As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START AND COMPLETING AFTER START CHECK LIST ON MASTER CAUTION RECALL LT PACK LIGHT ILLUMINATED. RETURNED TO GATE IAW MAINTENANCE ADVISE. ACFT GROUNDED. ACCOMPLISHED FIM 21-51, TASK 803. PACK ZONE TEMP CONT BITE. AMM 21-51-70-700-803 AND RAM AIR SYS OPS TEST AMM 21-51-00-740-009. ALL TESTS PASSED. GROUND VERIFICATION SUCCESSFUL.