{"id":"F2006L00367","name":"AD/BELL 412/48 - Overhead Circuit Breaker Panels","slug":"ad-bell-412-48-overhead-circuit-breaker-panels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116985,"registerId":"commonwealth-F2006L00367-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 412 Series Helicopters","content":"### Bell Helicopter Textron 412 Series Helicopters\n\n| AD/BELL 412/48 | Overhead Circuit Breaker Panels | 3/2006 |\n| -------------- | ------------------------------- | ------ |\n\n| Applicability: | Agusta-Bell AB 412 helicopters.                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | If not previously accomplished, inspect and, if necessary, modify the overhead circuit breaker panels and wire harness installation in accordance with Agusta Alert Service Bulletin 412-81 dated 23 June 2000.                                                                                                                                                                                                       |\n|                | Note: ENAC (Italy) AD 2000-331 refers.                                                                                                                                                                                                                                                                                                                                                                                |\n| Compliance:    | Within 30 days after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                      |\n| Background:    | The Ente Nazionale per l’Aviazione Civile (ENAC) of Italy has advised that an AB 412 operator has reported an electrical short circuit occurring with overheating and wires burning in the overhead circuit breaker panels.This Directive requires the inspection and/or modification of the overhead circuit breaker panels to prevent chafing and interference between wire harnesses and structures or components. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/BELL 412/48","sectionType":"part","heading":"AD/BELL 412/48","content":"## AD/BELL 412/48","sortOrder":1},{"sectionNumber":"Overhead Circuit Breaker Panels","sectionType":"part","heading":"Overhead Circuit Breaker Panels","content":"## Overhead Circuit Breaker Panels","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive enforces inspection/modification for the stated hazard on AB 412 helicopters and sets a 30‑day compliance deadline; it does not expand applicability or introduce new regulatory subjects beyond the original safety response described (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability limited to Agusta‑Bell AB 412 helicopters (Applicability)","Requires inspection and possible modification to wiring and breaker panels per Agusta Alert Service Bulletin 412‑81 (Requirement)","Short compliance window of 30 days increases scheduling and operational disruption risk (Compliance)","Technical work may need aircraft downtime and qualified maintenance personnel or parts (Requirement / Background)","Dependence on manufacturer's service bulletin for procedures and acceptable corrective action (Requirement)","Issued in response to an ENAC incident report of overheating and wire burning, creating a clear safety trigger but limited scope (Background)"],"plain_english_summary":"This directive requires Agusta‑Bell AB 412 operators to inspect and, if needed, modify the overhead circuit breaker panels and associated wire harnesses to prevent chafing, short circuits and overheating, following Agusta Alert Service Bulletin 412‑81. Operators must complete the work within 30 days, so the operator bears the inspection, modification cost and aircraft downtime; the measure responds to an ENAC report of wiring overheating (Requirement; Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with narrow, targeted scope addressing a specific safety defect in a specific aircraft type. No scope creep evident."},"complexity_factors":["Single, specific technical requirement with clear reference to external manufacturer bulletin","No defined terms section — uses plain operational language","Simple conditional logic: 'if not previously accomplished, inspect and modify'","Single compliance deadline (30 days from effective date)","No cross-references to other legislation or complex procedural requirements","Short document — essentially a safety notice with mandatory status"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's aviation regulator (CASA) requiring specific maintenance actions on certain helicopters.\n\n**What it does:**\nOrders owners and operators of **Agusta-Bell AB 412 helicopters** to inspect and potentially modify the overhead circuit breaker panels and wire harnesses within 30 days of 16 March 2006.\n\n**Why it matters:**\nAn Italian operator reported an electrical short circuit that caused overheating and burning wires in these panels. The directive aims to prevent dangerous \"chafing\" (wear from rubbing) and interference between wires and aircraft structures that could cause fires or electrical failures.\n\n**Who must comply:**\nAnyone operating Agusta-Bell AB 412 helicopters in Australia that haven't already made these modifications.\n\n**What must be done:**\nFollow the specific technical instructions in **Agusta Alert Service Bulletin 412-81** (dated 23 June 2000) — this is the manufacturer's official repair notice referenced by the directive."},"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-bell-412-48-overhead-circuit-breaker-panels","history":"/api/acts/ad-bell-412-48-overhead-circuit-breaker-panels/history","analysis":"/api/acts/ad-bell-412-48-overhead-circuit-breaker-panels/analysis","conflicts":"/api/acts/ad-bell-412-48-overhead-circuit-breaker-panels/conflicts","importantCases":"/api/acts/ad-bell-412-48-overhead-circuit-breaker-panels/important-cases","documents":"/api/acts/ad-bell-412-48-overhead-circuit-breaker-panels/documents"}}