{"id":"F2006B08192","name":"AD/CESSNA 320/14 - Engine Nacelle Wiring - Inspection","slug":"ad-cessna-320-14-engine-nacelle-wiring-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115401,"registerId":"commonwealth-F2006B08192-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/14 - Engine Nacelle Wiring - Inspection","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)  \nCessna 320 Series Aeroplanes\n\nAD/CESSNA 320/14 Engine Nacelle Wiring \\- Inspection 6/71\n\nApplicability: All models with S/Nos. 320-0001 to 320F-0045.\n\nRequirement: 1. (a) Visually inspect the insulating material of the electrical wiring grommet and clamps located in the engine nacelles between the canted bulkhead and the firewall for charred, burnt or heat hardened condition.\n\n(b) Visually inspect the heat shields located in the engine nacelles between the canted bulkhead and the firewall for deterioration or incorrect installation and attachment that could contribute to excessive heat in this area.\n\n    2. If any of the conditions described in para. 1 are found during the required inspections, replace any defective parts with serviceable items.\n\n    3. Modify the engine nacelles in accordance with Cessna SL ME71-6.\n\nCompliance: For Paras. 1 and 2 \\- Within 100 hours time in service after 30 July 1971 and thereafter at intervals not exceeding 100 hours time in service until modified in accordance with Para. 3.\n\nFor Para. 3 \\- Before 1 February 1972.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1971 addressing a specific technical defect in specific aircraft. It has not expanded beyond its original purpose of ensuring wiring and heat shield integrity in Cessna 320 engine nacelles."},"complexity_factors":["Single, specific aircraft type and narrow serial number range","Only 3 main requirements with clear sequential logic (inspect → replace if needed → modify)","No defined terms section or complex cross-references to other legislation","Simple temporal compliance structure (hours in service + calendar date)","Straightforward conditional logic (if found → then replace)","References only one external technical document (Cessna Service Letter ME71-6)"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators and maintenance organisations of Cessna 320 series aircraft (serials 320-0001 through 320F-0045) inspect engine nacelle wiring and heat shields for heat damage, replace defective parts, and install a permanent nacelle modification per Cessna Service Letter ME71-6. Inspections repeat every 100 flight hours until the modification is completed, which must be done by 1 February 1972, to prevent electrical failures or engine fires."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive defines a fixed scope (Cessna 320 S/N 320-0001 to 320F-0045) and prescribes inspections, corrective replacement, and a mandated modification; the text contains no indication that the scope has been changed from the Directive as written."},"complexity_factors":["Serial-number-limited applicability narrows who must comply (Applicability).","Two-tier requirement: repeated inspections until a one-time mandated modification is implemented (Requirement Paras. 1–3; Compliance).","Prescriptive inspection criteria use partly subjective terms (e.g. 'deterioration', 'incorrect installation') requiring technician judgment (Requirement Para. 1).","Dependence on an external manufacturer document for the modification (Cessna SL ME71-6) introduces document-reference complexity (Requirement Para. 3).","Clear, short compliance interval (100 hours TIS) and a calendar deadline for modification reduce procedural ambiguity (Compliance)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 320 series aircraft (S/N 320‑0001 to 320F‑0045) to inspect engine-nacelle wiring grommet/clamp insulation and heat shields for burning, charring or incorrect installation, to replace any defective parts, and to modify the nacelles per Cessna SL ME71‑6. Inspections must recur every 100 hours until the mandatory modification is completed; the modification has a fixed compliance date. The operator/owner bears the inspection, repair and modification costs (Paras. 1–3; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection","history":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection/history","analysis":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection/analysis","conflicts":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection/conflicts","importantCases":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection/important-cases","documents":"/api/acts/ad-cessna-320-14-engine-nacelle-wiring-inspection/documents"}}