{"id":"F2006B02242","name":"AD/AL 250/20 Amdt 1 - Fuel Pump Drive Shaft - Inspection","slug":"ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41472,"registerId":"commonwealth-F2006B02242-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 250/20 Amdt 1 - Fuel Pump Drive Shaft - 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)  Allison Turbine Engines - 250 Series\n\n \n\nAD/AL 250/20\n\nAmdt 1\n\n\nFuel Pump Drive Shaft - Inspection 9/78\n\n \n\nApplicability: All 250-C18, C20 and C20B series fitted with dual element fuel pumps P/N 6854292, 6857548, 6877719, 6856250 and 68763803.\n\n \n\nDocument: 1. Allison 250-C18 CSL-61, Rev. 3; or\n\n \n\n2. Allison 250-C20/C20B CSL-1007, Rev. 3.\n\n \n\nCompliance: Within 100 hours’ time in service after 30 September 1978 and thereafter at intervals not exceeding 200 hours’ time in service until modified in accordance with Allison 250-C18 CEB-161 or 250-C20/C20B CEB-1051.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2423},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"As Amendment 1, this maintains the original directive's narrow scope as a targeted safety inspection requirement for specific fuel pump drive shafts. It does not expand applicability beyond the original mechanical safety issue."},"complexity_factors":["Heavy reliance on external technical manufacturer documents for procedural details","Precise part number identification required to determine if the directive applies","Technical aviation terminology (e.g., 'time in service', 'dual element fuel pumps')","Calculation of recurring compliance intervals based on accumulated flight hours"],"plain_english_summary":"Requires recurring inspections of fuel‑pump drive shafts on aircraft with Allison 250‑C18, C20, or C20B engines fitted with dual fuel pumps P/N 6854292, 6857548, 6877719, 6856250, or 68763803 to prevent in‑flight drive‑shaft or fuel‑pump failure that could cause total engine loss.\n\nInspections begin within 100 hours time‑in‑service after 30 Sept 1978 and recur every 200 hours until the engine is permanently modified per the manufacturer service bulletins; procedures are in the referenced CSL documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection","history":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection/history","analysis":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection/analysis","conflicts":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection/conflicts","importantCases":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection/important-cases","documents":"/api/acts/ad-al-250-20-amdt-1-fuel-pump-drive-shaft-inspection/documents"}}