{"id":"F2006B02743","name":"AD/B727/42 - Door Mounted Escape Slide Component - Modification","slug":"ad-b727-42-door-mounted-escape-slide-component-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42085,"registerId":"commonwealth-F2006B02743-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/42 - Door Mounted Escape Slide Component - Modification","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/B727/42 Door Mounted Escape Slide Component - Modification\n\n\n4/67\n\n \n\nApplicability: All models. Document: Boeing SB No. 25-78. 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 door-mounted escape slide modifications for one aircraft type. It has not expanded beyond its original purpose; Airworthiness Directives are inherently narrow, reactive instruments addressing specific technical defects."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies entirely on external reference to Boeing Service Bulletin 25-78","No conditional logic or exceptions — single universal applicability ('All models')","Single cross-reference only (to Boeing SB No. 25-78)","Simple imperative structure: applicability + document reference + compliance deadline","No nested provisions or subsections"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of **Boeing 727 aircraft** to modify the **door-mounted escape slides** (the inflatable evacuation chutes used in emergencies). The modification must follow **Boeing Service Bulletin No. 25-78**.\n\n**Who it affects:** Anyone who owns or operates any model of Boeing 727 aeroplane in Australia.\n\n**When it must be done:** **Forthwith** — meaning immediately, without delay. This indicates an urgent safety issue.\n\n**Why it matters:** Escape slides are critical safety equipment. If they fail during an emergency evacuation, passengers and crew could be trapped or injured. This directive addresses a specific defect or weakness in the slide components that Boeing identified, requiring a fix to ensure the slides deploy properly when needed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text as supplied applies the modification requirement to all Boeing 727 models and requires immediate compliance per Boeing SB No. 25-78. There is no indication in the supplied text that the scope has been expanded or narrowed from the directive's stated applicability; therefore the scope has not changed from what the AD itself sets out (\"Applicability: All models\"; \"Compliance: Forthwith\")."},"complexity_factors":["Directive is short and prescriptive: mandates a single modification with immediate compliance.","Relies on an external technical document (Boeing SB No. 25-78) for implementation details not reproduced in the AD.","Universal applicability to all models increases operational impact across all operators of the type (\"Applicability: All models\").","Immediate timeframe (\"Forthwith\") restricts scheduling flexibility and raises logistical pressure.","Lack of technical detail and absence of costs, penalties or staged timelines in the AD requires operators to consult additional sources and regulatory practice for enforcement and recording of compliance."],"plain_english_summary":"This AD mandates an immediate (\"Forthwith\") modification to the door‑mounted escape slide on all Boeing 727 models, requiring operators and maintenance organisations to carry out the work specified in Boeing Service Bulletin No. 25‑78. It affects every 727 owner/operator, who bears the cost and scheduling impact (parts, labour, downtime), while the Civil Aviation Safety Authority enforces compliance; technical steps must be obtained from and followed in the referenced service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification","history":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification/history","analysis":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification/analysis","conflicts":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification/conflicts","importantCases":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification/important-cases","documents":"/api/acts/ad-b727-42-door-mounted-escape-slide-component-modification/documents"}}