What was found
(CAN) BA SER CASE: 43740 SER - TARGET OF N1 AND N2 DIFFERENCES DURING APPROACH TARGET OF N1 AND N2 DIFFERENCES DURING APPROACH/00:00 (REF EVENT 54146) UNEVEN THRUST IN DESCEND. OBSERVED A DELTA OF 4.5 TO 5 PERCENT N1 IN DESCEND. LH ENGINE THE ONE WITH THE HIGHER OUTPUT. TRIED DIFFERENT SET UP:AT ON AND OFF, IDLE, CAI ON/OFF - NO INFLUENCE. SUDDENLY AT FL100 VALUES EQUAL AGAIN FDR ANALYSIS IN PROGRESS . NEXT ADVISE TIME APRIL 4TH 1400LT (TC# 20190404001)