Pilot of C172 encounters turbulent air during approach to uncharted airport 10 southwest of abi.

Attributes
ACN	645270
Time
Date	200501
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dys.airport
State Reference	TX
Altitude	agl single value : 200
Environment
Flight Conditions	VMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : abi.tracon
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 1600 flight time type : 1200
ASRS Report	645270
Events
Anomaly	inflight encounter : turbulence inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment
Supplementary
Problem Areas	Flight Crew Human Performance Weather Airport Environmental Factor
Primary Problem	Weather

Narrative:

At about XA10; I entered a left downwind for runway 35 at halla's field and made a fairly smooth approach and landing. I taxied over to pick up my client and back-taxied to runway 35. During climb out after takeoff roll on runway 35 at halla's field; I encountered a sudden environment change to moderate to severe turbulence accompanied by an apparent vortex possibly caused by a wind turbine located 6000 ft north of the end of runway 35 and 600 ft west of the extended centerline of the runway. Winds according to the abilene ATIS were 020 degrees at 20 KTS gusting to 30 KTS. This occurred at 200 ft above the runway surface and changed the condition of flight from smooth to very turbulent accompanied by a roll of the aircraft to the left. I counteracted by leveling the aircraft to increase airspeed to maneuvering speed and by applying full aileron deflection and associated rudder deflection to the right. I was able to eventually change the heading to produce an east ground track perpendicular to the runway centerline. After I had departed the rough air; I resumed climb to 3100 ft MSL and proceeded with my assignment. At the end of the assignment; I entered a right base for a fairly smooth approach and landing on runway 35. I chose right traffic in the interest of safety since it kept me at the furthest distance from the wind turbines.

Original NASA ASRS Text

Title: PLT OF C172 ENCOUNTERS TURBULENT AIR DURING APCH TO UNCHARTED ARPT 10 SW OF ABI.

Narrative: AT ABOUT XA10; I ENTERED A L DOWNWIND FOR RWY 35 AT HALLA'S FIELD AND MADE A FAIRLY SMOOTH APCH AND LNDG. I TAXIED OVER TO PICK UP MY CLIENT AND BACK-TAXIED TO RWY 35. DURING CLBOUT AFTER TKOF ROLL ON RWY 35 AT HALLA'S FIELD; I ENCOUNTERED A SUDDEN ENVIRONMENT CHANGE TO MODERATE TO SEVERE TURB ACCOMPANIED BY AN APPARENT VORTEX POSSIBLY CAUSED BY A WIND TURBINE LOCATED 6000 FT N OF THE END OF RWY 35 AND 600 FT W OF THE EXTENDED CTRLINE OF THE RWY. WINDS ACCORDING TO THE ABILENE ATIS WERE 020 DEGS AT 20 KTS GUSTING TO 30 KTS. THIS OCCURRED AT 200 FT ABOVE THE RWY SURFACE AND CHANGED THE CONDITION OF FLT FROM SMOOTH TO VERY TURBULENT ACCOMPANIED BY A ROLL OF THE ACFT TO THE L. I COUNTERACTED BY LEVELING THE ACFT TO INCREASE AIRSPD TO MANEUVERING SPD AND BY APPLYING FULL AILERON DEFLECTION AND ASSOCIATED RUDDER DEFLECTION TO THE R. I WAS ABLE TO EVENTUALLY CHANGE THE HDG TO PRODUCE AN E GND TRACK PERPENDICULAR TO THE RWY CTRLINE. AFTER I HAD DEPARTED THE ROUGH AIR; I RESUMED CLB TO 3100 FT MSL AND PROCEEDED WITH MY ASSIGNMENT. AT THE END OF THE ASSIGNMENT; I ENTERED A R BASE FOR A FAIRLY SMOOTH APCH AND LNDG ON RWY 35. I CHOSE R TFC IN THE INTEREST OF SAFETY SINCE IT KEPT ME AT THE FURTHEST DISTANCE FROM THE WIND TURBINES.

Data retrieved from NASA's ASRS site as of January 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.