{"id":"F2006B01925","name":"AD/A320/35 - Fuel System Electrical Wiring","slug":"ad-a320-35-fuel-system-electrical-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41147,"registerId":"commonwealth-F2006B01925-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/35 - Fuel System Electrical 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)  \nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/35 Fuel System Electrical Wiring 1/94\n\nApplicability: Model A320-211, \\-212 and \\-213 aircraft with serial numbers 129 to 343, 345 to 347\n\nand 349 to 363.\n\nRequirement: Action in accordance with Airbus Industrie Service Bulletin A320-28-1052 Revision 1 dated 21 October 1993.\n\nNote: DGAC AD 93-191-047(B) dated 27 October 1993 refers.\n\nCompliance: Within 3500 flight cycles from 6 January 1994.\n\nBackground: Airbus Industrie have reported that the cushions on some P-Clips used in the fuel tank may be non fuel resistant and are liable to deteriorate. If the cushion deteriorates the metal of the P-Clip may wear the insulation of the wires in the wire bundle which could in turn cause an electrical arc if the aircraft is struck by lightning. Compliance with this Directive will decrease the likelihood of an electrical arc occurring in the fuel tank.","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 specific aircraft. It has not expanded beyond its original purpose of mitigating fuel tank ignition risks through P-Clip replacement."},"complexity_factors":["Very short document (under 200 words)","Only 3 defined applicability criteria (specific model numbers and serial number ranges)","Single compliance requirement referencing an external technical document (Airbus Service Bulletin)","No nested exceptions or conditional logic","Straightforward deadline calculation (3500 flight cycles from fixed date)","Minimal cross-referencing (one reference to French aviation authority directive DGAC AD 93-191-047(B))"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific Airbus A320 aircraft.\n\n**What it does:**\nOrders airlines and aircraft operators to inspect and replace certain cable clamps (called \"P-Clips\") inside the fuel tanks of specific Airbus planes. These clamps have rubber cushions that can break down when exposed to fuel. If the rubber fails, the metal clamp can rub against electrical wires, wearing away their insulation. If lightning then strikes the aircraft, this could cause a spark inside the fuel tank — a serious fire or explosion risk.\n\n**Who it affects:**\n- **Aircraft:** Airbus A320-211, -212, and -213 models with specific serial numbers (129-343, 345-347, and 349-363)\n- **Operators:** Airlines and owners of these specific aircraft\n- **Action required:** Follow the technical instructions in Airbus Service Bulletin A320-28-1052 Revision 1 (dated 21 October 1993)\n\n**Why it matters:**\nFuel tank explosions are catastrophic. This directive closes a safety gap by ensuring electrical wiring in fuel tanks is properly protected. Operators must complete the fix within 3,500 flight cycles starting from 6 January 1994.\n\n**Key terms explained:**\n- **P-Clip:** A metal clamp used to hold bundles of wires in place, usually lined with rubber or plastic cushioning\n- **Flight cycles:** One takeoff and landing (a measure of aircraft use)\n- **Service Bulletin:** A technical notice from the manufacturer describing maintenance or repair procedures"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text of the AD sets out a specific, limited scope (explicit models and serial numbers) and prescribes compliance via a named Airbus Service Bulletin with a defined compliance interval. The AD text contains no indication that its scope has been expanded, narrowed or otherwise altered from the instruction as issued in this document."},"complexity_factors":["Narrow applicability: specific aircraft models and serial number ranges limit scope (Applicability).","Single prescriptive remedy: compliance is required by reference to a single Airbus Service Bulletin (Requirement).","Clear compliance metric and deadline: 3,500 flight cycles from a fixed date creates an unambiguous scheduling obligation (Compliance).","Technical content involves fuel‑tank wiring and P‑clip cushions — requires specialised maintenance access and technical skill (Background).","Dependence on external document: technical details and methods are contained in the Airbus Service Bulletin rather than in the AD text (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specific Airbus A320‑211/212/213 serial-numbered aeroplanes to inspect and, if necessary, repair P‑Clip cushions in the fuel tank per Airbus Service Bulletin A320‑28‑1052 Rev 1, within 3,500 flight cycles from 6 January 1994.  \n\nThe action addresses deteriorating, non‑fuel‑resistant cushions that could allow metal clips to abrade wiring and produce an arc in a lightning strike. Costs and scheduling fall to the aircraft owners/operators or their maintenance providers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-35-fuel-system-electrical-wiring","history":"/api/acts/ad-a320-35-fuel-system-electrical-wiring/history","analysis":"/api/acts/ad-a320-35-fuel-system-electrical-wiring/analysis","conflicts":"/api/acts/ad-a320-35-fuel-system-electrical-wiring/conflicts","importantCases":"/api/acts/ad-a320-35-fuel-system-electrical-wiring/important-cases","documents":"/api/acts/ad-a320-35-fuel-system-electrical-wiring/documents"}}