{"id":"F2006B04840","name":"AD/CA25/9 - Alternator Circuit Breaker Switch","slug":"ad-ca25-9-alternator-circuit-breaker-switch","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44641,"registerId":"commonwealth-F2006B04840-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CA25/9 - Alternator Circuit Breaker Switch","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)  \nSkyfox Aviation (Hedaro) CA25 Series Aeroplanes\n\nAD/CA25/9 Alternator Circuit Breaker Switch 12/98 TX\n\nApplicability: All CA25 aeroplanes prior to Serial Number (S/N) CA25068 and CA25N aeroplanes prior to S/N CA25N075 with alternator switch Part Number W31X2A1G-30 fitted.\n\nNote: The switch may have been fitted either during construction or in accordance with Skyfox Aviation Service Bulletin (SB) No 11 dated 29 January 1996.\n\nRequirement: 1. If not previously accomplished, inspect the aircraft for correct installation of the 30 Amp alternator circuit breaker switch in accordance with Skyfox Aviation SB No 19 dated 28 October 1997.\n\n2. If, as a result of the Requirement 1 inspection, the alternator circuit breaker switch is found to be incorrectly installed, rework the installation in accordance with SB No 19.\n\nCompliance: 1. Within 10 hours time in service or 30 days after the effective date of this directive, which ever occurs first.\n\n2. Prior to further flight after the Requirement 1 inspection.\n\nThis Airworthiness Directive becomes effective on 18 September 1998.\n\nBackground: Skyfox Aviation has advised that, in some cases, the alternator circuit breaker switch may be incorrectly installed. If this is the case the switch will operate correctly but the circuit breaker would fail to trip during excessive current flow. This could allow the aircraft wiring to overheat, resulting in smoke in the cockpit and a possible in- flight fire.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive enforces inspection and corrective rework only for specific CA25/CA25N serial ranges when alternator switch P/N W31X2A1G-30 is fitted, referencing Skyfox SB No.19. It does not broaden applicability beyond those aircraft/parts or add ongoing monitoring obligations; its effect is to require a one‑time inspection and corrective action where necessary."},"complexity_factors":["Narrow and explicit applicability by aircraft model, serial-number cutoffs, and specific part number (limits affected population).","Clear, short compliance timeline (10 flight hours or 30 days) which creates operational scheduling pressure.","Mandatory reliance on an external technical document (Skyfox SB No.19) for inspection and rework details.","Safety-critical electrical inspection and rework require qualified personnel and access to parts/tools.","Immediate grounding risk if incorrect installation is found (rework required prior to further flight), affecting operators' availability and costs.","Simple pass/fail outcome (inspect → if incorrect then rework) reduces legal ambiguity but creates administrative tracking for compliance."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Skyfox CA25 (before S/N CA25068) and CA25N (before S/N CA25N075) aeroplanes fitted with alternator switch P/N W31X2A1G-30 to inspect the 30 A alternator circuit breaker switch and, if installed incorrectly, rework it per Skyfox Service Bulletin No.19. CASA sets a compliance window of 10 flight hours or 30 days and requires rework before further flight. It matters because a misinstalled breaker may not trip, allowing wiring to overheat and risking smoke or an in‑flight fire; operators pay for inspection and repair and may be grounded until fixed."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific safety defect in a particular aircraft component. It has not expanded beyond its original purpose of ensuring correct installation of the alternator circuit breaker switch in affected Skyfox aircraft."},"complexity_factors":["Single, specific technical requirement (inspect one component)","Limited applicability (two aircraft models, specific serial number ranges, specific part number)","Clear two-step compliance structure (inspect, then repair if needed)","Simple conditional logic (if found incorrect, then rework)","No cross-references to external legislation beyond the referenced Service Bulletin","Short document (under 300 words)"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific **Skyfox Aviation CA25 series aeroplanes**.\n\n**What it does:**\n- Requires owners/operators to **inspect** whether the alternator circuit breaker switch is installed correctly\n- If found incorrectly installed, **fix it immediately** before flying again\n\n**Who it affects:**\n- All CA25 aeroplanes with serial numbers **before CA25068**\n- All CA25N aeroplanes with serial numbers **before CA25N075**\n- Only those fitted with a specific switch part number (W31X2A1G-30)\n\n**Why it matters:**\nAn incorrectly installed switch might **look like it's working** but the circuit breaker won't actually trip during electrical overloads. This could cause:\n- Aircraft wiring to overheat\n- Smoke in the cockpit\n- **Potential in-flight fire**\n\n**Deadlines:**\n- **Inspection:** Within 10 flight hours or 30 days (whichever comes first)\n- **Repair:** Immediately — before the next flight if problems are found"},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch","history":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch/history","analysis":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch/analysis","conflicts":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch/conflicts","importantCases":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch/important-cases","documents":"/api/acts/ad-ca25-9-alternator-circuit-breaker-switch/documents"}}