{"id":"F2006B03868","name":"AD/BEECH 35/71 - Flap Flex Shaft Assembly","slug":"ad-beech-35-71-flap-flex-shaft-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43477,"registerId":"commonwealth-F2006B03868-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)![](image.001.png)AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)For 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\nBeechcraft 35 (Bonanza) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 35/71 Flap Flex Shaft Assembly ","sectionType":"part","heading":"AD/BEECH 35/71 Flap Flex Shaft Assembly 3/2002","content":"# AD/BEECH 35/71 Flap Flex Shaft Assembly 3/2002\n\nDM\n\nApplicability: Beechcraft Model 35, 35R, A35, B35, C35, D35, E35, F35, G35, H35, J35, L35, M35, N35, P35, S35, V35, V35A and V35B aircraft, all serial numbers\n\nRequirement: 1. Review the aircraft records to determine if either the LH or the RH flap flex shaft, or the flap actuator has been replaced since 1 March 2000. If these components have not been replaced since 1 March 2000, no further action is required. Make an appropriate certification in the aircraft log book.\n\n    2. If either a LH or RH flap flex shaft, or a flap actuator has been replaced since 1 March 2000, inspect the identification label for manufacture date of the flap flex shaft assemblies in accordance with Raytheon Service Bulletin 27-3478. Flex shafts manufactured before January 2000 and after April 2001 do not require replacement.\n\n    3. Replace flap flex shafts that were manufactured between January 2000 through April 2001\n\nNote: FAA AD 2001-23-10 refers.\n\nCompliance: 1. Within 25 flight hours from the effective date of this Airworthiness Directive.\n\n    2. Within 25 flight hours from the effective date of this Airworthiness Directive.\n\n    3. Before further flight.\n\nThis Airworthiness Directive becomes effective on 30 January 2002","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"},"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 a defined aircraft series. It has not expanded beyond its original purpose of ensuring airworthiness of flap flex shaft assemblies."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined applicability criteria (aircraft models)","Simple conditional logic: IF replaced since March 2000 → THEN inspect → IF manufactured Jan-Apr 2001 → THEN replace","No cross-references to other legislation (only a note referencing related FAA directive)","Clear, sequential compliance requirements with specific timeframes","Single purpose: identify and replace specific defective parts"],"plain_english_summary":"This CASA safety order targets Beechcraft Model 35 Bonanza variants and requires owners/operators to check maintenance logs for flap flex shaft replacements after 1 March 2000. If assemblies were fitted with manufacturing dates from Jan 2000 to Apr 2001, they must be replaced before next flight. \n\nIt matters because affected shafts can cause flap malfunction during critical phases like landing, so the order grounds aircraft with susceptible parts until corrected."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD is narrowly targeted at a specific potential defect in flap flex shaft assemblies identified by manufacture date. It confines action to affected parts and sets short compliance times. There is no indication in this text that the AD has grown beyond that original safety-focused purpose."},"complexity_factors":["Simple three-step requirement structure (Requirement 1–3)","Single conditional branch based on whether parts were replaced since 1 March 2000","Single date-range condition for unsafe parts (manufacture between Jan 2000 and Apr 2001)","Two short compliance timeframes (25 flight hours; before further flight)","Cross-references to an external service bulletin (Raytheon SB 27-3478) and FAA AD 2001-23-10","Applicability covers many model variants but all serial numbers — simple scope","No defined-terms section or nested exceptions"],"plain_english_summary":"**What this AD does (mechanically)\n\n- Applies to: Beechcraft Model 35/Bonanza variants listed (all serial numbers).\n- Triggers a simple three-step process (Requirement 1–3):\n  - Requirement 1: Review aircraft records to see whether either left-hand (LH) or right-hand (RH) flap flex shaft, or the flap actuator, has been replaced since 1 March 2000. If none of those parts have been replaced since that date, no further action is required — make a logbook entry to record the review. (Requirement 1)\n  - Requirement 2: If any of those parts were replaced since 1 March 2000, inspect the identification label on the flap flex shaft assemblies to find the manufacture date, following Raytheon Service Bulletin 27-3478. Flex shafts manufactured before January 2000 and after April 2001 are acceptable and do not need replacing. (Requirement 2)\n  - Requirement 3: If a flap flex shaft was manufactured between January 2000 and April 2001 (inclusive), replace it before further flight. (Requirement 3)\n- Timing (Compliance):\n  - The records review (Req. 1) and the label inspection (Req. 2) must each be completed within 25 flight hours of the AD taking effect. (Compliance 1 & 2)\n  - Any required replacement (Req. 3) must be completed before the next flight of the aircraft. (Compliance 3)\n- References: the AD refers to Raytheon Service Bulletin 27-3478 for the inspection procedure and to FAA AD 2001-23-10.\n\nWhy the AD exists (official claim) and how that matters in practice\n\n- The AD is issued to correct an identified \"unsafe condition\" in the flap flex shaft assemblies (this is the AD’s stated purpose). The AD's mechanism is to identify parts potentially affected by manufacture date and ensure parts manufactured in a specific window (Jan 2000–Apr 2001) are replaced.\n\nPractical effects, who pays, and who decides\n\n- Who pays: aircraft owners/operators bear the cost of any inspections and of replacing affected flex shafts. Maintenance providers perform the work; parts and labour are the operator’s expense.\n- Who decides: CASA (the delegate signing the AD) prescribes the mandatory actions. The operator decides how and where to have the inspection and replacement carried out, subject to the AD’s timing requirements.\n- Behaviour change required: operators must (a) check maintenance records quickly, (b) inspect identification labels when relevant, and (c) remove from service and replace any flex shafts made in the Jan 2000–Apr 2001 window before further flight.\n\nImplementation details, incentives, and trade-offs\n\n- Implementation risk: locating legible manufacture-date labels on installed flex shafts can be difficult; access may require partial disassembly or specialist maintenance. Suppliers’ stock of replacement flex shafts may be limited, which could increase aircraft downtime.\n- Compliance burden: modest for aircraft that have never had the part replaced since 1 March 2000 (one logbook entry). It may be higher for aircraft with replacements in that period if parts must be removed and replaced immediately.\n- Incentives and costs: the immediate cost is borne by the relatively small set of affected operators (concentrated cost). The benefit is removal of parts that the regulator believes pose an unsafe condition (concentrated safety benefit for users of those aircraft). There is an opportunity cost in maintenance time and parts procurement; operators may prioritise this AD ahead of routine maintenance due to the before-further-flight replacement requirement.\n- Substitution effects: operators may seek alternative compliant parts or accelerated deliveries; some may temporarily ground aircraft until replacements are fitted.\n\nNotes on source claims and limits\n\n- The AD cites correction of an unsafe condition as its legal basis; it does not in the text quantify the safety risk or give failure rates. The AD directs operators to a manufacturer service bulletin for the inspection procedure, so correct compliance requires following that external document. The AD also cross-references an FAA AD, which may provide related background or justification but is not a substitute for the Australian AD’s mandatory requirements (see Requirements and Compliance sections)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly","history":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly/history","analysis":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly/analysis","conflicts":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly/conflicts","importantCases":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly/important-cases","documents":"/api/acts/ad-beech-35-71-flap-flex-shaft-assembly/documents"}}