TM
5-5420-226-20-1
DETAILED TROUBLESHOOTING
PROCEDURE
SUPPORT SYSTEM - FIRE EXTINGUISHERS
(Continued)
Symptom-52
Check first shot control valve for extension of pin
by using handle on control valve.
I
First
Technician
(Operator’s
Station)
1
rN0TE7
Do not install lead seals on interior
release mechanism at thm time.
\
m
!
l InstalI interior
release
mechanism
(page
20-26).
Second
Technician
(Front
of Crew
Compartment)
l Disconnect
both
control
valves
(page
20-2).
l Return
first shot
control
valve to SET
position,
if
not in SET
position,
by aligning
arrow
on shaft
with
arrow
on control
valve.
l Remove safety pin and rotate handle on valve
clockwise
until
it stops.
l Observe pin at the bottom
of the valve for extension
of 1/8
inch (.3175
cm).
Did the valve operate freely and extend the pin?
m
l Repair first shot control
valve (page 20-51).
l Installsafety wire and lead
seal on interiorrelease
r
I
CONTROL
VALVE
REMOVED
FOR
HANDLE
CONTROL
VALVE
SAFETY
PIN
VE
TA107245
4-556
.
