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INSTALL DC BUS  TIE  RELAY (Continued)
REMOVE  DC  POWER  SUPPLY (TR) FAIL RELAY (Continued)

TM-55-1520-240-23-7 CH-47D Heilcopter Manual
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TM  55-1520-240-23-7 9-16 REMOVE  DC  POWER  SUPPLY  (TR) FAIL RELAY 9-16 INITIAL  SETUP Applicable  Configurations: All Tools: Electrical  Repairer’s Tool  Kit, NSN 5180-00-323-4915 Materials: Paper  Tags  (E264) Tape  (E385) Personnel  Required: Aircraft  Electrician Equipment  Condition: Battery Disconnected  (Task  1-39) Electrical  Power  Off Hydraulic  Power Off NOTE Procedure  is  similar  to  remove  No. 1  or No.   2  dc  power  supply TR fail relay.   Differences  are  noted  in  text. Removal  of  No.  1  relay shown  here. 1. Release  six  fasteners (1) in  upper circuit  breaker panel  (2).   Open  panel. 9-54







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