{"id":"F2006L03259","name":"AD/B727/135 Amdt 2 - Main Deck Cargo Compartment","slug":"ad-b727-135-amdt-2-main-deck-cargo-compartment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60621,"registerId":"commonwealth-F2006L03259-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 727 Series Aeroplanes","sectionType":"division","heading":"Boeing 727 Series Aeroplanes","content":"### Boeing 727 Series Aeroplanes\n\n| AD/B727/135 Amdt 2 | Main Deck Cargo Compartment | 12/2006 DM |\n| ------------------ | --------------------------- | ---------- |\n\n| Applicability: | Model 727 equipped with a main deck class B cargo compartment with a volume exceeding 5.66 cubic metres (200 cubic feet).                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action IAW the technical requirements of FAA AD 93-07-15 Amdt 39-8547. However, for the carriage of livestock, an alternative configuration which establishes an equivalent level of safety would be acceptable to the authority.                                                                                                                                                                                                                                                                                                               |\n| Compliance:    | As specified in the Requirement Document with a revised effective date 22 July 1993 for Australian registered aircraft.Note: The compliance date of this airworthiness directive remains unchanged by this amendment.                                                                                                                                                                                                                                                                                                                           |\n|                | This Amendment becomes effective on 29 September 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | Following the loss of a Boeing model 747-200 “Combi” aircraft that developed a major fire on the main deck cargo compartment, the FAA carried out an evaluation of fire protection requirements of such aircraft. The conclusion indicated that the fire protection requirements for Class B cargo compartments are inadequate.This amendment has been raised to allow for an alternate means of compliance when carrying livestock in a Class B cargo compartment.Amendment 1 was raised to apply FAA AD 93-07-15 which supersededAD 91-10-02. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n27 September 2006","sortOrder":0},{"sectionNumber":"AD/B727/135 Amdt 2","sectionType":"part","heading":"AD/B727/135 Amdt 2","content":"## AD/B727/135 Amdt 2","sortOrder":1},{"sectionNumber":"Main Deck Cargo Compartment","sectionType":"part","heading":"Main Deck Cargo Compartment","content":"## Main Deck Cargo Compartment","sortOrder":2},{"sectionNumber":"12/2006 DM","sectionType":"part","heading":"12/2006 DM","content":"## 12/2006 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment modifies scope by permitting an alternative configuration for carrying livestock in a Class B main-deck cargo compartment, provided it establishes an equivalent level of safety acceptable to the authority. Previously the Australian amendment applied FAA AD 93-07-15; the change introduces regulator discretion to accept alternate means of compliance for livestock carriage."},"complexity_factors":["Cross-reference to an external technical instrument (FAA AD 93-07-15) — requires operators to implement measures set out outside the Australian instrument","Technical airworthiness/fire-protection requirements (implementation may involve engineering modifications and inspections)","Authority discretion to accept alternative configurations for livestock carriage (evaluative burden on operator and regulator)","Narrow applicability by aircraft model and cargo-compartment volume (Model 727 with main-deck Class B compartment > 5.66 m³)","Multiple compliance dates and amendment history referenced (revised effective date 22 July 1993; this amendment effective 29 September 2006)","Safety rationale tied to a specific accident review (747‑200 Combi main‑deck fire) which underpins the directive","Operational implication for carriage of livestock — need to demonstrate an 'equivalent level of safety' creates assessment and certification work"],"plain_english_summary":"This directive requires Boeing 727 aeroplanes with a main-deck Class B cargo compartment larger than 5.66 m³ to meet the technical measures of FAA AD 93‑07‑15. It keeps the existing compliance date for Australian-registered aircraft and allows an alternative cargo configuration for carriage of livestock if the Australian authority accepts it as providing an equivalent level of safety.\n\nThe amendment follows an FAA review after a 747‑200 Combi main‑deck fire, which concluded Class B fire protection was inadequate."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of fire safety regulation for cargo compartments. The amendment adds a specific exception for livestock transport but does not expand the directive's coverage to new aircraft types, new operational phases, or new regulatory domains. The core purpose — ensuring adequate fire protection in Class B cargo compartments — remains unchanged since the original AD 91-10-02."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words)","Only 1 defined term implied ('Class B cargo compartment' — industry standard term, not defined here)","Single cross-reference to external FAA directive (AD 93-07-15)","One conditional exception for livestock carriage with 'equivalent level of safety' test","Minimal procedural requirements — essentially 'comply with US rule unless carrying livestock'"],"plain_english_summary":"This airworthiness directive mandates that Australian-registered Boeing 727s with main-deck cargo compartments over 200 cu ft meet fire protection requirements based on FAA AD 93-07-15, introduced after a fatal Combi cargo fire.  \n\nIt affects owners, operators and anyone transporting livestock on these aircraft, and now permits an alternative livestock-specific safety arrangement if it provides an equivalent level of fire protection."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment","history":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment/history","analysis":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment/analysis","conflicts":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment/conflicts","importantCases":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment/important-cases","documents":"/api/acts/ad-b727-135-amdt-2-main-deck-cargo-compartment/documents"}}