As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON APPROACH ON FLIGHT 5578 INTO PITTSBURGH PENNSYLVANIA, THE GEAR WAS SELECTED DOWN BY NORMAL EXTENSION. WHEN FAILED, THE EMERGENCY EXTENSION WAS PERFORMED WITH GEAR DOWN AND LOCKED. AIRCRAFT LANDED WITH NO FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FLEX LINE. NO TEARDOWN REPORT WILL BE REQUIRED.