{"id":"F2008L04404","name":"AD/EMB-120/48 - APU Mounting Rods","slug":"ad-emb-120-48-apu-mounting-rods","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76377,"registerId":"commonwealth-F2008L04404-current","compilationNumber":null,"startDate":"2026-04-02","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-120/48 | APU Mounting Rods | 13/2008 |\n| ------------- | ----------------- | ------- |\n\n| Applicability: | Model EMB-120, EMB-120ER, EMB-120FC, EMB-120QC, and EMB-120RT aircraft, as identified in Embraer Service Bulletin No. 120-49-0023 Revision 01, dated 30 June 2008, or later ANAC approved revision. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of ANAC AD 2008-08-01 Amdt39-1240.                                                                                                                       |\n| Compliance:    | Within 1,500 flight hours or 6 months after 18 December 2008, whichever occurs first.                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 18 December 2008.                                                                                                                                 |\n| Background:    | Reports were received of corrosion on the APU mounting rods. Undetected corrosion could result in rod failure.                                                                                      |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 October 2008","sortOrder":0},{"sectionNumber":"AD/EMB-120/48","sectionType":"part","heading":"AD/EMB-120/48","content":"## AD/EMB-120/48","sortOrder":1},{"sectionNumber":"APU Mounting Rods","sectionType":"part","heading":"APU Mounting Rods","content":"## APU Mounting Rods","sortOrder":2},{"sectionNumber":"13/2008","sectionType":"part","heading":"13/2008","content":"## 13/2008","sortOrder":3}],"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":4,"scope_assessment":{"changed":false,"description":"The directive adopts remedial action specified by ANAC and Embraer for corrosion on APU mounting rods affecting listed EMB-120 variants. The instrument does not expand or narrow the stated technical scope in the source text; it implements those external requirements within the stated compliance window (Applicability / Requirement / Compliance / Background)."},"complexity_factors":["Cross-reference to external foreign airworthiness directive (ANAC AD 2008-08-01 Amdt39-1240) and a manufacturer Service Bulletin (Applicability / Requirement) increases procedural dependency and creates coordination needs.","Applicability spans multiple EMB-120 variants and is tied to a specific Service Bulletin revision, requiring operators to confirm model and SB revision status (Applicability).","Time-limited compliance obligation (1,500 flight hours or 6 months after effective date) imposes operational scheduling and potential aircraft downtime (Compliance).","Safety-critical technical work (inspection, possible repair/replacement of APU mounting rods) requires certified maintenance action and parts, affecting cost and logistics (Requirement / Background).","Directive furnishes limited procedural detail locally and delegates substantive technical instructions to the ANAC AD and Embraer SB, constraining local regulatory discretion but increasing reliance on external documents (Requirement).","Effective date and administrative signage (becomes effective 18 December 2008; delegate signature) create hard enforcement timing and record-keeping requirements (Compliance / Delegate)."],"plain_english_summary":"This Airworthiness Directive requires operators of Embraer EMB-120 series aeroplanes to inspect and, where necessary, repair or replace APU mounting rods by following ANAC AD 2008-08-01 Amdt39-1240 and Embraer Service Bulletin No. 120-49-0023 Rev 01. Compliance must occur within 1,500 flight hours or six months after 18 December 2008. The measure responds to reported corrosion that could cause rod failure; operators pay for inspections and any corrective work and must schedule it within the stated safety window."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific mechanical defect in a specific aircraft type. The scope remains precisely limited to APU mounting rod corrosion in Embraer EMB-120 series aircraft, consistent with the original safety concern identified."},"complexity_factors":["Very short document (under 300 words)","Only 5 defined models in applicability","Single compliance pathway with clear deadline","No nested exceptions or conditional logic","References external technical documents rather than reproducing them","Straightforward cause-and-effect: corrosion found → inspection mandated"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Embraer EMB-120 series aircraft to inspect and repair corroded APU mounting rods to prevent rod failure and potential APU detachment.  \n\nCompliance follows ANAC AD 2008-08-01 (via Embraer Service Bulletin 120-49-0023) within 1,500 flight hours or six months after 18 December 2008; ignoring the AD is illegal and grounds for grounding the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-120-48-apu-mounting-rods","history":"/api/acts/ad-emb-120-48-apu-mounting-rods/history","analysis":"/api/acts/ad-emb-120-48-apu-mounting-rods/analysis","conflicts":"/api/acts/ad-emb-120-48-apu-mounting-rods/conflicts","importantCases":"/api/acts/ad-emb-120-48-apu-mounting-rods/important-cases","documents":"/api/acts/ad-emb-120-48-apu-mounting-rods/documents"}}