TM 1-1510-224-10 Table 3-4.  Digital Flight Control System Error Codes FZ-450 Error Codes Err 00 Processor Reset/Lost Processor Err 35 Trim Test Fail 01 +15 Volt DC Fail 36 Lateral Accelerometer Fail 02 -15 Volt DC Fail 50 Aircraft ID Fail 03 -5 Volt DC Fail 51 Abbreviated Trim Test Fail 04 +10 Volt DC Fail 52 DG Fail 05 LVC Monitor Fail 53 Hardware Fail 06 Sawtooth Monitor Fail 54 VG No. 1 Fail 07 26 VAC Reference Fail 55 VG No. 2 Fail 08 Watchdog Monitor Fail 56 Pitch Current Monitor Fail 09 Interrupt Register Fail 57 Roll Current Monitor Fail 10 A/D End-Around Fail 59 Vertical 11 EEPROM Full Gyro Comparison Fail 12 PROM Checksum Fail 60 Pitch Servo Loop Fail 13 RAM Read/Write Fail 61 Roll Servo Loop Fail 14 CPU Register Fail 63 Servo Fail 15 CPU Instruction Set Fail 64 Excessive 16 RAM Continuous Fail Lateral Acceleration 17 Essential RAM Checksum Fail 65 Pitch Trim Fail 18 Continuous 66 Excessive A/D and D/A Test Fail Vertical Acceleration 19 Continuous PROM Test Fail 67 Excessive Roll Rate 20 Ticket Fail 68 Wrong Trim Polarity 21 CPU Fail 69 RG Valid Fail 30 Pitch Magnitude 70 26 VAC Cross-side Rate Limiter Fail Reference Fail 31 Roll Magnitude 71 AP Disconnect PB Fail Rate Limiter Fail 72 Turn Knob Detent Fail 33 Roll Torque Fail 73 Manual Trim Input Fail 34 Pitch Torque Fail BT0341 3-42