TM 1-1520-238-T-5
8–47
8–10.
ENGINE INSTRUMENTS – MAINTENANCE OPERATIONAL CHECK (cont)
8–10
Task
Result
d. On pilot dim/test panel (fig. 8–32), set and
hold DGT OFF/NORM/TST switch to TST.
Check all pilot engine instrument digital
readouts and vertical scale indicators.
If any single pilot engine instrument vertical display
lamp does not light for three seconds, replace the
applicable indicator (TM 1-1520-238-23).
If all pilot engine instruments do not indicate full scale
or digital 888, go to paragraph 8–17.
If all pilot engine instruments have every other vertical
display lamp not lighted, go to paragraph 8–17.
e. Hold DGT OFF/NORM/TST switch to TST.
Check AUX PWR indicator.
If AUX PWR indicator does not light, replace lamp
(TM 1-1520-238-23). If lamp still does not light, go to
paragraph 8–16.
f. Hold DGT OFF/NORM/TST switch at TST.
Check all pilot engine instruments.
If pilot TGT indicator (fig. 8–33) does not indicate full
scale or show digital 888, go to paragraph 8–18.
If pilot TGT indicator does not show digital readouts,
go to paragraph 8–18.
If pilot TGT indicator vertical scale indicators have
every other lamp not lighted, go to paragraph 8–18.
If pilot TORQUE indicator (fig. 8–33) does not indicate
full scale or show digital 888, go to paragraph 8–19.
If pilot TORQUE indicator does not show digital
readouts, go to paragraph 8–19.
If pilot TORQUE indicator vertical scale indicators
have every other lamp not lighted, go to
paragraph 8–19.
If pilot FUEL quantity indicator (fig. 8–33) does not
indicate full scale or show digital 888, go to
paragraph 8–20.
If pilot FUEL quantity indicator does not show digital
readouts, go to paragraph 8–20.
