737 Flight Crew Operations Manual
Supplementary Procedures -
Electrical
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP SP.6.3
Note: If fuel is loaded in the center tank, position the left center
tank fuel pump switch ON to prevent a fuel imbalance
before takeoff.
CAUTION: Center tank fuel pump switches should be
positioned ON only if the fuel quantity in the
center tank exceeds 453 kgs.
CAUTION: Do not operate the center tank fuel pumps with
the flight deck unattended.
When the APU GEN OFF BUS light is illuminated:
APU GENERATOR bus switches - ON
Verify that the SOURCE OFF lights are extinguished.
Verify that the TRANSFER BUS OFF lights are extinguished.
Verify that the STANDBY PWR OFF light is extinguished.
Verify that the APU MAINT light is extinguished.
Verify that the APU LOW OIL PRESSURE light is extinguished.
Verify that the APU FAULT light is extinguished.
Verify that the APU OVERSPEED light is extinguished.
Wheel well fire warning system ..............................................Test
Test switch – Hold to OVHT/FIRE
Verify fire warning bell sounds, master FIRE WARN lights,
MASTER CAUTION lights and OVHT/DET annunciator
illuminate.
Fire warning BELL CUTOUT switch – Push
Verify that the master FIRE WARN lights extinguish.
Verify that the fire warning bell cancels.
Verify that the WHEEL WELL fire warning light is
illuminated.
Electrical Power Down
This procedure assumes the Secure procedure is complete.
APU switch and/or GRD POWER switch........................................ OFF
If APU was operating:
Delay approximately 2 minutes after the APU GEN OFF BUS
light extinguishes before placing the BATTERY switch OFF.
September 15, 2016
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