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Air carrier on ILS prm 9R to atl was questioned by ATC as to localizer tracking; the flight crew confirmed both via instruments and visually 'on course'; controller acknowledged ATC equipment faults.
| Attributes | |
| ACN | 1100018 |
| Time | |
| Date | 201307 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ATL.Airport |
| State Reference | GA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types |
Narrative:
On the ILS prm 9R; approximately at burny; final monitor called stating something to the effect of '[air carrier X]; I show you right of course; return to the localizer immediately.' we were coupled to the ap. I looked up and confirmed on both left and right localizer that we were dead center on the localizer. Also; we had the runway in sight at this point and visually; we were right on centerline with 9R. The first officer replied stating that we indicated we were on the localizer center. The monitor then replied something to the effect of 'I had a radar error; my apologies; continue.' we then continued without issue. Cause; this is something that I haven't seen or heard of before. Fortunately; we were VMC to where we could confirm our location. Because we could see both the runway and traffic to our left and right on parallel approaches; we did not make a left turn. I'm not sure what caused this brief confusion; but I thought it would be worth noting in a report.
Original NASA ASRS Text
Title: Air Carrier on ILS PRM 9R to ATL was questioned by ATC as to LOC tracking; the flight crew confirmed both via instruments and visually 'on course'; Controller acknowledged ATC equipment faults.
Narrative: On the ILS PRM 9R; approximately at BURNY; Final Monitor called stating something to the effect of '[Air Carrier X]; I show you right of course; return to the LOC immediately.' We were coupled to the AP. I looked up and confirmed on both left and right LOC that we were dead center on the LOC. Also; we had the runway in sight at this point and visually; we were right on centerline with 9R. The First Officer replied stating that we indicated we were on the LOC center. The Monitor then replied something to the effect of 'I had a RADAR error; my apologies; continue.' We then continued without issue. Cause; this is something that I haven't seen or heard of before. Fortunately; we were VMC to where we could confirm our location. Because we could see both the runway and traffic to our left and right on parallel approaches; we did not make a left turn. I'm not sure what caused this brief confusion; but I thought it would be worth noting in a report.
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.