{"id":"F2006B03792","name":"AD/BEECH 33/25 - Tachometer Drive Cable Housing","slug":"ad-beech-33-25-tachometer-drive-cable-housing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43388,"registerId":"commonwealth-F2006B03792-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 33/25 - Tachometer Drive Cable Housing","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 33/25 Tachometer Drive Cable Housing 4/76\n\nApplicability: Models 35-B33, 35-C33, E33, F33 and G33 serials CD-388 thru CD-981 and CD-983 thru CD1304.\n\n \n\nRequirement: Action in accordance with Beechcraft SI 0784-241.\n\n \n\nNote: FAA AD 76-07-05 refers.\n\n \n\nCompliance: Within the next 100 hours time in service after 31 May 1976.\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1976 addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original narrow scope."},"complexity_factors":["Single, specific mechanical component addressed (tachometer drive cable housing)","Limited applicability — only 5 specific models with defined serial number ranges","Single compliance requirement: follow one referenced manufacturer service instruction","No defined terms section, no conditional logic, no nested exceptions","Straightforward compliance deadline (100 hours time in service after fixed date)","Total length: approximately 150 words"],"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 as a \"recall notice\" for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of specific **Beechcraft Debonair/Bonanza aeroplanes** (models 35-B33, 35-C33, E33, F33 and G33 with serial numbers CD-388 through CD-981 and CD-983 through CD-1304) to inspect or fix a problem with the **tachometer drive cable housing** — the protective casing around the cable that transmits engine speed readings to the cockpit gauge.\n\n**Who must act:** Anyone who owns or operates one of these specific aircraft models within Australia.\n\n**What they must do:** Follow the instructions in **Beechcraft Service Instruction SI 0784-241** (a technical bulletin from the manufacturer). The FAA (American aviation regulator) has issued a matching directive (AD 76-07-05), so this aligns with international safety standards.\n\n**When:** The work had to be completed within **100 hours of flying time** after 31 May 1976.\n\n**Why it matters:** A faulty tachometer drive cable housing could lead to inaccurate engine speed readings or complete failure of the gauge. Pilots rely on this instrument to manage engine power — without it, they risk engine damage, loss of power, or accidents due to mismanaged aircraft performance."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD’s scope is the set of specific Beechcraft models and serial numbers listed in the Applicability section and the mandated action in the Requirement (follow Beechcraft SI 0784-241) within the Compliance timeframe. The text contains no amendment or extension of that scope; it does not add aircraft outside the listed serial ranges or change the required action. (Applicability; Requirement; Compliance.)"},"complexity_factors":["Narrow applicability limited to a few model/serial ranges (Applicability).","Work details are not in the AD but are contained in an external Beechcraft Service Instruction (Requirement), requiring operators to obtain and interpret that document.","A fixed compliance window tied to a past date (100 hours after 31 May 1976) creates a deadline-based scheduling obligation (Compliance).","Cross-reference to FAA AD (Note) requires operators to consider an external regulatory document for context."],"plain_english_summary":"This AD requires owners/operators of specified Beechcraft Model 33 variants (serials CD‑388–CD‑981 and CD‑983–CD‑1304) to perform the tachometer drive cable housing work in Beechcraft Service Instruction 0784‑241 within 100 flight hours after 31 May 1976. It obliges affected operators to obtain and pay for the SI work, creating short‑term maintenance cost and scheduling impacts; it also cross‑references FAA AD 76‑07‑05 for related guidance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing","history":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing/history","analysis":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing/analysis","conflicts":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing/conflicts","importantCases":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing/important-cases","documents":"/api/acts/ad-beech-33-25-tachometer-drive-cable-housing/documents"}}