What was found
FIRE EXTINGUISHER WAS RECEIVED INTO SHOP AS CONDITION UNKNOWN. NO TAG. UPON DISASSEMBLY, THE FOLLOWING DISCREPANCIES WERE NOTED, RENDERING UNIT INOPERATIVE. AGENT REMOVED NOT HALON 1301 AS SPECIFIED. ADDITIONAL COPPER DISK INSTALLED UNDER SAFETY PLUG. (PLUG IN BLOWN CONDITION). RUPTURED DISK NOT RECOGNIZED AS APPROVED PART. GAUGE READS 'O' PSI. FAA NOTE: PART ORIGINATED OUTSIDE U.S.