As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF ON FLIGHT 5549 FROM PITTSBURGH PENSYLVANIA, THE LEFT PROP RPM ONLY SHOWED 1500 RPMS. THE CREW RETURNED TO GATE WITH NO FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE PROP GOVERNOR. TEARDOWN REPORT WILL BE AVAILABLE AT A LATER DATE.