{"id":"F2006B03005","name":"AD/B747/104 - Door 3 Evacuation System","slug":"ad-b747-104-door-3-evacuation-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42364,"registerId":"commonwealth-F2006B03005-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/104 - Door 3 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 747 Series Aeroplanes\n\nAD/B747/104 Door 3 Evacuation System 3/92\n\nApplicability: Model 747 series; equipped with BF Goodrich single-piece ramp/slide, part numbers 7A1418-1 through -16 inclusive, for Door 3 evacuation system.\n\nRequirement: Modify the regulator assembly, P/N 4A3474-1 (a sub-assembly of reservoir assembly P/N 4A3416-1), to the P/N 4A3474-2 or 4A3474-3 configuration, by installing improved internal components in accordance with paragraph 2 (Accomplishment Instructions) of BF Goodrich Service Bulletin No 4A3416-25-233, dated\n\n14 December 1990; or Revision 1, dated 1 October 1991.\n\nRe-identify the Door 3 ramp/slide in accordance with paragraph 3.B (Identification) of BF Goodrich Service Bulletin No 4A3416-25-233, dated 14 December 1990; or Revision 1, dated 1 October 1991.\n\nNote: FAA AD 91-25-02 Amdt 39-8103 refers.\n\nCompliance: Prior to 6 March 1993.\n\nBackground: Reports have been received of delayed regulator function during ramp/slide deployment. This condition, if not corrected, could result in loss of use of the Door 3 evacuation system by passengers and crew during an emergency evacuation. The compliance time required by the FAA is extended by two months.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft model's evacuation system. It has not expanded beyond its original purpose of mandating a hardware modification to prevent slide deployment failures."},"complexity_factors":["Single, specific technical requirement with clear part numbers","Only 2 defined part number ranges in the applicability section","Direct reference to one external technical document (BF Goodrich Service Bulletin) rather than embedded instructions","No nested exceptions or conditional logic — applies to all affected aircraft without exemptions","Single compliance deadline with straightforward extension note","Short document (approximately 200 words) with minimal cross-referencing"],"plain_english_summary":"This CASA Airworthiness Directive orders mandatory corrective action for operators of Boeing 747s equipped with BF Goodrich Door 3 evacuation slides. It requires modifying the regulator assembly that can delay slide inflation, updating identification, and following the manufacturer’s service instructions.\n\nIt affects carriers and owners using the specified BF Goodrich slide system because delayed deployment could prevent timely emergency evacuation."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive does not alter which aircraft or equipment are covered or the required modification; it only extends the FAA compliance time by two months as noted in the Background. The core scope (applicability and modification requirement) remains unchanged."},"complexity_factors":["Technical change requires physical modification of a regulator sub‑assembly to precise part numbers (Requirement).","Work must follow an external manufacturer Service Bulletin, including a specified revision option (Requirement).","Applicability limited to specific 747 models fitted with particular ramp/slide P/Ns, requiring fleet checks to identify affected units (Applicability).","Mandatory re‑identification of the ramp/slide introduces a recordkeeping/compliance step (Requirement — Identification).","Fixed compliance deadline (Compliance) and cross‑reference to FAA AD increase coordination and timing constraints (Note; Background)."],"plain_english_summary":"This directive requires operators of Boeing 747s fitted with BF Goodrich single‑piece Door 3 ramp/slides (P/Ns 7A1418‑1 to ‑16) to modify regulator assembly `4A3474‑1` to `4A3474‑2` or `4A3474‑3` and re‑identify the ramp/slide per the BF Goodrich Service Bulletin. It responds to reports of delayed regulator function that could prevent use of Door 3 in an evacuation. Operators must complete the work and record compliance by 6 March 1993 (Applicability; Requirement; Compliance; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-104-door-3-evacuation-system","history":"/api/acts/ad-b747-104-door-3-evacuation-system/history","analysis":"/api/acts/ad-b747-104-door-3-evacuation-system/analysis","conflicts":"/api/acts/ad-b747-104-door-3-evacuation-system/conflicts","importantCases":"/api/acts/ad-b747-104-door-3-evacuation-system/important-cases","documents":"/api/acts/ad-b747-104-door-3-evacuation-system/documents"}}