What was found
LHR - DURING OVERNIGHT MAINTENANCE, FIRST CLASS NR 1 OVEN SMOKES AT HIGH TEMPERATURE. CLEANED FIRST CLASS OVEN. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LHR - DURING OVERNIGHT MAINTENANCE, FIRST CLASS NR 1 OVEN SMOKES AT HIGH TEMPERATURE. CLEANED FIRST CLASS OVEN. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)