What was found
AIRCRAFT IN BASE MAINTENANCE: L1 DOOR HAS BUZZ/ VIBRATION AT 21000 AND ABOVE @ 280 KNOTS AND ABOVE. REPLACED UPPER CORNER PLATE ON THE L1 DOOR PER SRM 51-42-11.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT IN BASE MAINTENANCE: L1 DOOR HAS BUZZ/ VIBRATION AT 21000 AND ABOVE @ 280 KNOTS AND ABOVE. REPLACED UPPER CORNER PLATE ON THE L1 DOOR PER SRM 51-42-11.