Narrative:

Entered the downwind at the ZZZ airport unaware that the tower was in operation and had dialed in the wrong radio frequency. Traffic was observed on final and holding short for departure. Maintained adequate spacing while broadcasting intentions over my radio and landed uneventfully on runway xx clearing the active at the first taxiway. Ground taxi to park I was given green light gun signals from the tower authorizing clearance to cross the crossing runway and once parked I headed to the tower to talk to the controller. I told him I had been to ZZZ once before; yrs ago and that my GPS database showed 122.7 as the frequency. He advised of the changes and gave me the correct frequencys for departure. I apologized; filled up my tanks with fuel and departed after the tower was closed; using the appropriate ground and CTAF frequencys. Neglected to maintain up to date data in my GPS database and did not review ZZZ sectional prior to arrival. Negative radio responses while broadcasting in the blind should have been an indication that something was wrong. My best option would have been to depart the traffic area; make a call to another pilot on my frequency who possibly could have advised me or reviewed my own sectional. This incident highlighted the necessity to be disciplined in proper airport environment procedures; review of the airmen information manual and proper preflight planning while considering a contingency of radio out procedures. I missed it all and am quite embarrassed to have enough experience to adequately know better.

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Original NASA ASRS Text

Title: THE PILOT OF A LIGHT AIRCRAFT ENTERED THE TRAFFIC PATTERN OF A TOWER CONTROLLED AIRPORT AND LANDED WITHOUT CLEARANCE BECAUSE HIS GPS NAV DATABASE WAS OUT OF DATE.

Narrative: ENTERED THE DOWNWIND AT THE ZZZ ARPT UNAWARE THAT THE TWR WAS IN OP AND HAD DIALED IN THE WRONG RADIO FREQ. TFC WAS OBSERVED ON FINAL AND HOLDING SHORT FOR DEP. MAINTAINED ADEQUATE SPACING WHILE BROADCASTING INTENTIONS OVER MY RADIO AND LANDED UNEVENTFULLY ON RWY XX CLRING THE ACTIVE AT THE FIRST TXWY. GND TAXI TO PARK I WAS GIVEN GREEN LIGHT GUN SIGNALS FROM THE TWR AUTHORIZING CLRNC TO CROSS THE XING RWY AND ONCE PARKED I HEADED TO THE TWR TO TALK TO THE CTLR. I TOLD HIM I HAD BEEN TO ZZZ ONCE BEFORE; YRS AGO AND THAT MY GPS DATABASE SHOWED 122.7 AS THE FREQ. HE ADVISED OF THE CHANGES AND GAVE ME THE CORRECT FREQS FOR DEP. I APOLOGIZED; FILLED UP MY TANKS WITH FUEL AND DEPARTED AFTER THE TWR WAS CLOSED; USING THE APPROPRIATE GND AND CTAF FREQS. NEGLECTED TO MAINTAIN UP TO DATE DATA IN MY GPS DATABASE AND DID NOT REVIEW ZZZ SECTIONAL PRIOR TO ARR. NEGATIVE RADIO RESPONSES WHILE BROADCASTING IN THE BLIND SHOULD HAVE BEEN AN INDICATION THAT SOMETHING WAS WRONG. MY BEST OPTION WOULD HAVE BEEN TO DEPART THE TFC AREA; MAKE A CALL TO ANOTHER PLT ON MY FREQ WHO POSSIBLY COULD HAVE ADVISED ME OR REVIEWED MY OWN SECTIONAL. THIS INCIDENT HIGHLIGHTED THE NECESSITY TO BE DISCIPLINED IN PROPER ARPT ENVIRONMENT PROCS; REVIEW OF THE AIRMEN INFO MANUAL AND PROPER PREFLT PLANNING WHILE CONSIDERING A CONTINGENCY OF RADIO OUT PROCS. I MISSED IT ALL AND AM QUITE EMBARRASSED TO HAVE ENOUGH EXPERIENCE TO ADEQUATELY KNOW BETTER.

Data retrieved from NASA's ASRS site as of May 2009 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.