What was found
AIRCRAFT WAS NOT GROUNDED. INSTALLED R3 DOOR SLIDE. PERFORMED OPERATIONS CHECK. OPERATIONS CHECKED FAILED. FAP INICATED "R3 CHECK BOTTLE PRESSURE". PRESSURE BOTTLE IN GREEN BAND, PER TSM 25-62-00-810-810-A FAULT REQUIRES REPLACEMENT OF THE DEU-B(300RHG) AMM 23-73-47-000-001 AND AMM 23-73-47-400-001. REMOVED AND REPLACED THE DEU-B(300RHG), IAW AMM 23-74-47. REINSPECTED ALL CANON PLUGS ON R3 DOOR SLIDE AND RECYCLED CIRCUIT BREAKERS, IAW AMM 33-51-00. ALL CANON PLUGS SECURED. ACCOMPLISHED BITE CHECK OF THE OPERATIONAL CHECK OF THE EPSU, IAW WORK CARD 26L00025012 STEP 12. OPERATIONS CHECK GOOD.