Altitude deviation climb caused by turbulence.

Attributes
ACN	301170
Time
Date	199504
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 9500 msl bound upper : 9900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : las
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 25 flight time total : 1000 flight time type : 800
ASRS Report	301170
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter other non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 200
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

While flying at 9500 ft VFR on top, turbulence conditions caused my aircraft to rise to almost 10000 ft. I was being followed by a faster aircraft at 10000 ft. An airmet for turbulence conditions was in effect. Slightly different directional vectors could have reduced the chance of a mishap, as both planes were being vectored when this occurred.

Original NASA ASRS Text

Title: ALTDEV CLB CAUSED BY TURB.

Narrative: WHILE FLYING AT 9500 FT VFR ON TOP, TURB CONDITIONS CAUSED MY ACFT TO RISE TO ALMOST 10000 FT. I WAS BEING FOLLOWED BY A FASTER ACFT AT 10000 FT. AN AIRMET FOR TURB CONDITIONS WAS IN EFFECT. SLIGHTLY DIFFERENT DIRECTIONAL VECTORS COULD HAVE REDUCED THE CHANCE OF A MISHAP, AS BOTH PLANES WERE BEING VECTORED WHEN THIS OCCURRED.

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.