B767-300 and 300 ER
Flight Crew Commercial
Aircraft Equipment Problem Critical; Deviation - Track / Heading All Types; Inflight Event / Encounter Weather / Turbulence
Flight Crew Diverted; Flight Crew Executed Go Around / Missed Approach
Aircraft; ATC Equipment / Nav Facility / Buildings
We executed a missed approach to Runway 36L at DFW. I was the pilot flying. I configured early and intercepted the localizer on the autopilot. The Captain and I noticed the localizer drifting left so I disconnected the autopilot and aggressively pursued the localizer. The localizer did not move. At about 1;000 FT the Captain asked the Controller if he had us right of course. The Controller said he had us left of course; and then he said he had us visually well left of course. We executed a missed approach/go around and requested vectors direct to our alternate. The alternate was VFR but we elected to fly the ILS to 35L to determine if our ILS receiver was operating correctly. It operated correctly. The return to DFW was uneventful.
When their localizer receiver provided anomalous guidance the flight crew of a B767-300ER elected to divert to their VFR alternate. While utilizing the ILS at the alternate it functioned normally.