projects:challenger604:boostpumpswitchtroubleshooting
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projects:challenger604:boostpumpswitchtroubleshooting [2022/09/12 21:35] dwheele [Notes] |
projects:challenger604:boostpumpswitchtroubleshooting [2022/09/14 05:21] (current) dwheele [Conclusion] |
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| * Don has a spare relay on hand | * Don has a spare relay on hand | ||
| * Replacement pump costs $9000 | * Replacement pump costs $9000 | ||
| - | * Don bought replacement switch 9/11/2022 | + | * Don bought replacement switch 9/11/2022, to be delivered to Duncan, who will install it. |
| + | |||
| + | ===== Conclusion ====== | ||
| + | |||
| + | We removed the fuel assembly in the cockpit, and measured ohms between pin underscore-C and underscore-D. On the Right Hand Fuel Boost Switch, it measured about 600 ohms and the same spot on the LH switch it measured about 16 ohms. As a comparison, we measured other contacts, such as B to underscore-Z, | ||
| + | |||
| + | It appears that indeed the **RH Fuel Boost Switch needs to be replaced, and the LH switch should also be replaced.** This agrees with Don's input that the LH switch did cause one failure, but otherwise the RH switch had the faulty result. | ||
| Line 52: | Line 58: | ||
| I don't know how hard it is to get to the back of that switch so I can measure. | I don't know how hard it is to get to the back of that switch so I can measure. | ||
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| + | ------------ | ||
| + | |||
| + | It turns out that to measure between CC and CNO, it is required to measured at the nearby Canon plug underscore-c to underscore-d. | ||
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| + | |||
| ===== Information ====== | ===== Information ====== | ||
| Line 58: | Line 70: | ||
| ==== Challenger 605 Fuel Distribution Schematic ==== | ==== Challenger 605 Fuel Distribution Schematic ==== | ||
| {{: | {{: | ||
| + | |||
| + | * 1 - L (R) Collector Tank | ||
| + | * 2 - L (R) Boost Pump / APU Boost Pump | ||
| + | * 3 - L (R) Main Ejector | ||
| + | * 4 - L (R) Scavenge Ejector | ||
| + | * 5 - L (R) Transfer Ejector | ||
| + | * 6 - L (R) Transfer Ejector Float Valve | ||
| + | * 7 - L (R) Engine Fuel SOV | ||
| + | * 8 - L (R) Wash Filter | ||
| + | * 9 - L (R) to Aux X_Flow Valve | ||
| + | * 10 - Gravity Crossflow Valve | ||
| + | * 11 - (not shown) | ||
| + | * 12 - (not shown) | ||
| + | * 13 - APU SOV | ||
| + | * 14 - APU Neg-G SOV | ||
| * A - L (R) P Switch = MAIN EJECTOR FAIL (Status MSG) | * A - L (R) P Switch = MAIN EJECTOR FAIL (Status MSG) | ||
| Line 67: | Line 94: | ||
| * G - L (R) FUEL XFLOW SOV OPEN (Abnormal MSG) | * G - L (R) FUEL XFLOW SOV OPEN (Abnormal MSG) | ||
| * H - Engine-Driven Pump | * H - Engine-Driven Pump | ||
| + | |||
| + | {{ : | ||
| {{ : | {{ : | ||
projects/challenger604/boostpumpswitchtroubleshooting.1663018542.txt.gz · Last modified: 2022/09/12 21:35 by dwheele
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