{"id":"F2006B06762","name":"AD/SA-TP/14 - Protection Strips on Lift Struts","slug":"ad-sa-tp-14-protection-strips-on-lift-struts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114594,"registerId":"commonwealth-F2006B06762-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SA-TP/14 - Protection Strips on Lift Struts","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)  British Aerospace (Scottish Aviation) Twin Pioneer Series Aeroplanes\n\n \n\nAD/SA-TP/14 Protection Strips on Lift Struts NK\n\nApplicability: All models.\n\n \n\nDocument: Scottish Aviation Mod. No. C735. Compliance: Forthwith.\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\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 focused specifically on lift strut protection for one aircraft type. It represents the standard, narrow scope of individual ADs — addressing a specific safety defect with a specific remedy. There is no evidence of scope creep; the directive does exactly what its title suggests and no more."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies entirely on external technical reference (Scottish Aviation Mod. No. C735)","No conditional logic or exceptions — single universal applicability ('All models')","Single compliance requirement with unambiguous timing ('Forthwith')","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Technical content is entirely delegated to external manufacturer documentation"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft.\n\n**Which aircraft:** All models of the British Aerospace (Scottish Aviation) Twin Pioneer series aeroplanes. These are vintage twin-engine utility aircraft originally built in Scotland.\n\n**What it requires:** Aircraft owners/operators must install \"protection strips on lift struts\" — protective coverings or reinforcements on the structural struts that help support the wings. This modification is detailed in Scottish Aviation Modification No. C735.\n\n**When it must be done:** \"Forthwith\" — meaning immediately, without delay. This suggests an urgent safety concern.\n\n**Why it matters:** Lift struts are critical structural components. Without protection strips, these struts may be vulnerable to damage (from corrosion, abrasion, or fatigue) that could compromise the aircraft's structural integrity and safety. The \"NK\" designation likely indicates this is a new directive (as opposed to a revision).\n\n**Who must comply:** Anyone operating or maintaining a Twin Pioneer aircraft in Australia must ensure this modification is carried out before further flight."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The provided text sets a clear, limited scope: require implementation of Scottish Aviation Mod. No. C735 on all Twin Pioneer models with immediate effect (Applicability: All models; Document: Scottish Aviation Mod. No. C735; Compliance: Forthwith). There is no material in the text indicating a change from a prior scope or intent; the directive itself is confined to mandating that modification and does not expand or narrow scope beyond that instruction."},"complexity_factors":["Single, narrow requirement referencing one modification document (Document: Scottish Aviation Mod. No. C735)","Applies to all models but contains no exemptions or conditional language (Applicability: All models)","Immediate compliance required with no phased schedule or implementation options (Compliance: Forthwith)","No procedural, enforcement, or technical detail in the directive itself (directive delegates technical detail to Mod. No. C735)"],"plain_english_summary":"This airworthiness directive requires owners/operators and maintenance organisations to implement Scottish Aviation Mod. No. C735 — adding protection strips on lift struts — on all British Aerospace (Scottish Aviation) Twin Pioneer models. Compliance is required forthwith, creating an immediate obligation for operators and their maintenance suppliers; the directive defers technical details, costs and rationale to the referenced modification document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts","history":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts/history","analysis":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts/analysis","conflicts":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts/conflicts","importantCases":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts/important-cases","documents":"/api/acts/ad-sa-tp-14-protection-strips-on-lift-struts/documents"}}