What was found
DURING CRUISE, OVERHEAD ILLUMINATED ON MASTER CAUTION RECALL ANNUNCIATOR. NO LIGHTS ILLUMINATED ON OVERHEAD PANEL. ON RECALL THE LT PACK LIGHT ILLUMINATED. ALL PRESSURIZATION AND TEMPERATURES WERE NORMAL IAW THE QRH PROCEDURE, WE RESET THE MASTER CAUTION PUSH TO RESET BUTTON. THE PACK LIGHT EXTINGUISHED. ACFT GROUNDED. ACCOMP FIM TASK 21-62, TASK 830. ACCOMPLISHED BITE CK REF. AMM 21-61-00, FAULT DOES NOT SHOW. FAULT DETERMINED TO BE INTERMITTENT. NO HISTORY IN 90 DAYS. OPS CK NORMAL, NO FAULTS.