TM 1-1520-238-T-5
8–50
8–10.
ENGINE INSTRUMENTS – MAINTENANCE OPERATIONAL CHECK (cont)
8–10
M68-064
Figure 8–34.
Pilot ENG OIL Indicator
Task
Result
h. On pilot dim/test panel (fig. 8–32), set DGT
OFF/NORM/TST switch to NORM and
rotate DIM control to midposition.
If pilot TGT, TORQUE, FUEL quantity , and NG
RPM% indicator digital readouts are blanked out, go
to paragraph 8–29.
i. Cover photocell on dim/test panel.
If pilot ENG OIL, TGT, TORQUE, FUEL quantity,
ENG–RTR RPM%, and NG RPM% indicator vertical
scale indicators do not dim, go to paragraph 8–30.
j. Shine light directly into photocell located on
dim/test panel.
If pilot ENG OIL, TGT, TORQUE, FUEL quantity,
ENG–RTR RPM%, and NG RPM% indicator vertical
scale indicators do not brighten, replace dim/test
panel (TM 1-1520-238-23).
k. Rotate the manual DIM control fully
counter–clockwise.
If pilot ENG OIL, TGT, TORQUE, FUEL quantity,
ENG–RTR RPM%, and NG RPM% indicator vertical
scale indicators do not dim, go to paragraph 8–31.
l. On the dim/test panel, (fig. 8–32) rotate the
manual DIM control fully clockwise.
If pilot ENG OIL, TGT, TORQUE, FUEL quantity,
ENG–RTR RPM%, and NG RPM% indicator vertical
scale indicators do not brighten, replace dim/test
panel (TM 1-1520-238-23).
m. Rotate DIM control to midposition. Check all
pilot engine instruments.
If pilot TGT indicator vertical display scale or digital
readouts do not indicate ambient temperature (5),
go to paragraph 8–32.
If pilot TORQUE indicator vertical scale indicators or
digital readouts do not indicate between 0 and 2%, go
to paragraph 8–33.
