(h)
Push the BAT switch on the P5 panel to off (out position).
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757 MAINTENANCE MANUAL
GENERATOR, BUS TIE, AND AUXILIARY POWER BREAKERS - REMOVAL/INSTALLATION
_______________________________________________________________________
1. General
_______
A. This procedure has two tasks.
(1)
The first task removes the generator circuit breaker (GCB),the bus tie breaker (BTB),and the auxiliary power breaker (APB), from the airplane.
(2)
The second task installs the GCB, the BTB, and the APB, on the airplane.
(a) These circuit breakers are the same, and this procedure is applicable for all the, GCB, BTB, and APB circuit breakers.
TASK 24-22-03-024-002
2. Remove the GCB, BTB, or APB, Circuit Breakers (Fig. 401)
________________________________________________________
A. References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 27-61-00/201, Spoiler/Speedbrake Control System
B. Prepare for Removal
S 864-003
WARNING: REMOVE ELECTRICAL POWER BEFORE REMOVING OR INSTALLING
_______ COMPONENTS LOCATED IN MAIN POWER CENTERS. HIGH VOLTAGES PRESENT CAN BE FATAL. REFER TO AMM 27-61-00/201 FOR APPROPRIATE SPOILER/SPEEDBRAKE DEACTIVATION PROCEDURE. INADVERTENT SPOILER MOVEMENT RESULTING FROM NEXT STEP COULD CAUSE SERIOUS INJURY TO PERSONNEL.
(1)
Remove electrical power (AMM 24-22-00/201).
S 864-004
(2)
Open this circuit breaker on the main distribution panel P6 and attach DO-NOT-CLOSE tag.
(a) 6A1, BAT BUS DISTR
C. Procedure
S 024-005
(1) Remove the circuit breaker as follows:
(a) Open the panel to gain access to the circuit breaker that is to
be removed. The circuit breakers are located as follows:## Circuit Breaker Location Right GCB C903 P32 Right BTB C904 P32
APB C905 P34 Left GCB C901 P31 Left BTB C902 P31
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757
MAINTENANCE MANUAL
P32 SEE C P54
P31 SEE A
DSEE CIRCUIT BREAKER LEFT GENERATOR C901 P34 SEE B E1 E2
DSEE TIE BREAKER LEFT BUS C902
LEFT GENERATOR POWER PANEL P31 FWD DSEE BREAKER POWER AUXILIARY C905
A
C903 RIGHT GENERATOR CIRCUIT BREAKER
SEE D
APU/EXTERNAL POWER PANEL P34
B
POWER TERMINAL NUT (TIGHTENC904 TO 170-190RIGHT POUND-INCHES)BUS TIE BREAKER
SEE D
INBD
RIGHT GENERATOR POWER PANEL P32
CIRCUIT BREAKER C
D
Generator, Bus Tie, and Auxiliary Power Breaker Installations Figure 401
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757
MAINTENANCE MANUAL
CAUTION: DO NOT DISTURB THE INSTALLATION OF THE TIE BUS WIRES.
_______ DISTURBING THE TIE BUS WIRES CAN CAUSE DAMAGE TO THE AIRPLANE ELECTRICAL SYSTEM.
(b)
Remove auxiliary contact connector from breaker.
(c)
Remove the terminal cover.
(d)
Disconnect the leads and identify for installation.
(e)
Remove the circuit breaker.
TASK 24-22-03-424-006
3. Install the GCB, BTB, or the APB Circuit Breakers (Fig. 401)
____________________________________________________________
A. References
(1) AMM 24-22-00/201, Electrical Power - Control
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