As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT THE RT PROPELLER PITCH ANNUNCIATOR ILLUMINATED. ACFT WAS DIVERTED BACK FOR MX. TROUBLE SHOT THE DISCREPANCY & FOUND A DEFECTIVE RT PROXIMITY SWITCH. ENG RUNS WERE PERFORMED & SYS OPERATIONAL CHECKS WERE GOOD. ACFT WAS RETURNED TO SERVICE.