TM 1-1520-238-T-4
Change 1
6–167
6–84.
CPG LOW RPM ROTOR INDICATOR – DOES NOT LIGHT AT 93% OR LESS
6–84
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-T-6
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L140 fairing and
T250L, T250R,
T290L, T290R, L325,
and T325 access doors
open
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. Check for audio in headset.
Does low rpm audio warning exist?
YES
Go to step 2.
NO
Go to paragraph 6–83 to
troubleshoot pilot LOW RPM
ROTOR indicator.
2. CPG LOW RPM ROTOR indicator does not
light.
Is pilot LOW RPM ROTOR indicator lighted?
YES
Go to step 3.
NO
Go to paragraph 6–83 to
troubleshoot pilot LOW RPM
ROTOR indicator.
3. Check for open wire between P31–X and
(A326)TB1–10F.
Does open exist?
YES
Repair open wire.
Go to paragraph 6–81.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the CPG
caution/warning system.
END OF TASK
