{"id":"F2008L02666","name":"AD/EMB-145/6 - Wiring Harness W407","slug":"ad-emb-145-6-wiring-harness-w407","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74703,"registerId":"commonwealth-F2008L02666-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer EMB-135 and EMB-145 Series Aerop","sectionType":"division","heading":"Embraer EMB-135 and EMB-145 Series Aeroplanes","content":"### Embraer EMB-135 and EMB-145 Series Aeroplanes\n\n| AD/EMB-145/6 | Wiring Harness W407 | 8/2008 |\n| ------------ | ------------------- | ------ |\n\n| Applicability: | EMB-145( ) aeroplanes, serial numbers 145004 through 145129 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | If not previously accomplished, modify the routing of wiring harness W407 at the rear of both engines, near the fire extinguishing tube, and install new supports to the derivations of harness W407 that go to connectors P0321, P0915 and P0819, in accordance with the detailed instructions and procedures described in Embraer Service Bulletin 145-71-0008, original issue, or later revisions approved by the Brazilian Departamento de Aviação Civil (DAC) - Centro Técnico Aeroespacial (CTA) or Agência Nacional de Aviação Civil (ANAC). |\n|                | Note: DAC AD 2005-10-05 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Compliance:    | Within the next 5,000 hours time in service after 17 November 2005 (the effective date of DAC AD 2005-10-05).                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 31 July 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | It has been found the incidents of chafing of the harness W407 with the supports and the nacelle structure at the engine area have occurred, resulting in uncommanded in-flight engine shutdowns.                                                                                                                                                                                                                                                                                                                                                   |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 June 2008","sortOrder":0},{"sectionNumber":"AD/EMB-145/6","sectionType":"part","heading":"AD/EMB-145/6","content":"## AD/EMB-145/6","sortOrder":1},{"sectionNumber":"Wiring Harness W407","sectionType":"part","heading":"Wiring Harness W407","content":"## Wiring Harness W407","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies to the specified EMB-145 serial numbers and mandates modification per the Embraer service bulletin; it references the earlier DAC AD but does not indicate any substantive expansion or narrowing of the population or required action within the text provided."},"complexity_factors":["Narrow applicability limited to specific serial-numbered aircraft (Applicability).","Technical maintenance work (re-routing harness, installing supports) requiring qualified personnel and parts (Requirement).","Compliance measured in flight hours, creating tracking and scheduling obligations for operators (Compliance).","Reliance on a manufacturer service bulletin as the mandated procedure, and allowance only for later revisions approved by foreign aviation authorities (Requirement).","Safety-critical context (risk of in-flight engine shutdowns) increases priority and potential regulatory oversight (Background).","Cross-reference to a prior foreign AD (DAC AD 2005-10-05) introduces inter-jurisdictional administrative dependencies (Requirement/Note)."],"plain_english_summary":"Requires operators of EMB-145 aeroplanes (serial numbers 145004–145129) to re-route wiring harness W407 at the rear of both engines and fit new supports per Embraer Service Bulletin 145-71-0008 (Requirement). The action responds to harness chafing that has caused uncommanded in-flight engine shutdowns (Background). Operators bear the cost and must complete the work within 5,000 flight hours after 17 November 2005; later service bulletin revisions require approval by Brazilian DAC/CTA or ANAC (Compliance; Requirement)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a wiring modification."},"complexity_factors":["Single, specific technical requirement with clear reference to manufacturer service bulletin","Only one defined applicability criterion (serial number range)","Simple compliance deadline (flight hours-based)","No nested exceptions or conditional logic","Short document (approximately 200 words of substantive content)","Single cross-reference to Brazilian aviation authority directive"],"plain_english_summary":"This CASA Airworthiness Directive orders operators of Embraer EMB‑145 aircraft (serials 145004–145129) to fix a chafing wiring harness (W407) at the rear of both engines that has caused in‑flight engine shutdowns. It mandates rerouting the wiring and fitting new supports per Embraer’s service bulletin, to be completed within 5,000 flight hours after 17 November 2005."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-145-6-wiring-harness-w407","history":"/api/acts/ad-emb-145-6-wiring-harness-w407/history","analysis":"/api/acts/ad-emb-145-6-wiring-harness-w407/analysis","conflicts":"/api/acts/ad-emb-145-6-wiring-harness-w407/conflicts","importantCases":"/api/acts/ad-emb-145-6-wiring-harness-w407/important-cases","documents":"/api/acts/ad-emb-145-6-wiring-harness-w407/documents"}}