{"id":"F2006B04311","name":"AD/BEECH 99/1 - Elevator Spar - Inspection and Modification","slug":"ad-beech-99-1-elevator-spar-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44126,"registerId":"commonwealth-F2006B04311-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 99/1 - Elevator Spar - Inspection and Modification","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 99 Series Aeroplanes\n\n \n\nAD/BEECH 99/1 Elevator Spar - Inspection and Modification 2/94\n\nApplicability:  Serial No’s U-2, to U-10, U12 to U35, U37 to U60, U62 to U-65, U67, U68, U72 to U-87 and U-89.\n\n \n\nRequirement: Beechcraft Service Instruction 0190-133. Compliance:  Effective 3 February 1994.\n\nBackground:  Cracking of low time spars at the outboard hinge bracket has been experienced in operation and the manufacturer considers the rework detailed in the Beechcraft SI necessary.\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, targeted safety directive addressing a specific structural defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection and modification of elevator spars on affected Beechcraft 99 series aircraft."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability (serial numbers), requirement (single service instruction reference), compliance date, and background","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","No conditional logic or exceptions — applies straightforwardly to listed serial numbers","Single mandatory action with no alternatives or phased compliance options"],"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) for specific Beechcraft 99 series aircraft.\n\n**What it does:** It requires owners and operators of certain Beechcraft 99 aeroplanes to inspect and modify the elevator spar (a structural beam in the tail that helps control the plane's pitch). The work must follow Beechcraft Service Instruction 0190-133.\n\n**Who it affects:** Only specific aircraft with serial numbers listed: U-2 through U-10, U-12 through U-35, U-37 through U-60, U-62 through U-65, U-67, U-68, U-72 through U-87, and U-89.\n\n**Why it matters:** Cracks have been found in the elevator spar at the outboard hinge bracket on relatively new (low flight hour) aircraft. This is a critical structural component — if it fails, the pilot could lose control of the aircraft's pitch. The directive mandates fixes to prevent potential accidents.\n\n**When compliance was required:** From 3 February 1994 onwards."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD sets a discrete, targeted requirement for inspection and rework on the specific serial numbers listed and references a single manufacturer service instruction. There is no indication in the text that the AD expands or narrows scope beyond that stated applicability and requirement (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability limited to a specific list of serial numbers (Applicability).","Single technical requirement: follow Beechcraft Service Instruction 0190-133 for inspection and rework (Requirement).","Clear effective date for compliance (Compliance: Effective 3 February 1994).","Technical justification is summary-level: identifies cracking at the outboard hinge bracket but does not set out technical steps in the AD text itself (Background)."],"plain_english_summary":"This AD, issued by the Civil Aviation Safety Authority, requires owners/operators of specified Beechcraft 99 serial numbers to inspect and perform the rework on the elevator spar per Beechcraft Service Instruction 0190-133 (effective 3 Feb 1994). It targets observed cracking at the outboard hinge bracket; compliance and associated costs fall to the listed aircraft operators, and the service instruction prescribes the mandatory method of repair."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification","history":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification/history","analysis":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification/analysis","conflicts":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification/important-cases","documents":"/api/acts/ad-beech-99-1-elevator-spar-inspection-and-modification/documents"}}