Boeing 787-8 - Page 745

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Engines, APU -
Engine System Description
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 7.20.19
Oil pressure, temperature, and quantity are displayed on the engine display. Oil
pressure is measured prior to entering the engine by dual oil pressure transmitters
(there is no discrete low pressure switch). The EICAS caution message ENG OIL
PRESS L or R is displayed if pressure decreases below the operating limit.
[Option – GE engines]
Oil temperature is measured prior to entering the engine by dual oil temperature
transmitters. The EICAS advisory message ENG OIL TEMP L or R is displayed
when oil temperature reaches the high amber band.
[Option – RR engines]
Oil temperature is measured after leaving the engine by dual oil temperature
transmitters. The EICAS advisory message ENG OIL TEMP L or R is displayed
when oil temperature reaches the red line limit.
There is no minimum oil quantity limit (no amber or red line limit); however, a
low oil quantity causes automatic display of the secondary engine display and
reverses the display indication to show black numbers on a white background.
There are no operating limitations for the engine oil quantity; therefore, there are
no flight crew procedures based solely on a response to low oil quantity.
Engine Oil System Schematic
[Option – GE engines]
Air/Oil
Heat Exchanger
Air
Fuel/Oil
Heat Exchanger
Fuel
Gearbox
Main Bearings
Accessory Drives
Oil
Filter
Oil
Pump
B
Scavenge
Pump
Oil
Tank
February 15, 2010