Narrative:

During taxiout from gate to runway 13 at lga, we had #1 VHF set up with tower on the left head and ground on the right. When approaching runway 13 for takeoff, the first officer switched to tower. Normal procedure at this point is to replace ground frequency with departure control frequency. For unknown reasons he didn't do it, and I didn't catch it. Upon liftoff the tower controller switched us over to departure. As in my usual practice, I keep my head out of the cockpit to look for traffic and FLIP the toggle west/O looking. In this case, it was back to ground. I called our flight # and out of 500 for 5000'. After a 10 second pause, a controller responded with, 'say again.' I then reported out of 1500 for 5000'. There was no response to our flight #, but I heard the controller talking with other flts. I just assumed she was busy. This is not unusual for ny departure during their busier times. We continued with our departure clearance. After 3-4 mins, we heard the same controller call our flight #, followed immediately by a different controller, probably a supervisor, informing us to switch to the departure control frequency of 120.4. I looked down for the first time and saw the mistake. Lesson learned: check for the correct departure frequency in the next control head as part of my takeoff scan.

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Original NASA ASRS Text

Title: ACR MLG FLT CREW INADVERTENTLY SELECTS GND CTL FREQ INSTEAD OF DEP CTL FREQ ON DEP FROM LGA.

Narrative: DURING TAXIOUT FROM GATE TO RWY 13 AT LGA, WE HAD #1 VHF SET UP WITH TWR ON THE LEFT HEAD AND GND ON THE RIGHT. WHEN APCHING RWY 13 FOR TKOF, THE F/O SWITCHED TO TWR. NORMAL PROC AT THIS POINT IS TO REPLACE GND FREQ WITH DEP CTL FREQ. FOR UNKNOWN REASONS HE DIDN'T DO IT, AND I DIDN'T CATCH IT. UPON LIFTOFF THE TWR CTLR SWITCHED US OVER TO DEP. AS IN MY USUAL PRACTICE, I KEEP MY HEAD OUT OF THE COCKPIT TO LOOK FOR TFC AND FLIP THE TOGGLE W/O LOOKING. IN THIS CASE, IT WAS BACK TO GND. I CALLED OUR FLT # AND OUT OF 500 FOR 5000'. AFTER A 10 SEC PAUSE, A CTLR RESPONDED WITH, 'SAY AGAIN.' I THEN RPTED OUT OF 1500 FOR 5000'. THERE WAS NO RESPONSE TO OUR FLT #, BUT I HEARD THE CTLR TALKING WITH OTHER FLTS. I JUST ASSUMED SHE WAS BUSY. THIS IS NOT UNUSUAL FOR NY DEP DURING THEIR BUSIER TIMES. WE CONTINUED WITH OUR DEP CLRNC. AFTER 3-4 MINS, WE HEARD THE SAME CTLR CALL OUR FLT #, FOLLOWED IMMEDIATELY BY A DIFFERENT CTLR, PROBABLY A SUPVR, INFORMING US TO SWITCH TO THE DEP CTL FREQ OF 120.4. I LOOKED DOWN FOR THE FIRST TIME AND SAW THE MISTAKE. LESSON LEARNED: CHK FOR THE CORRECT DEP FREQ IN THE NEXT CTL HEAD AS PART OF MY TKOF SCAN.

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.