What was found
LOWER AFT CARGO FIRE MASTER WARNING AND ALERT CAME ON DURING CRUISE AT FLT 390 DIVERTED IN DEN MEL 12AUG03 DEN ACN RELEASED FOR SERVICE PER MEL CDL 3A 26-22-01- 02 CATEGORY 3A B EXPIRATION 3A 15AUG03 AFTER DOWN LOAD 2 C INSPECTED AREA FOR SMOKE AND 2 FOR FIRE FOUND NONE. NO FREIGHT ON 2F 2C EMPTY CANS UP LOADED. DEFERRED PER MEL 26-22-01-02. PER FAULT ISOLATION MANUAL 26-14-00 2C. PERFORMED RTS OF AMSC 2C, NO FAULTS NOTED. PERFORMED LIGHTS AND MANUAL TEST FUNCTION PER 26-14-03-00 2CSTEP 2. SYSTEM OK. AFTER MAINTENANCE PERFORMED 2C RED FIRE BOTTLE 231 PER MM CHP 26-22-01-4 PERFORMED TESTS PER MM CHP 26-22-01-5. SYSTEM CKS OK USED TESTER DZZ7703-501B 2FN 4831 MEL ISC 2FW 2FC IS OK FOR FLT.