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4-2.2 ENGINE ANTI-ICING SYSTEM WIRING DIAGRAM
4-2.4 ENGINE ANTI-ICING SYSTEM OPERATIONAL CHECK

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 4-2.3 ENGINE ANTI-ICING SYSTEM VISUAL CHECK 4-2.3 INITIAL SETUP Equipment Condition: Applicable Configurations: TM 55-1520-240-23: Without 43 land 74 Battery Disconnected Tools: Electrical Power Off Aircraft Mechanic's Tool Kit, Hydraulic Power Off NSN 5180-00-323-4692 Engine Work Platforms Open Materials: Engine Access Covers Open None Engine Air Inlet Screens Removed Engine Transmission Upper Fairings Opened Personnel Required: Medium Helicopter Repairer References: TM 55-1520-240-23 TASK RESULT 1.  Check ENG anti-ice switch (1). If switch (1) is loose or damaged, tighten or replace it as required. 2.  Check No. 1 engine anti-icing valve (2) and hose (3). If valve (2) is loose or damaged, tighten or replace it as required.  If electrical connector or wiring to valve is damaged, replace it.  If hose (3) is loose or damaged, tighten clamps or replace hose as required. 3.  Check No. 1 engine air inlet fairing (4). If fairing (4) is damaged, repair or replace it. 4.  Check No. 1 engine transmission fairing (5) and hose If fairing (5) is damaged, repair or replace it.  If hose (6) is (6). loose or damaged, tighten or replace it as required. 5.  Repeat steps 2 through 4 on No. 2 engine. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Close engine transmission upper  fairings. END OF TASK 4-34  Change 17







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