What was found
PIT - FLT 8051 - ON APPROACH TO PIT ON LOC INTERCEPT, CREW LOST SIGNAL ON BOTH SIDES WITH FLIGHT DIERECTOR AND AUTOPILOT COUPLED. AFTER ACCOMPLISHING GO-AROUND, CREW DID THE APPROACH HAND FLOWN WITHOUT THE FLIGHT DIRECTOR AND EVERYTHING SEEMED NORMAL. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FORWARD VOR ANTENNA AND THE NR 1 VOR/ILS NV RECEIVER. OPERATIONAL TEST NORMAL. (M)