{"id":"F2007L02351","name":"AD/AMD 50/42 - Electrical Power","slug":"ad-amd-50-42-electrical-power","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67672,"registerId":"commonwealth-F2007L02351-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AMD Falcon 50 and 900 Series Aeroplanes","sectionType":"division","heading":"AMD Falcon 50 and 900 Series Aeroplanes","content":"### AMD Falcon 50 and 900 Series Aeroplanes\n\n| AD/AMD 50/42 | Electrical Power | 9/2007 |\n| ------------ | ---------------- | ------ |\n\n| Applicability: | Mystere-Falcon 50 aeroplanes, serial number (S/N) 251 together with S/N 253 and subsequent, without modification M3093 implemented.                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Check for damages to the electrical feeder bundle, repair as necessary, and modify its routing as detailed in the accomplishment instructions paragraph of the Dassault Aviation Service Bulletin (SB) F50-483 initial issue dated 6 June 2007 or later approved revision.                                                                                                                                                                                                                                       |\n|                | Note: EASA AD 2007-0175 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Compliance:    | No later than 12 August 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | The European Aviation Safety Agency (EASA) has been advised by the aircraft manufacturer of reports of chafing between an electrical feeder bundle and a bus bar under the circuit breaker panel. This chaffing could lead to loss of electrical power to some systems and may result smoke and/or fire.This Directive requires an inspection of the electrical feeder bundle, repair if necessary and modification of its routing under the circuit breaker panel through implementation of modification M3093. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n17 July 2007","sortOrder":0},{"sectionNumber":"AD/AMD 50/42","sectionType":"part","heading":"AD/AMD 50/42","content":"## AD/AMD 50/42","sortOrder":1},{"sectionNumber":"Electrical Power","sectionType":"part","heading":"Electrical Power","content":"## Electrical Power","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect identified by the manufacturer. The scope remains precisely limited to the identified wiring issue in specified aircraft serial numbers."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined term (S/N for serial number)","Single, straightforward compliance requirement with clear deadline","No cross-references to other legislation beyond a single note referencing the EASA AD","No conditional logic or nested exceptions — applies to specific serial numbers or not","Clear, unambiguous applicability criteria"],"plain_english_summary":"This AD orders owners/operators of certain Dassault Falcon 50 jets (s/n 251, 253 and later) that lack modification M3093 to inspect and correct a chafing electrical feeder bundle under the circuit‑breaker panel per Dassault SB F50‑483. Chafing can cause loss of power, smoke, or fire. Work must be done by 12 August 2008 to restore airworthiness and avoid illegal flight in Australia."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD stays within the original technical purpose stated in its background: to eliminate chafing of an electrical feeder bundle that could cause loss of power, smoke or fire. It prescribes the manufacturer’s corrective action (inspection, repair, and routing modification M3093) and does not broaden the subject beyond that remedy. There is no indication in the text that the directive expanded its scope beyond that original, single safety issue."},"complexity_factors":["Short, single-topic Airworthiness Directive with one core mandatory action (inspection/repair and routing modification).","Narrow applicability (specific serial numbers) limits scope but raises potential ambiguity in wording: “S/N 251 together with S/N 253 and subsequent”.","One external technical reference: Dassault Service Bulletin F50-483 (initial issue 6 June 2007) or later approved revision — creates dependency on approved revisions.","Cross-reference to EASA AD 2007-0175 (external regulatory document).","Single compliance deadline and effective date (straightforward timeline).","No nested exceptions or detailed conditional logic beyond “repair as necessary” and exception for aircraft that already have M3093."],"plain_english_summary":"**What this directive does (mechanics)**\n\n- It orders a mandatory inspection and, if required, repair of a particular electrical feeder bundle on certain Dassault Falcon 50/900 series aeroplanes, and requires changing the routing of that feeder bundle by implementing modification M3093.\n- The work must follow the instructions in Dassault Aviation Service Bulletin F50-483 (initial issue 6 June 2007) or a later revision approved by the regulator.\n- The specific compliance deadline given in the text is 12 August 2008; the directive itself became effective on 30 August 2007.\n\n**Who is affected**\n\n- Operators and owners of Mystere–Falcon 50 aeroplanes with serial number (S/N) 251 together with S/N 253 and subsequent, **unless modification M3093 has already been implemented** on the aeroplane.\n- Maintenance organisations and certificated mechanics who will carry out the inspection, repair and modification according to the Dassault service instructions.\n\n**Why it matters (safety and operational effect)**\n\n- The manufacturer reported incidents of the electrical feeder bundle chafing against a bus bar located under the circuit breaker panel. That chafing can cause partial or total loss of electrical power to systems and can produce smoke or fire.\n- The mandated inspection, repair as necessary, and rerouting/modification (M3093) are intended to remove the chafing risk by physically separating and protecting the wiring, thereby reducing the risk of electrical failure, smoke or fire.\n\n**Who pays, who decides, and what changes in behaviour**\n\n- Aircraft owners/operators bear the cost and operational impact (labour, materials, downtime) of carrying out the inspection, any repairs, and the routing modification.\n- The regulator (the Civil Aviation Safety Authority under the AD mechanism) requires compliance; maintenance must be performed to the Dassault Service Bulletin or an approved revision.\n- Operators must schedule aircraft downtime for inspection and any corrective work and must either confirm M3093 is already installed or implement it.\n\n**Practical implementation notes, trade-offs and risks**\n\n- The economic cost is direct and concentrated on the affected operators: labour to inspect, parts and labour to repair, and time out of service while modification M3093 is carried out.\n- The safety benefit is concentrated on the same fleet (reduced fire/electrical-failure risk). The directive trades a modest immediate maintenance cost and aircraft downtime for reduced risk of electrical failure and fire.\n- Compliance depends on following a manufacturer service bulletin “or later approved revision”, which creates a dependency on any future approved SB updates and on the regulator’s approval process.\n- Implementation risks include scheduling difficulty (aircraft availability), potential needs for approved parts or certified repair station work, and minor ambiguity in the applicability phrasing that operators must resolve with their authority (i.e. exactly which serial-numbered aircraft are captured and whether the aircraft already has M3093).\n\n**Source claims and verification path**\n\n- The AD cites manufacturer reports of chafing between a feeder bundle and a bus bar and references EASA AD 2007-0175. The directive implements the manufacturer’s mitigation (SB F50-483 / modification M3093). These are claims about causation and remedy; the AD enforces the manufacturer’s procedural remedy rather than conducting an independent cost–benefit analysis itself.\n\n(Reference: Requirement and Background sections of the AD.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-50-42-electrical-power","history":"/api/acts/ad-amd-50-42-electrical-power/history","analysis":"/api/acts/ad-amd-50-42-electrical-power/analysis","conflicts":"/api/acts/ad-amd-50-42-electrical-power/conflicts","importantCases":"/api/acts/ad-amd-50-42-electrical-power/important-cases","documents":"/api/acts/ad-amd-50-42-electrical-power/documents"}}