TM 5-5420-226-20-1
Symptom-53
DETAILED
TROUBLESHOOTING
PROCEDURE
T
SUPPORT
SYSTEM
- FIRE EXTINGUISHERS
(Continued)
I
/
Check first shot control valve for extension of pin
by using handle on control valve.
.
IFirstTechnician(FrontCrewCompartment)
I
I
l Return
first shot control
valve to SET position.
I
Il Remove safety pin and rotate handle on valve
clockwise
until it stops.
I
Il Observe pin at the bottomof the valve for extension
of 1/8 inch (.3175
cm).
I
-l
Did the valve operate freely and extend the pin?
( )
l Repair first shot control
valve (page 20-51).
l Install safety
wire and lead
sealon first shot exterior
handle.
I
wCONTROLVALVESAFETYPIN
PIN=
REMOVED
FOR
CLARITY
CONTROL
VALVE
HA~DLE
SAFETY
PIN
OT
ALVE
TA107251
4-562