{"id":"F2006B04945","name":"AD/CESSNA 150/47 - Cigar Lighter Wiring","slug":"ad-cessna-150-47-cigar-lighter-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44803,"registerId":"commonwealth-F2006B04945-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nCessna 150, F150, 152 & F152 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CESSNA 150/47 Cigar Lighter Wiring 3/","sectionType":"part","heading":"AD/CESSNA 150/47 Cigar Lighter Wiring 3/2003","content":"# AD/CESSNA 150/47 Cigar Lighter Wiring 3/2003\n\nApplicability: Model 150 series aeroplanes with serial numbers (S/N) 15065062 through 15075564 and Model A150 series aeroplanes with S/N A15000001 through A15000480.\n\nRequirement: If not previously accomplished; 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    b. Disconnect the wire from the lighter receptacle at the opposite end and remove it from the aeroplane, or\n\n    c. 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: The requirements of this Directive may have been previously accomplished in accordance with FAA AD 79-08-03 Amdt 39-3428.\n\nNote 2: For those installations reconnected in accordance with paragraph a. above, the proper rated circuit protection device to be used may be determined by consulting FAA Advisory Circular 43.13-1B Chapter 11.\n\nNote 3: FAA AD 79-08-03 Amdt 39-3428 refers.\n\nCompliance: At the next annual inspection, but no later that 100 hours time in service or 12 months after the effective date of this Directive, which ever occurs first.\n\nThis Airworthiness Directive becomes effective on 20 March 2003.","sortOrder":1}],"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":2,"scope_assessment":{"changed":false,"description":"This AD remains narrowly focused on the cigar-lighter circuit in the specified Cessna 150/A150 serial-number ranges. It aligns with and references the earlier FAA AD and provides three equivalent corrective options; it does not expand the technical scope beyond correcting the unprotected or improperly protected cigar-lighter wiring. There is no indication in this text that the directive has grown beyond that original safety purpose."},"complexity_factors":["Short, single-purpose directive focused on one wiring circuit (cigar lighter)","Clear applicability limited to two tight serial-number ranges","Three discrete, easily understood compliance options (reconnect with proper protection; remove at lighter end; or insulate and stow)","Single compliance window (next annual or 100 hours or 12 months) — no rolling or staged requirements","Cross-references to FAA AD 79-08-03 and FAA Advisory Circular 43.13-1B for prior compliance and guidance on sizing protection devices"],"plain_english_summary":"**What this directive does (mechanical change)\n\n- Requires owners/operators of certain Cessna 150/A150 aeroplanes (specific serial number ranges listed below) to disable or properly protect the cigar-lighter power lead. The action may be either: reconnect the lead with correctly rated circuit protection; remove the lead at the lighter end and pull it out; or insulate and stow the disconnected end against the wire bundle so it is secured (Requirement).\n\n**Who this affects**\n\n- Owners and operators of Cessna 150 series aeroplanes with S/N 15065062 through 15075564 and Model A150 with S/N A15000001 through A15000480 (Applicability).\n- Licensed maintenance organisations, certificated aircraft maintenance engineers and AMOs who perform the work and sign it off.\n\n**When it must be done**\n\n- At the next annual inspection for the aircraft, or no later than 100 hours time-in-service or 12 months after the AD’s effective date, whichever comes first (Compliance).\n\n**Why it’s required (stated purpose and an operational check)**\n\n- The AD’s stated reason (in the background to the directive and by cross-reference to FAA AD 79-08-03) is to correct an unsafe condition arising from cigar-lighter wiring—typically a risk of electrical overload or fire if the lighter circuit lacks appropriate protection.\n\nTest of that purpose against mechanics, costs and incentives\n\n- Mechanism: the directive removes or properly protects the unprotected/incorrectly protected power lead to eliminate an unprotected fuseless path to the aircraft electrical bus. This directly addresses the failure mode (energised, unprotected wiring in the cabin) by either adding correct circuit protection or physically removing/isolating the conductor (Requirement).\n- Cost and burden: the work is short and routine electrical maintenance (disconnecting, insulating, removing a wire or installing a correct-rated breaker/fuse). Costs are mainly modest labour and, if chosen, the cost of a rated circuit protection device and installation. These are one-off compliance costs payable by the aircraft owner/operator.\n- Incentives and private choices: owners have three compliance options, preserving some choice (restore function with correct protection, remove the convenience item, or stow the conductor). Restoring the lighter function requires purchasing/installing an appropriately rated circuit protector, which may be chosen or deferred by the owner.\n- Effects on maintenance market: the AD creates predictable demand for straightforward electrical work, benefiting independent AMEs and maintenance organisations that perform annual inspections. There is no apparent barrier for independent shops to perform the work; instructions are concise and reference FAA Advisory Circular 43.13-1B for selecting the protective device (Note 2).\n- Implementation risk and compliance traps: reconnection without choosing the correct-rated protection device would undermine the safety objective. The AD mitigates that by requiring the device be “properly rated” for the wire gauge and by pointing to the FAA AC for sizing guidance (Note 2). Inspectors and maintainers must ensure the correct part is fitted and documented.\n- Concentrated benefits / diffuse costs: benefits (reduced electrical/fire risk) accrue directly to individual aircraft and their occupants (concentrated); costs (modest maintenance expense and possible loss of cigar-lighter convenience) are diffuse across affected owners.\n- Substitution effects: owners who remove the fixed lighter may use portable or battery-powered devices instead; that may shift rather than eliminate risk if such substitutes are used improperly, but the AD only governs the aircraft-installed wiring.\n\n**Cross-references and prior compliance**\n\n- The AD acknowledges earlier compliance paths under FAA AD 79-08-03 (Note 1) and cites FAA AD 79-08-03 Amdt 39-3428 (Note 3). It also directs maintainers to FAA Advisory Circular 43.13-1B Chapter 11 for guidance on choosing a rated protection device (Note 2).\n\n**Who decides and how compliance is demonstrated**\n\n- The aircraft owner/operator decides which of the three permitted corrective actions to take. Compliance is demonstrated by maintenance records and the annual inspection sign-off showing the chosen action was completed within the specified compliance window.\n\n**Net practical effect**\n\n- Removes or properly protects an at-risk electrical conductor on specified older Cessna 150/A150 aircraft to reduce the risk of electrical faults or fire. The requirement is short, prescriptive in options, and is intended to be accomplished during routine maintenance with modest cost and limited technical difficulty (Requirement, Compliance, Notes)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific unsafe condition (unprotected cigar lighter wiring) in specific aircraft models with specific serial numbers. There is no evidence of scope creep; the directive remains tightly focused on the original safety issue identified in FAA AD 79-08-03."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined applicability criteria (specific serial number ranges)","Simple conditional structure: one requirement with three mutually exclusive options (a, b, or c)","No cross-references to other legislation beyond optional guidance documents (FAA Advisory Circular)","Single compliance deadline with clear hierarchy (next annual inspection vs. 100 hours/12 months)","No nested exceptions or sub-delegations"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of specified Cessna 150/A150 serial-number ranges to eliminate a fire risk from an unprotected cigar-lighter circuit by disconnecting the wire and either fitting a correctly rated fuse/circuit breaker, removing the wire, or insulating and securing its end. Compliance is required by the next annual inspection, or within 100 flight hours, or within 12 months after 20 March 2003—whichever occurs first."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring","history":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring/history","analysis":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring/analysis","conflicts":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring/conflicts","importantCases":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring/important-cases","documents":"/api/acts/ad-cessna-150-47-cigar-lighter-wiring/documents"}}