What was found
100278365: L1 DOOR GIRT BAR FROM SLIDE DROPPED WHEN DOOR OPENED. L/H SIDE GIRT BAR DROPS FROM INSIDE VIEW. TRANSFERRED TO DMI 100278365 IAW B777 MEL B 25-10, 52-11-01-01B. CAT C DUE 12-16-25. PLACARDS INSTALLED "M" PROCEDURES C/W. 100287409: REFERENCE DMI #100278365. REMOVED AND REINSTALLED L1 DOOR SLIDE ASSY IAW AMM 25-66-01 AND CLEANED GIRT BAR MECHANISM IAW BSOPM 20-30-03. THIS CLEARS DMI 100278365, PLACARDS REMOVED.