1) 1 TRANSFER BUS OFF
2) 1 SOURCE OFF
3) 2 TRANSFER BUS OFF
4) 2 SOURCE OFF
F. Engine Start with APU Power and Switch Check
SUBTASK 24-21-00-710-006
(1) Do the check as follows:
(a) Start the No. 1 engine. To start it, do this task: Start the Engine Procedure (Selection),
TASK 71-00-00-800-807-F00.
CAUTION
THE DRIVE LIGHT ON THE P5 PANEL SHOULD GO OFF AFTER THE
ENGINE GETS UP TO IDLE SPEED. IF THE DRIVE LIGHT COMES ON
WHEN THE ENGINE IS AT OR ABOVE IDLE SPEED, THE DISCONNECT
SWITCH ON THE P5 PANEL MUST BE PUSHED. FAILURE TO PUSH THE
DISCONNECT SWITCH CAN CAUSE DAMAGE TO THE IDG.
(b) Make sure the number 1 DRIVE light on the P5-5 panel goes off after number 1 engine
reaches idle speed.
(c) Set the GEN 1 switch on the P5-4 panel to the ON position.
(d) Make sure the 1 GEN OFF BUS light on the P5-4 panel goes off.
(e) Make sure these lights stay off:
1) APU GEN OFF BUS
2) 1 TRANSFER BUS OFF
3) 1 SOURCE OFF
4) 2 TRANSFER BUS OFF
5) 2 SOURCE OFF
(f) Set the AC meter selector switch on the P5-13 panel to the GEN 1 position.
(g) Make sure the AC meter shows these values:
1) AC VOLTS = 110-120
2) CPS FREQ = 395-405
(h) Start the No. 2 engine. To start it, do this task: Start the Engine Procedure (Selection),
TASK 71-00-00-800-807-F00.
CAUTION
THE DRIVE LIGHT ON THE P5 PANEL SHOULD GO OFF AFTER THE
ENGINE GETS UP TO IDLE SPEED. IF THE DRIVE LIGHT COMES ON
WHEN THE ENGINE IS AT OR ABOVE IDLE SPEED, THE DISCONNECT
SWITCH ON THE P5 PANEL MUST BE PUSHED. FAILURE TO PUSH THE
DISCONNECT SWITCH CAN CAUSE DAMAGE TO THE IDG.
(i) Make sure the number 2 DRIVE light on the P5-5 panel goes off after number 2 engine
reaches idle speed.
(j) Set the GEN 2 switch on the P5-4 panel to the ON position.
(k) Make sure the 2 GEN OFF BUS light on the P5-4 panel goes off.
(l) Make sure the APU GEN OFF BUS light comes on.
(m) Make sure these lights stay off:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-00
Page 503
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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