737 Flight Crew Operations Manual
Supplementary Procedures -
Airplane General, Emer. Equip.,
Doors, Windows
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP SP.1.3
If the potable water tank will not be refilled immediately after the system
is emptied, open the following circuit breakers and attach DO–NOT–
CLOSE tags:
P18–3 circuit breaker panel
• LAVATORY WATER HEATER A
• LAVATORY WATER HEATER D
• LAVATORY WATER HEATER E
Power distribution panel number 1
• POT WATER COMPRESSOR
• WATER QTY IND
Oxygen Mask Microphone Test
FLT INT switch ................................................................................Push
SPKR switch ........................................................................................On
TEST/RESET switch ......................................................... Push and hold
EMERGENCY/Test selector ............................................. Push and hold
Push-to-Talk switch .............................................................................I/C
Simultaneously push the Push-to-Talk switch, the
EMERGENCY/Test selector and the TEST/RESET switch.
Verify oxygen flow sound is heard through the flight deck speaker.
Push-to-Talk switch ..................................................................... Release
EMERGENCY/Test selector ....................................................... Release
TEST/RESET switch ................................................................... Release
SPKR switch ............................................................................As needed
ETOPS
Operators conducting ETOPS are required to comply with appropriate
regulations. An operator must have an ETOPS configured and approved
airplane, and approved flight operations and maintenance programs in
place to support ETOPS.
APU Operation
Unless otherwise authorized, start the APU before the ETOPS segment.
The APU must be on for the entire ETOPS segment.
September 24, 2015
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