As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, WHEN TAKEOFF POWER WAS SET A STRONG ELECTRICAL BURNING SMELL FILLED THE CABIN FLIGHT DECK AND CABIN TEMPERATURE SPIKED JUST BEFORE ROTATION. REMOVED AND REPLACED SIDEWALL LIGHTS ASSEMBLY AT 3A (AALA202604063262), 4A (AALA202604077998), AND 14A (AALA202604074876). PER AMM 33-21-00. OPS CHECKS GOOD.