What was found
#1 AC GEN ILLUMINATED IN FLIGHT DURING CLIMB AT APPROXIMATELY 24,000 FT. PRIOR TO #1 AC GEN CAUTION, THE WNSHLD HOT (OR WNSHLD CTAL) CAUTION FLICKERED ON BRIEFLY (DID NOT RE-ILLUMINATE). WINDSHIELD HEAT WAS IN THE NORM POSITION STARTING AT 10,000 FT. PILOT STATIC 1/2/STBY HEATS WERE ALSO ON. ALL OTHER ICE PROTECTION SYSTEMS WERE OFF OR MANUAL. REMOVED AND REPLACED LH ACCB K1 CONTACTOR REF Q400 AMM 24-21-21-000-802 AND 24-21-21-400-802. OP TEST GOOD OF THE K1 CONTACTOR REF Q400 AMM 24-20-00-710-805.