Narrative:

We were flying along; and noticed that we were getting high for our approach. I contacted ATC who did not respond. Our last transmission was as clear as a bell; and had been about 10 or 15 minutes ago. After numerous attempts to contact them I was able to get another controller on 121.5. While the other controller was looking for our frequency I received a call on our original frequency. ATC claimed that they had been trying to contact us for the last 60 miles. They got us on the correct frequency. I'm still not sure what happened. I sincerely believe that we did not receive any transmissions. There was some military action in the area; GPS jamming; and a number of aircraft including us has our GPS signals interrupted; and I wonder if that had something to do with blocking transmissions. Also ATC sometimes uses transmitters that are too far away from our aircraft to hear. I wonder if this had been the case when they were trying to contact us. This might have been my fault; but I don't think so. I think that ATC should be more aggressive when they are trying to contact an airplane. They should use the other aircraft around them to try to raise the missing flight. Also [ATC] center's should monitor 121.5! I had a heck of time trying to get someone to respond on that frequency! It would be cool also if our release contained a list of expected frequencies that would be used during our flight.

Related reports:

Google
 

Original NASA ASRS Text

Title: CRJ700 flight crew is advised by ATC of GPS jamming ahead. When the jamming is encountered not only does the GPS fail but so does the FMC and VHF. Lost communication results in a late descent clearance for landing.

Narrative: We were flying along; and noticed that we were getting high for our approach. I contacted ATC who did not respond. Our last transmission was as clear as a bell; and had been about 10 or 15 minutes ago. After numerous attempts to contact them I was able to get another Controller on 121.5. While the other Controller was looking for our frequency I received a call on our original frequency. ATC claimed that they had been trying to contact us for the last 60 miles. They got us on the correct frequency. I'm still not sure what happened. I sincerely believe that we did not receive any transmissions. There was some military action in the area; GPS jamming; and a number of aircraft including us has our GPS signals interrupted; and I wonder if that had something to do with blocking transmissions. Also ATC sometimes uses transmitters that are too far away from our aircraft to hear. I wonder if this had been the case when they were trying to contact us. This might have been my fault; but I don't think so. I think that ATC should be more aggressive when they are trying to contact an airplane. They should use the other aircraft around them to try to raise the missing flight. Also [ATC] center's should monitor 121.5! I had a heck of time trying to get someone to respond on that frequency! It would be cool also if our release contained a list of expected frequencies that would be used during our flight.

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.