As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THRU 28K FT CABIN ALT WARNING LIGHT ON OVERHEAD AND FWD PANEL ILLUMINATED WITH ASSOCIATED AURAL WARNING. CABIN ALT READ 11K, CONDUCTED EMER DESCENT. REPLACED NR 1 PRESS CONTROLLER, RAN BITE ON BOTH CONTROLLERS AND OPN NORMAL.