As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LT CAME ON AT T/D DESCENT CHECK. WOULD NOT RESET. WENT OUT DURING DESCENT OMITS OWN NO PRESSURE CHANGE NOTED. GROUNDED - YES. C/W PACK/ZONE TEMPERATURE CONTROLLER BITE TEST FOR NR 1 CONTROLLER. ON (BIT) SHOWED RAM AIR ACT, ON ( PREV FLT) SHOWED RAM AIR ACT, ON (VERIFY) NO FAULTS WERE NOTED, NO HISTORY 90 DAYS PREVIOUSLY. OPS NORMAL AT THIS TIME. REF. AMM 21-51-00-700-803.