What was found
TECH NOTED L1 DOOR EXTERNAL HANDLE WOULD NOT OPEN DOOR. WAS ABLE TO PULL THE HANDLE FROM STOWED POSITION AND ROTATE IT BUT IT WOULD NOT ENGAGE TO OPEN. ACFT GROUNDED. REMOVED AND REINSTALLED INTERIOR DOOR HANDLE REF MM 52-11-31. REMOVED EXTERIOR DOOR HANDLE REMOVED EXTERIOR DOOR HANDLE. REMOVED SLEEVE FROM EXTERIOR DOOR HANDLE. REMOVED CENTER SHAFT FROM SLEEVE. CLEANED ALL PARTS AND NO DEFECTS NOTED. GREASED ALL PARTS REASSEMBLED THE CENTER SHAFT, SLEEVE AND DOOR HANDLE. REINSTALLED EXTERIOR DOOR HANDLE ON ACFT AND OPS NORMAL REF CMM 52-16-12. ACFT OK FOR SERVICE.