{"id":"F2005L03167","name":"AD/EMB-120/36 Amdt 1 - Rotating Beacon Electrical Bonding","slug":"ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":134405,"registerId":"commonwealth-F2005L03167-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer EMB-120 (Brasilia) Series Aeropl","sectionType":"division","heading":"Embraer EMB-120 (Brasilia) Series Aeroplanes","content":"### Embraer EMB-120 (Brasilia) Series Aeroplanes\n\n| AD/EMB-120/36 Amdt 1 | Rotating Beacon Electrical Bonding | 12/2005 |\n| -------------------- | ---------------------------------- | ------- |\n\n| Applicability: | All EMB-120 model aeroplanes.                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Install a bonding jumper between the rotating beacon and the airframe in accordance with Embraer Service Bulletin 120-33-0037 dated 5 November 2003 or later revision approved by Brazilian Centro Técnico Aeroespacial (CTA).                                                                                                                                              |\n|                | Note: DAC (Brazil) AD 2004-01-06 refers.                                                                                                                                                                                                                                                                                                                                    |\n| Compliance:    | Within 4000 hours time in service or 30 calendar months, whichever occurs first, after the effective date of the original issue of this Directive.                                                                                                                                                                                                                          |\n|                | This Amendment becomes effective on 24 November 2005.                                                                                                                                                                                                                                                                                                                       |\n| Background:    | The Brazilian Departmento de Aviação (DAC) has advised that, due to a deficiency in the electrical bonding of the rotating beacon, there is an increased possibility of lightning strikes which may damage the aircraft electrical system. The original issue of this Directive required the installation of improved bonding between the rotating beacon and the airframe. |\n|                | This amendment does not change the requirement for the installation of improved bonding but introduces alternate methods of compliance by allowing compliance in accordance with later service bulletins revisions which have been approved by the CTA.                                                                                                                     |\n|                | The original issue of this Airworthiness Directive became effective on 18 March 2004.                                                                                                                                                                                                                                                                                       |\n\n![](image.001.png)  \nJayaprakashan Ambali  \nDelegate of the Civil Aviation Safety Authority\n\n12 October 2005","sortOrder":0},{"sectionNumber":"AD/EMB-120/36 Amdt 1","sectionType":"part","heading":"AD/EMB-120/36 Amdt 1","content":"## AD/EMB-120/36 Amdt 1","sortOrder":1},{"sectionNumber":"Rotating Beacon Electrical Bonding","sectionType":"part","heading":"Rotating Beacon Electrical Bonding","content":"## Rotating Beacon Electrical Bonding","sortOrder":2},{"sectionNumber":"12/2005","sectionType":"part","heading":"12/2005","content":"## 12/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The amendment does not alter the substantive obligation to install improved electrical bonding between the rotating beacon and airframe. It only permits compliance using later revisions of Embraer Service Bulletin 120-33-0037 provided those revisions are approved by the Brazilian CTA. Applicability, the required action, and the compliance time limit remain as in the original Directive (Requirement; Background; Compliance)."},"complexity_factors":["Applicability: applies to every EMB-120 model aeroplane, so all operators of that type are affected (Applicability).","Technical task: requires physical installation of an electrical bonding jumper between rotating beacon and airframe (Requirement).","Normative reference: compliance is tied to a specific Embraer Service Bulletin (120-33-0037 dated 5 Nov 2003) or later CTA-approved revision, so operators must use that procedure (Requirement).","Regulatory discretion: acceptance of later revisions depends on approval by the Brazilian CTA, introducing a decision point outside CASA (Requirement).","Timing: a dual compliance window—4,000 hours time in service or 30 calendar months, whichever occurs first—creates a definite scheduling and maintenance-planning constraint (Compliance).","Cross-reference: the AD notes and aligns with Brazilian DAC AD 2004-01-06, requiring operators to track related foreign directives (Background).","Administrative effect: the Amendment itself only broadens allowable service-bulletin revisions rather than changing the core technical obligation, so administrative review of revised SBs may be necessary (Background)."],"plain_english_summary":"Requires installation of a bonding jumper between the rotating beacon and the airframe on all Embraer EMB-120 aeroplanes, performed in accordance with Embraer Service Bulletin 120-33-0037 (5 Nov 2003) or a later revision approved by the Brazilian Centro Técnico Aeroespacial (CTA). The Directive responds to DAC advice that deficient beacon bonding raises the risk of lightning damage to the aircraft electrical system; compliance must occur within 4,000 flight hours or 30 calendar months."},"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":2,"scope_assessment":{"changed":false,"description":"The amendment explicitly states it does not change the original requirement for improved bonding; it only introduces alternate methods of compliance. The scope remains identical to the original directive."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 substantive requirement with clear alternative compliance path","No defined terms section","No cross-references to other legislation","Simple conditional logic: 'whichever occurs first' for compliance timing","Single amendment that merely expands compliance options without altering substantive requirement"],"plain_english_summary":"This CASA Airworthiness Directive mandates that all Embraer EMB‑120 (Brasilia) owners/operators in Australia install an electrical bonding jumper to ground the rotating beacon and reduce lightning-related electrical damage. The November 2005 amendment doesn’t change the required modification but allows compliance using later manufacturer procedures approved by Brazil’s CTA. Operators must complete the work within 4,000 flight hours or 30 months, whichever occurs first."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding","history":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding/history","analysis":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding/analysis","conflicts":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding/conflicts","importantCases":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding/important-cases","documents":"/api/acts/ad-emb-120-36-amdt-1-rotating-beacon-electrical-bonding/documents"}}