Inspection steps:
1. Inspect the coolant tubes, radiator and cold plate for leakage.
Warning: If leakage is present, it is an indication that the coolant level is not at the
required level for operation. This can cause damage to the motor controller as
the motor controller will over heat.
2. Disconnect the pump from the aircraft’s electrical system.
3. Connect pump to an external 12V power supply.
4. Listen for cavitational noises from the pump.
5. In the case of cavitational noises being present refer to 4.11.2.4.4.
DC-DC converter
The DC-DC converter converts the HV (400V) to 12 V to supplement the 12 V avionic batteries.
The DC-DC converter is located on the left side of the wheel box and motor controller
assembly. The DC-DC converter is fastened to two brackets which is bonded to B8 and the
wheelbox.
Specification
Table 4-3 DC-DC converter specifications
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