{"id":"F2006B04973","name":"AD/CESSNA 170/45 - Rudder Trim/Nose Gear Steering Bungee","slug":"ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44860,"registerId":"commonwealth-F2006B04973-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 170/45 - Rudder Trim/Nose Gear Steering Bungee","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 170, 172, F172, FR172 and 175 Series Aeroplanes\n\nAD/CESSNA 170/45 Rudder Trim/Nose Gear Steering Bungee 9/81\n\nApplicability: All model 172 RG with S/Nos 172 RG 0001 to 172 RG 0769.\n\nRequirement: Replace P/N 2467003-1 rudder trim/nose gear steering bungee with P/N 2467003-6 rudder trim/nose gear steering bungee.\n\nNote: FAA AD 81-14-06 Amdt 39-4158 and Cessna Single Engine Service Letter SE 80-99 Rev 1 refer to this subject.\n\nCompliance: (a) Before further flight for aircraft experiencing elevator control movement limitation as described in AD/CESSNA 170/44.\n\n    (b) For aeroplanes with over 150 hours total time in service: within 100 hours time in service after 29 July 1981.\n\n    (c) For aeroplanes with less than 150 hours after 29 July 1981: prior to the accumulation of 250 hours total time in service.\n\nBackground: The rudder trim/nose gear steering bungee is replaced with a later design to prevent failure of the jack screw shaft.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating a part replacement to prevent control system failures."},"complexity_factors":["Single, specific mechanical part replacement with clear part numbers","Limited applicability: only one model variant (172 RG) with defined serial number range","Simple three-tier compliance structure based on flight hours and existing symptoms","No defined terms section, no cross-references to other legislation beyond a related AD and FAA reference","Background explanation is one sentence","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety fix ordered by Australia's aviation safety regulator (CASA) for specific Cessna aeroplanes.\n\n**What it does:**\nOrders owners and operators of certain Cessna 172 RG model aircraft (serial numbers 172 RG 0001 through 172 RG 0769) to replace a specific part — the \"rudder trim/nose gear steering bungee\" — with an improved version.\n\n**Why it matters:**\nThe old part (part number 2467003-1) can fail, causing the jack screw shaft to break. This could limit elevator control movement, making the aircraft difficult or dangerous to fly. The new part (2467003-6) fixes this design flaw.\n\n**Who must comply:**\n- **Immediately:** Any aircraft already showing the control problem described in a related directive (AD/CESSNA 170/44)\n- **Within 100 flight hours:** Aircraft with more than 150 total flight hours (counted from 29 July 1981)\n- **Before 250 total flight hours:** Newer aircraft with less than 150 hours (must be done before they reach 250 hours total)\n\n**In short:** If you own one of these specific Cessna planes, you must swap out this bungee cord/mechanical part by a specific deadline to keep flying legally and safely."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope aligns with the AD's stated aim: a targeted parts replacement for a defined set of 172RG serial numbers to address a specific mechanical failure mode. There is no textual indication the AD expands beyond that original, specific corrective purpose (see Applicability, Requirement, Background)."},"complexity_factors":["Narrow applicability: specific model and serial-number range (Applicability).","Single, discrete technical action: replace one part with a specified P/N (Requirement).","Tiered compliance deadlines tied to operational condition and hours (Compliance (a)–(c)).","Immediate action for a diagnosed control limitation increases urgency and operational impact (Compliance (a)).","Cross-references to FAA AD and Cessna service letter create external documentation dependencies (Note).","Safety rationale is focused and technical: to prevent jack-screw shaft failure (Background)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain Cessna 172RG aircraft (serials 172 RG 0001–0769) to replace the rudder trim/nose‑gear steering bungee (P/N 2467003-1) with a later-design part (P/N 2467003-6). Compliance timing depends on whether the aircraft shows compromised elevator control or on accumulated flight hours. According to the AD, the replacement is to prevent jack‑screw shaft failure. Aircraft operators bear the cost and responsibility for arranging and completing the part change to meet the stated deadlines."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee","history":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee/history","analysis":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee/analysis","conflicts":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee/conflicts","importantCases":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee/important-cases","documents":"/api/acts/ad-cessna-170-45-rudder-trim-nose-gear-steering-bungee/documents"}}