{"id":"F2006B08422","name":"AD/CESSNA 550/17 Amdt 1 - Fuel Flow Transmitters","slug":"ad-cessna-550-17-amdt-1-fuel-flow-transmitters","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115894,"registerId":"commonwealth-F2006B08422-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 550/17 Amdt 1 - Fuel Flow Transmitters","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 550 (Citation II) Series Aeroplanes\n\nAD/CESSNA 550/17\n\nAmdt 1\n\n  \nFuel Flow Transmitters 5/91\n\nApplicability: Citation 500, 551, S550, 560 model aircraft fitted with P/N 9912031-6 fuel flow transmitters.\n\nRequirement: Action in accordance with Cessna Alert Service Bulletin; 1. Model 550/551: SBA550-73-3 Rev 3, or\n\n    2. Model S550: SBAS550-73-1 Rev 3, or\n\n    3. Model 560: SBA560-73-1 Rev 3 as applicable.\n\nCompliance: As detailed in Requirement document but with a revised effectivity date of 16 May 1991 for Australian registered aircraft.\n\nBackground: This Directive has been amended to increase the aircraft models applicable, increase the serial number range of affected fuel flow transmitters, and to provide a terminating action. As detailed in the Requirement documents, affected transmitters are to be inspected at repetitive intervals until such time as Ragen Data System Inc. Quality Standard Procedure Instruction Number QSPI 3-36 Revision C has been accomplished.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1677},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"Expanded from original scope to cover additional Cessna aircraft models (now includes 500, 551, S550, and 560), widened the serial number range of affected fuel flow transmitters, and introduced a terminating action (QSPI 3-36 Rev C compliance) to end the repetitive inspection requirement."},"complexity_factors":["Requires cross-referencing to three different external Cessna Alert Service Bulletins depending on specific aircraft sub-model","Imposes repetitive inspection obligations with conditional terminating action dependent on compliance with external manufacturing quality standard (Ragen QSPI 3-36 Rev C)","Technical aviation-specific nomenclature including manufacturer part numbers (P/N 9912031-6) and industry-specific compliance documentation"],"plain_english_summary":"This directive requires owners/operators of certain Cessna Citation business jets (Models 500, 551, S550, 560) equipped with fuel flow transmitter P/N 9912031-6 to perform recurring inspections per Cessna Alert Service Bulletins and ultimately install a manufacturer-specified modification (Ragen Data System QSPI 3-36 Rev C) that terminates the inspections.\n\nCompliance for Australian-registered aircraft must begin by 16 May 1991. It matters because faulty transmitters can give incorrect fuel-flow readings, risking miscalculated fuel reserves and possible engine fuel starvation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters","history":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters/history","analysis":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters/analysis","conflicts":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters/conflicts","importantCases":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters/important-cases","documents":"/api/acts/ad-cessna-550-17-amdt-1-fuel-flow-transmitters/documents"}}