TM 1-1520-238-T-5
7–146
7–52.
ONE ENGINE – WILL NOT MOTOR TO 22% NG
7–52
Tools:
Nomenclature
Part Number
Tool Kit, Aircraft
SC518099CLA01
Mechanic’s
Gage Pressure, Dial
GGG76
Indicating
(0-200 PSI)
Coupling Half
AN-6027
Personnel Required:
67R
Attack Helicopter Repairer
152FG
Maintenance Test Pilot
References:
TM 1-1520-238-T-4
TM 1-1520-238-23
TM 1-1520-238-CL
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
PAS inspection –
completed
TM 1-1520-238-23
Access provisions –
LN5 door opened
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.
NOTE
Pressure reading on gage may fluctuate
slightly. Use average reading.
1. Install dial pressure gage in utility air receptacle.
On pilot ECS panel, set ECS switch to ON and
TEMP switch to COLD. On pilot ANTI ICE panel,
set DEFOG switch to OFF. Start and operate
APU (TM 1-1520-238-23). On pilot power lever
quadrant, set the faulty engine START/OFF/IGN
OVRD switch to IGN OVRD. Check for 20 psi or
greater on dial pressure gage.
Is pressure 20 psi or greater?
YES
Refer to TM 1-1520-238-T-4 to
troubleshoot power plants.
NO
Go to step 2.
2. Set START/OFF/IGN OVRD switch to IGN
OVRD, check for ECS airflow from cockpit ECS
air ducts.
Is ECS airflow present?
YES
Refer to TM 1-1520-238-T-4 to
troubleshoot power plants.
NO
Go to paragraph 7–49.
END OF TASK
