MD-11 Flight Crew Operations Manual
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Engines -
Description and Operation
Eng.10.8
Emergency Shutdown
In case of an engine fire, the fire detector system actuates the red MASTER
WARNING lights and the fire bell, both ENG FIRE handles and FUEL switch
will illuminate. Emergency shutdown is accomplished with individual ENG FIRE
handles on the aft overhead panel. Pulling the ENG FIRE handles down actuates
the generator field disconnect and shuts off electrical, fuel, and hydraulics. The
associated air system is depressurized when the air system is operating in the
automatic mode.
Fire agent discharge is accomplished by exerting a force forward against the
forward stop, while simultaneously twisting the handle in the agent position. The
turning action in one direction will activate one discharge switch, opposite motion
will activate the other switch.
If the pilot pulls one of the ENG FIRE handles down, a warning (disagreement)
light in the related engine FUEL switch is illuminated or remains illuminated in
case of engine fire. The light will be extinguished when the engine FUEL switch
is placed in the OFF position.
Oil System
Each engine oil system is self-contained. Oil for engine lubrication is supplied
from an oil tank. Oil is pumped under pressure to the engine and returns to the
tank.
An oil pressure indicating system is installed on each engine to indicate current oil
pressure to the flight crew. An oil pressure transmitter senses the differential
pressure.
The ENG (1, 2, or 3) OIL FILTER alert indicates a clogged or an impending
clogging of the oil filter. The filter bypass valve will open when the oil filter is
clogged. All contaminated oil will then bypass the filter and go directly to the
engine.
ENG (1, 2, or 3) OIL FILTER alerts are accompanied by the MASTER
CAUTION lights and are inhibited when the oil temperature is below 35°C.
An oil quantity sensor is installed in the oil tank. It contains a magnetic float
supported by the oil level in the tank. As the oil level changes the float causes
switches to close.
All oil indications will be shown on the secondary engine page of the SD.
Appropriate alerts will appear on the EAD and the SD.
A conflict between oil pressure displays on the SD and related alerts indicates a
sensor failure.
October 02, 2006
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