Narrative:

On approach to sdl, we were being vectored across the top of phx when our radio system in the westwind that has only 1 punch pad crossed frequencys, from communication #1 to communication #2. In the process, the active approach frequency was lost and we were on wrong frequency for approximately 1-2 mins before we were able to get the right frequency back and into the radio. Upon recontacting approach, they said nothing accept where the airport is and when we called in sight, they cleared us for a visual and frequency change to tower. Nothing was said and we saw no conflicting traffic but I believed that we missed a call or 2 in process until we contacted them. Don't know of any conflicts but not sure because re-contact with approach was brief.

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Original NASA ASRS Text

Title: WW-24 CREW LOST COM WITH THE P50 APCH CTLR BECAUSE THE COM FREQ WAS LOST AS THE SINGLE COM HEAD WAS XFERRED FROM COM #1 TO COM #2.

Narrative: ON APCH TO SDL, WE WERE BEING VECTORED ACROSS THE TOP OF PHX WHEN OUR RADIO SYS IN THE WESTWIND THAT HAS ONLY 1 PUNCH PAD CROSSED FREQS, FROM COM #1 TO COM #2. IN THE PROCESS, THE ACTIVE APCH FREQ WAS LOST AND WE WERE ON WRONG FREQ FOR APPROX 1-2 MINS BEFORE WE WERE ABLE TO GET THE RIGHT FREQ BACK AND INTO THE RADIO. UPON RECONTACTING APCH, THEY SAID NOTHING ACCEPT WHERE THE ARPT IS AND WHEN WE CALLED IN SIGHT, THEY CLRED US FOR A VISUAL AND FREQ CHANGE TO TWR. NOTHING WAS SAID AND WE SAW NO CONFLICTING TFC BUT I BELIEVED THAT WE MISSED A CALL OR 2 IN PROCESS UNTIL WE CONTACTED THEM. DON'T KNOW OF ANY CONFLICTS BUT NOT SURE BECAUSE RE-CONTACT WITH APCH WAS BRIEF.

Data retrieved from NASA's ASRS site as of July 2007 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.