As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSH BACK AND ENGINE START, RIGHT "PACK" LIGHT ILLUMINATED DURING AFTER START FLOW, "PACK" LIGHT EXTINGUISHED ON MASTER CAUTION RESET. QRH PROCEDURES ACCOMPLISHED. GROUNDED - YES. RIGHT HAND TCV FAILED BITE TEST. REMOVED AND REPLACED RIGHT HAND TCV IAW B737-800 AMM 21-51-10-401, OPS CHECK GOOD IAW 21-61-00-700-806-002. LEAK CHECK GOOD.