TM 5-5420-226-20-1
P r e v e n t i v e M a i n t e n a n c e C h e c k s a n d S e r v i c e s f o r M 4 8 A 5 A V L B H u l l -
Item
No.
47
Interval
Semiannual
Location
Item to
Check/Service
Fixed Fire
Extinguisher
System
- Continued
NOTE
C o n t i n u ed
Procedure
Not Fully Mission
Capable if:
If multimeter indicates 18 to 30
volts dc for less than 10 seconds in
duration, fire extinguisher fuel shut-
off relay is defective. If no voltage is
observed, troubleshoot fire extin-
guisher fuel shutoff switch circuitry
(page 4-568).
Do not disconnect multimeter (multimeter is needed for step 9).
step 7
WARNING
Relieve system of high pressure (800-1800 psi) gas slowly. Gloves and
eye protection must be worn. Avoid breathing vapors. Failure to
comply may result in injury or death to personnel.
NOTE
All personnel must be completely familiar with steps 7 through 11
before proceeding. Steps must be performed within duration of
cylinders discharge (approximately 9 to 15 seconds).
Complete steps 7 through 11 before attempting repair or retest.
Person No. 1 pull inside release han-
die, announce firing
back in.
and push handle
Change 6
3-81
