TM 1-1520-238-T-7
Change 5
10–149
10–47. FUEL QUANTITY INDICATION/TRANSFER – MAINTENANCE OPERATIONAL
10–47
CHECK (cont)
M70-085
RIGHT / AFT
DIGITAL
READOUT
LEFT / FWD
DIGITAL
READOUT
TEST
PUSHBUTTON
Figure 10–65.
CPG Selectable Digital Display
NOTE
The test circuit automatically opens (lamps out) two seconds after being switched
on to prevent heat damage to digital instrument light segments. To recycle test
mode, release switch, wait one second, and reset TST switch to TST.
Task
Result
e. On pilot dim/test panel (fig. 10–66), set DGT
OFF/NORM/TST switch to TST. Check pilot
FUEL quantity indicator (fig. 10–63). All
lamp segments are lighted (2 seconds), and
digital readout is 888.
If all lamp segments are not lighted, replace lamps
(TM 1-1520-238-23). If lamps are still not lighted,
and/or digital readout is not 888, refer to
TM 1-1520-238-T-5 to troubleshoot engine
instruments.
M70-086
DGT OFF/NORM/
TST SWITCH
Figure 10–66.
Dim/Test Panel
