(c) Open this circuit breaker and install safety tag:
Power Distribution Panel Number 2, P92
Row Col Number Name
A 6 C00808 TRU 3
(d) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22-30
(e) Open this circuit breaker and install safety tag:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 4 C00941 TRU 3 ALTN
(f) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = Less than 10
(g) Make sure the TR UNIT light on the P5-13 panel comes on.
(h) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 2, P92
Row Col Number Name
A 6 C00808 TRU 3
(i) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22-30
(j) Make sure the TR UNIT light on the P5-13 panel goes off.
(k) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 4 C00941 TRU 3 ALTN
SUBTASK 24-31-00-710-002
(3) Do a check of the battery bus transfer relays as follows:
(a) Set the DC Meter Selector Switch on the P5-13 panel to the BAT position.
(b) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 30 ± 3
(c) Set the DC Meter Selector Switch on the P5-13 panel to the BAT BUS position.
(d) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22-30
(e) Open these circuit breakers and install safety tags:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 4 C00941 TRU 3 ALTN
Power Distribution Panel Number 2, P92
Row Col Number Name
A 6 C00808 TRU 3
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-31-00
Page 503
D633A101-ILF Oct 15/2014
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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