As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START ON THE RECALL ITEM THE LEFT PACK LIGHT CAME ON AS EXPECTED GIVEN MEL 21-32B. WHEN MASTER CAUTION RESET BUTTON WAS PUSHED THE LEFT PACK LIGHT DID NOT EXTINGUISH. GROUNDED - YES. PERFORMED BITE TEST, REF B737-800 FIM 21-62 TASK 801 FAULT LH PRIMARY TCV AND STANDBY TCV FAULT POSTED. AFTER BITE TEST STANDBY TCV FAULT CLEARED.