What was found
FOUND APU DISCHARGED LIGHT ON AND APU BOTTLE INDICATION OFF. DAYSHIFT R/R APU BOTTLE. APU BOTTLE WAS DISCHARGED UNCOMMANDED REQUIRES FURTHER TROUBLESHOOTING ROTABLE PARTS CHANGE WAS INDICATED - TT # 1038041 SN OFF 8782 BOTTLE, FIRE, E OFF 29-2621-9-9001 8782 ON 29-2621-9-9001 7486 APU FIRE BOTTLE NIS GUM CANNON PLUGS D1080, D580 ON P8 PANEL. PLUG D40810P ON E1-3 BOTTLE. THESE CANNON PLUGS ARE DISCONNECTED FOR TROUBLE SHOOTING. SHELF. PLUG D48080P MLG WHEEL WELL. PLUG D594 ON APU FIRE AMM 49-11-00-200-802. CLEANED APU COMPONENTS FOR UNCOMMANDED FIRE BOTTLE DISCHARGE PER TSHOT APU FIRE EXTINGUISHING SYSTEM, FOUND CANNON PLUG D48080P AT P28 APU FIRE CONTROL PANEL IN MLG WHEEL WELL PIN 8 HAS 28V. ALSO S16 APU REMOTE FIRE SWITCH HAS A INTERNAL HIGH RESISTANCE SHORT TO GROUND. REMOVED AND REPLACED CANNON PLUG AND APU REMOTE FIRE SWITCH WITH SERVICEABLE UNITS, REF WDM 26-21-11. CONNECTED CANNON PLUGS D1080, D580, D40810P, D48080P. OPS CK GOOD. BOTTLE, FIRE, E OFF 29-2621-9-9001 3800 ON 29-2621-9-9001 7482 REMOVED AND REPLACED APU FIRE BOTTLE PER AMM 26-22-01, OPS CHECK GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1038031 SN OFF 3800 APU FIRE BOTTLE INSTALLATION IDT INSPECTION. C/W.