2) DC AMPS = 0
(k) Make sure the TR UNIT light on the P5-13 panel comes on.
(l) Set the BUS TRANS switch on the P5-4 panel to the OFF position.
(m) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 0
2) DC AMPS = 0
(n) Set the BUS TRANS switch on the P5-4 panel to the AUTO position.
(o) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 22-30
2) DC AMPS = 0
(p) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 6 C00806 TRU 1
(q) Make sure the TR UNIT light on the P5-13 panel goes off.
(r) Set the DC Meter Selector Switch on the P5-13 panel to the TR 2 position.
(s) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22–30
(t) Open this circuit breaker and install safety tag:
Power Distribution Panel Number 2, P92
Row Col Number Name
A 4 C00807 TRU 2
(u) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 22–30
2) DC AMPS = 0
(v) Make sure the TR UNIT light on the P5-13 panel comes on.
(w) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 2, P92
Row Col Number Name
A 4 C00807 TRU 2
(x) Make sure the TR UNIT light on the P5-13 panel goes off.
SUBTASK 24-31-00-710-003
(2) Do a check of the TR3 Transfer Relay as follows:
(a) Set the DC Meter Selector Switch on the P5-13 panel to the TR 3 position.
(b) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22-30
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-31-00
Page 502
D633A101-ILF Oct 15/2014
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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