787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Hydraulics -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
13.10.2 D615Z003-TBC
Illuminated (amber) – the RAT is not in the stowed position.
ON – the engine-driven hydraulic pump pressurizes the related left or right
hydraulic system when engine starts.
Off (ON not visible) – the engine-driven hydraulic pump is turned off and
depressurized.
ON – the pump runs continuously.
AUTO – Pumps alternate as a primary pump and a demand pump. The primary
pump operates continuously and the demand pump operates during high system
demand.
OFF – the pump is off.
Illuminated (amber) –
• low primary pump pressure
• excessive primary pump fluid temperature, or
• pump selected OFF
ON – the pump runs continuously.
AUTO – the pump operates when system and/or primary pump(s) pressure is low,
or when control logic anticipates a large system demand.
OFF – the pump is off.
Illuminated (amber) –
• low demand pump pressure
• excessive demand pump fluid temperature, or
• demand pump is selected OFF
Hydraulic System Indications
Hydraulic system indications are displayed by pushing the systems (SYS) display
switch on the display select panel, then selecting either the status (STAT) synoptic
key or the hydraulic (HYD) synoptic key. (Refer to Display Select Panel
in
Chapter 10, Section 10, for additional information.)
3
Ram Air Turbine Unlocked (UNLKD) Light
4
Left/Right Engine (L/R ENG) PRIMARY Pump Switches
5
C1/C2 Electrical (C1/C2 ELEC) Pump Selectors
6
C1 and C2 Pump FAULT Lights
7
DEMAND (L/R ELEC DEMAND) Pump Selectors
8
Demand Pump FAULT Lights
February 13, 2009
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