FIRE EXTINGUISHING SYSTEM VISUAL CHECK

FIRE EXTINGUISHING SYSTEM WIRING DIAGRAM

FIRE EXTINGUISHING SYSTEM OPERATIONAL CHECK

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 12-3.3 FIRE EXTINGUISHING SYSTEM VISUAL CHECK 12-3.3 INITIAL SETUP References: TM 55-1520-240-23 Applicable Configurations: All Equipment Condition: TM 55-1520-240-23: Tools: Battery Disconnected Aircraft Mechanic's Tool Kit, Electrical Power Off NSN 5180-00-323-4692 Hydraulic Power Off Materials: None Personnel Required: Medium Helicopter Repairer TASK RESULT 1. Check FIRE EXT AGENT switch (1). If switch (1) is loose or damaged, tighten or replace it as required. 2. Check NO. 1 ENGINE and NO. 2 ENGINE fire handles If either fire handle (2) is loose or damaged, tighten or (2). replace it as required. 3. Check fire extinguisher (3). If either fire extinguisher (3) is loose, tighten it. If wiring to cartridges (4) is damaged, repair or replace it as required. 4. Read gage (5) on each fire extinguisher (3). If either gage (5) pressure reading is below following limits, replace fire bottle. Temperature Pressure -40°C (-40 F) 292 - 370 psi -29°C (-40°F) 320 - 400 psi -18°C (0°F) 355- 437 psi -7°C (19°F) 396 - 486 psi 4°C (39 F) 449 - 540 psi 15°C (59°F) 518- 618 psi 27°C (81 °F) 593 - 702 psi 30°C (100 F) 691 - 784 psi 52°C (126°F) 785- 902 psi FOLLOW-ON MAINTENANCE: None END OF TASK 12-56 Change 23

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