What was found
DURING AN APPROVED PRE-CERTIFICATION MINI EVACUATION DEMONSTRATION THE DOOR R4 ESCAPE SLIDE & RAFT FAILED TO DEPLOY FROM THE ACFT & INFLATE PROPERLY. INITIAL INVESTIGATION REVEALED THAT THE SLIDE PACK ASSEMBLY LANYARD, CONNECTING CABLE & PINS MECHANISM FAILED TO RELEASE THE SLIDE FROM THE PACK ASSEMBLY. THE DOOR ASSIST CHARGE FUNCTIONED BUT THE ATTACHMENT LANYARD FROM THE SLIDE RAFT PREVENTED THE DOOR FROM FULLY OPENING. INITIAL INVESTIGATION ALSO REVEALED THAT THE SLIDE PACK ASSEMBLY WAS INSTALLED ON THE ACFT DOOR CORRECTLY IAW THE AMM. THE SLIDE WAS REMOVED FROM THE ACFT, QUARANTINED & PROPERLY SHIPPED TO AN OVERHAUL VENDOR FOR FURTHER INVESTIGATION & RE-PACKING.