{"id":"F2009L01563","name":"AD/CHA/2 Amdt 3 - Circuit Protector","slug":"ad-cha-2-amdt-3-circuit-protector","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78281,"registerId":"commonwealth-F2009L01563-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"American Champion (Aeronca, Bellanca) Se","sectionType":"division","heading":"American Champion (Aeronca, Bellanca) Series Aeroplanes","content":"### American Champion (Aeronca, Bellanca) Series Aeroplanes\n\n| AD/CHA/2 Amdt 3 | Circuit Protector | 5/2009 |\n| --------------- | ----------------- | ------ |\n\n| Applicability: | All Champion 7 and 8 series aircraft fitted with alternator system.                                                                                                                                                                                                                                                            |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Install a circuit protective device (ie fuse or circuit breaker) between the alternator power cable and the ammeter connection.Note: Advisory circular AC21-99, Aircraft Wiring and Bonding, provides information on a suitable circuit breaker device.                                                                        |\n| Compliance:    | Unless previously accomplished, within the next 100 hours time in service. Compliance with a previous issue of this Directive constitutes compliance with the requirements of this Directive.                                                                                                                                  |\n|                | This Amendment becomes effective on 7 May 2009.                                                                                                                                                                                                                                                                                |\n| Background:    | This AD was initially issued to provide protection against a fire hazard as no circuit protection existed in the alternator line which routed through bulkheads into the engine. This amendment is issued to update the note by including the correct source of advisory information as AC 21-99, Aircraft Wiring and Bonding. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2009","sortOrder":0},{"sectionNumber":"AD/CHA/2 Amdt 3","sectionType":"part","heading":"AD/CHA/2 Amdt 3","content":"## AD/CHA/2 Amdt 3","sortOrder":1},{"sectionNumber":"Circuit Protector","sectionType":"part","heading":"Circuit Protector","content":"## Circuit Protector","sortOrder":2},{"sectionNumber":"5/2009","sectionType":"part","heading":"5/2009","content":"## 5/2009","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment makes no substantive change to the scope. It is purely administrative — correcting a reference to an advisory circular (changing from an unspecified or incorrect reference to AC 21-99). The safety requirement, affected aircraft, and compliance deadline remain identical to previous versions."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (aircraft series and alternator system)","Single operational requirement with one straightforward action","No cross-references to other legislation or regulations","Simple compliance condition (time-based deadline with grandfathering for prior compliance)","Minimal conditional logic (only 'unless previously accomplished')"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain American Champion 7 and 8 series aeroplanes with alternators to fit a fuse or circuit breaker on the alternator-to-ammeter power cable to eliminate a fire risk from an unprotected cable running into the engine area. Amendment 3 only updates the referenced technical guidance (AC 21-99). Compliance is required within 100 flight hours unless already done under an earlier AD."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment does not change the directive's operational scope or the installation requirement. It only updates the advisory reference to AC 21-99 (Aircraft Wiring and Bonding). The protective-installation mandate, applicability to Champion 7 and 8 series with alternators, the 100‑hour compliance window, and recognition of prior compliance remain unchanged (Requirement; Applicability; Compliance; Background)."},"complexity_factors":["Narrow technical scope — applies only to Champion 7 and 8 series aircraft fitted with an alternator (Applicability).","Single, clear technical action — install a circuit protective device between alternator power cable and ammeter connection (Requirement).","Choice of acceptable devices — either a fuse or a circuit breaker is permitted, which requires a decision on type and rating (Requirement).","Short compliance window — 100 hours time in service creates scheduling and maintenance planning needs (Compliance).","Reference to external guidance — note directs users to AC 21-99 for suitable devices; reliance on that external document introduces interpretation/selection work (Requirement / Background).","Previous compliance recognised — compliance with an earlier issue of the directive satisfies this amendment, which reduces scope for rework (Compliance).","Implementation logistics — physical installation may need a qualified maintainer and parts, creating a modest cost and verification burden (implied by Requirement and Compliance)."],"plain_english_summary":"Requires owners/operators of Champion 7 and 8 series aeroplanes fitted with an alternator to fit a circuit protective device (a fuse or circuit breaker) in the alternator power lead between the alternator and the ammeter, to be completed within 100 hours time-in-service unless already done.  The amendment only updates the advisory reference to AC 21-99 (Aircraft Wiring and Bonding) while keeping the protective-installation requirement the same."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cha-2-amdt-3-circuit-protector","history":"/api/acts/ad-cha-2-amdt-3-circuit-protector/history","analysis":"/api/acts/ad-cha-2-amdt-3-circuit-protector/analysis","conflicts":"/api/acts/ad-cha-2-amdt-3-circuit-protector/conflicts","importantCases":"/api/acts/ad-cha-2-amdt-3-circuit-protector/important-cases","documents":"/api/acts/ad-cha-2-amdt-3-circuit-protector/documents"}}