What was found
ON GROUND, RT PACK LIGHT ILLUMINATES DURING RECALL. EXTINGUISHES WITH MASTER CAUTION RESET, QRH FOLLOWED. CONFIRMED DISCREPANCY, RT PACK LT ILLUMINATED UPON RECALL & EXTINGUISHES WITH MASTER CAUTION RESET. FOUND NR 2 PACK/ZONE TEMP CONTROLER WITH TCV. THIS PACK FAULT LIGHT ON WHEN PREV FLT HISTORY BUTTON PRESSED. PERFORMED PACK/ZONE TEMP CONTROLER BITE TEST OF BOTH NR 1 & NR 2 UNITS IAW AMM 21-61-00. BOTH OPS NORMAL AND ALL FAULT LIGHTS REMAIN EXTINGUISHED. RT PACK LT REMAINS EXTINGUISHED UPON RECALL. NO HISTORY LAST 30 DAYS. GROUND VERIFICATION TEST SUCCESSFUL.