{"id":"F2006B09948","name":"AD/FK-P/3 - Engine Drive Fuel Pump - Inspection","slug":"ad-fk-p-3-engine-drive-fuel-pump-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55205,"registerId":"commonwealth-F2006B09948-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FK-P/3 - Engine Drive Fuel Pump - Inspection","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)  Franklin Piston Engines\n\n \n\nAD/FK-P/3 Engine Drive Fuel Pump - Inspection NK\n\nApplicability: Model 6A-350-C1 with S/Nos 52501 and subsequent and Model 6A-335-B1A with S/Nos 56001-3 and subsequent fitted with fuel pumps Part No 20574.\n\n \n\nRequirement: Franklin SB No 114.\n\n \n\nCompliance: Part 1. Inspection of Pump Diaphragm. Within 5 hours time in service after 6 March 1972 and thereafter at intervals not exceeding 100 hours time in service.\n\n \n\nPart 2. Inspection for Fuel Leaks. At intervals not exceeding 50 hours time in service after 6 March 1972.\n\n \n\nNote: Inspection for fuel leaks as per Part 2 may be carried out and certified by the pilot.\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 fuel pump inspections for two Franklin engine models. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined applicability criteria (engine models and serial numbers)","Simple two-part compliance structure with clear time intervals","No cross-references to other legislation beyond 'Franklin SB No 114' (a manufacturer service bulletin)","Single conditional note regarding pilot certification authority","No nested exceptions or conditional logic"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety notice) issued by Australia's Civil Aviation Safety Authority for specific **Franklin piston aircraft engines**.\n\n**What it does:**\n- Requires owners/operators of certain Franklin engine models to inspect the **engine-driven fuel pump** on a strict schedule to prevent fuel leaks and pump failures.\n\n**Who it affects:**\n- Owners of aircraft with **Franklin Model 6A-350-C1** engines (serial numbers 52501 and later) or **Model 6A-335-B1A** engines (serial numbers 56001-3 and later) that have **fuel pump Part No 20574** installed.\n\n**What must be done:**\n- **Part 1:** Inspect the pump's rubber diaphragm (a flexible seal that prevents fuel from leaking) within 5 flight hours after 6 March 1972, then **every 100 flight hours** after that.\n- **Part 2:** Check for fuel leaks **every 50 flight hours** after 6 March 1972.\n\n**Special note:** Pilots themselves can perform and sign off on the leak inspection (Part 2) — it doesn't require a licensed aircraft mechanic.\n\n**Why it matters:**\nFuel pump failures can cause engine stoppage in flight. This directive prevents catastrophic accidents by catching diaphragm deterioration and leaks before they cause engine failure."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text shows a narrowly targeted directive applying to specific engine models, serial number ranges and pumps (Applicability) and prescribing inspection intervals (Compliance: Part 1; Compliance: Part 2). There is no indication in the document that the scope has been altered from its original stated applicability or that additional aircraft, parts, or inspection types have been added."},"complexity_factors":["Narrow, specific applicability limited to two engine models, certain serial numbers, and a single pump part number (Applicability).","Two distinct inspection obligations with different intervals and an immediate short initial compliance window for Part 1 (Compliance: Part 1; Compliance: Part 2).","Delegation of certification for one inspection to pilots, creating a mix of who may lawfully certify compliance (Note).","Reliance on an external document (Franklin SB No. 114) for the detailed inspection procedure (Requirement).","Historic fixed dates and hours-based intervals which require accurate time-in-service tracking (Compliance: Part 1; Compliance: Part 2)."],"plain_english_summary":"This directive mandates recurring inspections of engine‑drive fuel pump Part No. 20574 fitted to Franklin piston engines (Model 6A‑350‑C1 s/n 52501+ and Model 6A‑335‑B1A s/n 56001–3+). Diaphragm checks follow an initial 5‑hour window then 100‑hour intervals; fuel‑leak checks are every 50 hours and may be performed and certified by the pilot. Affected owners/operators must follow Franklin Service Bulletin No.114 and bear inspection and repair costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection","history":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection/history","analysis":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection/analysis","conflicts":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection/conflicts","importantCases":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection/important-cases","documents":"/api/acts/ad-fk-p-3-engine-drive-fuel-pump-inspection/documents"}}