TB 1--1520--237--20--219
b. Visually inspect the fire bottle wiring connections to verify that the colored marker sleeves and wire
numbers on the wires connected to each for bottle squib match the wire number and color sequences shown
in TM 1--1520--237--23--7, figure 12--2--2--2, sheet 4.
(1) If all fire bottle wire connections are marked correctly, proceed to para 8c.
(2) If there is a discrepancy in the wire marker sleeves.
(a) Enter a red diagonal // \ // status symbol on the DA Form 2408--13. The red diagonal
// \ // entry shall state "fire extinguisher wiring not marked IAW TM 1--1520--237--23".
c.
NOTE
If any of the following inspection procedures indicate a discrepancy, anno-
tate each discrepancy and continue with the inspection procedure.
NOTE
Paragraph references in the following steps refer to TM 1--1520--237--23.
(1) Setup.
(a) Turn of electrical power (para 1--6--13).
(b) Disconnect battery by removing cover and disconnecting both electrical connectors (para
9--4--34).
NOTE
Ensure wiring terminals are inside rubber boots and do not allow bare wires
to contact airframe.
(c) Disconnect all wire terminals form main and reserve fire extinguishing bottles (para
12--4--1).
(d) Ensure fire extinguishing circuit breaker on lower console circuit breaker panel is pushed
in.
(2) No. 1 main fire extinguishing bottle.
(a) Connect multimeter leads to wires marked W3163A16 and W3162A16N.
(b) Connect battery (para 9--4--34).
(c) Turn on electrical power (para 1--6--13).
(d) Pull engine controls quadrant #1 ENG EMER OFF lever (T--Handle) back.
(e) Place upper console fire extinguisher switch to main, then release to OFF.
NOTE
Multimeter should indicate 28 VDC when switch is placed to main.
(f) Push #1 ENG EMER OFF lever forward.
NOTE
When performing operational check, move engine (T--Handle) back or pull
APU (T--Handle) down as indicated by order, then place fire extinguisher
switch to position indicated. After completing each step, return all levers (T--
Handles) to the off position.
(g) Pull upper console APU (T--Handle) down. Visually check directional control valve.
3