{"id":"F2006B05364","name":"AD/P68/38 Amdt 2 - Stabiliser Drive Horn","slug":"ad-p68-38-amdt-2-stabiliser-drive-horn","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45923,"registerId":"commonwealth-F2006B05364-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/38 Amdt 2 - Stabiliser Drive Horn","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/P68/38\n\nAmdt 2\n\nApplicability: Model P68 Series.\n\n# Stabiliser Drive Horn 9/92\n\n \n\nRequirement: 1. Action in accordance with Partenavia SB P68-87 Revision 1.\n\n \n\n2. Check the reference lines and the bolt torque in accordance with Partenavia SB P68-87 Revision 1.\n\n \n\nNote: RAI AD 92-077 refers.\n\n \n\nCompliance: 1. Unless already accomplished; within 50 hours time in service after 20 August 1992, and thereafter at intervals not to exceed 200 hours time in service.\n\n \n\n2. Recheck the reference lines and the bolt torque within 25 hours time in service after the accomplishment of Requirement 1, or, within 25 hours time in service after 20 August 1992 if Requirement 1 is already accomplished.\n\n \n\nThe compliance of the previous issue of this Directive was:\n\n \n\nWithin 200 hours time in service after 21 May 1992, and thereafter at intervals not to exceed 200 hours time in service. This Amendment is effective from 20 August 1992.\n\n \n\nBackground: An accident has occurred and has been attributed to lack of pitch control caused by slippage of the stabiliser drive horn on the stabiliser torque tube.\n\n \n\nAmendment 1 was raised to align this Directive with the relevant Country of Origin AD requirements.\n\n \n\nAmendment 2 is issued to align this Directive with a revision of the Requirement Document which requires a more specific bolt torque and a new safety screw of a different material.\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":3,"scope_assessment":{"changed":false,"description":"This AD remains tightly focused on its original purpose: preventing stabiliser drive horn slippage. Amendment 2 is a technical refinement (specific torque values, material specification) rather than scope expansion. The core safety objective has not changed since the original 1992 issue."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 2 defined requirements with clear compliance timeframes","Simple conditional logic (\"unless already accomplished\")","Single cross-reference to manufacturer service bulletin (SB P68-87 Rev 1)","Historical context provided but does not create additional obligations","No nested exceptions or layered definitions"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and maintenance of the stabiliser drive horn on Partenavia P68 aeroplanes to prevent pitch-control loss after an incident where the part slipped on its shaft. It affects owners/operators of those aircraft in Australia and requires initial, recurring and follow-up checks to ensure correct reference alignment and bolt torque.\n\nAmendment 2 tightens requirements with manufacturer‑specified bolt torque and a revised safety screw material to improve reliability."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 narrows the technical requirements compared with the previous issue by specifying a more precise bolt torque and mandating a different-material safety screw (Background, Amendment 2). It also accelerates initial compliance and adds an interim recheck: initial work 'within 50 hours... after 20 August 1992' (Compliance 1) and a recheck 'within 25 hours... after the accomplishment of Requirement 1' (Compliance 2), whereas the previous issue allowed initial compliance 'within 200 hours... after 21 May 1992'."},"complexity_factors":["Limited applicability: only Model P68 Series (Applicability).","Normative reliance on an external document: actions and inspection methods are performed 'in accordance with Partenavia SB P68-87 Revision 1' (Requirement 1 & 2).","Technical specificity introduced by the amendment: 'a more specific bolt torque and a new safety screw of a different material' (Background, Amendment 2).","Multiple, staggered compliance intervals to track: initial action within 50 hours, recurring inspections every 200 hours, and a recheck within 25 hours after Requirement 1 (Compliance).","Record-keeping and parts replacement burden implied: fitting a different-material safety screw and enforcing torque requires parts, tools, and maintenance labour (Requirement & Background).","Alignment with foreign ADs adds regulatory coordination considerations: Amendment 1 aligned with Country of Origin AD requirements (Background, Amendment 1)."],"plain_english_summary":"This airworthiness directive applies to Partenavia P68 series aeroplanes and requires work and repeated inspections according to Partenavia Service Bulletin P68-87 Revision 1: set a specific bolt torque, fit a revised safety screw, and check reference lines and torque. Aircraft owners/operators must carry out the initial and recurring checks within the stated flight-hour windows. The directive was issued after an accident attributed to the stabiliser drive horn slipping on the torque tube, so it changes maintenance actions and inspection timing to reduce that mechanical risk."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn","history":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn/history","analysis":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn/analysis","conflicts":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn/conflicts","importantCases":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn/important-cases","documents":"/api/acts/ad-p68-38-amdt-2-stabiliser-drive-horn/documents"}}