{"id":"F2006B08155","name":"AD/CESSNA 310/29 - Wing Leading Edge Fuel Lines and Wiring - Inspection and Modification","slug":"ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115322,"registerId":"commonwealth-F2006B08155-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 310/29 - Wing Leading Edge Fuel Lines and Wiring - Inspection and Modification","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)  Cessna 310 Series Aeroplanes\n\n \n\nAD/CESSNA 310/29 Wing Leading Edge Fuel Lines and\n\nWiring - Inspection and Modification\n\n\n6/73\n\n \n\nApplicability: All models 310C to 310Q with S/Nos. 35772 to 310Q0709 except those S/Nos. detailed in SL ME73-5, and all turbo 310 with S/Nos. 310P0001 to 310Q0709.\n\n \n\nRequirement: Action in accordance with Cessna SL ME73-5 and supplement 2. Compliance:  Within 100 hours time in service after 29 June 1973.\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 provided text sets a clear applicability range (models and serial numbers), specifies the required action by reference to Cessna Service Letter ME73-5 and Supplement 2, and sets a single compliance window (100 hours TIS after 29 June 1973). The document contains no indication that the scope here differs from the directive as issued; no modifications to applicability or requirements are present in the supplied text."},"complexity_factors":["Relies on an external technical document (Cessna Service Letter ME73-5 and Supplement 2) for operative procedures rather than containing technical steps in the AD itself (\"Requirement\").","Applicability is specified by model and serial-number ranges, with exclusions referenced to the Service Letter; operators must check serial-number lists in the Service Letter (\"Applicability\").","Compliance deadline is expressed in hours time in service rather than a calendar date, requiring operators to calculate remaining time in service (\"Compliance\").","Short, narrowly targeted directive (wing leading edge fuel lines and wiring) — limited technical scope reduces complexity.","No additional administrative regimes, alternative compliance pathways, or phased compliance in the text — single required action and single deadline simplifies implementation."],"plain_english_summary":"What this instrument does (mechanically)\n\n- It requires inspection and modification of the wing leading edge fuel lines and associated wiring on certain Cessna 310 series aeroplanes. (See heading and \"Requirement\".)\n- The required work must be carried out in accordance with Cessna Service Letter ME73-5 and Supplement 2. (\"Requirement\".)\n- The work must be completed within 100 hours time in service after 29 June 1973. (\"Compliance\".)\n\nWhich aircraft and who is affected\n\n- Affects Cessna 310 models 310C through 310Q with serial numbers 35772 to 310Q0709, except for any serial numbers specifically excluded in Service Letter ME73-5. It also affects all turbo 310 aeroplanes with serial numbers 310P0001 to 310Q0709. (\"Applicability\".)\n- The practical parties who must act are the registered owners/operators and their maintenance providers, because they are the ones who must arrange and pay for the inspection and any modification ordered by the Service Letter. (\"Applicability\"; \"Requirement\".)\n\nWhy this matters (stated purpose and practical implications)\n\n- The text itself does not include a descriptive statement of the underlying hazard. It mandates inspection and modification of fuel lines and wiring in the wing leading edge, which indicates the directive’s operational effect is to require corrective work on those components. (heading; \"Requirement\".)\n\nPractical consequences, incentives and trade-offs\n\n- Who pays: owners/operators and their maintenance organisations will bear direct costs for the inspection and any required modification (parts, labour) and for aircraft downtime while the work is done. (\"Requirement\"; \"Compliance\".)\n- Who decides how to comply: the AD delegates the technical steps to Cessna’s Service Letter ME73-5 and Supplement 2. That means compliance follows the manufacturer-prescribed procedure rather than being detailed in the AD text itself. (\"Requirement\".)\n- Compliance burden: affected operators must (a) determine whether their aircraft serial number falls within the listed ranges or is excluded by the Service Letter, and (b) schedule and complete the inspection/modification within the 100 hours TIS deadline. This creates administrative effort (record checks, scheduling) and operational downtime. (\"Applicability\"; \"Compliance\".)\n- Trade-offs and opportunity cost: time and money spent on the required work are resources not available for other uses (operations, alternative maintenance). Some operators may need to rearrange flight schedules or accept reduced availability while work is done. (\"Requirement\"; \"Compliance\".)\n- Implementation risk and compliance verification: because the AD points to an external Service Letter for procedure and for excluded serial numbers, operators must obtain and follow that document; regulators verify compliance against the AD and the specified Service Letter. The AD text itself does not set technical tolerances or inspection detail, so the Service Letter is the operative technical standard. (\"Requirement\".)\n\nConcrete behaviour changes required\n\n- Affected aircraft must be inspected and, if required by the Service Letter, modified for the wing leading edge fuel lines and wiring. (\"Requirement\".)\n- This must be completed within 100 hours time in service after 29 June 1973. (\"Compliance\".)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific airworthiness concern (fuel line and wiring integrity) in a defined aircraft population. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 3 defined elements: applicability range, requirement reference, and compliance deadline","No nested conditional logic — simple 'all models X except Y' structure","Single cross-reference to external document (Cessna SL ME73-5)","No internal definitions section or interpretation clauses","Straightforward compliance mechanism (hours in service, not calendar time)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Cessna 310 series aeroplanes** to inspect and modify the **fuel lines and electrical wiring** located in the wing leading edge (the front part of the wing).\n\n**Who it affects:**\n- All Cessna 310C through 310Q models with serial numbers 35772 to 310Q0709\n- **Except** those serial numbers listed in a specific Cessna service letter (SL ME73-5)\n- All turbocharged 310 models with serial numbers 310P0001 to 310Q0709\n\n**What must be done:**\n- Follow the instructions in **Cessna Service Letter ME73-5 and its Supplement 2**\n- Complete the work **within 100 hours of flying time** after 29 June 1973\n\n**Why it matters:**\nFuel lines and wiring in the wing leading edge are critical safety components. If fuel leaks or electrical faults occur in this area, it could lead to fire or engine failure. This directive ensures potentially dangerous defects are found and fixed before they cause accidents.\n\n**Key point:** This is a **retrospective safety mandate** — it applies to aircraft already in service, not just new ones. Non-compliance means the aircraft cannot legally fly in Australian airspace."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification","history":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-310-29-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/documents"}}