What was found
SLIDE RAFTS AT LOCATIONS 1L, 2L, 3L, & 4L DID NOT EASILY DETACH FROM AIRCRAFT AFTER INFLATION DURING A SIMULATED MINIATURE EVACUATION AND DITCHING CERTIFICATION EVENT. REMOVED SLIDES PER DMC-B787-A-25-66-00-01B-521-A AND REPLACED SLIDE ASSEMBLIES 1L, 2L, 3L, 4&L PER DMC-B787-A-25-66-01-01B-720-A. OPS CHECK GOOD. OK FOR SVC.