As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, COULD NOT PRESSURIZE AIRCRAFT. CONTINUTED FLIGHT TO DTW AT FL100. AIRCRAFT LANDED WITHOUT INCIDENT. LEFT PACK SWITCH S123 WAS FOUND WIRED INCORRECTLY. REWIRED SWITCH AND PERFORMED PRESSURIZATION CHECK, OPERATIONAL CHECK OK.