{"id":"F2006B06409","name":"AD/PW-P/8 - Operating Restrictions - Placarding","slug":"ad-pw-p-8-operating-restrictions-placarding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47751,"registerId":"commonwealth-F2006B06409-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PW-P/8 - Operating Restrictions - Placarding","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Pratt and Whitney Piston Engines\n\n \n\nAD/PW-P/8 Operating Restrictions - Placarding NK\n\nApplicability: R2000 series.\n\n \n\nRequirement: 1. Avoid steady operation of engines in the 2310 to 2510 r.p.m. range.\n\n \n\n2.    The R.P.M. indicator(s) in aircraft fitted with these engines shall be marked with a suitable red section over the 2310 to 2510 r.p.m. range, on the instrument face.\n\n \n\n3.    A placard shall be placed adjacent to the r.p.m. indicator(s) warning against prolonged operation in the 2310 to 2510 r.p.m. range.\n\n \n\nor ANO 106.1.12.4.7.1.\n\n \n\nCompliance: 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1922},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope as a specific technical safety mandate for a defined engine series. There is no evidence of scope expansion beyond the immediate operational safety purpose."},"complexity_factors":["Extremely short instrument with only three substantive operational requirements","No defined terms, interpretation sections, or cross-references to other legislation (except one alternative compliance notice)","Single, unambiguous applicability criterion (R2000 series engines)","Immediate compliance with no conditional triggers, phased implementation, or exceptions","Specific numeric parameters (2310-2510 RPM) leave no room for interpretation"],"plain_english_summary":"**What it does:** This safety directive imposes immediate operating restrictions on specific aircraft engines to prevent mechanical damage.\n\n**Who it affects:** Operators of aircraft fitted with **Pratt & Whitney R2000 series** piston engines (the R-2000 Twin Wasp).\n\n**The requirements:**\n*   **Avoid the danger zone:** Do not run the engine at steady speeds between **2310 and 2510 RPM** (revolutions per minute). This range likely causes harmful vibrations or mechanical stress.\n*   **Mark the gauge:** The RPM indicator (tachometer) must have a **red marking** (an arc or block) over the 2310-2510 range to give pilots an immediate visual warning.\n*   **Install a placard:** Place a warning sign next to the RPM gauge alerting pilots against prolonged operation in this restricted range.\n*   **Alternative compliance:** Instead of the above, operators may follow **Airworthiness Notice 106.1.12.4.7.1** (an alternative technical standard).\n\n**When it takes effect:** Immediately (\"Forthwith\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw-p-8-operating-restrictions-placarding","history":"/api/acts/ad-pw-p-8-operating-restrictions-placarding/history","analysis":"/api/acts/ad-pw-p-8-operating-restrictions-placarding/analysis","conflicts":"/api/acts/ad-pw-p-8-operating-restrictions-placarding/conflicts","importantCases":"/api/acts/ad-pw-p-8-operating-restrictions-placarding/important-cases","documents":"/api/acts/ad-pw-p-8-operating-restrictions-placarding/documents"}}