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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.
| Attributes | |
| ACN | 992736 |
| Time | |
| Date | 201201 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | D10.TRACON |
| State Reference | TX |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Commercial |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Track / Heading All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
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.
Original NASA ASRS Text
Title: 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.
Narrative: 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.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.