Small transport has altitude deviation creating less than standard separation.

Attributes
ACN	283046
Time
Date	199409
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 10000 msl bound upper : 10800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : ztl
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11479 flight time type : 150
ASRS Report	283046
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : weather non adherence : clearance non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was coming direct from brunswick, GA, or jekell island to knoxville, tn. I was cleared to 10000 ft. I asked for 11000 or 12000 ft. The WX was really turbulence. We were headed straight for a big thunderhead, but I could see for at least 10 mi in any direction except straight ahead. The controller said he would have a higher altitude soon. I inadvertently got too high in order to stay VFR, but the WX was blowing us around terrible. I got caught in some very turbulence WX. I should have told the controller sooner, but thought I could get around the big buildup. I didn't have radar or a storm scope and I had to try to avoid going into the thunder bumper. Next time if I get in turbulence conditions, I will tell the controller very soon, I am off altitude. The FAA is sending me a letter. They want a response soon. I'm also a crop duster. I just got through with 3 months of heavy work crop dusting in arkansas. Callback conversation with reporter revealed the following information: reporter states he has talked to FAA and has been directed to situation in the radar room and watch the near miss sits. Then he must go to FSDO and discuss follow-up. Analyst advised him to indicate he has filed ASRS report. He was assigned 10000 ft and climbed to 10900 ft when controller contacted him. Reporter never saw any other traffic and stated it was really clear VFR.

Original NASA ASRS Text

Title: SMT HAS ALTDEV CREATING LTSS.

Narrative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

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.