A B757-200 PLT RPT ON L #1 DOOR WAS WORKED. TECHNICIANS COULD FIND NO FAULT WITH TESTS AND FOUND ALL NORMAL.

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ON JUN/XA/05 I WAS ASSIGNED WITH MR X TO TROUBLESHOOT AND REPAIR PLT LOG RPT (L1 DOOR HARD TO OPEN). WE FOUND AN EXTERNAL FUSELAGE HINGE ACCESS PANEL REMOVED BUT THERE WAS NO DOCUMENTATION OF THIS OR ANY OTHER TROUBLESHOOTING IN THE LOGBOOK OR ANY TECHNICIAN'S NON ROUTINE WRITE-UP. A PART WAS ORDERED FOR THE DOOR BUT DURING OUR TROUBLESHOOTING IT DID NOT APPEAR THAT THIS PART WAS DEFECTIVE. THE DOOR OP DID NOT FEEL ABNORMAL TO OUR EXPERIENCE WITH OTHER B757 ENTRY DOORS. WE SOLICITED THE HELP AND OPINION OF OTHER MECHS AND BOTH CREW CHIEFS AS TO THE OP OF THE DOOR AND THEY ALL FELT IT WAS OPERATING NORMALLY. WE THEN LUBED THE DOOR. THE ONLY ITEM WE COULD FIND WAS THE PIN INDICATOR ON THE DAMPENING SNUBBER EXTENDED. WE TALKED TO TECHNICAL SVCS AND AGREED THAT THE SNUBBER WOULD IN NO WAY IMPEDE THE OP OF THE OPENING OF THE DOOR AND THAT THEY WOULD PUT AN ITEM IN TO HAVE THE PART REPLACED. THIS WAS THE FIRST WRITE-UP ON THE DOOR AND THERE WAS NO PRIOR HISTORY OF THE PROBS WITH IT. SINCE IN OUR TROUBLESHOOTING WE FOUND NO STRUCTURAL OR MECHANICAL PROBS; NO DAMAGED LINKAGES OR BINDING AND NO PROB WITH THE PART THAT WAS ORDERED; AND SINCE THE DOOR OP WAS NORMAL NOT ONLY TO MYSELF AND MR X; BUT TO OTHER MECHS AND CREW CHIEFS; WE FELT CONFIDENT WITH OUR FINDINGS AND LUBRICATED THE DOOR. BY SUBMITTING THIS LETTER; I WISH TO RPT MY FINDINGS. CONTRIBUTING FACTORS: SUPVR TURNOVER SHEET WAS NOT AVAILABLE AT THE HANGAR; AND THE LINE MECH DID NOT DOCUMENT HIS FINDINGS OR TROUBLESHOOTING.