Narrative:

I was conducting an IFR approach to jwn airport under VMC to about 5 mi north of airport, where ATC advised 2 airplanes in pattern at jwn. I had jwn in sight, so I canceled my IFR flight plan, tuned radio to local CTAF frequency of 122.7. Mistake was radio actually tuned to 127.7. I made 2 calls, including my position, request for traffic and received no response. I assumed other traffic was now clear, so I proceeded straight-in runway 19 for which my ILS runway 19 approach had me aligned. I landed in the first 1000 ft and proceeded to taxi to the taxiway at approximately 2500 ft (center of runway), where I saw a cessna 150 turning off the runway onto the taxiway. I had landed behind the cessna, before he was clear of runway. P.south. Spoke with cessna pilot and apologized.

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Original NASA ASRS Text

Title: PLT OF A PIPER PA28 LANDS WHILE A C150 IS ROLLING OUT, AFTER LNDG, AT AN UNCTLED ARPT.

Narrative: I WAS CONDUCTING AN IFR APCH TO JWN ARPT UNDER VMC TO ABOUT 5 MI N OF ARPT, WHERE ATC ADVISED 2 AIRPLANES IN PATTERN AT JWN. I HAD JWN IN SIGHT, SO I CANCELED MY IFR FLT PLAN, TUNED RADIO TO LCL CTAF FREQ OF 122.7. MISTAKE WAS RADIO ACTUALLY TUNED TO 127.7. I MADE 2 CALLS, INCLUDING MY POS, REQUEST FOR TFC AND RECEIVED NO RESPONSE. I ASSUMED OTHER TFC WAS NOW CLR, SO I PROCEEDED STRAIGHT-IN RWY 19 FOR WHICH MY ILS RWY 19 APCH HAD ME ALIGNED. I LANDED IN THE FIRST 1000 FT AND PROCEEDED TO TAXI TO THE TXWY AT APPROX 2500 FT (CTR OF RWY), WHERE I SAW A CESSNA 150 TURNING OFF THE RWY ONTO THE TXWY. I HAD LANDED BEHIND THE CESSNA, BEFORE HE WAS CLR OF RWY. P.S. SPOKE WITH CESSNA PLT AND APOLOGIZED.

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.