{"id":"F2006L02232","name":"AD/BAe 146/124 - Three-Phase Circuit Breakers","slug":"ad-bae-146-124-three-phase-circuit-breakers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117558,"registerId":"commonwealth-F2006L02232-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 146 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 146 Series Aeroplanes","content":"### British Aerospace BAe 146 Series Aeroplanes\n\n| AD/BAe 146/124 | Three-Phase Circuit Breakers | 8/2006 |\n| -------------- | ---------------------------- | ------ |\n\n| Applicability: | All BAe 146 series aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. If not previously accomplished, inspect and test all three-phase circuit breakers, terminal leads, wire looming and circuit breaker panels in accordance with Paragraph 2.C. of BAe Systems (Operations) Ltd Inspection Service Bulletin24-141 Revision 0 dated 15 August 2005 or later revision approved by the European Aviation Safety Agency (EASA).                                                                                |\n|                | 2. Rectify any damage found and replace unserviceable units detected during the Requirement 1 inspection and test.                                                                                                                                                                                                                                                                                                                         |\n|                | Inspections and tests completed in accordance with National Jet Systems Technical Service Instruction Number TSI-146-24-007 Issue 1 dated 9 December 2003 are considered acceptable for inspections and tests required by this Directive.                                                                                                                                                                                                  |\n|                | Note: EASA AD 2006-0132 refers.                                                                                                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | For Requirement 1 - Within 12 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                           |\n|                | For Requirement 2 - Before further flight after the Requirement 1 inspection and test.                                                                                                                                                                                                                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 3 August 2006.                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | Investigation into the cause of overheating of three-phase circuit breakers, used at various locations throughout the aircraft (but predominantly in the under floor electrical bay and the flight deck), has identified a possible age related deterioration of the units. Failure of a circuit breaker will result in the generation of smoke or flames, and prevent the electrical load from being isolated from its electrical supply. |\n\n|     | This Directive requires the inspection of all three-phase circuit breakers and wiring for cracking, discoloration, corrosion, security or burning and, if necessary, the rectification of any damage found together with the replacement of any defective circuit breakers. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n21 June 2006","sortOrder":0},{"sectionNumber":"AD/BAe 146/124","sectionType":"part","heading":"AD/BAe 146/124","content":"## AD/BAe 146/124","sortOrder":1},{"sectionNumber":"Three-Phase Circuit Breakers","sectionType":"part","heading":"Three-Phase Circuit Breakers","content":"## Three-Phase Circuit Breakers","sortOrder":2},{"sectionNumber":"8/2006","sectionType":"part","heading":"8/2006","content":"## 8/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific identified defect (age-related circuit breaker deterioration). The scope remains precisely limited to inspection and replacement of three-phase circuit breakers on one aircraft type, consistent with standard AD practice."},"complexity_factors":["Single, clearly defined applicability (all BAe 146 series aircraft)","Only two substantive requirements with straightforward sequential logic","Single cross-reference to an EASA directive and one alternative compliance pathway","No defined terms section — uses plain technical language","Simple two-part compliance deadline structure","Background explanation provided in plain language"],"plain_english_summary":"This AD requires Australian operators of British Aerospace BAe 146 series aircraft to inspect and test all three‑phase circuit breakers, repair any damage, and replace faulty units. It responds to age-related deterioration that can cause overheating, smoke, fire, or loss of fault isolation.\n\nInspections must be completed within 12 months of 3 August 2006 and any repairs/replacements done before the aircraft next flies. Prior inspections performed under National Jet Systems TSI‑146‑24‑007 (2003) are accepted as compliance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Applicability is explicit: all BAe 146 series aeroplanes. The Directive accepts a prior National Jet Systems inspection as meeting the requirement but does not broaden or narrow the set of affected aircraft (Applicability; Requirement paragraph)."},"complexity_factors":["Single, narrowly focused technical task (inspect/test; rectify/replace) — Requirement 1 & 2","Refers to external technical material that must be followed or approved (BAe Systems Inspection Service Bulletin 24-141; EASA approval) — Requirement 1","Allows a specific prior inspection standard as acceptable (National Jet Systems TSI-146-24-007) — Requirement paragraph","Time-bound compliance with two deadlines (12 months for inspection; before further flight for rectification) — Compliance","Safety‑critical scope spanning multiple aircraft locations (underfloor electrical bay, flight deck, etc.) which may increase inspection effort — Background"],"plain_english_summary":"This Airworthiness Directive requires operators of all BAe 146 aeroplanes to inspect and test every three‑phase circuit breaker, associated wiring and panels, using the BAe inspection procedure (or an accepted equivalent), within 12 months. Any damaged wiring or unserviceable breakers must be repaired or replaced before the aircraft flies again. The AD is aimed at addressing age‑related deterioration that can cause overheating, smoke or fire; it therefore creates direct costs for operators in inspection time, parts and aircraft downtime."},"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-bae-146-124-three-phase-circuit-breakers","history":"/api/acts/ad-bae-146-124-three-phase-circuit-breakers/history","analysis":"/api/acts/ad-bae-146-124-three-phase-circuit-breakers/analysis","conflicts":"/api/acts/ad-bae-146-124-three-phase-circuit-breakers/conflicts","importantCases":"/api/acts/ad-bae-146-124-three-phase-circuit-breakers/important-cases","documents":"/api/acts/ad-bae-146-124-three-phase-circuit-breakers/documents"}}