What was found
CONTINUAL NEEDLE SPLIT GREATER THAN 15% CAUSING VAR NR CAUTION TO COME ON DURING HOVERING FLIGHT. A TEST FLIGHT EVAL FOUND THAT WHILE MAKING ADJUSTMENTS TO VARTOMS, AMM 05-60-00, 6-10, 1.1 (SYMMETRY OF ENGINE GOVERNORS) TQ NUMBERS WERE INCONSISTENT. FIRST PULL TO 60% TQ ON #1 SHOWED A 5% SPLIT WITH #1 HIGH, SECOND PULL TO 60% ON #1 SHOWED 9% SPLIT WITH ONE HIGH, THIRD PULL TO 60% ON #1 SHOWED 8% SPLIT WITH #2 HIGH. #2 SYSTEM WAS CONSISTENTLY SLOW TO REACT AND FOLLOW #1. REMOVED AND REPLACED #2 ENGINE FUEL CONTROL UNIT IAW ARRIEL EMM 73-21-00-900-801-B01.