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Push–Button Switches
The airplane has two types of push–button switches: alternate action and
momentary action. Both types direct crew attention to system status and faults.
CAUTION: Flight crews should not change switch bulbs. Contact
maintenance personnel whenever a bulb requires changing.
Damage may result if bulbs are changed with the system
powered. Switch bulb changes on the mode control panel may
affect system operation in flight.
Alternate Action Switches
Alternate action switches have two positions: on and off.
When pushed in and flush with the panel, the switch is on. The switch indicates
the system is on by displaying a word or flow bar.
When pushed out and extended, the switch is off. The switch indicates the system
is off by not displaying a word or not displaying the flow bar.
1 Switch is ON
ON, AUTO, or flow bar visible.
For some switches, system status (FAULT, MAN, OFF, VALVE) may be shown
in the lower half of the switch.
ON
FAULT
OFF
1
2
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
1.30.2 D6-30151-425
Airplane General, Emergency
Equipment, Doors,Windows -
Controls and Indicators
2 Switch is OFF
OFF or a line is visible –
• the top of the switch is blank
• a line indicates no label in this portion of the switch
Momentary Action Switches
Momentary action switches are spring loaded to the extended position. They
activate or deactivate systems or reset system logic. The switch display indicates
system status.
1 Push to Reset
Push – resets master lights and aural alerts.
2 System Operation
Push – activates or deactivates the system.
Passenger Signs
1 NO SMOKING Selector
OFF – NO SMOKING signs are not illuminated.
DISCH
WARNING
CAUTION
1
2
AFT AISLE STAND
1 2
OFF
AUTO
OFF
AUTO
ON
SEATBELTS
ON
NO SMOKING
December 01, 1999
747 Operations Manual
Airplane General, Emergency
Equipment, Doors,Windows -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 1.30.3
AUTO – NO SMOKING signs illuminate or extinguish with reference to airplane
altitude and system configuration (refer to Lighting System Description section).
ON – NO SMOKING signs illuminate.
Note: Anytime passenger oxygen deploys, NO SMOKING and FASTEN SEAT
BELTS signs illuminate and RETURN TO SEAT signs extinguish,
regardless of selector position.
2 SEAT BELTS Selector
OFF – FASTEN SEAT BELTS and RETURN TO SEAT signs are not illuminated.
AUTO – FASTEN SEAT BELTS and RETURN TO SEAT signs illuminate or
extinguish with reference to airplane altitude and system configuration (refer to
Lighting System Description section).
ON – FASTEN SEAT BELTS and RETURN TO SEAT signs illuminate.
Note: Anytime passenger oxygen deploys, NO SMOKING and FASTEN SEAT
BELTS signs illuminate and RETURN TO SEAT signs extinguish,
regardless of selector position.
Lighting
Flight Deck Lighting
Storm Lights Switch
1 STORM Lights Switch
ON - overrides normal controls and illuminates the following lights at maximum
brightness:
• Captain’s and First Officer’s lights
• glareshield lights
OVERHEAD PANEL
ON
OFF
STORM
1
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
1.30.4 D6-30151-425
Airplane General, Emergency
Equipment, Doors,Windows -
Controls and Indicators
• aisle stand flood lights
• dome lights
Circuit Breaker/Overhead Panel Lights Control
1 Circuit Breaker/Overhead (CKT BKR OVHD) Panel Lights Control
Rotate - controls circuit breaker panel and overhead panel brightness.
Glareshield Panel/Flood Lights Control
1 GLARESHIELD PANEL/FLOOD Lights Control (inner)
Rotate - controls left and right glareshield flood lights.
2 GLARESHIELD PANEL/FLOOD Lights Control (outer)
Rotate - controls glareshield panel lights.
OVERHEAD PANEL
OFF
CKT BKR
OVHD PANEL
1
OVERHEAD PANEL
GLARESHIELD
OFF
PANEL/FLOOD
1 2
December 01, 1999
747 Operations Manual
Airplane General, Emergency
Equipment, Doors,Windows -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 1.30.5
Dome Lights Control
1 DOME Lights Control
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