What was found
FLIGHT 2171. DURING T/O REACHING 1000/ AGL THE #2 THRUST LEVER DECREASED TO THE POINT THAT THE A/T DISENGAGED. WE ADVANCED THE THRUST LEVER TO T/O POSTION & REENGAGED A/T. NO FURTHER PROBLEMS NOTED. REMOVED FROM SERVICE AND PLACED ON MEL. MEL CLEARED BY REMOVING THE THRUST CONTROL QUADRANT IAW AMM 26-11-01-000-801-A. INSTALLED NEW THRUST CONTROL QUADRANT IAW AMM 76-11-01-400-801-A PARA 1-7A. PREFORMED TCQ, TR, AND TOGA SWITCH OPS TEST (GOOD). REF AMM 76-11-01-400-801-A STEP 7.B-F. RETURNED TO SERVICE.