Small aircraft has radio problems, enters class C airspace without clearance.

Attributes
ACN	282901
Time
Date	199409
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tlh
State Reference	FL
Altitude	msl bound lower : 4500 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tlh tower : tlh tower : rdu
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time total : 218
ASRS Report	282901
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

I departed from (tma) tifton, GA, airport in route to pick up a friend's daughter in sylvester, GA (syv), and fly her to tallahassee, fl, to board a flight to baltimore, md. At both times my radios were working on departure. When I flew over cario, GA, I changed my frequency to tallahassee, fl, unicom and when I got approximately 20-25 mi out I began calling (tlh) approach (no response). I tried ground control (no response). I tried unicom (no response). By that time I was over tallahassee (tlh) airport I knew I had radio problems and there was an avionics shop there. With my friend's daughter flying with me and my radios out, I elected to land on runway 90. I made a wide go around west of the airport to search for traffic. I saw no danger and I landed. When I went to the ramp to call the tower and explain what I did, they said I had garble in my radio transmission, I also heard garble on my end and assumed they could hear me. After our conversation, the avionics shop checked my radio. I was able to talk to the tower and ground control, but after I departed from tlh I squawked a frequency and they told me then I had no mode C and not to return to tlh unless it was repaired. Please understand my radios were in working order until I approached (tlh) airspace. The airplane I was flying belongs to mr X. He had just had an annual done and everything was in working order. Mr X is fully aware of the radio problem and the radio is being repaired today.

Original NASA ASRS Text

Title: SMA HAS RADIO PROBS, ENTERS CLASS C AIRSPACE WITHOUT CLRNC.

Narrative: I DEPARTED FROM (TMA) TIFTON, GA, ARPT IN RTE TO PICK UP A FRIEND'S DAUGHTER IN SYLVESTER, GA (SYV), AND FLY HER TO TALLAHASSEE, FL, TO BOARD A FLT TO BALTIMORE, MD. AT BOTH TIMES MY RADIOS WERE WORKING ON DEP. WHEN I FLEW OVER CARIO, GA, I CHANGED MY FREQ TO TALLAHASSEE, FL, UNICOM AND WHEN I GOT APPROX 20-25 MI OUT I BEGAN CALLING (TLH) APCH (NO RESPONSE). I TRIED GND CTL (NO RESPONSE). I TRIED UNICOM (NO RESPONSE). BY THAT TIME I WAS OVER TALLAHASSEE (TLH) ARPT I KNEW I HAD RADIO PROBS AND THERE WAS AN AVIONICS SHOP THERE. WITH MY FRIEND'S DAUGHTER FLYING WITH ME AND MY RADIOS OUT, I ELECTED TO LAND ON RWY 90. I MADE A WIDE GAR W OF THE ARPT TO SEARCH FOR TFC. I SAW NO DANGER AND I LANDED. WHEN I WENT TO THE RAMP TO CALL THE TWR AND EXPLAIN WHAT I DID, THEY SAID I HAD GARBLE IN MY RADIO XMISSION, I ALSO HEARD GARBLE ON MY END AND ASSUMED THEY COULD HEAR ME. AFTER OUR CONVERSATION, THE AVIONICS SHOP CHKED MY RADIO. I WAS ABLE TO TALK TO THE TWR AND GND CTL, BUT AFTER I DEPARTED FROM TLH I SQUAWKED A FREQ AND THEY TOLD ME THEN I HAD NO MODE C AND NOT TO RETURN TO TLH UNLESS IT WAS REPAIRED. PLEASE UNDERSTAND MY RADIOS WERE IN WORKING ORDER UNTIL I APCHED (TLH) AIRSPACE. THE AIRPLANE I WAS FLYING BELONGS TO MR X. HE HAD JUST HAD AN ANNUAL DONE AND EVERYTHING WAS IN WORKING ORDER. MR X IS FULLY AWARE OF THE RADIO PROB AND THE RADIO IS BEING REPAIRED TODAY.

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.