What was found
SHIP 9580 -MISC/DE- THE FLIGHT CREW DECLARED AN EMERGENCY DUE TO A "PSEU FAIL" MESSAGE. THE QRH WAS COMPLIED WITH AND THE LANDING GEAR POSITION INDICATIONS WERE NORMAL FOLLOWING GEAR EXTENSION FOR LANDING. HOWEVER, THE LEADING EDGE SLATS FAILED TO EXTEND RESULTING IN A "NO FLAPS, NO SLATS" LANDING. THE LANDING WAS GOOD EXCEPT FOR A BRAKE OVERHEAT CONDITION. CORRECTIVE ACTION: MAINTENANCE REPLACED THE PSEU AND PERFORMED APPLICABLE RETURN TO SERVICE TESTS. ALL TESTS PASSED. (LP #4010566)