{"id":"F2008L04567","name":"AD/ERJ-170/18 Amdt 1 - Electrical Wiring and ARINC 429 Data Bus","slug":"ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120883,"registerId":"commonwealth-F2008L04567-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer ERJ-170 Series Aeroplanes","sectionType":"division","heading":"Embraer ERJ-170 Series Aeroplanes","content":"### Embraer ERJ-170 Series Aeroplanes\n\n| AD/ERJ-170/18 Amdt 1 | Electrical Wiring and ARINC 429 Data Bus | 1/2009 |\n| -------------------- | ---------------------------------------- | ------ |\n\n| Applicability: | ERJ 170-100 STD, ERJ 170-100 LR, ERJ 170-100 SU, ERJ 170-100 SE,ERJ 170-200 STD, ERJ 170-200 LR and ERJ 170-200 SU, with serial numbers (S/N) identified in Embraer Service Bulletins (SB) 170-24-0019 original issue, dated6 December 2006, 170-24-0020 original issue, dated 30 November 2006, and170-31-0020 original issue, dated 20 July 2007.                            |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Modify the electrical wiring on the overhead panel in the cockpit in accordance with SB 170-24-0019 original issue.                                                                                                                                                                                                                                                         |\n|                | 2. Change the Air Data Smart Probe 3 channel B power supply bus from ESS2 to ESS3, in accordance with SB 170-24-0020 original issue.                                                                                                                                                                                                                                           |\n|                | 3. Duplicate the ARINC 429 airspeed signal for an extension longer than the rotor burst impact area; change the primary power source for MAU 2 from DC BUS 2 to DC ESS BUS 2; and, change the wiring of Slat/Flap Actuators Control Electronics (SF-ACE) 1 and 2 to Primary Actuator Control Electronics (P-ACE) 1, 2 and 3, in accordance with SB 170-31-0020 original issue. |\n|                | Later revision of the above SBs, approved by the Brazilian Agência Nacional de Aviação Civil (ANAC), are acceptable for compliance with the relevant requirements of this Directive.                                                                                                                                                                                           |\n|                | Note: ANAC AD 2008-09-01 refers.                                                                                                                                                                                                                                                                                                                                               |\n| Compliance:    | For Requirements 1, 2 and 3 - Within the next 6000 hours time in service after the effective date of the original issue of this Directive.                                                                                                                                                                                                                                     |\n|                | This Amendment becomes effective on 15 January 2009.                                                                                                                                                                                                                                                                                                                           |\n| Background:    | The ANAC has advised that a re-assessment of rotor burst analysis has shown the possibility of loss of electrical power supply to the following aircraft systems could result in loss of the aircraft pitch and yaw control:Air data, ailerons, multifunctional spoilers and rudder.                                                                                           |\n\n|     | Since the loss of aircraft pitch and yaw control affects flight safety, the original issue of this Directive mandated corrective actions.                                                                                                                                                                                |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|     | This Amendment results from advice from an Australian operator that the dates associated with the service bulletins referenced in the original issue of this Directive were incorrect. The dates used were based on those in the original ANAC Directive and are corrected by this Amendment, no other changes are made. |\n|     | The original issue of this Directive became effective on 20 November 2008.                                                                                                                                                                                                                                               |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n28 November 2008","sortOrder":0},{"sectionNumber":"AD/ERJ-170/18 Amdt 1","sectionType":"part","heading":"AD/ERJ-170/18 Amdt 1","content":"## AD/ERJ-170/18 Amdt 1","sortOrder":1},{"sectionNumber":"Electrical Wiring and ARINC 429 Data Bus","sectionType":"part","heading":"Electrical Wiring and ARINC 429 Data Bus","content":"## Electrical Wiring and ARINC 429 Data Bus","sortOrder":2},{"sectionNumber":"1/2009","sectionType":"part","heading":"1/2009","content":"## 1/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"This amendment corrects incorrect dates for the referenced Embraer service bulletins; it does not change the substantive modification requirements, compliance timeframe (6,000 flight hours) or affected serial‑number applicability from the original directive."},"complexity_factors":["Safety‑critical electrical and data‑bus modifications affecting multiple flight‑control related systems (airspeed, ailerons, spoilers, rudder).","Multiple distinct technical actions across different service bulletins (overhead wiring, power bus refeed, ARINC 429 duplication and actuator wiring changes).","Applicability limited to specific serial numbers listed in the referenced service bulletins, requiring accurate fleet tracking and record checks.","Compliance measured in flight hours (6000 hours), imposing scheduling and operational planning costs (downtime).","Technical work requires certified avionics/maintenance personnel and appropriate shop capability, raising direct cost and capacity constraints for operators.","Acceptable compliance includes later SB revisions only if approved by ANAC, introducing regulatory coordination and potential approval lag.","The amendment itself only corrects service bulletin dates (no substantive scope change), but reliance on external SB versions creates implementation dependency on manufacturer documentation."],"plain_english_summary":"This directive requires certain Embraer ERJ‑170 aeroplanes to have cockpit and ARINC 429 data‑bus wiring changes carried out in accordance with Embraer service bulletins approved by ANAC. \n\nOperators of affected serial numbers must complete the work within 6,000 flight hours; CASA issued the directive after ANAC found some electrical power losses could lead to loss of pitch and yaw control. Operators pay for compliance and must schedule certified maintenance, creating aircraft downtime and technical compliance tasks."},"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":3,"scope_assessment":{"changed":false,"description":"This amendment makes no substantive changes to the scope. It is purely a technical correction of dates in the referenced Service Bulletins. The safety requirements, affected aircraft, and compliance deadlines remain identical to the original directive."},"complexity_factors":["Highly technical aviation-specific terminology (ARINC 429 data bus, rotor burst impact area, SF-ACE, P-ACE, MAU)","Multiple cross-references to external technical documents (three specific Embraer Service Bulletins with original issue dates)","Specific aircraft serial number applicability requiring lookup in external documents","Conditional acceptance of later revisions of Service Bulletins if approved by Brazilian authority (ANAC)","Time-based compliance calculation (6000 hours 'time in service' from effective date)"],"plain_english_summary":"This CASA Airworthiness Directive mandates three electrical-system modifications on specified Embraer ERJ‑170 variants to provide redundant power and data paths for critical flight‑control systems. It targets aircraft listed in Embraer service bulletins and must be done within 6,000 flight hours.\n\nThe fixes respond to ANAC findings that an engine rotor burst could cut power to pitch and yaw controls, risking loss of control. This amendment only corrects service‑bulletin dates; the safety requirements are unchanged."}},"importantCases":[],"_links":{"self":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus","history":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus/history","analysis":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus/analysis","conflicts":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus/conflicts","importantCases":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus/important-cases","documents":"/api/acts/ad-erj-170-18-amdt-1-electrical-wiring-and-arinc-429-data-bus/documents"}}