{"id":"F2006B04281","name":"AD/BEECH 90/98 - KA-33 Cooling Blower","slug":"ad-beech-90-98-ka-33-cooling-blower","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44087,"registerId":"commonwealth-F2006B04281-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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\nBeechcraft 90 and 65-90 (King Air) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 90/98 KA-33 Cooling Blower 8/20","sectionType":"part","heading":"AD/BEECH 90/98 KA-33 Cooling Blower 8/2001","content":"# AD/BEECH 90/98 KA-33 Cooling Blower 8/2001\n\nApplicability: Beech Model C90A aeroplanes with the following configurations:","sortOrder":1},{"sectionNumber":"Configuration Aeroplane Serial Number","sectionType":"part","heading":"Configuration Aeroplane Serial Number","content":"## Configuration Aeroplane Serial Number\n\nCollins EFIS-84 System LJ-1306, LJ-1316, LJ-1318, LJ-1320\n\nthrough LJ-1334 inclusive and LJ-1340 through LJ-1592 inclusive","sortOrder":2},{"sectionNumber":"Beechcraft 90 and 65-90 (King Air) Serie","sectionType":"part","heading":"Beechcraft 90 and 65-90 (King Air) Series Aeroplanes","content":"## Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\nAD/BEECH 90/98 (Continued)\n\nThis Directive introduces measures intended to protect the blower motor circuit and reduce the possibility of emission of smoke or a burning odour into the cockpit or passenger compartment.\n\n![](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 29 June 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 11 July 2001.","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific electrical safety issue in a defined subset of Beechcraft C90A aircraft. There is no evidence of scope creep; it targets exactly the unsafe condition identified (cooling blower circuit protection) for exactly the aircraft configuration affected."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined applicability criterion (specific aircraft serial numbers)","Single, straightforward safety objective (prevent smoke/burning odour)","No nested exceptions or conditional logic","No cross-references to other legislation beyond the enabling regulation (CAR 1998)","Standardised AD format with clearly separated sections (Applicability, Requirement, Compliance)"],"plain_english_summary":"This CASA Airworthiness Directive legally requires owners/operators of Beechcraft Model C90A aeroplanes fitted with the Collins EFIS‑84 to correct defects in the KA‑33 cooling blower system to stop electrical faults that can cause smoke or burning smells in the cockpit or cabin. It targets specified serial‑numbered aircraft and is mandatory under subregulation 39.1(1) of the Civil Aviation Regulations 1998."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD narrowly targets Beech Model C90A aeroplanes with specified Collins EFIS‑84 serial numbers to address a blower motor circuit safety concern. The text shows a targeted corrective action consistent with that stated intent; no expansion or reduction of scope is indicated in the provided excerpt."},"complexity_factors":["Narrow, serial‑numbered applicability (Applicability section) — must identify affected airframes precisely","Technical nature of required measures (protect blower motor circuit) — likely needs qualified maintenance/parts","Regulatory basis and issuer discretion: issued under subreg 39.1(1) by CASA delegate (Background/issuance)","Compliance timing and detailed actions are referenced but not included in the excerpt (Requirement/Compliance sections) — implementers must obtain full AD text","Operational impacts: maintenance downtime and parts sourcing implied, creating direct costs for operators"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain Beechcraft Model C90A aeroplanes fitted with Collins EFIS-84 units (specific serial numbers listed) to implement measures protecting the KA‑33 cooling blower motor circuit. The stated purpose is to reduce the risk of smoke or a burning odour entering the cockpit or passenger compartment, and the AD was issued by the CASA delegate under subregulation 39.1(1). Affected operators must carry out the required inspections/modifications/replacements within the AD’s compliance timeframe, incurring maintenance time and parts/labour costs."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-98-ka-33-cooling-blower","history":"/api/acts/ad-beech-90-98-ka-33-cooling-blower/history","analysis":"/api/acts/ad-beech-90-98-ka-33-cooling-blower/analysis","conflicts":"/api/acts/ad-beech-90-98-ka-33-cooling-blower/conflicts","importantCases":"/api/acts/ad-beech-90-98-ka-33-cooling-blower/important-cases","documents":"/api/acts/ad-beech-90-98-ka-33-cooling-blower/documents"}}