787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Electrical -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
6.10.4 D615Z003-TBC
Towing Power Panel
Push – applicable towing battery charge light illuminates, indicating the current
state of charge of the batteries (HIGH, MEDIUM, LOW).
ON – selects the main and APU batteries for energizing the “Towing Power”
mode. Applicable towing battery charge light illuminates. (Refer to Modes of
Operation in Chapter 6, Section 20, for additional information.)
OFF – De-energizes the “Towing Power” mode.
Illuminated (white) – the battery TOWING POWER switch is ON.
Illuminated (white) – pushing the towing battery TEST switch illuminates one of
the following battery state of charge indicators:
• HIGH – a minimum of 60 minutes remains before battery charge is
depleted.
• MEDIUM – a minimum of 30 minutes remains before battery charge is
depleted.
• LOW – a minimum of 15 minutes remains before battery charge is
depleted.
Note: Minimum times assume steady state towing (no braking) before batteries
are depleted. If heavy braking occurs, actual time remaining may fall
below the minimum times listed.
1
Towing Battery Test Switch
2
TOWING POWER Switch
3
ON BAT Light
4
Towing Battery Charge Lights
TOWING POWER PANEL
ON
TOWING
POWER
BATTERY
TEST
ON BAT
LOW
MEDIUM
HIGH
1
3
2
4
August 14, 2009
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