As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THERE WAS AN UNUSUAL ODOR THAT FILLED THE COCKPIT AND FIRST THREE ROWS IN THE CABIN WHEN THE HEAT WAS TURNED UP ON THE NR 1 PACK. THE ODOR SOON DISSIPATED. OPS CHECKED PACK SYSTEM IAW FIM 21-20-00-310-801A. NO ODOR NOTED AT THIS TIME AND DATE. OPS CHECK GOOD.