As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - ON CLIMBOUT FROM PHX, CREW REPORTED THE RIGHT MAIN LANDING GEAR RED LIGHT FLASHED OFF AND ON INTERMITTENTLY AFTER GEAR RETRACTION. AN EMERGENCY WAS DECLARED AND THE FLIGHT RETURNED TO FIELD AT PHX WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE RIGHT MAIN LANDING GEAR UPLOCK SENSOR PER MM 32-61-21-4. INDICATION NORMAL.