{"id":"F2006B04193","name":"AD/BEECH 77/3 - Aileron Torque Tube Bearings","slug":"ad-beech-77-3-aileron-torque-tube-bearings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43947,"registerId":"commonwealth-F2006B04193-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 77/3 - Aileron Torque Tube Bearings","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\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 77 (Skipper) Series Aeroplanes\n\n \n\nAD/BEECH 77/3 Aileron Torque Tube Bearings 4/80\n\nApplicability: All model 77 with S/Nos. WA-1 to WA-78, WA-80 to WA-86 and WA-88. Requirement:               Action in accordance with Beechcraft SI No. 1119.\n\nCompliance: Within 25 hours’ time in service after 17 March 1980.\n\n \n\nBackground: It is possible for the aileron torque tube to bind in the flap spool during flight.\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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound airworthiness directive with a specific technical scope (aileron torque tube bearings on specific serial numbers). It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 defined elements: applicability (specific serial numbers), requirement (reference to external document), and compliance deadline","No nested conditional logic or exceptions","Single cross-reference to external technical document (Beechcraft SI No. 1119)","Straightforward command structure: 'applies to X, do Y by Z date'","No interpretation section or defined terms"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific Beechcraft 77 'Skipper' aeroplanes.\n\n**What it does:**\n- Requires owners/operators of certain Beechcraft 77 aircraft to inspect or fix a problem with the **aileron torque tube bearings** (components that help control the plane's roll)\n- The specific action must follow Beechcraft Service Instruction No. 1119\n\n**Who it affects:**\n- Owners and operators of Beechcraft Model 77 aircraft with serial numbers WA-1 to WA-78, WA-80 to WA-86, and WA-88\n\n**Why it matters:**\n- **Safety risk:** The aileron torque tube can bind (get stuck) in the flap spool during flight\n- This could cause loss of roll control, potentially leading to loss of aircraft control\n- Compliance was required within 25 flight hours after 17 March 1980\n\n**Key point:** This is a retrospective safety mandate addressing a known mechanical defect in specific aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope remains focused on the specified Beechcraft 77 serial numbers and requires compliance with the manufacturer’s Service Instruction No. 1119 within the stated 25-hour time window. There is no indication in the supplied text that the applicability or substantive requirements were broadened or narrowed from the original statement."},"complexity_factors":["Narrow applicability limited to specific serial numbers (Applicability).","Technical remedy is not included in the AD itself but referenced (Beechcraft SI No. 1119) (Requirement).","Short mandatory compliance window (25 hours TIS after 17 March 1980) increases scheduling pressure (Compliance).","Operational and logistical dependencies: need to obtain SI No. 1119, obtain parts, and schedule maintenance.","Safety rationale is succinct and specific (possibility of torque tube binding) but lacks technical detail in the AD itself (Background)."],"plain_english_summary":"This airworthiness directive mandates that owners/operators of certain Beechcraft Model 77 (Skipper) serial-numbered aeroplanes comply with Beechcraft Service Instruction No. 1119 within 25 hours time-in-service after 17 March 1980 to inspect/repair aileron torque tube/flap spool issues. It affects the listed serial-numbered aircraft, imposes a short, mandatory compliance window, shifts the technical remedy to the manufacturer’s instruction, and leaves owners/operators responsible for arranging and funding the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings","history":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings/history","analysis":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings/analysis","conflicts":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings/conflicts","importantCases":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings/important-cases","documents":"/api/acts/ad-beech-77-3-aileron-torque-tube-bearings/documents"}}