What was found
DESCENDING THRU 4000 FT GOT BOTH LEFT AND RIGHT CABIN DOOR ANNUNCIATOR LIGHTS ILLUM. PRESSURIZATION WENT TO ZERO DIFF PRESS AND CABIN ALT= ACFT ALT. LANDED EWR WITHOUT INCIDENT. FOUND BOTH AFT DOORS OPEN ON WALKAROUND, TRIED TO ELECTRICALLY CLOSE DOORS NO HELP. FOUND ALL C/B'S IN OVERHEAD PANEL OF MCD PULLED AND COLLARED. RESET C/B'S NO HELP. BOTH RED T-HANDLES WERE TAPED DOWN. BOTH DOORS ARE IN THE ARMED POSITION. RECOLLARD C/B'S, PANEL IS STILL OPEN AND WILL NEED TAPED. PERFORMED ADJUSTMENT AND TEST PER DC10 MM 52-10-01-2. FOUND RED EMERGENCY HANDLE HAD BEEN PULLED ON BOTH DOORS. SUSPECT HANDLE INADVERTENTLY BEEN PULLED DURING "B" CHECK. RESET HANDLES/DOORS PER SAME MM. NO OTHER DEFECTS NOTE