TM 55-1520-240-T
10-1.4 ENGINE FUEL SHUTOFF AND CROSSFEED VALVES
OPERATIONAL CHECK (Continued)
TASK
RESULT
CHECK CIRCUIT BREAKERS
1. Check that FUEL XFEED CONT circuit
breaker (1) is closed.
2. Check that ENGINE NO. 1 FUEL
SHUTOFF circuit breaker (2) is closed.
3. Check that ENGINE NO. 2 FUEL
SHUTOFF circuit breaker (3) is closed.
CHECK ENGINE FUEL SHUTOFF VALVES
4. Press and release No. 1 engine fuel valve
light (4).
5 Press and release No. 2 engine fuel valve
light (5).
6 Open ENGINE NO. 1 FUEL SHUTOFF
circuit breaker (2) and ENGINE NO. 2
FUEL SHUTOFF circuit breaker (3).
7 Set handles (6) on No 1 engine fuel valve
(7) and No 2 engine fuel valve (8) to CLSD.
8 Close ENGINE NO. 1 FUEL SHUTOFF
circuit breaker (2).
9. Close ENGINE NO. 2 FUEL SHUTOFF
circuit breaker (3).
Do not operate FIRE AGENT
switch while fire handles are out.
Fire bottles will discharge into
If XFEED CONT circuit breaker (1) is open, close it.
If it opens again, go to task 10-1.5.
If FUEL SHUTOFF circuit breaker (2) is open,
close it. If it opens again, go to task 10-1.6.
If FUEL SHUTOFF circuit breaker (3) is open,
close it. If it opens again, go to task 10-1.6.
Light (4) shall momentarily come on. If it does not,
go to task 10-1.7.
Light (5) shall momentarily come on. If it does not,
go to task 10-1.8.
If handle (6) cannot be moved to CLSD, replace
No. 1 or No. 2 engine fuel valve as required.
Handle (6) on No. 1 engine fuel valve (7) shall
move to OPEN. No. 1 engine fuel valve light (4)
shall come on and remain on until handle IS at
OPEN. If handle is not at OPEN or light comes on
and stays on, go to task 10-1.9. If Iight did not
come on but handle is at OPEN, go to task 10-
1.10. If light is on and handle is at OPEN, replace
No. 1 engine fuel valve.
Handle (6) on No. 2 engine fuel valve (8) shall
move to OPEN. No. 2 engine fuel valve light (5)
shall come on and remain on until handle IS at
OPEN. If handle is not at OPEN or light comes on
and stays on, go to task 10-1.9. If light did not
come on but handle is at OPEN, go to task 10-
1.10. If light is on and handle is at OPEN, replace
No. 2 engine fuel valve.
10-1.4
TASK
RESULT
10. Pull out No. 1 ENGINE fire handle (9).
Handle (6) on No. 1 engine fuel valve (7) shall
move to CLSD. No. 1 engine fuel valve light (4)
shall come on and remain on until handle is at
CLSD. If handle is not at CLSD or light (4) comes
on and stays on, go to task 10-1.11. If light did
not come on but handle is at CLSD, go to task 10-
1.10. If light is on and handle is at CLSD, replace
No. 1 engine fuel valve.
11. Pull out No. 2 ENGINE fire handle (10).
Handle (6) on No. 2 engine fuel valve (8) shall
move to CLSD. No. 2 engine fuel valve light (5)
shall come on and remain on until handle IS at
CLSD. If handle IS not at CLSD or light comes on
and stays on, go to task 10-1.11. If light (4) did
not come on but handle (6) is at CLSD, go to task
10-1.10. If light iS on and handle is at CLSD, re-
place No. 2 engine fuel valve.
12. Open ENGINE NO. 1 FUEL SHUTOFF
circuit breaker (2) and ENGINE NO. 2
FUEL SHUTOFF circuit breaker (3).
13 Set handles (6) on No. 1 engine fuel valve
(7) and No. 2 engine fuel valve (8) to OPEN.
14 Close ENGINE NO. 1 FUEL SHUTOFF
circuit breaker (2).
15. Close ENGINE NO. 2 FUEL SHUTOFF
circuit breaker (3).
16. Push in No. 1 ENGINE fire handle (9).
17. Push in No. 2 ENGINE fire handle (10).
CHECK CROSSFEED VALVES
18. Press and release left crossfeed fuel
valve light (11).
Handle (6) on No. 1 engine fuel valve (7) shall
move to CLSD. No. 1 engine fuel valve Iight (4)
shall come on and remain on until handle iS at
CLSD. If not, replace No. 1 engine fuel valve.
Handle (6) on No. 2 engine fuel valve (8) shall
move to CLSD. No. 2 engine fuel valve Iight (5)
shall come on and remain on until handle IS at
CLSD, If not, replace No. 2 engine fuel valve
Handle (6) on No 1 engine fuel valve (7) shall
move to OPEN. If not, replace No. 1 ENGINE fire
pull control.
Handle (6) on No. 2 engine fuel valve (8) shall
move to OPEN, If not, replace No. 2 ENGINE fire
pull control.
Light (11) shall momentarily come on. If it does
not, go to task 10-1.12.
engines.
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