{"id":"F2006B02729","name":"AD/B727/29 - Flight Spoiler Actuator Support Fitting - Inspection and Replacement","slug":"ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42045,"registerId":"commonwealth-F2006B02729-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/29 - Flight Spoiler Actuator Support Fitting - Inspection and Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 727 Series Aeroplanes\n\n \n\nAD/B727/29  Flight Spoiler Actuator Support Fitting - Inspection and Replacement\n\n\n7/66\n\n \n\nApplicability: All models. Document: Boeing SB No. 57-71. Compliance: Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on a known mechanical defect in Boeing 727 spoiler systems. It has not expanded beyond its original purpose of mandating inspection/replacement of this single component."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies entirely on external technical reference (Boeing SB No. 57-71)","No conditional logic or nested exceptions — single straightforward mandate applicable to all models","Single cross-reference only (to Boeing Service Bulletin)","No procedural subsections, penalty clauses, or administrative detail within the instrument itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:**\nOrders owners and operators of **Boeing 727 aircraft** to inspect and potentially replace the **flight spoiler actuator support fitting** — a structural component that helps control the spoilers (the panels on the wings that disrupt airflow to slow the plane down or reduce lift).\n\n**Why it matters:**\nThis fitting is critical for safe flight control. If it fails, the pilot may lose proper control of the spoilers, creating a serious safety risk during landing or emergency situations.\n\n**Who must comply:**\nAnyone operating a Boeing 727 in Australia — all models are affected.\n\n**What must be done:**\n- **Inspection:** Check the flight spoiler actuator support fitting for damage, wear, or cracks.\n- **Replacement:** Replace the part if it doesn't meet safety standards.\n- **How:** Follow the technical instructions in **Boeing Service Bulletin No. 57-71** (the manufacturer's official repair guide).\n- **When:** **Forthwith** — meaning immediately, without delay. This is the most urgent compliance deadline CASA can set.\n\n**In short:** If you fly or maintain a Boeing 727 in Australia, you must immediately check a specific wing component and fix it if necessary, following Boeing's official instructions."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The extract specifies applicability to ‘All models’ of the Boeing 727 and requires inspection and replacement per Boeing SB No. 57-71 with compliance ‘forthwith’. Based on the supplied text, the AD’s scope is clearly stated and there is no indication within this excerpt that the scope differs from the instrument’s stated applicability."},"complexity_factors":["Brevity of AD: the directive is short and does not contain technical procedures within the text (it refers to an external Boeing service bulletin). (See: “Document: Boeing SB No. 57-71.”)","Cross-reference dependency: implementation requires obtaining and following Boeing SB No. 57-71, adding a step and potential information asymmetry for operators. (See: “Document: Boeing SB No. 57-71.”)","Immediate timing: the “forthwith” compliance deadline increases operational scheduling complexity. (See: “Compliance: Forthwith.”)","Wide scope: applicability to “All models” of the Boeing 727 increases the number of affected operators and variation in aircraft condition. (See: “Applicability: All models.”)","Operational logistics: inspection and possible replacement involve labour, parts procurement and aircraft downtime, which raise coordination complexity for operators and maintenance providers."],"plain_english_summary":"This AD mandates immediate inspection—and replacement if necessary—of the flight‑spoiler actuator support fitting on all Boeing 727 models, by following Boeing Service Bulletin No. 57‑71. It affects 727 operators, their maintenance providers and parts suppliers, who bear inspection, parts, labour and downtime costs. Compliance is required “forthwith,” creating immediate scheduling and resource pressures and relying on access to the referenced Boeing service bulletin and any replacement parts."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement","history":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement/history","analysis":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement/important-cases","documents":"/api/acts/ad-b727-29-flight-spoiler-actuator-support-fitting-inspection-and-replacement/documents"}}