As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, DURING GEAR RETRACTION. TAKEOFF CONFIGURATION HORN AND GEAR UNSAFE INDICATIONS CAME UP ALONG WITH ERRATIC MESSAGES. DECLARED EMERGENCY AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE PSEU, OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. PART TOTAL CYCLES, 629.