{"id":"F2006B03015","name":"AD/B747/113 - Fire Protection Plumbing and Wiring","slug":"ad-b747-113-fire-protection-plumbing-and-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42374,"registerId":"commonwealth-F2006B03015-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/113 - Fire Protection Plumbing and Wiring","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/B747/113 Fire Protection Plumbing and Wiring 8/92\n\nApplicability: All 747-400 series aircraft identified in the following Boeing Service Bulletins:\n\n    747-26-2143 Revision 1 dated 15 August 1991,\n\n    b. 747-26-2164 dated 14 February 1991, and\n\nc. 747-26-2168 dated 28 March 1991.\n\nRequirement: Action in accordance with the following Boeing Service Bulletins:\n\n    747-26-2143 Revision 1 dated 15 August 1991,\n\n    b. 747-26-2164 dated 14 February 1991, and\n\nc. 747-26-2168 dated 28 March 1991.\n\nNote: FAA AD 92-08-12 Amendment 39-8223 refers.\n\nCompliance: Within 24 months of the effective date of this Directive.\n\nBackground: The FAA has received reports of crossed wiring and plumbing in the cargo compartment smoke detection system and engine fire extinguishing systems on Boeing aircraft of similar design. This directive requires action to modify both the cargo compartment and engine fire detection and extinguishing systems. Incorrectly installed fire detection and extinguishing systems could result in the failure to properly detect or extinguish a fire in the cargo compartment or in an engine.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing specific wiring and plumbing defects in Boeing 747-400 fire protection systems. It has not expanded beyond this technical safety fix."},"complexity_factors":["Very short document (approximately 200 words)","Only 3 defined applicability criteria (the Boeing Service Bulletins)","Single compliance requirement with clear deadline (24 months)","No nested exceptions or conditional logic","No cross-references to other legislation beyond a single note about the corresponding FAA directive","Straightforward cause-and-effect: identified fault → mandatory repair → safety outcome"],"plain_english_summary":"This CASA Airworthiness Directive mandates operators of certain Boeing 747-400s to inspect and correct crossed or incorrectly installed wiring and plumbing in cargo smoke-detection and engine fire-extinguishing systems, using three Boeing Service Bulletins. Compliance is required within 24 months.\n\nIt’s mandatory because misrouted wires or pipes can prevent smoke detection or fire suppression, creating a severe safety risk to passengers, crew and aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains targeted to the 747-400 series aircraft identified in the listed Boeing Service Bulletins and requires those specific modifications (Applicability; Requirement). The instrument does not expand applicability beyond those identified aircraft or add unrelated obligations; it directs operators to follow manufacturer procedures within a 24‑month compliance period (Compliance)."},"complexity_factors":["Technical safety-critical work on fire detection and extinguishing systems (Background).","Applicability limited to aircraft identified in specific Boeing Service Bulletins, requiring accurate fleet identification and records (Applicability).","Mandatory compliance with multiple manufacturer Service Bulletins rather than a single prescriptive alteration, creating dependence on SB content and operator interpretation (Requirement).","Fixed compliance window of 24 months that creates scheduling and potential aircraft downtime for operators (Compliance).","Cross-reference to a corresponding FAA Airworthiness Directive, implying coordination with foreign authority findings and potential differences in implementation detail (Note / Background).","Regulatory basis under Civil Aviation Regulations Part 39 (header) — an enforceable Airworthiness Directive rather than advisory guidance."],"plain_english_summary":"**Requires modification of cargo-compartment and engine fire detection and extinguishing plumbing and wiring on specified Boeing 747-400 series aeroplanes by following the listed Boeing Service Bulletins; compliance is required within 24 months.** It affects the owners/operators of those aircraft, who must arrange and fund the work; the Directive responds to reports that crossed wiring/plumbing could stop a fire being detected or extinguished (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring","history":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring/history","analysis":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring/analysis","conflicts":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring/conflicts","importantCases":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring/important-cases","documents":"/api/acts/ad-b747-113-fire-protection-plumbing-and-wiring/documents"}}