What was found
DURING MAINTENANCE WHILE ACCOMPLISHING PC5901 TAIL CONE EVACUATION SLIDE DEPLOY, ESCAPE SLIDE FAILED TO DEPLOY. APPEARED SNAP BUTTON ON LANYARD TO SLIDE CONTAINER DID NOT HAVE POSITIVE ENGAGEMENT. WHEN TAIL CONE JETTISON OCCURRED THE LANYARD PULLED LOOSE FROM CONTAINER (COVER) AND FAILED TO OPEN CONTAINER AND DEPLOY SLIDE. CONNECTED LANYARD PROPERLY TO SLIDE CONTAINER AND PERFORMED JETTISON OF TAIL CONE. SLIDE DEPLOYED NORMALLY.