regulatory discretion and cross‑reference: the AD requires use of SBs “or later revisions approved by the French DGAC.” That means the specific remedial steps can change if DGAC approves updated SBs; operators must ensure they follow the version authorised by the regulator (Requirement sections).\n\n- Compliance burden: record-keeping and proof of compliance are required for continued airworthiness oversight; operators must retain evidence they inspected the specified positions and performed actions when required.\n\n\n**Concrete references in the AD**\n\n- Applicability: lists the Airbus models and the Goodrich actuator part numbers.\n- Requirement 1 and Requirement 2: specify which spoiler positions to check by model and which SB to use for corrective action (A320-27-1158 and A320-27-1159 respectively).\n- Compliance: sets the deadlines (31 July 2005 and 31 January 2007) and the effective date (30 September 2004).\n\n(Sections referenced above: Applicability; Requirement 1 and 2; Compliance.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators","history":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators/history","analysis":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators/analysis","conflicts":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators/conflicts","importantCases":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators/important-cases","documents":"/api/acts/ad-a320-158-flight-controls-spoiler-actuators/documents"}}