{"id":"F2006B03845","name":"AD/BEECH 35/49 - Stabiliser Attach Fitting","slug":"ad-beech-35-49-stabiliser-attach-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43454,"registerId":"commonwealth-F2006B03845-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/49 - Stabiliser Attach Fitting","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 35 (Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 35/49 Stabiliser Attach Fitting 9/76\n\nApplicability: All model 35, 35R, A35 and B35 with S/Nos. D-1 to D2680. Except those with stabiliser attach fitting P/N 35-650044-1 or 35-405130-3 installed.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0729-130.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1975 and thereafter at intervals not exceeding 1000 hours time in service.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive, as written, sets a targeted mandatory action for aircraft in serial-number range D-1 to D2680 unless they have one of two specified stabiliser attach fitting part numbers. The text contains no internal indication that its applicatory scope has been altered from that stated: it identifies which aircraft are covered, which are excluded, the required source of technical action (Beechcraft SI No. 0729-130), and the time schedule for initial and recurrent compliance (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow technical scope limited to specific models and serial-number range (Applicability)","Exemption conditioned on possession of two specific part numbers (Applicability)","Mandatory reference to an external document (Beechcraft SI No. 0729-130) that contains the technical steps (Requirement)","Time‑based compliance schedule with an immediate short window and recurring intervals (Compliance)","Operational and record-keeping burden on owners/operators to demonstrate compliance or exemption (Applicability; Compliance)"],"plain_english_summary":"This directive makes Beechcraft Service Instruction No. 0729‑130 mandatory for Beechcraft Model 35 family aeroplanes S/N D‑1 to D2680 (unless fitted with stabiliser attach fitting P/N 35‑650044‑1 or 35‑405130‑3). Affected owners/operators must have the stabiliser attach fitting inspected or modified by certificated maintenance within 100 hours from 31 Oct 1975 and then every 1,000 hours thereafter. Owners bear the cost and must keep records to demonstrate compliance or exemption."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical defect in a defined aircraft population. It has not expanded beyond its original purpose of ensuring stabiliser attach fitting integrity."},"complexity_factors":["Very short document (under 150 words)","Only 4 defined elements: applicability (4 models + serial range), 2 exempt part numbers, 1 referenced external document (Beechcraft SI), and 1 compliance deadline","No nested conditional logic — simple 'applies to X except Y' structure","Single cross-reference to manufacturer service instruction","Clear, unambiguous compliance timeline (100 hours initial, 1000 hours recurring)"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Beechcraft 35 (Bonanza) aeroplanes** to inspect or repair the **stabiliser attach fitting** (the metal bracket that connects the tail stabiliser to the aircraft fuselage).\n\n**Who it affects:**\n- Owners and operators of Beechcraft models 35, 35R, A35 and B35 with serial numbers D-1 through D-2680\n- **Exception:** Aircraft that already have replacement parts installed (specific part numbers 35-650044-1 or 35-405130-3) are exempt\n\n**What must be done:**\n- Follow the instructions in **Beechcraft Service Instruction No. 0729-130** (a technical manual from the manufacturer)\n\n**When it must be done:**\n- First inspection/repair within **100 hours of flying time** after 31 October 1975\n- Then repeated **every 1,000 hours of flying time** thereafter\n\n**Why it matters:**\nStabiliser attach fittings are critical structural components. If they fail, the pilot could lose control of the aircraft. This AD was issued to prevent accidents caused by fatigue or corrosion in these fittings on early-model Bonanzas."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting","history":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting/history","analysis":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting/analysis","conflicts":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting/conflicts","importantCases":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting/important-cases","documents":"/api/acts/ad-beech-35-49-stabiliser-attach-fitting/documents"}}