What was found
NUMBER 4 ENGINE FIRE INDICATION ON ENG SHUTDOWN. PERFORMED ENG FIRE ON GROUND QRH.DISCHARGED BTH FIRE BOTTLES PER QRH INDICATION EXTINGUISHED AFTER SECOND BOTTLE. C/W FIM 26-11 TASK 808, NO FIRE CONDITION, FOUND T5683 LP A SHORT TO GROUND AND LOOP B BROKEN WIRE. IAW SWPM 20-31-11/20-63-13, REPLACED W5316-002-16R, IAW AMM 26-11-02, REPLACED T5683 ASSY & ENG FIRE OVHT DET SYS TEST NORMAL. IAW AMM 26-21-03, REPLACED RT BOTH FIRE EXTINGUISHER BOTTLES & TEST NORMAL. IAW AMM 71-00-00, PERFORMED NR 4 ENG IDLE RUN AND CHKD NORMAL. REF IPC 26-21-03-01 ITEM 55 & IPC 26-11-02-02A, ITEM 100.