TM 1-1520-238-T-4
4–55
4–12.
POWER PLANTS – MAINTENANCE OPERATIONAL CHECK (ENGINE 1) (cont)
4–12
ENG 1
INDICATOR
ENG 2
INDICATOR
M58-057
Figure 4–32.
CPG Caution/Warning Panel
M58-054
EMERG PWR
INDICATOR
CKT A SWITCH
CKT B SWITCH
Figure 4–33.
Pilot EMERG PWR CHK OVSP TEST Panel
Task
Result
k. On CPG master caution/warning panel
(fig. 4–31), press and hold PRESS TO TEST
indicator. Check that ENGINE CHOP
indicator is lighted.
If ENGINE CHOP indicator is not lighted, replace
lamp (TM 1-1520-238-23). If lamp still does not light,
refer to TM 1-1520-238-T-6 to troubleshoot CPG
caution/warning system.
l. On pilot instrument panel (fig. 4–34) dim test
panel, place DGT OFF/NORM/TST switch to
TST. Check that NG, TGT, ENG–RTR,
TORQUE and ENG OIL indicators show full
scale readings for 3 seconds. Check that
digital displays show 888.
If NG, TGT, ENG–RTR, TORQUE and ENG OIL
indicators do not go to full scale for 3 seconds or do
not show 888, refer to TM 1-1520-238-T-5 to
troubleshoot engine instruments.
m. On CPG instrument panel (fig. 4–35) dim
test panel, place DGT OFF/NORM/TST
switch to TST. Check that NG, TGT,
ENG–RTR, TORQUE and ENG OIL
indicators light and/or that LEFT/FWD and
RIGHT/AFT digital displays show 888 on
CPG selectable digital display (SDD) panel.
If NG, TGT, ENG–RTR, TORQUE and ENG OIL
indicators do not light or CPG SDD panel do not show
888, refer to TM 1-1520-238-T-5 to troubleshoot
engine instruments.
