As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4373 THE CREW NOTICED A STRONG BURNING SMELL AFTER TAKEOFF. THE ODOR WAS NOTICEABLE THROUGHOUT THE COCKPIT AND CABIN. THE AIRCRAFT RETURNED TO THE FIELD AS AN UNSCHEDULED LANDING. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED ENGINE 1 IAW ETN EMB 72-034. AIRCRAFT RETURNED TO SERVICE.