As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT THRU 18,000 DURING RECALL RIGHT PACK LIGHT ILLUMINATED. RAN QRH PACK LIGHT EXTINGUISHED THEN RE-ILLUMINATED. GROUNDED - YES. PERFORMED BITE REF B737-800 AMM 21-61-00-700-806-002 RAM ACT FAULT ON PREV FLT VERIFY TEST PASS RESET FAULT. FAULT INTERMITTENT.