{"id":"F2006B08563","name":"AD/CIRRUS/1 - Elevator Torque Tube and Rudder Hinge","slug":"ad-cirrus-1-elevator-torque-tube-and-rudder-hinge","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51392,"registerId":"commonwealth-F2006B08563-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 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\nCirrus Design Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CIRRUS/1 Elevator Torque Tube and Rud","sectionType":"part","heading":"AD/CIRRUS/1 Elevator Torque Tube and Rudder Hinge 2/2002","content":"# AD/CIRRUS/1 Elevator Torque Tube and Rudder Hinge 2/2002\n\nApplicability: Model SR20 with serial numbers 1134 through 1159. Model SR22 with serial numbers 0003 through 0119.\n\nRequirement: Inspect in accordance with the Accomplishment Instructions section of Cirrus Design Service Bulletin SB 20-55-06 or SB 22-55-03, as applicable; issued 27 November 2001.\n\nIf an under strength rivet is found, before further flight, replace it with a new rivet, part number MS20470AD4, or FAA-approved equivalent part number.\n\nPart number MS20470A4 rivets are not to be installed.\n\nNote: FAA AD 2001-25-03 Amdt 39-12556 refers.\n\nCompliance: Within 10 hours time in service after 21 February 2002, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 21 February 2002.\n\nBackground: The FAA received notification from the manufacturer that under strength rivets were mixed in production supplies. Under strength rivets, if installed, could result in failure of the control surface.\n\n![Signature of Steven John Swift Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nSteven John Swift\n\nDelegate of the Civil Aviation Safety Authority 11 January 2002\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific manufacturing defect. The scope remains tightly focused on the identified unsafe condition (under-strength rivets in specific aircraft) and has not expanded beyond this original safety purpose."},"complexity_factors":["Single, specific mechanical issue (rivet strength)","Only 2 aircraft models affected with clearly defined serial number ranges","One primary action required (inspect and replace if necessary)","Clear compliance deadline (10 hours time in service)","Simple conditional logic (if weak rivet found → replace before flight)","Only 1 cross-reference to related FAA directive","No nested definitions or interpretation sections"],"plain_english_summary":"This safety order requires owners, operators, and maintenance personnel of specified Cirrus SR20 (S/N 1134–1159) and SR22 (S/N 0003–0119) aeroplanes to inspect the elevator torque tube and rudder hinge for under‑strength rivets and replace any found before further flight, and bans use of rivet part MS20470A4. It responds to accidentally mixed weak rivets that could cause control‑surface failure. The order is effective 21 February 2002; inspections must occur within 10 flight hours thereafter."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies only to the listed SR20 and SR22 serial numbers and requires inspection and replacement where under‑strength rivets exist. The text contains no indication that the scope was altered from its stated purpose of correcting mixed-production under‑strength rivets identified by the manufacturer/FAA."},"complexity_factors":["Very narrow applicability (specific models and serial number ranges) reduces population to inspect","Action references external documents (Cirrus Service Bulletins SB 20-55-06 / SB 22-55-03), creating a dependency on those instructions","Short compliance window (within 10 hours time in service) increases urgency and logistic burden","Prescriptive parts requirement: mandates replacement with part MS20470AD4 and prohibits MS20470A4, requiring parts availability and verification","Mandates action before further flight if defect found, limiting operator flexibility","Regulatory basis cited (CASA delegate under subregulation 39.1(1) of CAR 1998) and cross-reference to FAA AD 2001-25-03 add interjurisdictional linkage"],"plain_english_summary":"Requires operators of Cirrus SR20 (serials 1134–1159) and SR22 (serials 0003–0119) to inspect the elevator torque tube and rudder hinge per the applicable Cirrus Service Bulletin and, if under‑strength rivets are found, replace them with MS20470AD4 rivets before further flight; MS20470A4 rivets are prohibited. CASA cites manufacturer reports of mixed production rivets that could lead to control‑surface failure. Owners/operators pay for inspection and any replacements; CASA enforces a 10‑hour time‑in‑service compliance window."},"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-cirrus-1-elevator-torque-tube-and-rudder-hinge","history":"/api/acts/ad-cirrus-1-elevator-torque-tube-and-rudder-hinge/history","analysis":"/api/acts/ad-cirrus-1-elevator-torque-tube-and-rudder-hinge/analysis","conflicts":"/api/acts/ad-cirrus-1-elevator-torque-tube-and-rudder-hinge/conflicts","importantCases":"/api/acts/ad-cirrus-1-elevator-torque-tube-and-rudder-hinge/important-cases","documents":"/api/acts/ad-cirrus-1-elevator-torque-tube-and-rudder-hinge/documents"}}