While practicing accelerated stalls in an small aircraft high wing, pilot inadvertently allowed the aircraft to roll onto its back. Recovery accomplished with loss of altitude and heading change.

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Attributes
ACN	119615
Time
Date	198908
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : drk airport : prc
State Reference	AZ
Altitude	msl bound lower : 9500 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : prc artcc : zma
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 10 flight time total : 440 flight time type : 200
ASRS Report	119615
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : far other anomaly
Independent Detector	other other : unspecified cockpit
Resolutory Action	flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While practicing accelerated stalls to the right, the airplane stalled suddenly, rolled over on its back in a partly inverted position. I applied corrective action and regained straight and level flight at approximately 4000' AGL. Several hundred feet of altitude were lost as well as a significant change in heading. At no time were excessive loads or airspeeds imposed on the aircraft. I feel better control coordination and pilot judgement on recovery could have prevented this situation. However, the resulting stunting was no intentional.

Original NASA ASRS Text

Title: WHILE PRACTICING ACCELERATED STALLS IN AN SMA HIGH WING, PLT INADVERTENTLY ALLOWED THE ACFT TO ROLL ONTO ITS BACK. RECOVERY ACCOMPLISHED WITH LOSS OF ALT AND HEADING CHANGE.

Narrative: WHILE PRACTICING ACCELERATED STALLS TO THE RIGHT, THE AIRPLANE STALLED SUDDENLY, ROLLED OVER ON ITS BACK IN A PARTLY INVERTED POSITION. I APPLIED CORRECTIVE ACTION AND REGAINED STRAIGHT AND LEVEL FLT AT APPROX 4000' AGL. SEVERAL HUNDRED FEET OF ALT WERE LOST AS WELL AS A SIGNIFICANT CHANGE IN HDG. AT NO TIME WERE EXCESSIVE LOADS OR AIRSPEEDS IMPOSED ON THE ACFT. I FEEL BETTER CONTROL COORD AND PLT JUDGEMENT ON RECOVERY COULD HAVE PREVENTED THIS SITUATION. HOWEVER, THE RESULTING STUNTING WAS NO INTENTIONAL.

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