WARNING
WHEN APPLYING 115V AC, 400HZ EXTERNAL OR APU GENERATOR
POWER, THE STANDBY HYDRAULIC PUMP CAN OPERATE FOR
APPROX 4 SECONDS AND MAY MOVE THE RUDDER AND THRUST
REVERSERS. TO PREVENT POSSIBLE INJURY, MAKE SURE THE
RUDDER AND THRUST REVERSERS ARE CLEAR OF PERSONNEL
BEFORE APPLYING POWER.
(e) To energize the 115V ac transfer buses, set both of the APU GEN switches on the P5-4
panel to the ON position.
NOTE: Either of the APU GEN switches will connect the APU generator to both
TRANSFER BUSES. However both of the APU GEN switches must be set to the
ON position to make both of the SOURCE OFF lights go off.
NOTE: The APU exhaust gas temperature (EGT) indicator on the P5 forward overhead
panel can spike (move) quickly to half scale (400°C-500°C) when you put an
electrical load on the APU starter-generator and then move down to zero after a
few bounces. This APU condition is satisfactory.
(f) Make sure these lights on the P5-4 panel go off:
1) APU GEN OFF BUS
2) 1 SOURCE OFF
3) 2 SOURCE OFF
4) 1 TRANSFER BUS OFF
5) 2 TRANSFER BUS OFF
END OF TASK
TASK 24-22-00-860-816
7. Remove APU Generator Power
(Figure 201)
A. General
(1) This task has this procedure:
(a) Remove the APU generator power from the 115V AC buses.
B. References
Reference Title
49-11-00-860-802 APU Usual Shutdown (P/B 201)
C. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Procedure
SUBTASK 24-22-00-860-014
(1) Do these steps to remove the APU generator power from the 115V AC transfer buses:
(a) To remove power from the 115V AC transfer buses, set both of the APU GEN switches on
the P5-4 panel to the OFF position.
(b) Make sure these lights on the P5-4 panel come on:
1) APU GEN OFF BUS
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-22-00
Page 210
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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