{"id":"F2006B03018","name":"AD/B747/116 - Strut Firewall Power Feeder Cable Connectors","slug":"ad-b747-116-strut-firewall-power-feeder-cable-connectors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42377,"registerId":"commonwealth-F2006B03018-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/116 - Strut Firewall Power Feeder Cable Connectors","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/B747/116 Strut Firewall Power Feeder Cable Connectors 3/93\n\nApplicability: Boeing 747-400 series aircraft, fitted with Roll Royce engines, identified in Boeing Alert Service Bulletin 747-24A2190 dated 16 November 1992 and not incorporating Boeing Service Bulletin 747-24-2183 dated 28 January 1993 or QANTAS EO 18597.\n\nRequirement: Inspect and repair if necessary, strut firewall power feeder connectors in accordance with Boeing Alert Service Bulletin 747-24A2190 dated 16 November 1992.\n\nNote: FAA AD 92-27-02 Amdt 39-8435 refers.\n\nCompliance: 1. Unless previously accomplished, initial inspection of the firewall connector is to be completed no later than 4 April 1993 and, if the connector is not replaced, thereafter at intervals not to exceed 800 hours time in service.\n\n2. If the firewall connector is replaced, initial inspection of the replacement connector is required prior to the accumulation of 1200 hours time in service and thereafter at intervals not to exceed 800 hours time in service.\n\nNote: Incorporation of Boeing Service Bulletin 747-24-2183 dated 28 January 1993 is considered terminating action for this Directive.\n\nBackground: Three operators have reported damage in 14 strut firewall power feeder connectors on 767/747-400 Rolls Royce engine equipped aircraft. Accomplishment of this Directive will prevent both the possible loss of generator power due to deterioration of the strut firewall feeder connector and possible fires in the engine strut caused by ignition of fuel or fuel vapours from an overheated connector.","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow, aircraft- and engine-specific scope as set out in the Applicability. It prescribes inspection/repair actions and recurring intervals (Compliance) and allows cessation of recurring inspections only if the later Boeing Service Bulletin 747-24-2183 is incorporated (Note). There is no expansion beyond the identified fleet or the specified corrective path in the instrument itself."},"complexity_factors":["Narrow technical scope confined to Boeing 747-400s with Rolls‑Royce engines (Applicability).","Procedural dependence on external Boeing service bulletins for inspection and repair steps (Requirement; Note).","Two different inspection schedules depending on whether connector has been replaced (Compliance 1–2).","A terminating-action clause that removes ongoing inspections if later Boeing Service Bulletin is incorporated (Note).","Safety‑critical consequences (loss of generator power, fire) but straightforward remedial action (Background).","Operational burden on operators to schedule recurring inspections and perform any repairs/replacements."],"plain_english_summary":"This directive requires operators of specified Boeing 747-400 aircraft with Rolls‑Royce engines to inspect and, if necessary, repair strut firewall power‑feeder cable connectors in line with Boeing Alert Service Bulletin 747‑24A2190. Inspections must be completed by 4 April 1993 and repeated at 800‑hour intervals (replacement connectors have an initial inspection at 1,200 hours); incorporation of Boeing Service Bulletin 747‑24‑2183 is a terminating action. Operators bear the cost and scheduling burden; CASA enforces the directive and Boeing’s service bulletins set the technical steps."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly scoped to its original purpose: addressing a specific safety defect in strut firewall power feeder connectors on Boeing 747-400 aircraft with Rolls Royce engines. The document does not show evidence of scope creep; it targets the exact maintenance issue identified in the background (damaged connectors causing power loss and fire risk) with precise applicability and compliance requirements."},"complexity_factors":["Single, specific technical subject matter (one connector type on one aircraft series)","Limited applicability criteria (Boeing 747-400 + Rolls Royce engines + specific service bulletin exclusions)","Straightforward compliance structure with clear deadlines and intervals","Only 2 main compliance pathways (original connector vs replacement connector)","Minimal cross-referencing (one FAA AD reference, two Boeing service bulletins)","No nested definitions or interpretation sections","Single requirement with clear terminating action"],"plain_english_summary":"This airworthiness directive requires operators of Boeing 747-400s with Rolls‑Royce engines to inspect and repair the strut firewall power‑feeder cable connectors — unless the Boeing Service Bulletin 747‑24‑2183 (or QANTAS EO 18597) repair is already embodied.  \n\nConnectors found damaged on multiple aircraft can cause loss of engine generator power or ignite an engine‑strut fire. Initial inspection was mandated by 4 April 1993 (sooner if >800 flight hours since the reference date), with recurring checks every 800 FH; replaced connectors are first checked within 1,200 FH, then every 800 FH, and the SB repair ends the repetitive inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors","history":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors/history","analysis":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors/analysis","conflicts":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors/conflicts","importantCases":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors/important-cases","documents":"/api/acts/ad-b747-116-strut-firewall-power-feeder-cable-connectors/documents"}}