What was found
LEFT GEN DROPPING OFFLINE AFTER ENGINE START AND DURING TAXI MOMENTARILY, OCCURRED THREE TIMES, GEN CAME BACK ONLINE EVERY TIME. TRANSFERRED TO DMI 140758, IAW MEL 24-00-01-01, CAT B. PERFORMED OPERATIONS CHECK ON LEFT IDG, IAW B767 AMM 24-11-00. NO MESSAGE ON BPCU, OPERATIONS CHECK GOOD. THIS CLEARS DMI 140758.