What was found
ON TAKEOFF ROLL AUTOFEATHER ARMED/DISRMED WITH A/F SWITCH SELECTED. PERFORMED TAKEOFF ABORT AT 90 KIAS. INTERROGATED CDS - FAULT CODES NR1 402, 494 A&B (INTERNAL PEC FAULT, UPTRIM STATE MACHINE FAULT). R & R NR 1 PEC IAW AMM TASKS 61-20-36-000-801/ 400-801. C/W FUNCTIONAL TEST OF PEC CALIBRATION (TASK 61-20-36-720-801), ADJUSTMENT OF PEC SYNCHROPHASE TRIM (TASK 61-20-36-820-801), BOTH TEST OK, C/W H/S 61-0039 (APPLICATION OF HEAT SHRINK), C/W OPS TEST AFTER COMPONENT CHANGE (TASK 71-00-00-868-805, C/W MTCS 6710006 & 6710005 (POWER ASSURANCE CHECK) BOTH CHECKS OK. AUTOFEATHER/ UPTRIM TEST OK (TASK 61-20-00-710-801). RETURNED TO SERVICE.