{"id":"F2006B05353","name":"AD/P68/26 - Stabilator Travel Stop - Modification","slug":"ad-p68-26-stabilator-travel-stop-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45885,"registerId":"commonwealth-F2006B05353-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/26 - Stabilator Travel Stop - 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)  Partenavia P68 Series Aeroplanes\n\n \n\nAD/P68/26 Stabilator Travel Stop - Modification 12/84\n\nApplicability: All model P68 series with S/Nos referred to in requirement document. Requirement: Partenavia P68 S.B. No. 63 Rev. 1.\n\nNote: RAI AD 84-129/P68-31 Refers.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1984 or at the next scheduled inspection for Maintenance Release issue after 31 December 1984 whichever is the later.\n\n \n\nBackground: The manufacturer has received reports of bending of the stabilator travel stop screws.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1984 addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating a stabilator modification."},"complexity_factors":["Single, specific technical requirement (one service bulletin reference)","No defined terms section — uses plain aviation terminology","Simple conditional compliance deadline (whichever is later of two dates)","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Extremely short document (approximately 150 words of substantive content)","Single applicability criterion (aircraft model and serial numbers)"],"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:**\nRequires owners and operators of **Partenavia P68 series aircraft** to modify the **stabilator travel stop** (a mechanical limit that controls how far the aircraft's horizontal tail surface can move). The modification is specified in the manufacturer's Service Bulletin No. 63, Revision 1.\n\n**Why it matters:**\nThe manufacturer received reports that the screws on the stabilator travel stop were **bending**. This is a flight safety issue — if the travel stop fails, the pilot could lose proper control of the aircraft's pitch (nose up/down movement).\n\n**Who must comply:**\nAll Partenavia P68 aircraft with serial numbers listed in the referenced service bulletin.\n\n**When to comply:**\nWithin 100 hours of flight time after 31 December 1984, or at the next scheduled inspection for issuing a Maintenance Release (a certificate that says the aircraft is safe to fly) — whichever comes later.\n\n**Key point:** This is a **retrospective safety fix** — it applies to aircraft already in service and mandates a specific physical modification to prevent potential accidents."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope, as expressed in the text, is confined to requiring a stabilator travel stop modification on the P68 aircraft identified by serial number in the requirement document. The stated purpose is to address reports of bending stabilator travel stop screws (Background). The AD implements that remedial action by mandating compliance with a manufacturer service bulletin (Requirement) within a specified timeframe (Compliance). The text contains no indication that the scope departs from this stated intent or expands beyond those aircraft and the specified modification."},"complexity_factors":["Narrow, specific applicability (only P68 models with S/Ns listed in the requirement document) (Applicability)","Requirement delegates technical detail to an external manufacturer service bulletin (Partenavia P68 S.B. No. 63 Rev. 1) (Requirement)","Conditional compliance timing (either within 100 hours TIS after 31/12/1984 or at next scheduled inspection for Maintenance Release, whichever is later) (Compliance)","Cross-reference to another AD (RAI AD 84-129/P68-31), requiring operators to check related directives (Note)"],"plain_english_summary":"This AD requires a stabilator travel‑stop modification on specified Partenavia P68 aircraft per Partenavia P68 S.B. No. 63 Rev. 1, to address reports of bending travel‑stop screws.  \n\nIt applies only to the serial numbers listed in the requirement and must be done within 100 hours TIS after 31 Dec 1984 or at the next scheduled Maintenance Release inspection if later."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-26-stabilator-travel-stop-modification","history":"/api/acts/ad-p68-26-stabilator-travel-stop-modification/history","analysis":"/api/acts/ad-p68-26-stabilator-travel-stop-modification/analysis","conflicts":"/api/acts/ad-p68-26-stabilator-travel-stop-modification/conflicts","importantCases":"/api/acts/ad-p68-26-stabilator-travel-stop-modification/important-cases","documents":"/api/acts/ad-p68-26-stabilator-travel-stop-modification/documents"}}