Chapter 1. INTRODUCTION - TM-55-4920-431-130006
Table 1-1. Tools and Test Equipment
Table 1-2. Expendable Supplies and Materials List
MAINTENANCE FORMS AND RECORDS
Section II. EQUIPMENT DESCRIPTION AND DATA
Section III. TECHNICAL PRINCIPLES OF OPERATION - TM-55-4920-431-130011
Chapter 2. OPERATING INSTRUCTIONS - TM-55-4920-431-130012
Figure 2-1. Controls and Indicators
Table 2-1. Controls and Indicators
Table 2-1. Controls and Indicators - continued
Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES - TM-55-4920-431-130016
Table 2-2. Operator Preventive Maintenance Checks and Services
Section IV. OPERATION UNDER USUAL CONDITIONS
Figure 2-2. Connecting Tester for Use in Aircraft
FIgure 2-3. Connecting Tester for Bench-Check of ESU
Chapter 3. AVUM MAINTENANCE INSTRUCTIONS
TROUBLESHOOTING PROCEDURE 1. MAIN POWER LIGHT DOES NOT ILLUMINATE
Section III. MAINTENANCE PROCEDURES - TM-55-4920-431-130024
Chapter 4. AVIM (CRC) MAINTENANCE INSTRUCTIONS
Table 4-1. Preventive Maintenance Checks and Services
TROUBLESHOOTING PROCEDURE 1. METER DOES NOT INDICATE ENGINE SPEED
TROUBLESHOOTING PROCEDURE 2. METER DOES NOT INDICATE TEMP
TROUBLESHOOTING PROCEDURE 3. MAIN POWER LED INDICATOR CR2 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE 4. MAIN LED INDICATOR CR3 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 5. READY TO LOAD LED INDICATOR CR4 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 6 START COMMAND LED INDICATOR CR5 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 7. START FUEL LED INDICATOR CR8 DOES START FUEL LED INDICATOR CR8 DOES
MAIN FUEL LED INDICATOR CR9 DOES NOT COME ON
MAX FUEL LED INDICATOR CR10 DOES NOT COME ON
REMOTE LED INDICATOR CR13 DOES NOT COME ON
Section IV. MAINTENANCE PROCEDURES
Test LED Indicators
Test Harnesses
Analog Converter Replacement.
Switch Replacement.
HARNESS REPAIR
Verification
Figure 4-1. Test Setup for Verification
Verification - continued
Table 4-2. SPEED Meter Verification
Chapter 5. PARTS LIST
Figure 5-1. APU Tester
Repair Parts List - TM-55-4920-431-130050
FIgure 5-2. Front Panel Assembly
Repair Parts List - TM-55-4920-431-130052
Figure 5-3. Mounting Plate Assembly
Repair Parts List - TM-55-4920-431-130054
Figure 5-4. Instrument Case
Repair Parts List - TM-55-4920-431-130056
Appendix A. MAINTENANCE ALLOCATION CHART
Aviation Intermediate Maintenance (AVIM)
Definitions. - TM-55-4920-431-130059
Functional Groups
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130061
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130062
Setion III. Tools and Testr Equipment Requirements - TM-55-4920-431-130063
Section IV. REMARKS - TM-55-4920-431-130064
Appendix B. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130065
USE OF THE MAINTENANCE ALLOCATION CHART.
DEFINITIONS. - TM-55-4920-431-130067
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130068
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130069
Setion III. Tools and Testr Equipment Requirements - TM-55-4920-431-130070
Section IV. REMARKS - TM-55-4920-431-130071
TM-55-4920-431-13 Auxiliary Power Unit Electronic Sequence Unit Multi-Purpose Test Set NSN 4920-01-121-0605 Manual
Table 1-1. Tools and Test Equipment
Table 1-2. Expendable Supplies and Materials List
MAINTENANCE FORMS AND RECORDS
Section II. EQUIPMENT DESCRIPTION AND DATA
Section III. TECHNICAL PRINCIPLES OF OPERATION - TM-55-4920-431-130011
Chapter 2. OPERATING INSTRUCTIONS - TM-55-4920-431-130012
Figure 2-1. Controls and Indicators
Table 2-1. Controls and Indicators
Table 2-1. Controls and Indicators - continued
Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES - TM-55-4920-431-130016
Table 2-2. Operator Preventive Maintenance Checks and Services
Section IV. OPERATION UNDER USUAL CONDITIONS
Figure 2-2. Connecting Tester for Use in Aircraft
FIgure 2-3. Connecting Tester for Bench-Check of ESU
Chapter 3. AVUM MAINTENANCE INSTRUCTIONS
TROUBLESHOOTING PROCEDURE 1. MAIN POWER LIGHT DOES NOT ILLUMINATE
Section III. MAINTENANCE PROCEDURES - TM-55-4920-431-130024
Chapter 4. AVIM (CRC) MAINTENANCE INSTRUCTIONS
Table 4-1. Preventive Maintenance Checks and Services
TROUBLESHOOTING PROCEDURE 1. METER DOES NOT INDICATE ENGINE SPEED
TROUBLESHOOTING PROCEDURE 2. METER DOES NOT INDICATE TEMP
TROUBLESHOOTING PROCEDURE 3. MAIN POWER LED INDICATOR CR2 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE 4. MAIN LED INDICATOR CR3 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 5. READY TO LOAD LED INDICATOR CR4 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 6 START COMMAND LED INDICATOR CR5 DOES NOT COME ON
TROUBLESHOOTING PROCEDURE NO. 7. START FUEL LED INDICATOR CR8 DOES START FUEL LED INDICATOR CR8 DOES
MAIN FUEL LED INDICATOR CR9 DOES NOT COME ON
MAX FUEL LED INDICATOR CR10 DOES NOT COME ON
REMOTE LED INDICATOR CR13 DOES NOT COME ON
Section IV. MAINTENANCE PROCEDURES
Test LED Indicators
Test Harnesses
Analog Converter Replacement.
Switch Replacement.
HARNESS REPAIR
Verification
Figure 4-1. Test Setup for Verification
Verification - continued
Table 4-2. SPEED Meter Verification
Chapter 5. PARTS LIST
Figure 5-1. APU Tester
Repair Parts List - TM-55-4920-431-130050
FIgure 5-2. Front Panel Assembly
Repair Parts List - TM-55-4920-431-130052
Figure 5-3. Mounting Plate Assembly
Repair Parts List - TM-55-4920-431-130054
Figure 5-4. Instrument Case
Repair Parts List - TM-55-4920-431-130056
Appendix A. MAINTENANCE ALLOCATION CHART
Aviation Intermediate Maintenance (AVIM)
Definitions. - TM-55-4920-431-130059
Functional Groups
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130061
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130062
Setion III. Tools and Testr Equipment Requirements - TM-55-4920-431-130063
Section IV. REMARKS - TM-55-4920-431-130064
Appendix B. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130065
USE OF THE MAINTENANCE ALLOCATION CHART.
DEFINITIONS. - TM-55-4920-431-130067
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130068
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-431-130069
Setion III. Tools and Testr Equipment Requirements - TM-55-4920-431-130070
Section IV. REMARKS - TM-55-4920-431-130071
TM-55-4920-431-13 Auxiliary Power Unit Electronic Sequence Unit Multi-Purpose Test Set NSN 4920-01-121-0605 Manual
