What was found
DURING TRAINING DEPLOYMENT OF L-1 DOOR EMERGENCY EXIT SLIDE, THE SLIDE FAILED TO COMPLETELY UNFOLD, THE BOTTOM 2 LANYARDS FAILED TO PULL THROUGH STRAP EYELETS WHICH PREVENTED APPROXIMATELY THE LAST 1.5 - 2.0 FT TO UNFOLD AND INFLATE. AN ENGINEERING EVALUATION WAS PERFORMED, ALL COMPONENTS INCLUDING THE FRANGIBLE LINKS WHICH DID NOT BREAK WERE TESTED AND FOUND TO CONFORM TO SYSTEM REQUIREMENTS. POSSIBLE CAUSES, BASED ON THE EVIDENCE PRESENTED, CYLINDER WAS NOT COMPLETELY CHARGED OR THE ASPIRATOR AIRFLOW WAS PARTIALLY BLOCKED DURING THE INITIAL STAGES OF DEPLOYMENT. THE BLOCKAGE COULD HAVE OCCURRED IF THE SLIDE FOLDING WAS NOT IN COMPLETE IAW THE FOLDING PROCEDURE. (K)