{"id":"F2013L01750","name":"AD/B737/42 Amdt 1 — Escape Slide Release Cable","slug":"ad-b737-42-amdt-1-escape-slide-release-cable","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":127803,"registerId":"commonwealth-F2013L01750-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/42 Amdt 1 | Escape Slide Release Cable | 20/2013 |\n| ----------------- | -------------------------- | ------- |\n\n| Applicability: | All models, equipped with escape slide release cables.                                                                                                                                                                                                                                                                                                                                                                |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA Airworthiness Directive (AD) 90-12-11 R1 Amdt 39-6683.                                                                                                                                                                                                                                                                                                    |\n|                | This AD effectivity excludes forward entry and service doors that have been modified with the new chain assembly in accordance with Boeing Service Bulletin737-25A1270 Revision 2.This AD effectivity excludes Model 737-600/700/800 airplanes.                                                                                                                                                                       |\n| Compliance:    | As specified in the Requirement document.The effective date of this Amendment is 30 September 2013.                                                                                                                                                                                                                                                                                                                   |\n| Background:    | Country of origin AD. Frayed and broken cables if not replaced could result in an escape slide not releasing from the door and blocking the exit during an emergency evacuation.This amendment is issued to exempt aircraft fitted with a release latch device with a chain design instead of a cable from inspection. The cable is susceptible to fraying while the chain design has eliminated the fraying problem. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n19 September 2013","sortOrder":0},{"sectionNumber":"AD/B737/42 Amdt 1","sectionType":"part","heading":"AD/B737/42 Amdt 1","content":"## AD/B737/42 Amdt 1","sortOrder":1},{"sectionNumber":"Escape Slide Release Cable","sectionType":"part","heading":"Escape Slide Release Cable","content":"## Escape Slide Release Cable","sortOrder":2},{"sectionNumber":"20/2013","sectionType":"part","heading":"20/2013","content":"## 20/2013","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment narrows the AD's application by exempting doors fitted with the chain‑design release latch (per Boeing Service Bulletin 737‑25A1270 Rev 2) from inspection, and by excluding Model 737‑600/700/800 aircraft. This removes aircraft/doors from the original inspection/replacement requirement (Requirement/Background/Applicability)."},"complexity_factors":["Cross-reference to an external FAA Airworthiness Directive (90‑12‑11 R1) for technical steps (Requirement) creates dependence on another instrument for substantive action.","Exemptions based on retrofit status (chain assembly per Boeing Service Bulletin 737‑25A1270 Rev 2) require operators to verify modification history (Requirement/Background).","Model-based exclusions (737‑600/700/800) add a scope filter operators must check (Applicability/Requirement).","Compliance mechanics are delegated to the FAA AD text rather than reproduced, concentrating technical detail outside this instrument (Requirement/Compliance).","Effective date and compliance timing are referenced but determined by the FAA AD, creating potential coordination and scheduling tasks for operators (Compliance)."],"plain_english_summary":"This instrument requires operators of Boeing 737 aeroplanes fitted with escape slide release cables to carry out the actions set out in FAA Airworthiness Directive 90‑12‑11 R1 (Requirement) to prevent slides being blocked by frayed or broken cables (Background). Operators pay for inspections or replacements and are exempted if their forward entry/service doors have the chain assembly per Boeing Service Bulletin 737‑25A1270 Rev 2, or if the aeroplane is a 737‑600/700/800 (Applicability/Requirement/Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment narrows the scope of the original directive. The original AD/B737/42 applied more broadly to escape slide release cables. Amendment 1 specifically excludes: (1) forward entry and service doors modified with the new chain assembly per Boeing Service Bulletin 737-25A1270 Rev 2, and (2) entire Model 737-600/700/800 series. The scope has contracted to focus only on aircraft still using the problematic cable design."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive exclusion clauses","Single cross-reference to external FAA directive (AD 90-12-11 R1)","No defined terms section","Simple conditional logic: 'All models... EXCEPT...'","Straightforward compliance requirement (follow the FAA document)"],"plain_english_summary":"This mandatory airworthiness directive requires operators of most Boeing 737s to follow FAA AD 90-12-11 R1 to inspect and repair emergency escape slide release cables to ensure slides detach properly during evacuations. \n\nIt excludes 737-600/-700/-800 models and any doors already fitted with the upgraded chain assembly, because chains eliminate the fraying failure mode that can trap passengers."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable","history":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable/history","analysis":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable/analysis","conflicts":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable/conflicts","importantCases":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable/important-cases","documents":"/api/acts/ad-b737-42-amdt-1-escape-slide-release-cable/documents"}}