{"id":"F2006B05367","name":"AD/P68/40 - Stabilator Torque Tube Attachment Shelves, Flap and Aileron Hinge Shelves","slug":"ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45932,"registerId":"commonwealth-F2006B05367-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/40 - Stabilator Torque Tube Attachment Shelves, Flap and Aileron Hinge Shelves","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)  Partenavia P68 Series Aeroplanes\n\n \n\n# AD/P68/40 Stabilator Torque Tube Attachment Shelves,\n\nFlap and Aileron Hinge Shelves\n\nApplicability: All Model P68 aircraft.\n\n \n\nRequirement: Action in accordance with Partenavia Mandatory Service Bulletin 91.\n\n \n\nNote: RAI AD 94-026 refers.\n\n# 5/94\n\n \n\nCompliance: At the next 100 hour inspection after 28 April 1994, and thereafter at intervals not to exceed one calendar year.\n\n \n\nBackground: A case of corroded shelves was reported to the manufacturer.\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":{"summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"No information about any amendment or change is provided; the instrument is presented as an original directive."},"complexity_factors":["References an external manufacturer service bulletin that must be obtained separately","Applies to a specific, niche aircraft type","Compliance timing is tied to both an inspection interval and a calendar-based recurring requirement"],"plain_english_summary":"This is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It mandates inspection of certain structural components , the stabilator torque tube attachment shelves and the flap and aileron hinge shelves , on all Partenavia P68 model aircraft registered in Australia.\n\nThe AD was prompted by a report of corroded shelves received by the manufacturer. Left undetected, corrosion in these areas could weaken critical attachment points and potentially lead to loss of control. To manage this risk, the directive requires that the inspections be carried out in strict accordance with Partenavia Mandatory Service Bulletin 91. The first inspection must be done at the next 100-hour inspection that falls after 28 April 1994. After that, owners and maintainers must repeat the inspection at intervals not exceeding one calendar year.\n\nIf you operate or maintain a Partenavia P68, this AD is directly relevant to you. It is a continuing airworthiness requirement: you need to obtain and follow the manufacturer’s service bulletin, document the findings, and address any corrosion in line with the bulletin’s instructions. Failing to comply may mean the aircraft is not airworthy, which can affect insurance and legal operations. The directive itself does not specify rectification steps beyond the bulletin, so the bulletin is essential for practical compliance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies to all Model P68 aircraft and requires action per the manufacturer’s Mandatory Service Bulletin 91, with inspections scheduled at the next 100‑hour check after 28 April 1994 and thereafter at intervals not exceeding one calendar year (Applicability; Requirement; Compliance). The source text gives no indication that the AD’s scope has been broadened or narrowed relative to an earlier stated intent, so no change in scope is indicated in the supplied document."},"complexity_factors":["Narrow applicability limited to all Partenavia P68 aircraft (Applicability) reduces breadth of affected population.","Dependence on an external document (Partenavia Mandatory Service Bulletin 91) for the detailed work increases practical complexity for implementers (Requirement).","Specified timing ties compliance to the 100‑hour inspection cycle and sets an annual maximum interval, requiring operators to track both flight hours and calendar time (Compliance).","Cross‑reference to another AD (RAI AD 94‑026) adds a layer of interlinked regulatory material to consult (Note).","Unspecified corrective actions in the AD text—actual repair scope and parts required are determined by the service bulletin and maintenance judgement—creates implementation variability (Requirement; Background)."],"plain_english_summary":"This AD makes Partenavia Mandatory Service Bulletin 91 compulsory for all Partenavia P68 aircraft: operators must inspect per the bulletin at the next 100‑hour check after 28 April 1994 and then at least annually, to address reported corrosion on stabilator torque‑tube attachments and flap/aileron hinge shelves. CASA enforces the requirement; owners/operators pay for inspections and any repairs. The AD cross‑references RAI AD 94‑026 and requires compliance “in accordance with” the service bulletin."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific corrosion risk in a specific aircraft type. It has not expanded beyond its original purpose of mandating inspections for structural integrity."},"complexity_factors":["Very short document (under 200 words)","Only 1 defined term implicitly referenced (the Service Bulletin)","No cross-references to other legislation sections","Simple conditional logic: single compliance trigger (time-based) with straightforward recurring interval","Single applicability criterion (all Model P68 aircraft)","No nested exceptions or conditional exemptions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nIt requires owners and operators of **Partenavia P68 series aircraft** to inspect specific structural parts — the \"stabilator torque tube attachment shelves\" and \"flap and aileron hinge shelves\" — for corrosion (rust/deterioration).\n\n**Who must act:**\nAnyone who owns or operates a Model P68 aircraft.\n\n**What they must do:**\nFollow the instructions in **Partenavia Mandatory Service Bulletin 91** — a technical document from the aircraft manufacturer detailing how to check these parts.\n\n**When:**\n- First inspection: at the next routine 100-hour maintenance check after 28 April 1994\n- Then repeated every year (calendar year intervals)\n\n**Why it matters:**\nCorrosion in these structural shelves could weaken the aircraft's control surfaces (the parts that steer the plane). If these fail in flight, the pilot could lose control. The directive was triggered after a report of corroded shelves was sent to the manufacturer.\n\n**Note:** The directive references a related US Federal Aviation Administration directive (RAI AD 94-026), showing this was a coordinated international safety response."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves","history":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves/history","analysis":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves/analysis","conflicts":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves/conflicts","importantCases":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves/important-cases","documents":"/api/acts/ad-p68-40-stabilator-torque-tube-attachment-shelves-flap-and-aileron-hinge-shelves/documents"}}