TM 1-1520-238-T-4
1–9
1–14
GENERAL PROCEDURES – SUMMARY (cont)
1–14
c. When completing troubleshooting you MUST:
(1) Repeat and complete the MOC.
(2) Secure all doors, panels and opened areas.
1–15.
TROUBLESHOOTING LINE REPLACEABLE UNITS (LRUs) OFF THE HELICOPTER
1–15
Troubleshooting beyond the scope of this volume for LRUs with built–in–test equipment is done at the EETF
QQ–290(V)2/MSM (TM 11-6625-3085-12).
1–16.
ELECTRONIC EQUIPMENT TEST FACILITY (EETF) TESTABLE LRUs
1–16
a. The following is a list of all the helicopter system LRUs which are covered in this volume and on which off
helicopter troubleshooting is accomplished using the EETF.
b. The LRUs are listed by chapter, system and name of unit for which on helicopter troubleshooting is
performed in this volume.
MANUAL
System
LRU Name
TM 1-1520-238-T-5
Instruments
Signal Data Converter
Engine Oil Pressure Indicator, Pilot
Gas Turbine Rpm (NG RPM%) Indicator, Pilot
Turbine Gas Temperature (TGT) Indicator, Pilot
Engine TORQUE Indicator, Pilot and CPG
Engine Rotor (ENG–RTR RPM%) Rpm Indicator, Pilot
and CPG
Fuel Quantity Indicator, Pilot
Selectable Digital Display, CPG
TM 1-1520-238-T-6
Electrical
Generator Control Unit 1
Generator Control Unit 2
Transformer/Rectifier 1
Transformer/Rectifier 2
Battery Charger
Engine Out/Rotor Rpm/Stabilator Warning Box
Caution/Warning Panel, Pilot
Caution/Warning Panel, CPG
Master Caution/Warning Panel, Pilot
Master Caution/Warning Panel, CPG
Multi–Channel Dimming Controller
Anti–Collision Light Power Supply
External Power Monitor
