{"id":"F2006B05019","name":"AD/CESSNA 177/25 - Cigar Lighter Wiring","slug":"ad-cessna-177-25-cigar-lighter-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44929,"registerId":"commonwealth-F2006B05019-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 177/25 - Cigar Lighter 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)  \nCessna 177 Series Aeroplanes\n\nAD/CESSNA 177/25 Cigar Lighter Wiring 6/79\n\nApplicability: Models 177 and 177RG with S/Nos. 1770001 to 17702314 and 177RG0001 to 177RG0788.\n\nRequirement: Disconnect the wire, at the ammeter or at the electrical system bus as applicable, that connects the bus to the cigar lighter receptacle. (The wire is connected to either the bus side or equipment side of a circuit breaker or to the ammeter). Following the disconnection of this wire either:\n\n    Reconnect the wire to the electrical bus by using an existing or newly installed circuit protection device that is properly rated to protect the wire gauge used for this circuit; or\n\n    2. Disconnect the wire from the lighter receptacle at the opposite end and remove it from the airplane; or\n\n    3. Protect the wire by insulating its disconnected end, fold this wire end back against the wire bundle in which it is routed and secure it to that bundle.\n\nNote 1: For those installations reconnected in accordance with paragraph 1 the proper rated circuit protection device to be used may be determined by consulting ANO 108.32 Appendix Table 6.\n\nNote 2: An inline fuse is an acceptable means of compliance. Note 3: FAA AD 79-08-03 Refers.\n\nCompliance: Within 100 hours time in service after 30 June 1979.\n\nBackground: Incidents of wiring shorting and fires in the wiring bundles have occurred overseas.\n\nCircuit protection is required to prevent further incidents.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original corrective scope: mitigate short-circuit/fire risk from cigar-lighter wiring in the specified Cessna 177/177RG serial-number range by requiring disconnection, removal, or protected reconnection within the stated compliance window. No expansion or narrowing beyond the published applicability and prescribed remedies is indicated in the text provided."},"complexity_factors":["Multiple compliance options (disconnect at ammeter/bus and then either reinstall with protection, remove, or insulate and stow) — Requirement","Need to identify exact wire routing and connection point (ammeter, bus side or equipment side of a circuit breaker) — Requirement","Selection and sizing of circuit protection requires consulting ANO 108.32 Appendix Table 6 or using an inline fuse — Note 1 and Note 2","Applicability limited to specific models and serial-number ranges, requiring record checks — Applicability","Fixed compliance deadline expressed in hours time-in-service after a calendar date (administrative tracking) — Compliance","Safety rationale based on overseas incidents of shorts/fires (background) affecting justified urgency but not prescribing method beyond options — Background"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Cessna 177 and 177RG aircraft (listed serial numbers) to disconnect, remove, or protect the cigar-lighter wiring — or reconnect it to the electrical bus with properly rated circuit protection — to reduce the risk of wiring shorts and fires. The Civil Aviation Safety Authority issues the requirement; aircraft owners/operators must carry out and pay for the work within 100 hours time-in-service after 30 June 1979, using the compliance options and fuse ratings referenced in the AD."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific wiring defect in specific aircraft. It has not expanded beyond its original purpose of preventing cigar lighter wiring fires."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined terms implicitly used (time in service, circuit protection device)","Simple three-option compliance structure with clear 'or' alternatives","Single applicability criterion based on aircraft model and serial number","No cross-references to other legislation except a non-binding reference to FAA AD 79-08-03 and an advisory note (ANO 108.32)","No nested exceptions or conditional logic","Straightforward compliance deadline (100 hours after fixed date)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specified Cessna 177 and 177RG aircraft (serials 1770001–17702314; 177RG0001–177RG0788) to eliminate a fire hazard from unprotected cigar-lighter wiring. Affected aircraft must either add correct-size circuit protection, remove the lighter and wiring, or disconnect and secure the wire. The AD responds to overseas in-flight electrical shorts and fires and required compliance within 100 flight hours after 30 June 1979."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring","history":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring/history","analysis":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring/analysis","conflicts":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring/conflicts","importantCases":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring/important-cases","documents":"/api/acts/ad-cessna-177-25-cigar-lighter-wiring/documents"}}