What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ON TAKEOFF MASTER CAUTION ILLUMINATED FOR MULTIPLE DOOR LIGHTS AND CLIMB MASTER CAUTION AND WARNING ILLUMINATED FOR DOOR LIGHTS, TAKEOFF WARNING HORN, AND MULTIPLE AUTOPILOT/AUTO THROTTLE WARNING CAUTIONS AND WARNING LIGHTS ILLUMINATED; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT ORD. REPLACED PSEU. SYSTEM OPERTIOINAL CHECK GOOD. PER AMM 32-09-10.