TM 55-1520-240-T
9-2.4
AC POWER SYSTEM OPERATIONAL CHECK (Continued)
9-2.4
TASK
RESULT
12.
Set GEN NO. 2 switch (16) to TEST.
NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsule
(18) shall go out. If it does not, check ground stud GD102
(STA 594, WL 58, RBL 8), for security and good bond to
structure. If capsule (18) still does not go out, go to task
9-2.10.
13.
Set GEN NO. 2 switch (16) to ON.
NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsule
(18) shall stay out. If capsule comes on, go to task 9-2.11.
14.
Set GEN NO. 1 switch (15) to OFF.
NO. 1 GEN OFF (Without 74 ) GEN 1 (With 74) capsule
(17) shall come on. NO. 1 RECT OFF and NO. 2 RECT
OFF (Without 74) RECT 1 and RECT 2 (With 74)
capsules (13 and 14) shall stay out. If they come on, go to
task 9-2.12.
15.
Set GEN NO. 1 SWITCH (15) to ON.
16.
Have pilot start apu and switch on apu generator.
17.
Set GEN NO. 1 switch (15) to OFF.
NO. 1 GEN (Without I) GEN 1 (With 74) b capsule shall
come on. NO. 1 RECT OFF (Without 74) RECT 1 (With
74) capsule shall stay out. If it comes on, go to task
9-2.15.
18.
Set GEN NO. 1 switch (15) to ON.
19.
Set GEN NO. 2 switch (16) to OFF.
NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsule
shall come on. NO. 2 RECT OFF (Without 74) RECT 2
(With 74) capsule shall stay out. If it comes on, go to task
9-2.15.
20.
Have pilot shutdown engines.
NOTE
The following steps can only be performed with an
external ac power source.
21.
Connect a 115/200VAC Hz AC external power source
EXT PWR capsule (20) shall come on. If it does not, go to
to receptacle (19). Turn on power source.
task 9-2.13. NO. 1 RECT OFF and NO. 2 RECT OFF
(Without 74) RECT 1 and RECT 2 (With 74) capsules
(13 and 14) shall go out. If they do not, go to task 9-2.14.
22.
Turn off and disconnect power source.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery Disconnected
Electrical Power Off
END OF TASK
9-66 Change 19
