As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - ELECTRICAL POWER - CREW REPORTED, "AFTER TAKEOFF FA'S REPORTED THE CABIN LIGHTS FLICKERING BADLY DURING TAKEOFF AND CLIMB." ON ELEC PAGE THE NR 2 GEN VARIED FROM 390HZ TO 410HZ. CREW STARTED APU AND PUT APU GEN ON AC BUSS 2. CABIN LIGHTS STOPPED FLICKERING. CYCLED NR 2 GEN AND APU GEN TO CONFIRM. MAINTENANCE PLACED THE NR 2 IDG ON MEL. MAINTENANCE REMOVED AND REPLACED THE NR 2 IDG IAW AWA TASK CARD R5M24301. OPERATIONAL CHECKS WERE GOOD.