As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NON-NORMAL ODOR IN FLIGHT DECK FROM FLT DECK GASPER VENTS WHEN FLIGHT DECK TEMP CONTROLLER HEATING ELEMENT CYCLES ON. MX MSG 21-71321 FWD ZONAL DRYER ELEC DRIVE PWR FAIL, STRONG ODOR NOTICED WHEN HEATER ELEMENT REMOVED. REPLACED HEATER FWD DRYER REF DMC-B787-A-21-72-04-00A-520A-A AND 720A-A AND AIR FILTER REF DMC-B-787-A-21-72-02-00B-520A-A AND 720A-A. RAN ALL 4 CACS AND ALL TESTS PASSED. NO ODOR NOTICED.