Narrative:

I was shooting the fairbanks international ILS 20R approach and was between cigni and hosan. I'm not sure of the exact altitude; but somewhere between 1;300-1;800 MSL on the glide slope the tower on 118.3 radioed me a low altitude alert warning and said to climb immediately. I put power in and immediately climbed losing the glide slope. I had ground contact at this point and I did not believe the tower's warning that my altitude was too low; but I complied with their directions and climbed. Once I climbed 300-400 feet; I could see the runway lights; so I continued my approach and made a normal safe landing on the runway. The visibility issues were due to smoke and the visibility at the time was 2-3 SM. After I taxied back; shutdown the plane; and unloaded my passengers; I called fairbanks tower to ask them about the low altitude warning. When I told them that the needles were centered and it happened between cigni and hosan I was informed that the tower's radar alert system sometimes gives erroneous readings and that between those 2 fixes on the ILS 20R was a common place for the erroneous warning to happen. Having analyzed my response to this situation I think a better response to this event in the future would be to go missed on the approach. I did not go missed because I was very familiar with this approach and I had ground contact at the point of the warning. In the future I plan to climb anyway; go missed and come back and try a different approach the second time.

Related reports:

Google
 

Original NASA ASRS Text

Title: Pilot reported being advised of a Low Altitude Alert; climbing; seeing the airport visually; then landing. Tower advised ATC sometimes gets erroneous alerts at the aircraft 's position.

Narrative: I was shooting the Fairbanks International ILS 20R approach and was between CIGNI and HOSAN. I'm not sure of the exact altitude; but somewhere between 1;300-1;800 MSL on the glide slope the Tower on 118.3 radioed me a low altitude alert warning and said to climb immediately. I put power in and immediately climbed losing the glide slope. I had Ground contact at this point and I did not believe the Tower's warning that my altitude was too low; but I complied with their directions and climbed. Once I climbed 300-400 feet; I could see the runway lights; so I continued my approach and made a normal safe landing on the runway. The visibility issues were due to smoke and the visibility at the time was 2-3 SM. After I taxied back; shutdown the plane; and unloaded my passengers; I called Fairbanks Tower to ask them about the low altitude warning. When I told them that the needles were centered and it happened between CIGNI and HOSAN I was informed that the Tower's radar alert system sometimes gives erroneous readings and that between those 2 fixes on the ILS 20R was a common place for the erroneous warning to happen. Having analyzed my response to this situation I think a better response to this event in the future would be to go missed on the approach. I did not go missed because I was very familiar with this approach and I had ground contact at the point of the warning. In the future I plan to climb anyway; go missed and come back and try a different approach the second time.

Data retrieved from NASA's ASRS site 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.