What was found
CABIN EMERGENCY LIGHT CHECK FAILED. EPSU EXT LOAD FWD L. REPLACED FWD LEFT POWER SUPPLY AND BATTERY, NO HELP. SUSPECT FWD LEFT ESCAPE SLIDE. REMOVED RIGHT FWD 7500-MM AND LEFT FWD 7501 SLIDES AND SHUNTED BOTH SLIDES STILL FAILS TEST. FOUND RIGHT OVERWING ESPU FAILING BITE CHECK, REPLACED EPSU 12-WL, NO HELP. DOOR 1L DOOR DISARMED AND SLIDE REMOVED. REPLACED SLIDE, OPS CKS OK. P/N D31516-313 (SERIAL# 'OFF' = 2290 / SERIAL# 'ON' = 2049). SLIDE REARMED. REPLACED EPSU 12-WL AND BATTERY REF. AMM 33-51-38-000-001-A BITE CHECKS GOOD.