What was found
AIRCRAFT WAS GROUNDED: ENGINE 1 FIRE EXTINGUISHING AGENT 1 DISCHARGE LIGHT ILLUMINATED AMBER APPROXIMATELY 1 HOUR INTO FLIGHT AT LEVEL CRUISE (FL330) NO ECAM ASSOCIATED WITH DISCHARGE LIGHT. THE LIGHT HAS REMAINED ILLUMINATED FOR ENTIRE FLIGHT. MAINTENANCE ACCOMPLISHED FIRE DETECT CONTROL TEST PER AMM 26-12-00, NO FAULTS NOTED, NO ECAM OR POST FLIGHT REPORT, ALL OPERATIONAL CHECKS NORMAL,