{"id":"F2008L00766","name":"AD/B747/373 - Evacuation System Shear-Pin Restraints","slug":"ad-b747-373-evacuation-system-shear-pin-restraints","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72824,"registerId":"commonwealth-F2008L00766-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/373 | Evacuation System Shear-Pin Restraints | 4/2008 |\n| ----------- | -------------------------------------- | ------ |\n\n| Applicability: | Boeing 747 series aircraft with Goodrich evacuation systems as listed in FAA AD 2008-03-05.                                               |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-03-05.Note: FAA AD 2008-03-05 refers.                                 |\n| Compliance:    | Within 36 months after the effective date of this Airworthiness Directive.                                                                |\n|                | This Airworthiness Directive becomes effective on 10 April 2008.                                                                          |\n| Background:    | This AD results from several reports of corroded shear-pin restraints that prevented Goodrich evacuation systems from deploying properly. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 February 2008","sortOrder":0},{"sectionNumber":"AD/B747/373","sectionType":"part","heading":"AD/B747/373","content":"## AD/B747/373","sortOrder":1},{"sectionNumber":"Evacuation System Shear-Pin Restraints","sectionType":"part","heading":"Evacuation System Shear-Pin Restraints","content":"## Evacuation System Shear-Pin Restraints","sortOrder":2},{"sectionNumber":"4/2008","sectionType":"part","heading":"4/2008","content":"## 4/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in a specific aircraft system. It has not expanded beyond its original purpose of mandating corrosion inspections for shear-pin restraints."},"complexity_factors":["Extremely short document — approximately 150 words of substantive content","No defined terms section — relies entirely on external reference (FAA AD 2008-03-05)","Single, clear compliance obligation with straightforward deadline calculation","No conditional logic, exceptions, or nested provisions","Simple adoption mechanism — 'do what the FAA says' rather than rewriting technical standards","Narrow, specific applicability (one aircraft series, one manufacturer, one system type)"],"plain_english_summary":"This AD mandates that operators of certain Boeing 747s with Goodrich emergency evacuation systems inspect and remedy corroded shear‑pin restraints that can prevent slide deployment. CASA is adopting the FAA’s AD 2008‑03‑05 requirements; affected operators must follow the FAA’s instructions and complete actions within three years of 10 April 2008 (by April 2011). The rule prevents potentially catastrophic evacuation failures."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope aligns with its stated purpose in the Background: it targets Boeing 747 aeroplanes with specified Goodrich evacuation systems and mandates adherence to FAA AD 2008-03-05. It does not expand obligations beyond that listed applicability or introduce additional categories of aircraft or equipment."},"complexity_factors":["Cross-reference to FAA AD 2008-03-05 for technical requirements — operators must obtain and follow a separate external instrument (Requirement).","Narrow applicability to Boeing 747 series with Goodrich evacuation systems listed in the FAA AD — reduces population but requires equipment-level checks (Applicability).","Fixed compliance window of 36 months imposes scheduling and resource allocation for operators and maintenance providers (Compliance).","Technical actions are not specified in this text and are deferred to the FAA AD, creating operational dependence on another document for inspection/repair procedures (Requirement).","Administrative enforcement and effective date set by CASA delegate create clear timelines but require regulatory oversight to confirm compliance (effective date / signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 747 aeroplanes fitted with Goodrich evacuation systems (as listed in FAA AD 2008-03-05) to carry out the FAA AD’s technical instructions. Compliance must occur within 36 months of the directive’s effective date (10 April 2008).\n\nThe AD responds to reports that corroded shear-pin restraints prevented evacuation systems deploying. Operators bear the compliance and maintenance costs and must schedule inspections or remedial work to meet the deadline; CASA enforces the requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints","history":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints/history","analysis":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints/analysis","conflicts":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints/conflicts","importantCases":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints/important-cases","documents":"/api/acts/ad-b747-373-evacuation-system-shear-pin-restraints/documents"}}