TM 1-2840-252-23-3
TABLE 1. FAULT CODE INDEX (CONT)
Fault
Fault Description
Procedure
Code
Figure No.
D4
+10V Reference Hard Fault
120
D5
+/-15V Hard Fault
120
D6
+12V Reversionary or +/-12V Overspeed Soft Fault
119
D7
+5V Hard Fault
120
D8
Primary and Reversionary CJC Soft Fault
120
D9
+24V Regulator Soft Fault
120
DA
+5V Reversionary Soft Fault
119
DB
Reversionary System Soft Fault or Idle Check Soft Fault
119
DC
120
DD
Overspeed Check Soft Fault
119
DE
Primary and Reversionary 400Hz Resolver Reference Soft Fault
123
DF
Watchdog Timer Test Hard Fault
120
El
Primary and Reversionary T4.5 Sensor Soft Fault
124
E2
T1 Sensor Soft Fault
125
E3
N2A Sensor Soft Fault
126
E4
Primary and Reversionary N2B Sensor Hard Fault
127
E5
N2A/N2B Difference Soft Fault
128
F1
N1A Sensor Soft Fault
101
F2
Primary or Reversionary N1 B Sensor Hard Fault
102
F3
N1A/NIB Difference Soft Fault
103
F4
MV Potentiometer Hard or Soft Fault
104
F5
Wf/Stepcount Difference Hard Fault
105
F6
Primary and Reversionary PLA Potentiometer Soft Fault
106
F7
107
F8
Primary/Reversionary Solenoid Hard Fault
108
F9
109
FA
Start Fuel Solenoid Soft Fault
110
FB
Reversionary Step Count Soft Fault
111
None
Unable to Switch to Reversionary Mode
142
None
Unable to Switch to Primary Mode
143
None
System Toggles Between Primary and Reversionary Mode
144
None
Q Load Share Selected, Qs Not Matched
145
None
T4.5 Load Share Selected, T4.5 Not Matched
146
None
Ignition Relay Does Not Function
147
None
Bleed Band Does Not Function Properly
148
None
Engine Out Indicator (EOI) Does Not Illuminate During Normal Shutdown
149
None
No Observed Engine Speed Reduction During Overspeed Test
150
None
No Beeper Switch Response in Reversion
151
None
Unable to Perform Power Assurance Test (Results Not Indicated on Hex Display)
152
None
Moving ECL Lever to Stop Causes Increase in Engine Power
153
None
Moving ECL Lever to Flight Causes Engine Shutdown
154
None
Engine Out Indicator (EOI) Is Always Illuminated
155
None
F/R Lamp Does Not Illuminate When Reversion Is Selected
156
None
F/R Lamp Is Illuminated When Primary Is Selected
157
NOTE
If fault code displayed is not listed in Table 1, follow procedures in Figure 158.
G-6