{"id":"F2006B03399","name":"AD/B767/45 - Off-Wing Evacuation System","slug":"ad-b767-45-off-wing-evacuation-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42940,"registerId":"commonwealth-F2006B03399-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/45 - Off-Wing Evacuation System","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBoeing 767 Series Aeroplanes\n\nAD/B767/45 Off-Wing Evacuation System 11/90\n\nApplicability: Model 767 series with manufacturers variable numbers VB051 through VB055, VE061 through VE063, VE066 through VE069, and VN081 through VN 084.\n\nRequirement: 1. Unless already accomplished, modify the off-wing evacuation system in accordance with Boeing Service Bulletin 767-25-0120.\n\n2. Unless already accomplished, modify the off-wing evacuation system by replacing the escape system actuator in accordance with Boeing Alert Service Bulletin 767- 25A 0131 or Boeing Service Bulletin 767-25-0011 Revision 2 or Revision 3.\n\nNote: FAA AD 90-15-05 Amdt 39-6654 refers.\n\nCompliance: Prior to 1 January 1992.\n\nBackground: This AD is issued in response to reports of failures of the evacuation system due to installation errors and equipment malfunctions.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive’s scope aligns with the instrument’s stated safety purpose: it targets a defined set of Boeing 767 airframes and prescribes specific technical corrections to the off-wing evacuation system and actuator in response to reported failures. The AD does not expand beyond those identified models or require unrelated modifications; it prescribes OEM service-bulletin-based corrective work to address installation errors and equipment malfunctions as stated in the Background."},"complexity_factors":["Technical specificity: required compliance with detailed Boeing service bulletins that will require skilled maintenance work (Requirement 1; Requirement 2).","Multiple discrete serial/manufacturer-variable ranges, requiring accurate identification of affected airframes (Applicability).","Two separate mandatory actions (modify system and replace actuator) with alternative service bulletin options for the actuator replacement (Requirement 1; Requirement 2).","Hard compliance deadline (prior to 1 January 1992) forcing scheduling and potential operational disruption (Compliance).","Cross-reference to an FAA airworthiness directive, creating alignment obligations and potential for differing regulatory interpretations (Note)."],"plain_english_summary":"What this instrument does (mechanically)\n\n- Requires owners/operators of certain Boeing 767 aeroplanes to modify the off-wing evacuation system. The required work is specified by Boeing Service Bulletin 767-25-0120 (Requirement 1). (Applicability; Requirement 1)\n- Requires replacement of the escape system actuator on the same set of aeroplanes, in accordance with Boeing Alert Service Bulletin 767-25A0131 or Boeing Service Bulletin 767-25-0011 Revision 2 or Revision 3. (Requirement 2)\n- Requires those modifications to be completed before 1 January 1992. (Compliance)\n\nWho is affected\n\n- The AD applies to Model 767 series aeroplanes identified by manufacturer variable numbers VB051–VB055, VE061–VE063, VE066–VE069, and VN081–VN084. Operators of those specific aircraft are the parties obliged to comply. (Applicability)\n\nWhy it matters (stated source reason and practical implications)\n\n- The AD was issued because of reported failures of the evacuation system attributable to installation errors and equipment malfunctions. The stated purpose is to correct the evacuation system and replace the actuator to address those failures. (Background)\n\nPractical mechanics, incentives and costs\n\n- Who decides: the Civil Aviation Safety Authority (CASA) issued the airworthiness directive and sets the compliance requirement. The AD relies on Boeing service bulletins to define the technical steps. (header; Requirement 1; Requirement 2)\n- Who pays and who acts: aircraft owners/operators of the listed 767s must arrange and pay for the modifications and actuator replacement. The AD does not specify funding or supplier arrangements; operators must source parts and labour consistent with the Boeing service bulletins. (Applicability; Requirement 1; Requirement 2)\n- Behaviour change required: operators must schedule the specified maintenance/installation work and complete it before the compliance date. That may require aircraft downtime, procurement of parts, and certified technical work per the service bulletins. (Requirement 1; Requirement 2; Compliance)\n\nTrade-offs, implementation risk and compliance burden\n\n- Trade-offs: the AD imposes a near-term cost (parts, labour, out-of-service time) on operators in order to mitigate the reported evacuation system failures. (Requirement 1; Requirement 2; Background)\n- Implementation risk: the Background notes failures due to installation errors; this indicates a risk that improper compliance could leave problems uncorrected, so compliance requires competent, documented installation work. (Background)\n- Compliance burden: operators must identify affected airframes by the manufacturer variable numbers listed, obtain and follow the specified Boeing service bulletins, and meet the compliance deadline. The AD references an FAA AD, implying alignment with the FAA's corrective action but does not alter the technical means specified. (Applicability; Requirement 1; Requirement 2; Note)\n\nEffects on markets and private choice (source-grounded)\n\n- The AD narrows in on a particular technical fix for a defined set of aircraft. Operators of those aircraft lose some operational flexibility until they complete the mandated modifications; costs and scheduling obligations fall on them. The technical instructions come from Boeing service bulletins, so implementation typically involves following OEM-prescribed procedures. (Applicability; Requirement 1; Requirement 2)\n\nSource references: Applicability; Requirement 1; Requirement 2; Compliance; Background; Note."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited airworthiness directive with narrow applicability. It addresses a specific safety defect in specific aircraft and does not represent scope creep from any original intent. The document is complete and self-contained."},"complexity_factors":["Very short document (under 200 words)","Only 2 substantive requirements with clear alternatives specified","Limited applicability (16 specific aircraft serial numbers listed explicitly)","No defined terms section","No cross-referencing to other legislation beyond a single note about the corresponding FAA directive","Simple conditional logic ('unless already accomplished')","Single compliance date with no exceptions or phased implementation"],"plain_english_summary":"This is a **safety order for specific Boeing 767 aircraft** requiring urgent fixes to their emergency exit systems.\n\n**What it does:**\n- Orders owners/operators of certain Boeing 767 planes (specific serial numbers only) to repair or upgrade their **off-wing evacuation systems** — the emergency slides and escape equipment for exits over the wings.\n\n**Who must comply:**\n- Only applies to 16 specific aircraft with serial numbers VB051-VB055, VE061-VE063, VE066-VE069, and VN081-VN084.\n\n**What must be done:**\n- **Modification 1:** Update the evacuation system following Boeing Service Bulletin 767-25-0120 (unless already done).\n- **Modification 2:** Replace the escape system actuator (a mechanical component that deploys the slide) following one of three specified Boeing bulletins (unless already done).\n\n**Deadline:**\n- All work must be finished **before 1 January 1992**.\n\n**Why it matters:**\n- The order was triggered by reports of evacuation system failures caused by **installation mistakes and equipment malfunctions**. In an emergency, a failed evacuation slide could trap passengers or delay escape, with potentially fatal consequences.\n\n**What is an Airworthiness Directive (AD)?**\n- A legally binding safety order issued by the Civil Aviation Safety Authority (CASA). Aircraft cannot legally fly unless they comply with all applicable ADs. Think of it as a mandatory safety recall for aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-45-off-wing-evacuation-system","history":"/api/acts/ad-b767-45-off-wing-evacuation-system/history","analysis":"/api/acts/ad-b767-45-off-wing-evacuation-system/analysis","conflicts":"/api/acts/ad-b767-45-off-wing-evacuation-system/conflicts","importantCases":"/api/acts/ad-b767-45-off-wing-evacuation-system/important-cases","documents":"/api/acts/ad-b767-45-off-wing-evacuation-system/documents"}}