{"id":"F2006B06768","name":"AD/SA-TP/2 - Hydraulic Valve - Strengthened Gland","slug":"ad-sa-tp-2-hydraulic-valve-strengthened-gland","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114602,"registerId":"commonwealth-F2006B06768-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SA-TP/2 - Hydraulic Valve - Strengthened Gland","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/2 Hydraulic Valve - Strengthened Gland NK\n\nApplicability: All models.\n\n \n\nDocument: Scottish Aviation Mod. No. C285. Compliance: Before 750 landings.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1917},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope: mandating a specific hardware modification for a single aircraft type to address a hydraulic valve safety issue. There is no indication of scope expansion into unrelated systems, operational procedures, or other aircraft types."},"complexity_factors":["Single, unambiguous requirement with no exceptions or nested conditions","No defined terms or interpretation section","No cross-references to other legislative provisions beyond the enabling regulations","Clear compliance metric (750 landings threshold)","Extremely brief instrument (under 100 words of substantive text)"],"plain_english_summary":"**What this does:** This is an Airworthiness Directive—a mandatory safety order from the Civil Aviation Safety Authority (CASA) that legally requires aircraft owners to fix a specific safety issue.\n\n**Who it affects:** Anyone operating any model of the British Aerospace (Scottish Aviation) Twin Pioneer series aircraft.\n\n**What must be done:** The hydraulic valve must be fitted with a strengthened gland (a reinforced seal) to prevent leaks or failures. The work must follow Scottish Aviation Modification No. C285.\n\n**When:** This modification must be completed before the aircraft reaches 750 landings.\n\n**Why it matters:** Hydraulic system failures can lead to loss of flight controls or braking capability, creating serious safety risks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland","history":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland/history","analysis":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland/analysis","conflicts":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland/conflicts","importantCases":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland/important-cases","documents":"/api/acts/ad-sa-tp-2-hydraulic-valve-strengthened-gland/documents"}}