Ground Tests Switch

Ground (GND) TESTS Switch
ENABLE – allows CMC to initiate ground tests of airplane systems.
NORM (Normal) -systems configured for flight.

Copyright . The Boeing Company. See title page for details.
1.30.12  D6-30151-425 December 01, 1999

Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators
Oxygen Systems Oxygen Indications

Oxygen Pressure (OXY PR) Display
Displays crew and passenger oxygen cylinder pressure (PSI). Note: Access is through display select panel STAT switch. Passenger Oxygen Switch

PASSENGER (PASS) OXYGEN Switch
RESET (spring–loaded) – flow control units closed electrically when cabin altitude below 12,000 feet NORM – system activates if cabin altitude reaches approximately 14,000 feet ON (spring-loaded) – passenger cabin oxygen masks drop.
Copyright . The Boeing Company. See title page for details.
December 01, 1999 D6-30151-425 1.30.13
Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators 747 Operations Manual

Oxygen Mask Panel

Oxygen Flow Indicator
Shows a yellow cross when oxygen flowing.

Oxygen Mask Release Levers
Squeeze and pull –
.
unlocks oxygen panel doors

.
releases mask
. oxygen turns on when oxygen panel doors open

.
flow indicator shows a yellow cross momentarily as harness inflates

.  
when Captain’s or First Officer’s left-hand door opens, activates Captain’s and First Officer’s mask microphones

Squeeze (right lever) – inflates mask harness.
Release – deflates mask harness into position on head and face.
Copyright . The Boeing Company. See title page for details.
1.30.14  D6-30151-425 October 1, 2000
Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators
747 Operations Manual
3 RESET/TEST Switch
Push –
.  
with left oxygen panel door closed and OXY ON not displayed, turns
oxygen on momentarily to test regulator

.  
with the left oxygen panel door closed and the OXY ON flag displayed,
turns oxygen off, deactivates the mask microphone, and activates the
boom microphone

Oxygen Mask and Regulator
1
Mask Microphone Regulator
EMERGENCY
PRESS
TO
TEST

2
CREWMEMBER STATION (1 each)
1 NORMAL/100% Switch
N – supplies an air/oxygen mixture on demand (the ratio depends on cabin
altitude).
100% – supplies 100% oxygen on demand (not an air/oxygen mixture).

2 Oxygen Mask Emergency/Test Selector
Rotate (in the direction of the arrow) – supplies 100% oxygen under positive pressure at all cabin altitudes (protects against smoke and harmful vapors). PRESS TO TEST– tests the positive pressure supply to the regulator.
Copyright . The Boeing Company. See title page for details.
April 01, 2001 D6-30151-425  1.30.15
Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators 747 Operations Manual

Emergency Evacuation Panel

Evacuation (EVAC) PRESS TO TEST Switch
Push – tests the EVAC light.

Evacuation COMMAND Switch
ON –
.
activates evacuation signal system

.  
amber EVAC light (flight deck) and amber EVAC lights (attendant
panels) flash

.
audio horn sounds at each panel. ARM – evacuation signal can be activated at flight attendant panel

OFF – allows activation at a flight attendant panel of EVAC COMMAND switch. Activation sounds the pulsating audio signal at the flight deck panel and illuminates a flashing amber light at the flight deck panel and the flight attendant emergency evacuation panel which was activated.

Evacuation HORN SHUTOFF Switch
PUSH – silences flight deck evacuation signal horn.

Evacuation (EVAC) Light
Illuminated (amber) – a command switch is in the ON position.

EVACUATION SIGNAL Horn
Sounds an audio signal.
Copyright . The Boeing Company. See title page for details.
1.30.16  D6-30151-425 April 1, 2000

Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators
747 Operations Manual
Smoke Evacuation Handle

Smoke Evacuation Handle
Pull – . opens flight deck smoke evacuation port
. effective only if airplane pressurized.
Copyright . The Boeing Company. See title page for details.
December 01, 1999 D6-30151-425 1.30.17
Airplane General, Emergency Equipment, Doors, Windows -Controls and Indicators 747 Operations Manual
　
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