What was found
AFTER LEVELING OFF & REDUCING POWER BELOW 79 PERCENT N1 NOTICED THE FOLLOWING INDICATIONS ON RT ENG, FF 1150-1210, N1 70-70.6, N2 83-83.5. ALL INDICATIONS NORMAL ABOVE 79 PERCENT N1, COMPLIED WITH QRH, SPEED SWITCH OFF, NO EFFECT ON INDICATION, AT IDLE ALL INDICATIONS STILL ERRATIC. DID NOT FEEL ANYTHING PHYSICALLY IN FLIGHT FROM ENG. R & R RT FCU.