TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT
(CONT)
*c.
Interior, exterior, and annunciator lighted-Check.
C39
*d
Fuel control panel Check the standby pumps
and firewall valves as follows to insure that they
are powered through the essential bus:
(1)
Battery switch OFF.
(2)
Standby pump circuit breakers (left and right)
Pull
(3)
Firewall shutoff valve circuit breakers (left and
night) Pull.
(4)
Firewall shutoff valve switches Close (listen for
operation)
(5)
Standby pump switches ON, then listen for operation.
C41
(6)
Battery switch ON Check #1 FUEL PRESS and
#2 FUEL PRESS annunciator lights illuminated
(7)
Firewall shutoff valve switches OPEN. Check #1
FUEL PRESS and #2 FUEL PRESS annunciator
lights extinguished
(8)
Standby pump switches OFF
2-2
