TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT
(CONT)
*c. Interior, exterior, and annunci-
ator lights - Check.
*d. Fuel control panel - Check the
standby pumps and firewall
valves as follows to insure that
they are powered through the
essential bus:
C39
(1) Battery switch - OFF.
(2) Standby pump circuit
breakers (left and right) -
Pull.
(3) Firewall shutoff valve cir-
cuit breakers (left and
right) - Pull.
(4) Firewall shutoff valve
switches - Close (listen for
operation).
(5) Standby pump switches -
ON, then listen for opera-
C41
(6)
(7)
(8)
tion.
Battery switch - ON. Check
#1 FUEL PRESS and #2
FUEL PRESS annunciator
lights illuminated.
Firewall shutoff valve
switches - OPEN. Check #1
F U E L P R E S S a n d # 2
FUEL PRESS annunciator
lights extinguished.
Standby pump switches -
OFF.
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