{"id":"F2006B04902","name":"AD/CESSNA 120/2 - Rudder Bar Control Cable Horns","slug":"ad-cessna-120-2-rudder-bar-control-cable-horns","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44740,"registerId":"commonwealth-F2006B04902-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \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 CASR 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\nCessna 120 and 140 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CESSNA 120/2 Rudder Bar Control Cable","sectionType":"part","heading":"AD/CESSNA 120/2 Rudder Bar Control Cable Horns 5/2003","content":"# AD/CESSNA 120/2 Rudder Bar Control Cable Horns 5/2003\n\nApplicability: Model 120 and 140 aircraft, serial numbers 8001 through 12349.\n\nRequirement: Remove the forward part of the tunnel fairing on the cockpit floor and inspect the control cable horns on the rudder bar for signs of bending.\n\nBent control cable horns, which can be straightened without cracking, shall be reinforced by the installation of Cessna part number 0411303, or its equivalent.\n\nBefore further flight, replace cracked control cable horns with Cessna part number 0310168 (made of 0.080- inch steel).\n\nNote: FAA AD 47-43-04 and Cessna Service Letter No. 43 refer.\n\nCompliance: Within 100 hours time in service or 12 months after 15 May 2003, whichever occurs first, and thereafter at intervals not to exceed 100 hours time in service, until horns are replaced.\n\nThis Airworthiness Directive becomes effective on 15 May 2003.\n\nBackground: The rudder bar control cable horns have been found bent. This damage can be caused by excessive foot pressure during application of the parking brakes, which can result in reduced rudder travel.\n\n![](image.002.jpeg)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 4 April 2003\n\n![](image.001.png)","sortOrder":1}],"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":2,"scope_assessment":{"changed":false,"description":"The AD’s requirements match the stated unsafe condition (bent rudder bar control cable horns reducing rudder travel) and are limited to the identified aircraft serial range. It prescribes inspection, reinforcement or replacement, and inspection intervals; it does not broaden applicability or add requirements beyond addressing that specific safety issue."},"complexity_factors":["Narrow applicability limited to specific models and serial numbers (8001–12349).","Requires removal of the forward tunnel fairing to access and inspect parts (physical work and labour).","Different remedial paths: reinforcement for bent-but-uncracked horns vs mandatory replacement for cracked horns.","Recurring compliance obligation (every 100 hours) until horns are replaced.","Mandates specific replacement/reinforcement part numbers (0310168 and 0411303).","References external documents (FAA AD 47-43-04 and Cessna Service Letter No. 43) which may affect interpretation or methods."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 120 and 140 aeroplanes (serials 8001–12349) to remove the cockpit tunnel fairing, inspect the rudder bar control cable horns for bending, reinforce bent-but-uncracked horns with Cessna part 0411303 (or equivalent), and replace cracked horns with part 0310168 before further flight. Inspections must be repeated every 100 hours until replacement. CASA issued the directive to correct bent horns that can reduce rudder travel; operators pay for inspections, parts and labour and must comply within the stated time limits."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in defined aircraft models. It has not expanded beyond its original purpose of ensuring rudder control integrity."},"complexity_factors":["Single, specific mechanical issue addressed (rudder bar cable horns)","Only 2 defined part numbers referenced","Clear, linear compliance timeline with simple alternative triggers (100 hours OR 12 months)","No nested exceptions or conditional logic—straightforward if/then structure (bent = reinforce; cracked = replace)","Short document (under 300 words) with minimal cross-references (only 2 external documents noted)","Single applicability criterion (specific aircraft models and serial number range)"],"plain_english_summary":"This Airworthiness Directive orders operators and maintainers of specified Cessna 120/140 (SN 8001–12349) in Australia to inspect rudder bar control cable horns for bending and cracking, reinforce bendable horns with Cessna part 0411303, or replace cracked horns with steel part 0310168 before flight.\n\nInspections are due within 100 flight hours or 12 months from 15 May 2003, and every 100 flight hours thereafter until permanent replacement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns","history":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns/history","analysis":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns/analysis","conflicts":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns/conflicts","importantCases":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns/important-cases","documents":"/api/acts/ad-cessna-120-2-rudder-bar-control-cable-horns/documents"}}