What was found
DURING HEAVY MAINTENANCE: REPLACE L1 DOOR SLIDE RAFT DUE TO FAILURE OF EMERGENCY LIGHT TEST ( PASS/OVERWING DOOR SLIDE/RAFTS); REMOVED AND REPLACED L1 DOOR SLIDE PACK ASSEMBLY IAW AMM 25-62-44-400-007-A OPS CHECK OK. MCC NOTIFIED, DISPATCH 87674, MX-4 UPDATED, PLACARD REMOVED.'