TM 1-1520-238-T-5
8–54
8–10.
ENGINE INSTRUMENTS – MAINTENANCE OPERATIONAL CHECK (cont)
8–10
Task
Result
(Step v. cont)
If CPG SDD panel edge–lighting does not light,
replace lamp (TM 1-1520-238-23). If lamp still does
not light, go to paragraph 8–55.
If CPG TORQUE indicator edge–lighting does not
light, replace lamp (TM 1-1520-238-23). If lamp still
does not light, go to paragraph 8–56.
If CPG ENG–RTR RPM% indicator edge–lighting
does not light, replace lamp (TM 1-1520-238-23). If
lamp still does not light, go to paragraph 8–57.
If CPG dim/test panel edge–lighting does not light,
replace lamp (TM 1-1520-238-23). If lamp still does
not light, go to paragraph 8–58. (Helicopters with
dim/test panel installed).
w. On CPG INTR LT panel (fig. 8–36), rotate
the INST control switch to OFF.
x. On pilot EXT LT/INTR LT panel (fig. 8–37),
rotate INST control switch to BRT. Check all
pilot engine instruments.
If dim/test panel, FUEL quantity and ENG OIL
indicators do not light, replace lamp
(TM 1-1520-238-23). If lamp still does not light, refer
to TM 1-1520-238-T-6 to troubleshoot pilot
edge–lights.
If TORQUE, TGT, NG RPM% and ENG–RTR RPM%
indicators do not light, replace lamp
(TM 1-1520-238-23). If lamp still does not light, refer
to TM 1-1520-238-T-6 to troubleshoot pilot
edge–lights.
If pilot dim/test panel edge–lighting does not light,
replace lamp (TM 1-1520-238-23). If lamp still does
not light, go to paragraph 8–59.
If pilot TGT indicator edge–lighting does not light,
replace lamp (TM 1-1520-238-23). If lamp still does
not light, go to paragraph 8–60.
