Narrative:

I had planned a flight that would include touch and goes at 5 airports in the local vicinity. As part of my flight planning I had written down the names and frequencys of the various airports in the order that I would be contacting them. The first frequency on the list was for the tower at pdx. I needed to contact them first because I wished to go through the arsa en route to my first destination which was ttd. While on the ground at 60S, my departure airport, I contacted pdx tower requesting permission to transit the arsa on the north bank of the columbia river en route to ttd. I was given a squawk and was told to identify when airborne. I then returned to the unicom frequency for pearson to announce my departure. Once I was established on my downwind departure heading I idented and dialed in the frequency of what I thought was pdx tower (my radio can only select 1 frequency at a time). However, I looked at the wrong frequency on my list and dialed in the frequency for ttd tower instead. I've made this transition through the arsa many times and I thought it strange that no one from pdx tower was talking to me. I called the tower verifying that I had permission to transit the arsa on the north bank of the river. Again, I thought it was strange that the tower who responded to my call didn't seem to be aware of what I was doing and even asked if I was sure I had been talking to pdx tower. I said yes, that I had been given a squawk code while on the ground at pearson. I was then given the altimeter and wind information at ttd and told which entry to expect at ttd. It wasn't until I was nearly at ttd that I looked at my frequency list and at the frequency I had dialed in on the radio that I realized what I had done. Fully expecting to be told to make a full stop landing at ttd and call the pdx tower I continued on to ttd, but there were no repercussions as a result of my error. What I will do differently next time: be aware of how easy it is to enter the wrong frequency. Check my list more closely and verify I have the correct frequency on the radio. If something doesn't seem right, be a little more persistent in verifying there is a problem. I assumed I was talking to pdx and never heard the name troutdale in the first series of xmissions I made with ttd. I heard what I expected I was going to hear. I will listen more closely.

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Original NASA ASRS Text

Title: UNAUTH PENETRATION OF AIRSPACE. PROX OF ARSA ATA.

Narrative: I HAD PLANNED A FLT THAT WOULD INCLUDE TOUCH AND GOES AT 5 ARPTS IN THE LCL VICINITY. AS PART OF MY FLT PLANNING I HAD WRITTEN DOWN THE NAMES AND FREQS OF THE VARIOUS ARPTS IN THE ORDER THAT I WOULD BE CONTACTING THEM. THE FIRST FREQ ON THE LIST WAS FOR THE TWR AT PDX. I NEEDED TO CONTACT THEM FIRST BECAUSE I WISHED TO GO THROUGH THE ARSA ENRTE TO MY FIRST DEST WHICH WAS TTD. WHILE ON THE GND AT 60S, MY DEP ARPT, I CONTACTED PDX TWR REQUESTING PERMISSION TO TRANSIT THE ARSA ON THE N BANK OF THE COLUMBIA RIVER ENRTE TO TTD. I WAS GIVEN A SQUAWK AND WAS TOLD TO IDENT WHEN AIRBORNE. I THEN RETURNED TO THE UNICOM FREQ FOR PEARSON TO ANNOUNCE MY DEP. ONCE I WAS ESTABLISHED ON MY DOWNWIND DEP HDG I IDENTED AND DIALED IN THE FREQ OF WHAT I THOUGHT WAS PDX TWR (MY RADIO CAN ONLY SELECT 1 FREQ AT A TIME). HOWEVER, I LOOKED AT THE WRONG FREQ ON MY LIST AND DIALED IN THE FREQ FOR TTD TWR INSTEAD. I'VE MADE THIS TRANSITION THROUGH THE ARSA MANY TIMES AND I THOUGHT IT STRANGE THAT NO ONE FROM PDX TWR WAS TALKING TO ME. I CALLED THE TWR VERIFYING THAT I HAD PERMISSION TO TRANSIT THE ARSA ON THE N BANK OF THE RIVER. AGAIN, I THOUGHT IT WAS STRANGE THAT THE TWR WHO RESPONDED TO MY CALL DIDN'T SEEM TO BE AWARE OF WHAT I WAS DOING AND EVEN ASKED IF I WAS SURE I HAD BEEN TALKING TO PDX TWR. I SAID YES, THAT I HAD BEEN GIVEN A SQUAWK CODE WHILE ON THE GND AT PEARSON. I WAS THEN GIVEN THE ALTIMETER AND WIND INFO AT TTD AND TOLD WHICH ENTRY TO EXPECT AT TTD. IT WASN'T UNTIL I WAS NEARLY AT TTD THAT I LOOKED AT MY FREQ LIST AND AT THE FREQ I HAD DIALED IN ON THE RADIO THAT I REALIZED WHAT I HAD DONE. FULLY EXPECTING TO BE TOLD TO MAKE A FULL STOP LNDG AT TTD AND CALL THE PDX TWR I CONTINUED ON TO TTD, BUT THERE WERE NO REPERCUSSIONS AS A RESULT OF MY ERROR. WHAT I WILL DO DIFFERENTLY NEXT TIME: BE AWARE OF HOW EASY IT IS TO ENTER THE WRONG FREQ. CHK MY LIST MORE CLOSELY AND VERIFY I HAVE THE CORRECT FREQ ON THE RADIO. IF SOMETHING DOESN'T SEEM RIGHT, BE A LITTLE MORE PERSISTENT IN VERIFYING THERE IS A PROB. I ASSUMED I WAS TALKING TO PDX AND NEVER HEARD THE NAME TROUTDALE IN THE FIRST SERIES OF XMISSIONS I MADE WITH TTD. I HEARD WHAT I EXPECTED I WAS GOING TO HEAR. I WILL LISTEN MORE CLOSELY.

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.