{"id":"F2006B09515","name":"AD/EMB-120/28 Amdt 1 - Electrical Wiring Overheat","slug":"ad-emb-120-28-amdt-1-electrical-wiring-overheat","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54090,"registerId":"commonwealth-F2006B09515-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-120/28 Amdt 1 - Electrical Wiring Overheat","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/EMB-120/28 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nEmbraer EMB-120 (Brasilia) Series Aeroplanes\n\nAD/EMB-120/28\n\nAmdt 1\n\n  \n\nElectrical Wiring Overheat 8/2002 DM\n\nApplicability: Embraer 120 series aeroplanes with Serial Numbers 120004 and 120006 through 120352 inclusive.\n\nRequirement: 1. Visually check Pitot/Static 1, 2 and auxiliary sensors; Left and Right Hand Angle of Attack (AoA) sensors; Side Slip sensors; and current sensors wiring, splices and relays for signs of overheating in accordance with Embraer Service Bulletin (SB) 120-30-0030 Revision 01 dated 28 November 2000.\n\n    2. If, during the Requirement 1 check, any signs of overheating are detected, replace the affected items in accordance with SB 120-30-0030 Revision 01.\n\n    3. If, during the Requirement 1 check, signs of overheating were not detected, replace the wiring and relays in accordance with SB 120-30-0030 Revision 01.\n\nNote 1: Incorporation of SB 120-30-0030 dated 31 January 2000 is only partial compliance with this Directive.\n\nNote 2: CTA AD 2001-06-02 Amdt 39-907 refer.\n\nCompliance: For Requirement 1 \\- Remains unchanged as “Within 400 hours time in service (TIS) after the effective date of the original issue of this Directive”.\n\nFor Requirement 2 \\- Before further flight after the Requirement 1 inspection.\n\nFor Requirement 3 \\- Within 2000 hours TIS after the completion of the Requirement 1 inspection.\n\nThis Amendment becomes effective on 19 June 2002.\n\nBackground: Embraer has received reports of overheating of some electrical wires that energise the Pitot/Static 1, 2 and auxiliary sensors; AoA sensors; slide slip sensor and associated current sensors. Overheating of the wires is mainly due to the heat generated at the relays and splices.\n\nEmbraer EMB-120 (Brasilia) Series Aeroplanes\n\nAD/EMB-120/28 Amdt 1 (continued)\n\nThe original issue of this Directive required an inspection, repair of any damaged wiring found during the inspection and eventual replacement of the wiring.\n\nThis Amendment changes the compliance period for Requirement 3, aligning with that of the Brazilian Directive.\n\nThe original issue of this Airworthiness Directive became effective on 9 August 2001.\n\n![Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 7 June 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 19 June 2002.","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The Amendment changes the compliance period for Requirement 3 to “Within 2000 hours time in service after the completion of the Requirement 1 inspection,” aligning the replacement timing with the Brazilian Directive. Applicability and the 400‑hour inspection requirement remain unchanged; the amendment modifies only the scheduled replacement deadline and clarifies sequencing of inspection → conditional immediate repair → timed replacement."},"complexity_factors":["Narrow applicability: specific Embraer EMB‑120 serial numbers (120004 and 120006–120352) — reduces scope but requires serial verification.","Three-tiered compliance structure: Requirement 1 (inspection), Requirement 2 (immediate replacement if overheating found), Requirement 3 (scheduled replacement if no overheating) — adds sequencing.","Multiple affected systems: pitot/static 1, 2 and auxiliary sensors; left/right AoA sensors; sideslip sensors; associated current sensors — multiple access points and trades involved.","Time-based deadlines: inspection within 400 hours TIS; immediate action before further flight for detected damage; replacement within 2000 hours TIS if no damage — operational planning impact.","Procedural dependency: work must follow Embraer Service Bulletin 120‑30‑0030 Revision 01 (external document) — operators must obtain and follow SB instructions.","Partial-compliance caveat: Note states earlier SB dated 31 Jan 2000 only partially complies — potential for interpretation/dispute over compliance sufficiency.","Regulatory alignment: Amendment explicitly aligns Requirement 3 timing with the Brazilian directive — cross-jurisdiction coordination element.","Enforcement and decision-maker: CASA delegate issued and enforces the AD under CAR 1998 subregulation 39.1(1) — administrative discretion in issuance.","Practical ambiguity: 'Signs of overheating' is a visual standard referenced to the SB, which may require judgment by maintenance personnel."],"plain_english_summary":"This Airworthiness Directive revokes the earlier AD and changes inspection and replacement rules for electrical wiring and relays that power pitot/static, angle‑of‑attack, sideslip and related current sensors on Embraer EMB‑120 aeroplanes (Serial Nos. 120004 and 120006–120352). It requires a visual inspection within 400 hours TIS, immediate replacement of any overheated items before further flight, and replacement of wiring/relays within 2000 hours TIS if no overheating is found.\n\nOwners/operators must fund and perform the required work in accordance with Embraer Service Bulletin 120‑30‑0030 Revision 01; CASA amended the timing to align with the Brazilian authority."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment makes a minor technical adjustment to the compliance timeframe for Requirement 3 (replacement of wiring when no overheating is detected), aligning it with the Brazilian aviation regulator's timeline. The core safety purpose — addressing overheating electrical wiring in critical flight sensors — remains unchanged from the original August 2001 directive."},"complexity_factors":["Single, clearly defined applicability (specific aircraft serial numbers)","Only 3 numbered requirements with straightforward conditional logic (if/then)","Minimal cross-referencing — only refers to one Embraer Service Bulletin and one related foreign directive","No defined terms section; technical terms are either self-explanatory or standard aviation terminology","Short document (approximately 400 words) with clear structure: Applicability, Requirement, Compliance, Background","Compliance deadlines are simple time-in-service calculations"],"plain_english_summary":"This AD requires owners/operators of specified Embraer EMB‑120 Brasilia aircraft (certain serial numbers) to inspect and replace overheating electrical wiring, relays, and splices that power pitot/static, angle‑of‑attack, and sideslip sensors. Damage found must be corrected before further flight; even if no damage is found, wiring/relays must be replaced within the specified hours. It’s a safety‑critical fix to prevent sensor failures or electrical fire; the amendment aligns the replacement deadline with Brazil’s timeline."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat","history":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat/history","analysis":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat/analysis","conflicts":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat/conflicts","importantCases":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat/important-cases","documents":"/api/acts/ad-emb-120-28-amdt-1-electrical-wiring-overheat/documents"}}