{"id":"F2006B03786","name":"AD/BEECH 33/18 Amdt 1 - Landing Gear Shock Strut Piston","slug":"ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43382,"registerId":"commonwealth-F2006B03786-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 33/18 Amdt 1 - Landing Gear Shock Strut Piston","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 33 and 35-33 (Debonair/Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 33/18\n\nAmdt 1\n\n\nLanding Gear Shock Strut Piston 1/74\n\n \n\nApplicability: All model F33A with S/Nos. CE-436 to CE-463 except CE-439 and CE-462. Requirement:               Action in accordance with Beechcraft SI No. 0612-200.\n\nCompliance: Within 100 hours time in service after 31 January 1974 unless already accomplished.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument is labelled as an amendment (\"Amdt 1\"), indicating it modifies an earlier airworthiness directive. The amended text specifies the precise applicability (model F33A, S/N CE-436 to CE-463 with two exceptions), directs compliance with Beechcraft Service Instruction No. 0612-200, and sets the compliance deadline of 100 hours time in service after 31 January 1974 (unless already accomplished). The amended wording therefore defines who is covered, what external technical document must be followed, and the required compliance window."},"complexity_factors":["Narrow and clearly defined applicability by aircraft model and serial number range, with two serial numbers expressly excluded (Applicability).","Mandate references an external manufacturer document (Beechcraft SI No. 0612-200) rather than reproducing technical steps, requiring access to and reliance on that document (Requirement).","A fixed compliance window measured in flight hours from a historical calendar date, which requires operators to convert elapsed use into the 100-hour compliance trigger (Compliance).","Limited regulatory discretion in the AD text—compliance is mandatory unless already accomplished—reducing variation but increasing operational scheduling pressure (Compliance).","Potential practical implementation constraints: need for parts, qualified technicians, and maintenance facility availability, which are not addressed in the AD text (Requirement, Compliance)."],"plain_english_summary":"What this instrument does\n\n- This is an airworthiness directive (AD) issued by the Civil Aviation Safety Authority that requires specific work be done on the landing gear shock strut piston of certain Beechcraft F33A aeroplanes (title: \"Landing Gear Shock Strut Piston\"). (header)\n\nWho it applies to\n\n- It applies to all Beechcraft model F33A aeroplanes with serial numbers CE-436 to CE-463, except for serial numbers CE-439 and CE-462. (Applicability)\n\nWhat is required and how it must be done\n\n- The directive requires operators to carry out the action set out in Beechcraft Service Instruction No. 0612-200. The AD does not restate the detailed steps; it directs compliance with that manufacturer service instruction. (Requirement)\n\nWhen it must be done\n\n- The required action must be completed within 100 hours time in service after 31 January 1974, unless the work has already been completed. (Compliance)\n\nWho pays, who decides, and what changes in behaviour\n\n- Owners/operators of the affected aircraft are responsible for arranging and paying for the work required by the Beechcraft service instruction. (Requirement, Compliance)\n- CASA is the issuing authority and enforces the AD; the mandatory method of compliance is the manufacturer’s Service Instruction. (header, Requirement)\n- Practically, operators must schedule aircraft downtime, obtain any required parts or technical data from Beechcraft, and use suitably qualified maintenance personnel to carry out the instruction within the stated 100‑hour window. (Requirement, Compliance)\n\nCompliance burden, incentives and implementation risk\n\n- Compliance imposes direct costs on the aircraft owners/operators: labour, possible parts, and aircraft downtime while maintenance is performed. (Requirement, Compliance)\n- The AD refers to an external document (Beechcraft SI No. 0612-200). Access to that service instruction and to any parts it mandates is a precondition to compliance and is a potential implementation constraint. (Requirement)\n- The AD leaves little operational discretion beyond the exemption for work already done: affected aircraft must comply within the timeframe unless the action is already accomplished. Enforcement is by CASA under airworthiness directive powers. (Compliance)\n\nScope and trade-offs to note (mechanical facts, not value judgments)\n\n- The directive is narrowly targeted by model and serial number range, with two serial numbers excluded. That concentrates the requirement on a specific set of aircraft rather than all Beechcraft types. (Applicability)\n- Because the AD mandates following a manufacturer service instruction rather than prescribing a specific technical step in the AD text, the practical content of the requirement (what will be done to the piston) depends on the SI. Operators must therefore rely on and follow the manufacturer’s technical prescription. (Requirement)\n- The time window (100 hours time in service from a fixed calendar date) creates a scheduling constraint for operators and may cause short‑term clustering of maintenance demand for the affected fleet. (Compliance)\n\nSource citations\n\n- Applicability: \"All model F33A with S/Nos. CE-436 to CE-463 except CE-439 and CE-462.\" (Applicability)\n- Mandatory action: \"Action in accordance with Beechcraft SI No. 0612-200.\" (Requirement)\n- Timing: \"Within 100 hours time in service after 31 January 1974 unless already accomplished.\" (Compliance)\n\nSummary sentence\n\n- In short: this AD requires owners/operators of the specified F33A aeroplanes to carry out the work described in Beechcraft Service Instruction No. 0612-200 on the landing gear shock strut piston within 100 hours time in service from 31 January 1974 (unless already done); the owner/operator bears the compliance cost and must arrange qualified maintenance and any required parts."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused on a specific mechanical defect in a limited production run of aircraft. As an amendment to an existing AD, it maintains the original scope — correcting a landing gear issue in specific Beechcraft F33A serial numbers. There is no evidence of scope creep; it remains a precise, technical airworthiness requirement."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies on standard aviation terminology","Single, clear applicability criterion (specific model and serial number range)","No cross-references to other legislation or complex conditional logic","Simple compliance structure: one action, one deadline, one exception (already accomplished)","References external technical document (Beechcraft SI) rather than embedding complex technical requirements"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it like a compulsory recall notice, but for aircraft parts rather than cars.\n\n**What it does:** It requires owners and operators of specific Beechcraft aeroplanes (the F33A Debonair/Bonanza models with serial numbers CE-436 to CE-463, excluding two specific planes) to inspect or fix a problem with the **landing gear shock strut piston** — the hydraulic component that absorbs impact when the plane lands.\n\n**The specific action:** Operators must follow the instructions in **Beechcraft Service Instruction No. 0612-200** (a technical bulletin from the manufacturer). The exact nature of the fix isn't spelled out in the AD itself — you have to look up that separate document.\n\n**Who must comply:** Anyone operating the affected aircraft in Australia.\n\n**Deadline:** The work had to be done within **100 hours of flight time** after 31 January 1974, unless it was already fixed.\n\n**Why it matters:** Landing gear failures can be catastrophic. This AD addresses a known defect to prevent accidents during landing. The \"1/74\" in the title indicates this requirement originated in January 1974, and \"Amdt 1\" means this is the first amendment to that original directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston","history":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston/history","analysis":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston/analysis","conflicts":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston/conflicts","importantCases":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston/important-cases","documents":"/api/acts/ad-beech-33-18-amdt-1-landing-gear-shock-strut-piston/documents"}}