{"id":"F2006B05885","name":"AD/PA-34/14 - Fuel Line Chafing - Inspection","slug":"ad-pa-34-14-fuel-line-chafing-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135933,"registerId":"commonwealth-F2006B05885-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/14 - Fuel Line Chafing - Inspection","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)  Piper PA-34 (Seneca) Series Aeroplanes\n\n \n\nAD/PA-34/14 Fuel Line Chafing - Inspection 10/74\n\nApplicability: Model PA-34-200 with S/Nos. 34-7250001 to 34-7450209. Document:  Piper SB No. 429.\n\nCompliance: Within 100 hours time in service after 31 October 1974.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \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 directive, as presented, requires inspection of fuel lines on Model PA-34-200 aeroplanes within the listed serial-number range and within 100 hours time-in-service after 31 October 1974, following Piper SB No. 429. There is no text in the supplied instrument indicating the scope has been expanded or narrowed from an earlier version; the AD’s scope appears confined to the stated model/serial-number range and the one-time inspection deadline."},"complexity_factors":["Narrow applicability limited to a single model and a specific serial-number range (reduces scope complexity).","Mandated action is a single inspection with a single deadline (simple compliance requirement).","Dependence on an external document (Piper SB No. 429) for procedural detail increases practical complexity because operators must obtain and follow that bulletin.","Fixed compliance timing (100 hours TIS after a set date) creates scheduling complexity for operators managing flight hours.","No procedural detail in the AD text itself — the AD is terse and delegates technical method and corrective actions to the referenced service bulletin."],"plain_english_summary":"What this instrument does mechanically\n\n- Requires an inspection for fuel line chafing on a specific set of Piper PA-34-200 aeroplanes. (AD title: \"AD/PA-34/14 Fuel Line Chafing - Inspection 10/74\"; Applicability: \"Model PA-34-200 with S/Nos. 34-7250001 to 34-7450209\".)\n- Directs operators to follow the procedures or instructions referenced in Piper Service Bulletin No. 429 (Document: \"Piper SB No. 429\").\n- Fixes the compliance deadline: the inspection must be done within 100 hours time in service after 31 October 1974. (Compliance: \"Within 100 hours time in service after 31 October 1974.\")\n\nWho is affected\n\n- Owners and operators of Piper PA-34-200 aeroplanes with serial numbers 34-7250001 through 34-7450209. (Applicability.)\n- Maintenance organisations and technicians who perform the required inspections and any follow-up work per the referenced service bulletin. (Document reference.)\n\nWhy it matters (stated purpose and practical implications)\n\n- The directive is presented as addressing fuel line chafing (the title states the subject). That framing indicates the intended safety concern is wear of fuel lines that could lead to leaks or failure; the AD requires an inspection to identify any such condition. (AD title.)\n\nCosts, incentives and trade-offs (mechanics, not judgement)\n\n- Who pays: the aircraft owner/operator must pay for the inspection and for any repairs or replacements identified by the inspection. (Applicability; Document reference.)\n- Who decides: the Civil Aviation Safety Authority issued the directive and set the compliance requirement; the detailed inspection method and corrective actions are supplied or recommended by the referenced Piper Service Bulletin No. 429. (AD issuance; Document reference.)\n- Compliance burden: aircraft must be inspected within the specified 100 hours time-in-service window after 31 October 1974; that creates a hard scheduling deadline for operators and may require taking an aircraft out of service for the inspection. (Compliance.)\n- Implementation risk and reliance: the AD refers to an external document (Piper SB No. 429) for the inspection procedure; operators must obtain and follow that bulletin, so the practical effect depends on the bulletin’s content and availability. (Document.)\n- Effects on private enterprise and competition: independent maintenance providers can perform the inspection and any repair work, creating demand for MRO services among the affected fleet. The AD itself does not specify that work must be done by any particular provider. (Applicability; Document.)\n- Opportunity costs and substitution effects: time and money spent on inspection and repair are resources not available for other uses (aircraft operations, upgrades, etc.). Operators may prioritise which aircraft to inspect first within the affected serial-number range to meet the 100-hour deadline. (Compliance; Applicability.)\n\nDiscretion and enforcement\n\n- The AD sets who is covered and sets a time limit; it does not leave the decision whether to require inspection to each owner. The AD points operators to the service bulletin for procedure, which channels technical discretion to the manufacturer’s instructions. (Applicability; Compliance; Document.)\n\nNet practical picture\n\n- Mechanically, this AD creates a mandatory inspection requirement for a narrowly defined set of aircraft, to be performed within a fixed number of hours following the specified date and in accordance with the referenced Pfefer/Piper service bulletin. The direct recipients of cost and operational disruption are the aircraft owners/operators and the maintenance providers who will perform the work. (Applicability; Compliance; Document.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1974 with a single, specific purpose. It has not expanded beyond its original scope of requiring a one-time fuel line inspection for a defined aircraft population."},"complexity_factors":["Extremely short document (under 150 words)","Only 4 defined elements: specific aircraft model, serial number range, reference document, and compliance deadline","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Single, unambiguous compliance action with clear deadline","No conditional logic, exceptions, or nested provisions","Straightforward applicability test (serial number check)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Piper PA-34 Seneca aircraft to inspect their fuel lines for \"chafing\" (wear caused by rubbing against other parts). Worn fuel lines can leak fuel, creating fire or explosion risks.\n\n**Who it affects:** \n- **Aircraft:** Piper PA-34-200 model planes with serial numbers from 34-7250001 to 34-7450209\n- **People:** Owners, operators, and maintenance engineers responsible for these aircraft\n\n**What must be done:**\n- Inspect the fuel lines following Piper Service Bulletin No. 429 (the manufacturer's official repair notice)\n- Complete this inspection within 100 hours of flying time after 31 October 1974\n\n**Why it matters:** Fuel line chafing is a serious safety hazard. This directive prevents potential fuel leaks that could cause in-flight fires or engine failures. Compliance is **legally mandatory** — flying without completing this inspection violates civil aviation law."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection","history":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection/history","analysis":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection/analysis","conflicts":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection/conflicts","importantCases":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection/important-cases","documents":"/api/acts/ad-pa-34-14-fuel-line-chafing-inspection/documents"}}