28vdc power is supplied to the EIS as shown in the table
below. This configuration prevents a total loss of electrical power to the
EIS in the event of
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Built in Test-Equipment or (BITE) continuously monitor the EIS for system failures. Should a failure occur on aircraft 112 and later, torque pressure and interturbine temperature data can be supplied by the secondary circuit by press the MENU1 button located in the lower center of the DU. When this menu is selected, the digital readout of OAT and ENDUR are then replaced with ITT2 and TRQ3 readouts respectively and the primary TRQ and ITT displays go blank. The system may be tested before or inflight by using the
EIS Test6 switch. This will test all
readouts and LCD displays for 6 seconds then return to normal. |
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Also located on the DU between the MENU and the TEST button is the FUEL
RESET4 button.
Pressing this button will reset the USED5
fuel counter back to 0. This would be the fuel amount used during that leg
of the flight. By using this, you can at each leg or stop, record the amount
of fuel used for that leg or stop and then zero out and record the amount
for the next leg or stop.
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