MD-11 Flight Crew Operations Manual
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Electrical Chapter Elec
Alerts Section 40
Elec.40.1
Elec.40 Electrical-Alerts
NOTE: The associated cue switch is shown in parenthesis (XXX)
following the alert.
Amber Boxed Alerts (Level 2)
BUS L EMER AC OFF (ELEC) - The left emergency ac bus is unpowered.
BUS L EMER DC OFF (ELEC) - The left emergency dc bus is unpowered.
ELEC ALERTS (ELEC) - DEUs are not receiving data from the EPCU.
GEN 1/2/3 OFF (ELEC) - Generator 1/2/3 fault (manual mode). A protective
trip has occurred.
GEN ALL OFF (ELEC) - No engine driven generator or APU generator is
supplying electrical power. Fuel pressure to engine 2 may not be
available. Without fuel tank pump pressure, engine 2 will probably
flameout. If the ADG is deployed and ADG ELEC is on, the left aft pump
in tank 2 can supply fuel pressure to engine 2. This pump will be powered
from the right emergency ac bus. The tail tank alt pump can also be
powered when the right emergency ac bus is powered.
GEN BUS 1/2/3 FAULT (ELEC) - The respective generator bus has been
de-energized. Fault exists.
GEN DRIVE 1/2/3 FAULT (ELEC) - The respective generator drive oil
temperature is high or pressure is low or oil differential temp is out of
limits.
GEN LOAD HI (ELEC) - One or more engine driven generators or the APU
generator has exceeded load limit.
Amber Alerts (Level 1)
AC TIE 1/2/3 OFF (ELEC) - If the respective AC TIE switch ARM light is
illuminated, the relay has opened due to a fault. The system may be in
auto or manual. If the respective AC TIE switch OFF light is illuminated,
the relay has been commanded open by overhead panel switch action.
The system may only be in manual. The OFF light will not illuminate in
auto.
AC TIE FAULT (ELEC) - The ac tie bus is inoperative. Relays are locked
out.
ADG ELEC SW ON (ELEC) - The ADG ELEC switch on the ELEC control
panel has been selected ON.
October 02, 2006
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