{"id":"F2006B05611","name":"AD/PA-28/54 - Spin Prohibition Placard","slug":"ad-pa-28-54-spin-prohibition-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135232,"registerId":"commonwealth-F2006B05611-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/54 - Spin Prohibition Placard","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)  Piper PA-28 Series Aeroplanes\n\n \n\nAD/PA-28/54 Spin Prohibition Placard 2/75\n\nApplicability: Model PA28-180 with S/Nos. 28-7305001 to 28-7505079. Document:  Piper SB No. 436.\n\nCompliance: Within 25 hours time in service after 20 January 1975.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose safety directive. It has not expanded beyond its original intent of mandating a spin prohibition placard for the specified aircraft series."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section","No cross-references to other legislation beyond basic citation","Simple conditional logic: if you own this specific aircraft model with these serial numbers, you must install this placard","Single compliance requirement with clear deadline","No exceptions or nested conditions"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** Requires owners/operators of certain Piper PA-28-180 aeroplanes to install a placard (a warning sign) that prohibits spinning manoeuvres.\n\n**Who it affects:** Owners and operators of Piper PA-28-180 aircraft with serial numbers between 28-7305001 and 28-7505079.\n\n**Why it matters:** Spinning is a dangerous flight manoeuvre where an aircraft descends in a corkscrew pattern. This AD was issued because the manufacturer (Piper) identified that these specific aircraft should not be intentionally spun — likely due to safety concerns about recovery characteristics or structural integrity. The placard serves as a permanent visual warning to pilots not to attempt spins.\n\n**Key details:**\n- **Compliance deadline:** Within 25 hours of flight time after 20 January 1975\n- **Source document:** Piper Service Bulletin No. 436\n- **Legal basis:** Civil Aviation Regulations 1988, Part 39 (Airworthiness Directives)\n\nAirworthiness Directives are legally binding. Non-compliance means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD, as written, prescribes a single mechanical change for a defined set of aircraft (installing a spin prohibition placard) and gives a fixed compliance window. There is no language in the instrument indicating expansion or narrowing of that scope relative to the instrument’s stated action; therefore no change of scope is evident from the text provided (Applicability; Document; Compliance)."},"complexity_factors":["Very narrow applicability (single model and defined serial number range) (Applicability).","Short, explicit compliance deadline with a clear hours‑in‑service metric (Compliance).","External reference to Piper SB No. 436 for placard wording and installation details increases practical steps required.","Lack of placard text or installation details in the AD itself requires operators to obtain and follow a separate document (Document).","Historic compliance date (20 January 1975) creates a retroactive compliance window in the text but does not add procedural complexity to the required action (Compliance)."],"plain_english_summary":"This AD requires owners/operators of specified Piper PA-28-180s (S/N 28-7305001 to 28-7505079) to install a Spin Prohibition placard per Piper SB No. 436 within 25 hours TIS after 20 Jan 1975. It affects owners/operators and maintenance providers, imposes a small one‑off compliance cost and administrative task, and is enforced through the airworthiness directive mechanism (Civil Aviation Safety Authority)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-54-spin-prohibition-placard","history":"/api/acts/ad-pa-28-54-spin-prohibition-placard/history","analysis":"/api/acts/ad-pa-28-54-spin-prohibition-placard/analysis","conflicts":"/api/acts/ad-pa-28-54-spin-prohibition-placard/conflicts","importantCases":"/api/acts/ad-pa-28-54-spin-prohibition-placard/important-cases","documents":"/api/acts/ad-pa-28-54-spin-prohibition-placard/documents"}}