What was found
REJECTED TAKE OFF, DUE TO NR1 ENGINE EVM COMPRESSO AMBER BOX ILLUMINATED AT APPROX 5.0 THEN EXTINGUISHED, FOLLOWED BY ILLUMINATION OF THE NR 1 ENGINE EVM TURBINE AMBER BOX AT APPROX 4.4. NO PHYSICAL VIBRATION. PER FIM 77-32 INSPECTED NR 1 ENG FOR DAMAGE. NO PROBLEMS FOUND, ALL CHECKED OK. SUSPECT BAD EVM BOX. R & R EVM COMPUTER PER MM 77-32-02-4-1 AND TESTED PER MM 77-32-02-5-1. NO FAULTS OCCURED. ACCOMPLISHED ENGINE VIBRATION SURVEY, ADJUSTMENT TESTED PER MM 71-00-00-5-1 & JRH AND FOUND AT GROUND IDLE INDICATION, COMPRESSOR 0.4, TURBINE 0.3, MPA SETTINGS TURBINE READS 0.5 & COMPRESSOR 0.2. WHEN RETARDING THROTTLES TO IDLE, BOTH TURBINE AND COMPRESSOR GO ANYWHERE FROM 0.0-3.4 UNITS. NO VIBRATION FELT DURING TEST. PERFORMED NR 1 ENGINE RUN PER JRH & EVM SHOWED COMPRESSOR 0.2, TURBINE 0.2 AT IDLE, COMPRESSOR 0.1, TURBINE 0.8 AT N2 80%. DURING ADVANCEMENT OF THROTTLE, TURBINE MOMENTARY SHOWED 2.3 AT N2 75%. CHECKED WIRING WITH WIRE SHAKE, ENGINE SIDE BETWEEN P1-8163 & R5-1091A IAW WDM 77-32-01, FOUND NORMAL & NO SHORTED TO GROUND. R & R CORE VIBRATION ACCELEROMETER PER MM 77-32-03-4. RAN EVM R-T-S TEST IAW MM 77-32-02-5 & TEST PASSED. RAN NR 1 ENGINE AT IDLE & N2 80%. EVM SHOWED COMPRESSOR 0.2, TURBINE 0.3 AT IDLE & COMPRESSOR 0.3, TURBINE 0.5 AT N2 80%.