What was found
STAB OUT OF TRIM LIGHT DURING TAKEOFF ROLL DFCS CURRENT STATUS AND FAULT HISTORY ONLY SHOWED FAULT FOR MCP DISPLAY. PHOTO ATTACHED. NEEDS FURTHER TROUBLE SHOOTING. REF FIM 22-11 TASK 851. PERFORMED STAB TRIM BITE TEST. SEE PICTURES FOR FAULTS. PERFORMED FIM 22-12 TASK 809. CONNECTOR D1829 PINS 1 TO 2 AND 4 TO 5 WITHIN RANGE, WIRING BETWEEN FCC-A CONNECTOR D10135A AND NEUTRAL SHIFT SENSOR D1829 CHECKS OK, VOLTAGE AT D1829 PINS 1 TO 2 WITHIN RANGE. NEXT STEP PER FIM IS TO REPLACE M958 ELEVATOR NEUTRAL SHIFT SENSOR. RAR ELEVATOR NEUTRAL SHIFT SENSOR, REF AMM 22-11-14. SENSOR CONNECTORS REQUIRE SAFETY WIRE. "ELEVATOR NEUTRAL SHIFT SENSOR ADJUSTMENT AND TEST" AND "ELEVATOR NEUTRAL SHIFT SENSOR TEST" LEFT TO ACP, REF AMM 22-11-14-820-801 AND 22-11-14-710-801. TRANSMITTER, AI OFF 29-2211-9-9001 8656 ON 29-2211-9-9001 7014 TRANSMITTER, AI OFF 29-2211-9-9001 8656 ON 0000. REMOVED FCC-A AND B, DISCONNECTED BOTH NSS CONNECTORS. MEGGERED FROM FCC-A AND FCC-B CONNECTORS TO NSS CONNECTORS, PERFORMED CONTINUITY CHECKS FROM FCC-A AND FCC-B TO NSS CONNECTORS, SEE PICS FOR FINDINGS. CHECKS DONE REFERENCING ADD EMP:U411679 SEE LP 6684495 FOR ELEV POS SENS REPLACE, ELEVATOR SENSOR OPS CHECKS GOOD, FOUND MULTIPLE OTHER FAULTS DURING RELATED TESTING. FAULTS IN PICTURES ATTACHED. WHILE T/S FAULTS OBSERVED EXCESSIVE END PLAY OF THE MACH TRIM ACTUATOR ROD ENDS. REF MM 22-11-24-000-801, WITH HYD ON , YOKE MOVEMENT NOT SMOOTH TRAVEL THROUGH NEUTRAL ELEV POS (PITCH) IPC 22-11-24-01. SEE PICS SAFETY WIRED NSS CONNECTORS. COMPLETED NSS ADJUSTMENT, REF AMM TASK 22-11-14-820-801. PITCH SENSE TEST COMPLETED, REF AMM TASK 22-11-14-710-801, FAULTING CHANNEL A AND B ELEVATOR POSITION SENSORS. NEW LP CREATED FOR ADJUSTMENT OF ELEVATOR POSITION ADD EMP:U411679 WDM 22-12-31-1 AND WDM 22-12-41-1. FCC-A AND B REINSTALLED, NSS CONNECTORS REINSTALLED AND SAFETY WIRED. SENSORS. BITE LIBRARY CHAPTER 32, REF FIM 22-12 TASK 809, STILL FAULTING CHANNEL A. SWAPPED FCC-A AND FCC-B, NO CHANGE. FCC'S BACK IN ORIGINAL POSITIONS. REMOVED AND INSTALLED MACH TRIM ACTUATOR UP TO INCLUDING G(8) REF AMM 21-11-24 PARTS USED: 29-2221-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1507150 SN OFF 0041 DUE TO MACH TRIM ACTUATOR REPLACEMENT, ELEV POS SENSOR AND NUERAL SENSOR MAY NEED TO BE ADJUSTED ACTUATOR, MACH OFF 29-2221-9-0001 0041 ON 0000 ACTUATOR, MACH OFF 29-2221-9-0001 0041 ON 42-2211-9-0001 1405 RE-ADJUSTED NSS PER AMM 22-11-14 AND ELEV POS SENSOR PER AMM 22-11-30. ACCOMPLISHED DFCS TEST 32. ALL SENSORS ARE WITHIN TOLERANCE AND TEST 32 PASSED. ORIGINAL SUBMISSION DATE: 12/29/2023