C152 leaves class C airspace after tuning wrong frequency for contact with ATC.

Attributes
ACN	456210
Time
Date	199912
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cmh.airport
State Reference	OH
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cmh.tracon tower : osu.tower
Operator	general aviation : personal
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 177 flight time type : 150
ASRS Report	456210
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	airspace violation : entry non adherence : clearance non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On a cross country flight from osu airport to highland county airport, I skimmed port columbus airport class C airspace. I was in communication with columbus approach (the osu tower instructed me to call columbus approach) and entered the transponder frequency columbus approach gave me. I was told to switch frequencys and contact columbus approach on the new frequency. When I switched to the new frequency, I could not contact columbus approach. Since I was by now well outside the columbus airport class C airspace, I assumed I no longer was required to contact them. I now realize that I put in the wrong new frequency, and that I should have tried to call columbus approach again on the old frequency, rather than assume it was no longer necessary to communicate with them.

Original NASA ASRS Text

Title: C152 LEAVES CLASS C AIRSPACE AFTER TUNING WRONG FREQ FOR CONTACT WITH ATC.

Narrative: ON A XCOUNTRY FLT FROM OSU ARPT TO HIGHLAND COUNTY ARPT, I SKIMMED PORT COLUMBUS ARPT CLASS C AIRSPACE. I WAS IN COM WITH COLUMBUS APCH (THE OSU TWR INSTRUCTED ME TO CALL COLUMBUS APCH) AND ENTERED THE XPONDER FREQ COLUMBUS APCH GAVE ME. I WAS TOLD TO SWITCH FREQS AND CONTACT COLUMBUS APCH ON THE NEW FREQ. WHEN I SWITCHED TO THE NEW FREQ, I COULD NOT CONTACT COLUMBUS APCH. SINCE I WAS BY NOW WELL OUTSIDE THE COLUMBUS ARPT CLASS C AIRSPACE, I ASSUMED I NO LONGER WAS REQUIRED TO CONTACT THEM. I NOW REALIZE THAT I PUT IN THE WRONG NEW FREQ, AND THAT I SHOULD HAVE TRIED TO CALL COLUMBUS APCH AGAIN ON THE OLD FREQ, RATHER THAN ASSUME IT WAS NO LONGER NECESSARY TO COMMUNICATE WITH THEM.

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.