What was found
CLIMBING THROUGH 25,000, CABIN ALTITUDE ALERT SOUNDED. ALL SWITCHES WERE IN NORM POSITIONS, CABIN PRESSURE READ 9,500 FT. AIRCRAFT RETURNED TO MDW AND MADE AN UNEVENTFUL LANDING. REPLACED CABIN PRESSURE CONTROL PANEL PER BOEING M/M.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLIMBING THROUGH 25,000, CABIN ALTITUDE ALERT SOUNDED. ALL SWITCHES WERE IN NORM POSITIONS, CABIN PRESSURE READ 9,500 FT. AIRCRAFT RETURNED TO MDW AND MADE AN UNEVENTFUL LANDING. REPLACED CABIN PRESSURE CONTROL PANEL PER BOEING M/M.