{"id":"F2006B06765","name":"AD/SA-TP/17 - Flap Jacks - Life Limitation","slug":"ad-sa-tp-17-flap-jacks-life-limitation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114598,"registerId":"commonwealth-F2006B06765-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SA-TP/17 - Flap Jacks - Life Limitation","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/17 Flap Jacks - Life Limitation NK\n\nApplicability: All models.\n\n \n\nDocument: Scottish Aviation TNS No. 2. 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, targeted safety directive focused specifically on flap jack life limitations for one aircraft type. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies on standard aviation terminology","Single, unambiguous applicability clause ('All models')","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple binary compliance requirement ('Forthwith') with no conditional exceptions or alternative methods of compliance","Single technical reference to external manufacturer document (TNS No. 2)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:** It imposes a \"life limitation\" on the \"flap jacks\" of all British Aerospace (Scottish Aviation) Twin Pioneer aircraft. A flap jack is a mechanical or hydraulic device that extends and retracts the flaps (the movable surfaces on the wings that help control lift during takeoff and landing). A \"life limitation\" means these parts must be retired from service after a certain number of flight hours, cycles, or calendar time — even if they appear to be working fine.\n\n**Who it affects:** Anyone who owns, operates, or maintains British Aerospace (Scottish Aviation) Twin Pioneer series aeroplanes (all models).\n\n**Why it matters:** This is a safety-critical measure. Flap jacks operate under high stress, and metal fatigue or wear can lead to sudden failure. Without this directive, an aging flap jack could fail during landing, potentially causing loss of control. The directive requires compliance \"forthwith\" — meaning immediately, without delay.\n\n**The technical source:** The directive references \"Scottish Aviation TNS No. 2\" — this is the manufacturer's technical notice specifying exactly what the life limit is and how to track it."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument, as written, establishes a life limitation for \"Flap Jacks\" on British Aerospace (Scottish Aviation) Twin Pioneer aeroplanes and requires immediate compliance with Scottish Aviation TNS No. 2. The AD text contains no indication that it widens or narrows scope beyond this stated purpose; it applies to all models and directs operators to the named TNS for technical detail (Applicability: All models; Document: Scottish Aviation TNS No. 2. Compliance: Forthwith.)."},"complexity_factors":["Short AD text that delegates all technical specification to an external document (Scottish Aviation TNS No. 2), requiring users to obtain that document to know the details.","Immediate compliance requirement (\"Forthwith\") increases operational and scheduling complexity.","Broad scope: explicitly applies to \"All models\" of the Twin Pioneer series, widening the population affected.","Lack of numeric or procedural detail within the AD itself (no life-limit figures or step-by-step instructions included in the AD text).","Regulatory enforcement depends on verification against an external document, creating administrative traceability requirements."],"plain_english_summary":"The Civil Aviation Safety Authority issues AD/SA-TP/17 requiring immediate compliance with Scottish Aviation TNS No. 2 to impose a mandatory life‑limitation regime for \"Flap Jacks\" on all British Aerospace (Scottish Aviation) Twin Pioneer models. It affects owners, operators, and maintenance organisations who must obtain and follow the TNS forthwith, creating direct costs, potential downtime, and administrative burden while enforcement focuses on adherence to that referenced technical note."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation","history":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation/history","analysis":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation/analysis","conflicts":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation/conflicts","importantCases":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation/important-cases","documents":"/api/acts/ad-sa-tp-17-flap-jacks-life-limitation/documents"}}