{"id":"F2006B08222","name":"AD/CESSNA 336/14 - Upper Shoulder Harness Adjuster Spring","slug":"ad-cessna-336-14-upper-shoulder-harness-adjuster-spring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115462,"registerId":"commonwealth-F2006B08222-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 336/14 - Upper Shoulder Harness Adjuster Spring","content":"![](image.001.png)\n\n![](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 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\n![](image.001.png)  \n\nCessna 336 Series Aeroplanes\n\nAD/CESSNA 336/14 Upper Shoulder Harness\n\nAdjuster Spring\n\n  \n13/2004\n\nApplicability: Model 336 aircraft, with serial numbers listed in Cessna Multi-Engine Service Bulletin (SB) MEB86-22 Revision 1, dated 28 July 2003.\n\nRequirement: 1. Inspect only the upper shoulder harness adjuster (part number 443030-401) for the presence of a retainer spring, in accordance with SB MEB86-22 Revision 1.\n\nIf a retainer spring is found during the above inspection of the upper shoulder harness adjuster (part number 443030-401), before further flight, remove the spring by cutting each side, and stamp out the -401 identification number; in accordance with SB MEB86-22 Revision 1.\n\nIf a retainer spring is not found during the above inspection of the upper shoulder harness adjuster (part number 443030-401), before further flight, make an entry in the aircraft log book showing compliance with this Directive.\n\n2. Only incorporate Cessna Accessory Kits that have been identified, inspected, and modified in accordance with the Requirement document.\n\nNote: FAA AD 2004-19-01 Amdt 39-13795 refers.\n\nCompliance: 1. Within the next 25 hours time in service or at the next annual inspection after 23 December 2004, whichever occurs first.\n\n2. As of the effective date of this Directive.\n\nNote: Compliance with SB MEB86-22 original issue, dated 21 November 1986, constitutes terminating action for the requirements of this Directive, if shoulder harness adjuster part number 443030-401 was used.\n\nThis Airworthiness Directive becomes effective on 23 December 2004.\n\nCessna 336 Series Aeroplanes\n\nAD/CESSNA 336/14 (continued)\n\nBackground: The manufacturer determined that some of the shoulder harness belt adjusters included in the affected shoulder harness accessory kits may have had a small wire spring inadvertently installed on the belt friction pin. The actions required by this Directive are intended to prevent slippage of the pilot/co-pilot shoulder harness, which could result in failure of the shoulder harness to maintain proper belt length adjustment and tension.\n\n![](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 12 November 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 1 December 2004.","sortOrder":0}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: addressing a specific manufacturing defect in a specific part on a specific aircraft model. There is no evidence of scope creep."},"complexity_factors":["Single, specific aircraft model and part number targeted","Straightforward binary inspection (spring present/absent) with clear action for each outcome","Only one cross-reference to FAA AD 2004-19-01 (informational note only)","Minimal defined terms (only standard aviation terminology like 'time in service' and 'annual inspection')","Simple compliance timeline with clear deadline","No nested exceptions or conditional logic beyond the spring present/absent check"],"plain_english_summary":"This safety order applies to certain Cessna Model 336 aircraft and addresses a dangerous factory-introduced wire spring in the upper shoulder-harness adjuster that can let the harness slip in a crash. Owners/operators must inspect the adjuster, remove the rogue spring (and part marking) if present, or log the inspection if clear, and use only inspected replacement kits.\n\nCompliance is required within 25 flight hours or by the next annual inspection after 23 December 2004."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive's scope aligns with its stated safety objective in the Background: inspect/remove an inadvertent retainer spring on a specified adjuster and restrict uninspected accessory kits. It applies only to the serial-numbered aircraft referenced in the cited service bulletin and does not expand beyond the manufacturer’s corrective action as described."},"complexity_factors":["Targeted to a specific aircraft model and serial numbers listed in Cessna SB MEB86-22 Rev 1 (limited scope reduces complexity).","Requires inspection of a particular part number (443030-401) and a simple corrective action (cutting spring and stamping part), which is mechanically straightforward.","Compliance deadline is short (within 25 flight hours or at next annual inspection), requiring timely scheduling by operators.","Relies on an external service bulletin (SB MEB86-22 Rev 1) for procedural detail, so access to and correct interpretation of that SB is necessary.","Includes an administrative compliance route (logbook entry) when no spring is found, adding minimal record-keeping burden.","Prohibits incorporation of accessory kits unless they have been identified/inspected/modified per the Requirement, imposing supply-chain checks for maintenance and parts procurement."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Cessna 336 aircraft to inspect the upper shoulder harness adjuster (part 443030-401). If a small retainer spring is found, it must be cut off and the part identification stamped out; if not, a logbook entry must be made. It also bans fitting Cessna accessory kits unless they have been identified, inspected and modified per the cited service bulletin. The action aims to prevent shoulder-harness slippage that could affect restraint tension and belt length."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring","history":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring/history","analysis":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring/analysis","conflicts":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring/conflicts","importantCases":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring/important-cases","documents":"/api/acts/ad-cessna-336-14-upper-shoulder-harness-adjuster-spring/documents"}}