I recently installed an E-Drive starter and it stays engaged for three or four propeller rotations and then disengages. What could be the problem?
Early production models of the E-Drive were susceptible to excessive aircraft system voltage drop, resulting in pinion hold in issues. A revised circuit board and solenoid coil have resolved this issue. The following checks can help determine if the starter should be replaced with an upgraded unit. First, verify the voltage at the battery. Next, verify the voltage drop at the starter is not more than volt less than the system voltage. If these two voltages are within acceptable limits, there may be a problem with the circuit board located within the starter. As this is not a field replaceable component, the starter will need to be replaced.
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