{"id":"F2006B03907","name":"AD/BEECH 36/50 - Flap Flex Shaft Assembly","slug":"ad-beech-36-50-flap-flex-shaft-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43516,"registerId":"commonwealth-F2006B03907-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)  \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 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\n![](image.001.png)\n\nBeechcraft 36 (Bonanza) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 36/50 Flap Flex Shaft Assembly ","sectionType":"part","heading":"AD/BEECH 36/50 Flap Flex Shaft Assembly 3/2002","content":"# AD/BEECH 36/50 Flap Flex Shaft Assembly 3/2002\n\nDM\n\nApplicability: Beechcraft Model 36, A36, A36TC and B36TC 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\nNote 2: Beech A36 aircraft, S/Nos E-3302 through E-3398, and Beech B36TC, S/Nos EA-652 through EA-677, may have had a discrepant flap flex shaft installed during production. These aircraft are identified in FAA AD 2001-23-10 as Group 1 aircraft. No Group 1 aircraft are currently on the Australian register. In the event such aircraft are imported into Australia, the requirements of this AD will be addressed during C of A issue\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":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD implements targeted safety actions for Beechcraft Model 36 series consistent with the referenced FAA AD (FAA AD 2001-23-10). It applies to the same component population defined by manufacture dates and does not expand the class of affected aircraft beyond those models and serials; Note 2 clarifies Group 1 aircraft identified by the FAA are not on the Australian register but would be addressed on import, not altering the AD's operative scope."},"complexity_factors":["Conditional workflow tied to maintenance records: different actions depending on whether components were replaced since 1 March 2000 (Requirement 1).","Date-range determination: replacement required only for flex shafts manufactured Jan 2000–Apr 2001, while pre-Jan 2000 and post-Apr 2001 assemblies are exempt (Requirement 2–3).","External technical reference: label inspection must follow Raytheon Service Bulletin 27-3478, adding reliance on another document for procedures (Requirement 2).","Short compliance windows: two inspections required within 25 flight hours and replacements mandated before further flight, creating tight scheduling/operational impact (Compliance).","Cross-reference to FAA AD 2001-23-10 and identification of a subset ('Group 1') aircraft that may have had discrepant parts installed in production, requiring separate handling on import (Note; Note 2).","Applicability covers multiple model variants and all serial numbers, so fleet-wide administrative checks of logs are required (Applicability).","Record-keeping and certification step: operators must make logbook entries certifying the review, imposing an administrative compliance burden (Requirement 1).","Practical replacement cost and logistics: replacing flex shafts before further flight may impose immediate parts and labour costs on operators (Requirement 3; Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of Beechcraft Model 36/A36/A36TC/B36TC aeroplanes to check maintenance records for recent replacements of left or right flap flex shafts or flap actuators, inspect label manufacture dates where replacements occurred, and replace any flex shafts manufactured between January 2000 and April 2001. Inspections must be done promptly (within 25 flight hours) and flagged replacements fitted before further flight to address a reported unsafe condition."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with focused, original scope. It addresses a specific manufacturing defect in a specific component for specific aircraft models. The note regarding Group 1 aircraft (production-line discrepancies) is ancillary information that does not expand the directive's operational scope."},"complexity_factors":["Short, single-purpose directive with clear sequential steps","Only 4 defined applicability criteria (aircraft models) and 3 specific compliance actions","Simple conditional logic (if/then structure) with clear date-based cutoffs","One cross-reference to FAA AD 2001-23-10 and one to Raytheon Service Bulletin 27-3478","Note regarding Group 1 aircraft adds minor complexity but explicitly states these are not currently relevant to Australian register","No nested exceptions or recursive definitions"],"plain_english_summary":"This CASA safety order requires owners/operators of Beechcraft Model 36, A36, A36TC and B36TC aeroplanes to check for potentially defective flap flex shafts (manufactured Jan–Apr 2000) that can fail and jam flaps. Within 25 flight hours, check records: if components were replaced since 1 Mar 2000 note it in the log; if replaced earlier inspect the label. Any shaft dated Jan 2000–Apr 2001 must be replaced before further flight to avoid loss of flap control."},"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-beech-36-50-flap-flex-shaft-assembly","history":"/api/acts/ad-beech-36-50-flap-flex-shaft-assembly/history","analysis":"/api/acts/ad-beech-36-50-flap-flex-shaft-assembly/analysis","conflicts":"/api/acts/ad-beech-36-50-flap-flex-shaft-assembly/conflicts","importantCases":"/api/acts/ad-beech-36-50-flap-flex-shaft-assembly/important-cases","documents":"/api/acts/ad-beech-36-50-flap-flex-shaft-assembly/documents"}}