{"id":"F2006B05747","name":"AD/PA-31/42 Amdt 2 - Airspeed Placard - Installation","slug":"ad-pa-31-42-amdt-2-airspeed-placard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135580,"registerId":"commonwealth-F2006B05747-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/42 Amdt 2 - Airspeed Placard - Installation","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-31 Series Aeroplanes\n\n \n\nAD/PA-31/42\n\nAmdt 2\n\n\nAirspeed Placard - Installation 5/77\n\n \n\nApplicability: 1. All models PA-31P with S/Nos. 31P-1 to 31P-7630007.\n\n \n\n2. All models PA-31-325 with S/Nos. 31-7400990 to 31-7612110.\n\n \n\nDocument: 1. Piper SB No. 478; or\n\n \n\n2. Piper SB No. 544.\n\n \n\nCompliance: 1. Within 100 hours time in service after 31 May 1976.\n\n \n\n2. Within 100 hours time in service after 31 May 1977.\n\n \n\nNote 1: Placard must contain airspeed limitation data specified in knots.\n\n \n\nNote 2: Compliance with the preceding issue of this directive satisfies compliance with this issue of the directive.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":1957},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Amendment 2 maintains identical substantive scope to previous issues. Note 2 explicitly states that compliance with the preceding issue satisfies this amendment, indicating no expansion of affected aircraft, operational requirements, or technical specifications. The directive continues to address only the specific Piper models originally targeted for the airspeed placard modification."},"complexity_factors":["Extremely short length (under 250 words)","Only two specific aircraft models affected with unambiguous serial number ranges","Simple binary compliance pathway (two service bulletin options with corresponding deadlines)","No defined terms, interpretation sections, or legislative cross-references","Single operational requirement with no exceptions, exemptions, or conditional provisions","Straightforward applicability criteria using objective data (serial numbers)"],"plain_english_summary":"**What it is:** This directive orders owners of specific Piper PA-31 aircraft to install new airspeed limitation placards in the cockpit.\n\n**Who it affects:** Owners and operators of:\n- Piper PA-31P aircraft with serial numbers 31P-1 through 31P-7630007\n- Piper PA-31-325 aircraft with serial numbers 31-7400990 through 31-7612110\n\n**What you must do:** Install an airspeed placard that clearly displays speed limits in **knots** (nautical miles per hour). You must follow either Piper Service Bulletin No. 478 or No. 544.\n\n**When:** Complete the work within 100 hours of flight time after 31 May 1976 (if using Bulletin 478) or after 31 May 1977 (if using Bulletin 544).\n\n**Why it matters:** Accurate airspeed placards prevent pilots from exceeding safe speeds, which could damage the aircraft or cause loss of control. This ensures pilots have clear speed limits displayed in the standard aviation unit of measurement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation","history":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation/history","analysis":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation/analysis","conflicts":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation/conflicts","importantCases":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation/important-cases","documents":"/api/acts/ad-pa-31-42-amdt-2-airspeed-placard-installation/documents"}}