As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW CREW REPORTED AFTER TAKE OFF AIRCRAFT DID NOT PRESSURIZE, AUTO SPOILER FAIL LIGHT & STALL INDICATOR FAIL LIGHTS ILLUMINATED. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED S1-12 SWITCH. SYSTEM GROUND CHECKED NORMAL. OPERATION (CLOSED)