What was found
AFTER BLOCK-IN , WITH BOTH L1 AND R1 DOORS DISARMED AND L1 DOOR CRACKED, THE L1 DOOR SLIDE FELL OUT ON TO THE CREW STAIRS, BUT DID NOT DEPLOY. MX DISCONNECTED GIRT BAR FROM ACFT, L1 DOOR WAS IN ARMED POSITION AND FULLY OPEN, SLIDE HAD PINS PULLED ON YELLOW COVER BUT HAD NOT INFLATED. FOUND DOOR ASSIST CYLINDER DEFLATED. SLIDE PREVIOUSLY INSTALLED AND IS COMPATIBLE IAW EA F-2560-TO30267, ACFT IS OK FOR CONT SERVICE IAW THIS EA AND AMM INSTRUCTIONS.