Narrative:

Our descent clearance from ATC was pilot's discretion to 6000 ft MSL. We were up at FL350 and it was late at night with only our aircraft on frequency that I could tell. When we started down out of FL350; the captain called center and said that we were leaving FL350. We heard no response from the controller; which in my mind was not unusual seeing how it was so late. I think it was around FL270 that we got a call from center that said 'company flt # are you up?' the captain responded that we were and he informed us that we had a stuck mic for quite a while and he was trying to get ahold of us to level us off because he had traffic that had taken off from another airport that could have been a conflict with us. He informed us that everything was just fine and that he moved the other aircraft instead of leveling us off. The captain apologized to him and asked him if he heard anything bad from us while we had a stuck mic and he laughed and said; 'no' and he was not ready to call out the fighters just yet. The captain asked him again if he was sure we were not in trouble and he said; 'there was no problem and don't worry.' after this we tried to figure out the stuck mic issue and I figured it was coming from my side due to my knee hitting the mic switch. I had my right leg up on the foot rest and my knee was keying the hand mic that was underneath my release.

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Original NASA ASRS Text

Title: B737 First Officer is informed by ATC during descent that his flight had caused a stuck Mic on frequency but all was well now.

Narrative: Our descent clearance from ATC was Pilot's discretion to 6000 FT MSL. We were up at FL350 and it was late at night with only our aircraft on frequency that I could tell. When we started down out of FL350; the Captain called Center and said that we were leaving FL350. We heard no response from the Controller; which in my mind was not unusual seeing how it was so late. I think it was around FL270 that we got a call from Center that said 'Company flt # are you up?' The Captain responded that we were and he informed us that we had a stuck Mic for quite a while and he was trying to get ahold of us to level us off because he had traffic that had taken off from another airport that could have been a conflict with us. He informed us that everything was just fine and that he moved the other aircraft instead of leveling us off. The Captain apologized to him and asked him if he heard anything bad from us while we had a stuck Mic and he laughed and said; 'No' and he was not ready to call out the fighters just yet. The Captain asked him again if he was sure we were not in trouble and he said; 'There was no problem and don't worry.' After this we tried to figure out the stuck Mic issue and I figured it was coming from my side due to my knee hitting the Mic switch. I had my right leg up on the foot rest and my knee was keying the hand Mic that was underneath my release.

Data retrieved from NASA's ASRS site as of April 2012 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.