TB 1--1520--237--20--219
NOTE
Sound of directional control valve being energized should be heard and
position indicator should pivot.
(h) Place fire extinguisher switch to main, then release to OFF.
NOTE
Multimeter should indicate 28 VDC when switch is placed to main.
(i) Push APU (T--Handle) up while a second individual is observing directional control valve.
NOTE
Sound of directional control valve de--energizing should be heard and posi-
tion indicator should return to initial position.
(j) Turn of all electrical power and disconnect battery (para 1--6--13).
(k) At left hand relay panel, located and disconnect P243 and P902. Install and insulated
jumper wire between P243--Z and P902--G (lower case "G" ) to simulate actuation of impact switch.
(l) Connect battery (para 9--4--34).
NOTE
Multimeter should read 28 VDC.
(m) Disconnect battery (para 9--4--34), remove jumper wire from P243 and P902, then recon-
nect P243 and P902 to left hand relay panel.
(n) Disconnect multimeter leads from no. 1 main wires W3163A16 and W3162A16N.
(3) No. 2 main fire extinguishing bottle.
(a) Connect multimeter leads to wires labeled W3164A20 and W3165A20N.
(b) Connect battery (para 9--4--34).
(c) Turn on electrical power (para 1--6--13).
(d) pull engine controls quadrant #2 ENG EMER OFF level (T--Handle) back.
(e) Place fire extinguisher switch to main, then release to OFF.
NOTE
Multimeter should indicate 28 VDC when switch is placed to main.
(f) Push #2 ENG EMER OFF lever forward.
(g) Turn of all electrical power and disconnect battery (para 1--6--13).
(h) Disconnect multimeter leads from no. 2 main wires W3164A20 and W3165A20N.
(4) No.1 reserve fire extinguishing bottle.
(a) Connect multimeter leads to wires labeled W3167A20 and W3166A20N.
(b) Pull engine controls quadrant #1 ENG EMER OFF lever (T--Handle) back).
(c) Place fire extinguisher switch to reserve, then release to OFF.
NOTE
Multimeter should indicate 28 VDC when switch is place to reserve.
(d) Push #1 ENG EMER OFF lever (T--Handle) forward.
(e) Pull upper console APU (T--Handle) down. Visually check directional control valve.
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