What was found
RECEIVED LEVEL 1 ALERT GEN 1 OFF. SLIGHT ACRID ODOR, DID CHECKLIST & RETURNED. RAN ENGINE IAW JRH, DISCONNECTED NR 1 GEN IAW MEL 24-21-01. WHILE RUNNING ENG NR 1 THERE WAS NO ODOR IN COCKPIT. WHEN CREW ARRIVED THEY WERE ASKED IF THERE WAS STILL AN ODOR, THEY REPLIED IT WAS MOMENTARY WHEN THE GEN 1 OFF LIGHT ILLUMINATED THEN WENT AWAY & THERE WAS NO LONGER AN ODOR. EPCU CURRENT FAULTS IDG 1 & INTFC BTR-1 TRIP INTERF EPCU FAULT REVIEW LAST LEG IDG1-1 & INTF OVER FREQUENCY MEL 28 APR 15 04:33. RELEASED FOR SERVICE IAW MEL 24-21-01 CATEGORY B, EXPIRATION 01MAY15. NR 1 IDG INOPERATIVE & DISCONNECTED. R & R AMM 24-21-02-4-1. OPERATIONS CHECKED GOOD.