{"id":"F2006B07562","name":"AD/VAT/29 - Elevator Trim Adjustment Segment - Inspection","slug":"ad-vat-29-elevator-trim-adjustment-segment-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50156,"registerId":"commonwealth-F2006B07562-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/29 - Elevator Trim Adjustment Segment - Inspection","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)  Victa and A.E.S.L. Airtourer Series Aeroplanes\n\n \n\nAD/VAT/29 Elevator Trim Adjustment Segment - Inspection 6/67\n\nApplicability: Victa Airtourer 115.\n\n \n\nRequirement: Inspect the elevator trim adjustment segment P/N 52528/2 on the trim lever assembly for wear or damage to the locking teeth.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service until modified in accordance with Victa SB No. 61.\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\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is narrowly confined in the text: it applies to Victa Airtourer 115 aircraft and to a single part (elevator trim adjustment segment P/N 52528/2). It imposes a recurring inspection requirement (≤100 hours TIS) that remains in force until the aircraft is modified in accordance with Victa SB No. 61. There is no indication in the supplied text that the scope was altered from the directive’s original stated measures."},"complexity_factors":["Narrow applicability: applies only to Victa Airtourer 115 (low scope breadth).","Single, clearly stated action: one inspection target (P/N 52528/2) and one defect criterion (wear or damage to the locking teeth).","Simple recurring schedule: inspection interval capped at 100 hours TIS (straightforward timing rule).","Dependence on an external document (Victa SB No. 61) to terminate the requirement introduces minor added complexity tied to availability and content of that service bulletin.","No detailed inspection methodology, remediation thresholds, or enforcement mechanism specified in the text, leaving operational interpretation to maintainers and the referenced SB."],"plain_english_summary":"What this instrument does (mechanically)\n\n- It imposes a mandatory inspection requirement for a specific part on a specific airplane model. (See \"Applicability\" and \"Requirement\".)\n- Applicability: Victa Airtourer 115 aircraft. (\"Applicability\".)\n- Requirement: Inspect the elevator trim adjustment segment, part number 52528/2, on the trim lever assembly for wear or damage to the locking teeth. (\"Requirement\".)\n- Compliance timing: Carry out the inspection at intervals not exceeding 100 hours time-in-service, and continue these inspections until the aircraft is modified in accordance with Victa Service Bulletin No. 61. (\"Compliance\".)\n\nStated purpose and how the rule works\n\n- The rule addresses wear or damage to the locking teeth of the elevator trim adjustment segment (the text directs an inspection for wear or damage; see \"Requirement\").\n- Mechanically, the rule creates a recurring inspection duty (every ≤100 hours TIS) targeted at one component (P/N 52528/2) on one aircraft type, and it ends that recurring duty if the aircraft is modified per Victa SB No. 61 (see \"Compliance\").\n\nWho pays, who decides, and what changes in behaviour\n\n- Who pays: Operators or owners of Victa Airtourer 115 aircraft will incur the direct costs of performing the inspections and any resulting repairs or parts replacement. (Cost implication follows from the inspection and repair requirement in \"Requirement\" and the recurring schedule in \"Compliance\".)\n- Who decides: Maintenance personnel/approved engineers must perform the inspections and decide whether wear or damage is present; the operator must arrange inspections at the prescribed intervals. The modification that terminates the inspection requirement must be done in accordance with Victa SB No. 61 (\"Compliance\").\n- Behavioural change: Operators must add a recurring maintenance task (inspection every ≤100 hours) for the specified part until they implement the specified modification. Some operators may choose to implement the SB No. 61 modification promptly to stop recurring inspections; others may continue periodic inspections instead.\n\nCosts, incentives, trade-offs, and implementation considerations\n\n- Recurring cost vs one-off modification: The rule creates an ongoing inspection cost (every ≤100 hours) until a modification is carried out. This sets up an explicit trade-off for operators between continuing periodic inspections and undertaking the modification described in Victa SB No. 61.\n- Concentration of burden and benefit: The requirement applies narrowly to owners/operators of Victa Airtourer 115s and to maintenance providers who service them (\"Applicability\"); the potential safety benefit (reduced risk from worn locking teeth) accrues specifically to those aircraft and their users. The text does not quantify costs or benefits.\n- Compliance burden: The only prescription in the text is the inspection action, the inspection interval, and the terminating condition (modification per SB No. 61). The AD does not specify inspection technique, remediation thresholds, or penalties in this text; those details will be worked out by the operator’s maintenance procedures and the referenced service bulletin.\n- Reliance on an external document: The compliance end-point depends on Victa SB No. 61. That places practical importance on the content and availability of that service bulletin for operators and maintainers (\"Compliance\").\n- Administrative discretion: The directive is prescriptive (inspect at stated intervals until modified). There is limited operational discretion aside from timing the modification and how operators implement the inspection and any repairs.\n\nSection citations (source lines)\n\n- Applicability: \"Victa Airtourer 115.\" (\"Applicability\".)\n- Requirement: \"Inspect the elevator trim adjustment segment P/N 52528/2 on the trim lever assembly for wear or damage to the locking teeth.\" (\"Requirement\".)\n- Compliance: \"At intervals not exceeding 100 hours time in service until modified in accordance with Victa SB No. 61.\" (\"Compliance\".)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of ensuring elevator trim system integrity in Victa Airtourer 115 aircraft."},"complexity_factors":["Extremely short document (under 150 words)","Only 1 defined term implicitly referenced (P/N = Part Number)","No cross-references to other legislation or regulations","Simple conditional structure: single requirement with single compliance condition","No nested exceptions or complex logical operators","Single applicability criterion (one specific aircraft model)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety instruction issued by the Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** It requires owners or operators of **Victa Airtourer 115** aeroplanes to regularly inspect a specific part called the \"elevator trim adjustment segment\" (part number 52528/2). This component is part of the trim lever assembly — the mechanism pilots use to adjust the aircraft's pitch (nose-up or nose-down attitude) without constant pressure on the control stick.\n\n**The problem:** The locking teeth on this segment can wear out or become damaged. If this happens, the elevator trim could slip or fail to hold its position, potentially causing loss of control.\n\n**What must be done:**\n- **Inspect** the trim adjustment segment for wear or damage to its locking teeth\n- **How often:** Every 100 hours of flight time (\"time in service\")\n- **Until when:** Until the aircraft is modified according to **Victa Service Bulletin No. 61** (a manufacturer's official fix)\n\n**Who it affects:** Anyone who owns, operates, or maintains a Victa Airtourer 115 aircraft.\n\n**Why it matters:** This is a **flight safety issue**. A failed elevator trim can make the aircraft difficult or dangerous to fly. The directive ensures potential problems are caught before they cause accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection","history":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection/history","analysis":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection/analysis","conflicts":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection/conflicts","importantCases":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection/important-cases","documents":"/api/acts/ad-vat-29-elevator-trim-adjustment-segment-inspection/documents"}}