As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START AND PACK/BLEED CONFIGURATION LT PACK LIGHT ILLUMINATED. UNABLE TO RESET. ACCOMPLISHED INITIAL EVALUATION OF ACM REF FIM 21 53 00 810 811 PG 4 STEP E, LT PACK LIGHT DID NOT COME ON. PERFORMED BITE OF LEFT PACK CONTROLLER SHOWS LT TCV FAULT REF 21 62 TASK 801. REMOVED & REPLACED LT TEMP CONTROL VALVE REF MM 21 51 10 000 801 & 21 51 10 400 801, OPS CHECK GOOD, NO LEAKS, BITE CHECK GOOD. PART VERIFIED, GROUND VERIFICATION SUCCESSFUL.