TM 1-1520-238-T-4
Change 1
6123
654.
HOD XMN 2 READING DISPLAYS LOW OIL PRESSURE
654
Tools:
Nomenclature
Part Number
Tool Kit, Aircraft
SC518099CLA01
Mechanics
Tool Kit, Electrical
SC518099CLA06
Repairers
Personnel Required:
67R
Attack Helicopter Repairer
68X
Armament/Electrical Systems Repairer
152FG
Maintenance Test Pilot
References:
TM 1-1520-238-23
TM 1-1520-238-CL
Equipment Conditions:
Ref
Condition
TM 1-1520-238-CL
Engine 2 operating
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 HOD display for XMN 2 oil temperature
reading.
Is reading 140 C or higher?
YES
Go to paragraph 653 to
troubleshoot HOD XMN 2
display.
NO
Go to step 2.
2. Check pilot caution/warning panel OIL PSI MAIN
XMSN 2 indicator.
Is indicator lighted?
YES
Go to paragraph 656 to
troubleshoot OIL PSI MAIN
XMSN 2 indicator.
NO
Go to step 3.
3. Check pilot caution/warning panel OIL HOT
MAIN XMSN 2 indicator.
Is indicator lighted?
YES
Go to paragraph 670 to
troubleshoot OIL HOT MAIN
XMSN 2 indicator.
NO
Go to step 4.
4. Check HOD display for XMN 2 oil pressure
reading.
Is reading oil pressure 35 LB or lower?
YES
Replace main transmission 2
primary lube pump
(TM 1-1520-238-23).
NO
Main transmission 2 oil pressure
is not critically low. Go to
paragraph 613.
END OF TASK