{"id":"F2006B06402","name":"AD/PW-P/14 - Cam Reduction Gear Assembly - Replacement","slug":"ad-pw-p-14-cam-reduction-gear-assembly-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47728,"registerId":"commonwealth-F2006B06402-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PW-P/14 - Cam Reduction Gear Assembly - Replacement","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/14 Cam Reduction Gear Assembly - Replacement NK\n\nApplicability: Wasp Junior and R985.\n\n \n\nDocument: 1. Pratt & Whitney SB 1671 Supp. No. 1 Rev. A; or 2. FAA AD 66-14-4.\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\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 standard, narrow Airworthiness Directive focused on a specific mechanical defect in specific engine models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Simple unconditional directive structure: applicability + action + deadline","Single compliance pathway with two alternative technical references","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:**\nThis directive orders the **replacement of the cam reduction gear assembly** on specific Pratt & Whitney piston aircraft engines.\n\n**Who it affects:**\nOwners and operators of aircraft fitted with **Wasp Junior** or **R985** model Pratt & Whitney piston engines.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They are issued when a safety defect or unsafe condition is discovered in an aircraft or engine. This particular directive requires immediate action (\"forthwith\") to replace a specific engine component to prevent potential engine failure or safety incidents.\n\n**Key details:**\n- **Compliance deadline:** Immediately (forthwith)\n- **Technical reference:** Operators must follow either Pratt & Whitney Service Bulletin 1671 Supplement No. 1 Revision A, or the equivalent US Federal Aviation Administration (FAA) Airworthiness Directive 66-14-4\n- **Legal force:** Non-compliance means the aircraft cannot legally fly in Australian airspace"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument, as presented, sets a specific, narrow requirement: replace the cam reduction gear assembly on Wasp Junior and R985 engines and do so immediately. The text does not indicate any expansion or contraction of the affected population or a change from a prior stated intent within this document; it simply prescribes replacement and points to external technical documents for the method (Applicability; Document; Compliance)."},"complexity_factors":["Narrow technical scope limited to cam reduction gear assembly replacement on two engine types (Applicability)","Immediate compliance timing ('Forthwith') which reduces discretionary options for scheduling (Compliance)","Dependence on external technical documents (Pratt & Whitney SB 1671 Supp. No. 1 Rev. A; FAA AD 66-14-4) for procedural detail (Document)","Operational and logistical complexity arising from parts availability, labour and aircraft downtime (implicit from Applicability/Compliance)","Low statutory text complexity — the directive is short and prescriptive, but technical execution relies on external sources (Document)"],"plain_english_summary":"This directive requires immediate replacement of the cam reduction gear assembly on Pratt & Whitney Wasp Junior (R985) engines, directing operators to follow the referenced Pratt & Whitney or FAA procedures. It affects aircraft owners, operators and maintenance organisations, and matters because compliance is mandatory forthwith—causing direct costs, downtime and reliance on the referenced service/AD documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement","history":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement/history","analysis":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement/analysis","conflicts":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement/conflicts","importantCases":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement/important-cases","documents":"/api/acts/ad-pw-p-14-cam-reduction-gear-assembly-replacement/documents"}}