{"id":"F2006B03986","name":"AD/BEECH 55/39 - Automatic Pilot Servo Bridle Clamp Bolts","slug":"ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43595,"registerId":"commonwealth-F2006B03986-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 55/39 - Automatic Pilot Servo Bridle Clamp Bolts","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 55, 58 and 95-55 (Baron) Series Aeroplanes\n\n \n\nAD/BEECH 55/39 Automatic Pilot Servo Bridle Clamp Bolts 1/74\n\nApplicability: Models 95-55, 95-A55, 95-B55, 95-B55A, Serial TC1 to TC1573, 95-C55, 95-C55A,\n\nD55, D55A, E55, E55A Serial TE-1 to TE-919 and TC-350 equipped with Edo-Aire Mitchell AK292 Automatic pilot.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0601-180. Compliance:  Within 100 hours’ time in service after 31 January 1974.\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, single-issue airworthiness directive from 1974 addressing a specific mechanical defect in autopilot hardware. It has not expanded beyond its original purpose of ensuring safe operation of the specified bolt clamps."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (aircraft models/serial numbers and specific autopilot equipment)","Single requirement referencing an external technical document (Beechcraft SI No. 0601-180)","Simple compliance deadline (100 hours time in service after fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward scope: one specific mechanical component on specific aircraft types"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) requiring specific aircraft owners to fix a mechanical problem.\n\n**What it does:**\nOrders owners of certain **Beechcraft Baron aeroplanes** (models 95-55, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, D55, D55A, E55, and E55A) to inspect or replace bolts on their **automatic pilot servo bridle clamps**. These bolts are part of the autopilot system that helps keep the plane flying straight and level.\n\n**Who it affects:**\n- Owners and operators of specific Beechcraft Baron aircraft with serial numbers up to TC-1573 and TE-919\n- Only applies to planes fitted with the **Edo-Aire Mitchell AK292 autopilot system**\n\n**What must be done:**\nFollow the instructions in **Beechcraft Service Information Notice No. 0601-180** (a technical bulletin from the manufacturer). This must be completed within **100 hours of flying time** after 31 January 1974.\n\n**Why it matters:**\nFaulty bolts in the autopilot system could cause the autopilot to fail or malfunction during flight, potentially leading to loss of control. This directive ensures a known mechanical defect is fixed before it causes an accident."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument's scope is defined within the document: it applies to the listed models/serials equipped with the specified autopilot (Applicability), requires action per Beechcraft SI No. 0601-180 (Requirement), and sets a 100‑hour compliance window after 31 January 1974 (Compliance). The text provides no indication that the AD's scope has been altered from any earlier or original version."},"complexity_factors":["Narrow, model‑and‑serial specific applicability (Applicability).","Requirement delegates technical detail to an external manufacturer service instruction (Beechcraft SI No. 0601-180) rather than including steps in the AD (Requirement).","Fixed, short compliance window measured in flight hours after a calendar date (Compliance).","Technical nature requires competent maintenance providers to interpret and apply the referenced SI.","Enforcement depends on documenting compliance with an external document, which can introduce administrative tasks for operators and inspectors."],"plain_english_summary":"This airworthiness directive (AD) applies to specified Beechcraft Model 55/58/95-55 series aeroplanes that are fitted with an Edo‑Aire Mitchell AK292 automatic pilot. (See \"Applicability\".)\n\nWhat it requires\n\n- Aircraft owners/operators must carry out the work described in Beechcraft Service Instruction No. 0601-180. (See \"Requirement\".)\n- That work must be completed within 100 hours time‑in‑service after 31 January 1974. (See \"Compliance\".)\n\nWho it affects\n\n- The owners and operators of the listed Beechcraft models and serial numbers that have the AK292 automatic pilot installed. The AD is limited to those serial ranges and to aircraft equipped with that specific autopilot (see \"Applicability\").\n\nHow it works mechanically\n\n- The AD itself does not set out detailed maintenance steps; it makes compliance with Beechcraft SI No. 0601-180 mandatory for the identified aircraft. The service instruction contains the technical actions to be performed; the AD prescribes the schedule for completing those actions.\n\nStated purpose and implementation trade‑offs\n\n- The AD requires a manufacturer service instruction to be followed by a defined deadline. The directive text does not include an explicit statement of the technical defect or hazard; it only specifies the mandatory action and timing (Requirement; Compliance). Because the SI is external to the AD, owners must obtain and follow that document to meet the AD.\n\nWho pays, who decides, and likely behaviour changes\n\n- Owners/operators pay the direct costs (labour, parts, downtime) of carrying out the service instruction. (Requirement; Compliance.)\n- The regulator (Civil Aviation Safety Authority via the AD schedule) decides which aircraft are affected and the compliance deadline. (Document heading: Schedule of Airworthiness Directives; Applicability.)\n- Likely responses by owners/operators include scheduling the specified maintenance within the 100‑hour window, sourcing the service instruction and any required parts, and using maintenance providers who will follow SI No. 0601-180.\n\nImplementation risks and compliance burden\n\n- The AD references an external technical document (Beechcraft SI No. 0601-180). That creates a dependency on availability and clarity of that SI for correct execution. (Requirement.)\n- The compliance window (100 flight hours after a fixed calendar date) creates a timing constraint that may require short‑term scheduling and aircraft downtime. (Compliance.)\n\nNet effect summary\n\n- Mechanically, the AD turns the Beechcraft service instruction into a mandatory maintenance requirement for the specifically listed aircraft and autopilot installation, enforceable within the stated 100‑hour time window. (Applicability; Requirement; Compliance.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts","history":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts/history","analysis":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts/analysis","conflicts":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts/conflicts","importantCases":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts/important-cases","documents":"/api/acts/ad-beech-55-39-automatic-pilot-servo-bridle-clamp-bolts/documents"}}