TRANSFORMER RECTIFIER UNIT - MAINTENANCE PRACTICES
1. General
A. This procedure has these tasks:
(1) Transformer Rectifier Unit Deactivation.
(2) Transformer Rectifier Unit Activation.
TASK 24-32-11-040-801
2. Transformer Rectifier Unit - Deactivation
(Figure 201)
A. General
(1) This procedure removes electrical power to the Transformer Rectifier Unit.
B. Location Zones
Zone Area
117 Electrical and Electronics Compartment - Left
118 Electrical and Electronics Compartment - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Access Panels
Number Name/Location
117A Electronic Equipment Access Door
D. Procedure
SUBTASK 24-32-11-010-006
(1) Open this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 24-32-11-860-015
WARNING
BE CAREFUL WHEN YOU OPEN OR CLOSE CIRCUIT BREAKERS IN THE
P91 AND P92 PANELS WHILE THE PANELS HAVE POWER. ELECTRICAL
SHOCK CAN CAUSE INJURIES TO PERSONNEL.
(2) Open these circuit breakers and install safety tags:
Power Distribution Panel Number 1, P91
Row Col Number Name
A 4 C00941 TRU 3 ALTN
A 6 C00806 TRU 1
Power Distribution Panel Number 2, P92
Row Col Number Name
A 4 C00807 TRU 2
E. Transformer Rectifier Unit - Tryout
NOTE: This tryout is to make sure the Transformer Rectifier Units are in a zero energy state.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-32-11
Page 201
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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