As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL LT PACK LIGHT ILLUMINATED. GOES BACK OFF WITH MASTER CAUTION RESET. ACFT GROUNDED. BITE CHECK NR 1 CONTROLLER, SHOWS THIS PACK TCV FAULT. REMOVED & INSTALLED NEW LT PACK PRI TEMP CONTROL VALVE. REF: AMM 21-51-10. INTERROGATED NR 1 ZONE TEMP CONTROLLER, BITE TEST, REF: AMM 21-61-00: TEST GOOD.