{"id":"F2006B03086","name":"AD/B747/185 - Main Fuel Tank Boost Pump Wiring Teflon Sleeving","slug":"ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42445,"registerId":"commonwealth-F2006B03086-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/185 - Main Fuel Tank Boost Pump Wiring Teflon Sleeving","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 747 Series Aeroplanes\n\n \n\n# AD/B747/185 Main Fuel Tank Boost Pump Wiring Teflon Sleeving\n\nApplicability: All Model 747 aircraft line positions 0001 to 1145 inclusive. Requirement: 1. Unless previously accomplished in accordance with AD/B747/171 (any\n\n# 10/98\n\nDM\n\namendment) perform a one-time visual inspection to confirm installation of Teflon sleeves over the electrical wires to the boost pumps installed inside the conduits in the numbers 1 and 4 main fuel tanks in accordance with Boeing Message M-7200- 98-01080, dated 18 March 1998.\n\n2.    If any Teflon sleeve is found to be missing during the inspection required by Requirement 1 of this AD inspect to detect damage to the wires in accordance with Boeing Message M-7200-98-01080.\n\n \n\n1. If damage is not found, install a Teflon sleeve in accordance with Boeing Message M-7200-98-01080.\n\n\n \n\n3.    If any damaged wiring is found, inspect the conduits in accordance with Boeing Message M-7200-98-01080.\n\n \n\n1. If conduit damage is not found, replace any damaged wiring and install a Teflon sleeve in accordance with Boeing Message M-7200-98-01080.\n\n\n \n\nb.   If any conduit damage is found, replace any damaged wiring and the conduit ensuring that a Teflon sleeve is installed, in accordance with Boeing Message M-7200-98-01080.\n\n \n\nNote: FAA AD 98-10-10 Amdt 39-10522 refers.\n\n \n\nCompliance: 1. Within 60 days of the effective date of this AD.\n\n \n\n2.    Before next flight following the Requirement 1 inspection.\n\n \n\n3.    Before next flight following the Requirement 1 inspection. This airworthiness directive becomes effective on 22 July 1998.\n\nBackground  This AD requires a one-time inspection to confirm the installation of Teflon sleeves over certain electrical wires inside conduits installed in the fuel tanks, and corrective actions if found necessary. This action is prompted by a report of missing Teflon sleeves which protect the wiring insulation from chaffing. Requirements of this AD were considered to be covered by AD/B747/171 Amdt 3, but have been separated for clarity and to align with the FAA ADs.\n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD splits requirements that were previously considered covered by AD/B747/171 Amdt 3 into a standalone directive \"for clarity and to align with the FAA ADs\" (Background). The separation clarifies presentation but does not indicate a substantive expansion or narrowing of the originally covered actions."},"complexity_factors":["Technical subject‑matter: safety‑critical fuel tank wiring and boost‑pump systems.","Conditional, stepwise requirements based on inspection outcomes (sleeve present/missing; wiring damaged/not damaged; conduit damaged/not damaged).","Mandated compliance with an external Boeing message (M‑7200‑98‑01080) as the technical standard.","Cross‑reference to prior AD (AD/B747/171) and to FAA AD 98‑10‑10, creating regulatory linkage.","Short timeframes: some corrective actions mandatory before next flight and overall compliance within 60 days.","Broad applicability: all Model 747 line positions 0001–1145, exposing many operators to the requirement."],"plain_english_summary":"Requires a one‑time visual inspection verifying Teflon sleeves on boost‑pump electrical wiring inside conduits in the No.1 and No.4 main fuel tanks of applicable Boeing 747s. Missing or damaged sleeves, wiring or conduits must be repaired or replaced and sleeves fitted per Boeing Message M‑7200‑98‑01080, with some work required before the next flight and full compliance within 60 days.\n\nThis action was prompted by reports of missing Teflon sleeves. Aircraft operators must carry out and fund the work; CASA enforces compliance."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope. It was issued specifically to address the Teflon sleeve installation issue in 747 fuel tank wiring, and the background explicitly states this was separated from a previous directive (AD/B747/171) purely for clarity and to align with US FAA directives. There is no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Short, single-purpose directive with only 3 main requirements","Simple conditional logic (if-then structure) with only two levels of nesting","No defined terms section — uses plain language and references external Boeing documents","Minimal cross-referencing (only references one previous Australian AD and one FAA AD in a note)","Clear applicability statement limiting scope to specific production line numbers","Straightforward compliance dates (fixed 60-day window or before next flight)"],"plain_english_summary":"This safety order requires operators of early-to-mid production Boeing 747s (line positions 0001–1145) to inspect fuel-tank wiring to confirm protective Teflon sleeves are installed over pump conductors, and to repair or replace wiring and conduits as needed before flight. The initial check must occur within 60 days. CASA issued the directive to prevent wiring chafing that could cause sparks, fires, or explosions, aligning with an FAA safety notice."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving","history":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving/history","analysis":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving/analysis","conflicts":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving/conflicts","importantCases":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving/important-cases","documents":"/api/acts/ad-b747-185-main-fuel-tank-boost-pump-wiring-teflon-sleeving/documents"}}