{"id":"F2006B07346","name":"AD/TB20/40 - Ammeter Electrical Circuit","slug":"ad-tb20-40-ammeter-electrical-circuit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49432,"registerId":"commonwealth-F2006B07346-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \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\nAerospatiale (Socata) TB20 (Trindad) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/TB20/40 Ammeter Electrical Circuit 12","sectionType":"part","heading":"AD/TB20/40 Ammeter Electrical Circuit 12/2001","content":"# AD/TB20/40 Ammeter Electrical Circuit 12/2001\n\nDM\n\nApplicability: All Model TB20 aeroplanes equipped with ammeter options OPT 10 593 00M, OPT 10 689 00M or OPT D689 00M.\n\nRequirement: Modify the ammeter electrical circuit in accordance with Socata Mandatory Service Bulletin TB Aircraft 10-122-24 dated July 2001.\n\nNote: DGAC AD 2001-446(A) refers.\n\nCompliance: At the next scheduled maintenance check, but no later than 31 December 2001.\n\nThis Airworthiness Directive becomes effective on 24 October 2001.\n\nBackground: The French Direction Générale de L’Aviation Civile has advised that in-flight failures of the ammeter electrical circuit have been reported to Socata. These failures could result in smoke or a burning smell in the cockpit. This Directive requires the modification of the ammeter electrical circuit.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 17 October 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 October 2001.","sortOrder":1}],"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 AD maintains its original narrow scope — addressing a specific electrical fault in specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined applicability criteria (specific ammeter option numbers)","Single, unambiguous requirement with clear reference to external technical document","Simple compliance deadline structure (next maintenance check OR hard deadline)","No nested exceptions, conditional logic, or cross-references to other legislation beyond the enabling regulation (CAR 1998 subreg 39.1(1)) and one related foreign AD","Straightforward background-to-requirement causal chain"],"plain_english_summary":"This AD mandates modification of the ammeter electrical circuit on specific Socata TB20 Trinidad aeroplanes (those fitted with OPT 10 593 00M, OPT 10 689 00M, or OPT D689 00M) after reported in‑flight failures that can cause smoke or burning smells in the cockpit. Owners/operators must comply by the next scheduled maintenance or by 31 December 2001. Issued by a CASA delegate under the Civil Aviation Regulations 1998."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope aligns with the stated safety purpose: correcting reported in‑flight ammeter circuit failures on TB20 aircraft with the listed ammeter options. No change from the document's expressed intent is evident in the text provided."},"complexity_factors":["Narrow, specific applicability (three identified ammeter option codes) reduces interpretive complexity","Action is prescriptive and references a single external document (Socata Mandatory Service Bulletin TB Aircraft 10-122-24), creating dependency on that document's technical detail","Fixed compliance timing (next scheduled maintenance but no later than a calendar date) simplifies scheduling but imposes a hard deadline","Operational implementation requires maintenance planning and possible parts/labour costs that are not specified in the AD","Cross-reference to DGAC AD noted but the AD does not reproduce technical instructions, requiring access to foreign AD/service bulletin"],"plain_english_summary":"Requires modification of the ammeter electrical circuit on specified Aerospatiale (Socata) TB20 aeroplanes in accordance with Socata Mandatory Service Bulletin TB Aircraft 10-122-24 (July 2001).\n\nApplies to all Model TB20 aircraft fitted with ammeter options OPT 10 593 00M, OPT 10 689 00M or OPT D689 00M because reported in‑flight ammeter failures could cause smoke or a burning smell. The modification must be done at the next scheduled maintenance check, and no later than 31 December 2001."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb20-40-ammeter-electrical-circuit","history":"/api/acts/ad-tb20-40-ammeter-electrical-circuit/history","analysis":"/api/acts/ad-tb20-40-ammeter-electrical-circuit/analysis","conflicts":"/api/acts/ad-tb20-40-ammeter-electrical-circuit/conflicts","importantCases":"/api/acts/ad-tb20-40-ammeter-electrical-circuit/important-cases","documents":"/api/acts/ad-tb20-40-ammeter-electrical-circuit/documents"}}