{"id":"F2006B04901","name":"AD/CESSNA 120/13 - Upper Shoulder Harness Adjuster Spring","slug":"ad-cessna-120-13-upper-shoulder-harness-adjuster-spring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44734,"registerId":"commonwealth-F2006B04901-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 120/13 - Upper Shoulder Harness Adjuster Spring","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\n \n\n![](image.001.png)\n\n# AIRWORTHINESS 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\n\n \n\nCessna 120 and 140 Series Aeroplanes\n\n \n\n# AD/CESSNA 120/13 Upper Shoulder Harness Adjuster Spring\n\n\n13/2004\n\n \n\nApplicability: Models 120, 140, and 140A aircraft, with serial numbers listed in Cessna Single Engine Service Bulletin (SB) SEB86-8 Revision 1, dated 28 July 2003.\n\n \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 SEB86-8 Revision 1.\n\n \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 SEB86-8 Revision 1.\n\n \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\n \n\n2. Only incorporate Cessna Accessory Kits that have been identified, inspected, and modified in accordance with the Requirement document.\n\n \n\nNote: FAA AD 2004-19-01 Amdt 39-13795 refers.\n\n \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\n \n\n2. As of the effective date of this Directive.\n\n \n\nNote: Compliance with SB SEB86-8 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\n \n\nThis Airworthiness Directive becomes effective on 23 December 2004.\n\nCessna 120 and 140 Series Aeroplanes\n\n \n\nAD/CESSNA 120/13 (continued)\n\n \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\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 10 November 2004\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n![](image.001.png)  \n\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 1 December 2004.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive implements the manufacturer's corrective action for specific shoulder-harness adjusters and affected accessory kits identified in SB SEB86‑8 Rev 1. It confines measures to the listed serial numbers, the named part number (443030‑401) and modified kits; it does not broaden applicability beyond those items and allows compliance with the original Service Bulletin as a terminating action."},"complexity_factors":["Narrow applicability tied to serial numbers listed in Cessna SB SEB86‑8 Revision 1 (Applicability).","Specific part-number requirement: inspect upper shoulder harness adjuster P/N 443030‑401 (Requirement 1).","Detailed corrective action: cut and remove a small retainer spring, then stamp out the -401 identification if spring found (Requirement 1).","Record-keeping mandate if no spring is found: make an entry in the aircraft log book (Requirement 1).","Prohibition on fitting accessory kits unless they have been identified, inspected and modified per the Requirement document (Requirement 2).","Fixed compliance window: within 25 hours time in service or at next annual inspection after 23 December 2004 (Compliance 1).","Termination clause referencing compliance with the original issue of SB SEB86‑8 as a terminating action where applicable (Note).","Cross-reference to FAA AD 2004-19-01 increases inter-jurisdictional traceability and verification needs (Note)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 120, 140 and 140A aircraft listed in Cessna SB SEB86‑8 Rev 1 to inspect the upper shoulder harness adjuster (P/N 443030‑401) for a small retainer spring, remove and mark any adjuster found with a spring, and log compliance; only accessory kits inspected and modified per the Service Bulletin may be fitted. The stated aim is to prevent harness slippage; operators must complete the work within 25 flight hours or at the next annual inspection after 23 December 2004."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing a specific manufacturing defect in shoulder harness adjusters for specific Cessna aircraft models. There is no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, clearly defined applicability (three specific aircraft models)","Straightforward conditional logic (if spring found → remove it; if not found → log it)","Only one defined term of note (SB SEB86-8 Revision 1, a manufacturer service bulletin)","Minimal cross-referencing (single FAA AD reference and one terminating action note)","Clear, unambiguous compliance timeframe","Short document with single purpose and no nested exceptions"],"plain_english_summary":"This safety order requires owners/operators of certain Cessna 120/140/140A aircraft to inspect upper shoulder-harness adjusters (P/N 443030-401) for an unintended wire spring that can allow the harness to slip. If the spring is found it must be cut out and the part ID stamped out; if not, the check must be logged.\n\nThe check is due within 25 flight hours or by the next annual inspection after 23 Dec 2004. It prevents harness failure that could cause serious injury or death."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring","history":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring/history","analysis":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring/analysis","conflicts":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring/conflicts","importantCases":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring/important-cases","documents":"/api/acts/ad-cessna-120-13-upper-shoulder-harness-adjuster-spring/documents"}}