SUBTASK 24-32-11-860-004
(3) If you installed the TRU 1, do this step:
(a) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 6 C00806 TRU 1
SUBTASK 24-32-11-860-005
(4) If you installed TRU 2, do this step:
(a) Remove the safety tag and close this circuit breaker:
Power Distribution Panel Number 2, P92
Row Col Number Name
A 4 C00807 TRU 2
SUBTASK 24-32-11-860-006
(5) If you installed TRU 3, do this step:
(a) Remove the safety tags and close these circuit breakers:
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
SUBTASK 24-32-11-410-001
(6) Close this access panel:
Number Name/Location
117A Electronic Equipment Access Door
G. Transformer Rectifier Unit (TRU) Installation Test
SUBTASK 24-32-11-860-007
(1) Do this task: (Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 24-32-11-700-001
(2) Do a test of the TRU as follows:
(a) If you replaced TRU 1, set the DC Meter Selector switch on the P5-13 Electrical Meters,
Battery and Galley Power module to the TR 1 position.
(b) If you replaced TRU 2, set the DC Meter Selector switch on the P5-13 Electrical Meters,
Battery and Galley Power module to the TR 2 position.
(c) If you replaced TRU 3, set the DC Meter Selector switch on the P5-13 Electrical Meters,
Battery and Galley Power module to the TR 3 position.
(d) Make sure the DC meter on the P5-13 panel shows this value:
1) DC VOLTS = 22-30
NOTE: The total current drawn is almost shared equally by all 3 TRUs.
(e) Make sure the amber TRU fail light on the P5-13 panel is off.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-32-11
Page 406
D633A101-ILF Jun 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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