<< >> NASA ASRS Report 743423, June 2007

An experimental aircraft pilot reports that during takeoff roll the aircraft pitched up uncommanded. He pulled power forcing the aircraft to the ground and causing damage.

Attributes
ACN	743423
Time
Date	200706
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Amateur (Home) Built
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 10 flight time total : 370 flight time type : 124
ASRS Report	743423
Events
Anomaly	aircraft equipment problem : critical excursion : runway other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During takeoff acceleration roll; and following a normal preflight check; the aircraft suddenly nosed up and left the ground. The PIC immediately pulled power; causing the aircraft to impact hard on its l-hand main gear. This deflected the aircraft to the right; causing it to leave the runway and roll along the grass; clipping several runway lights. Control was quickly regained and the aircraft taxied back to the hangar. No injuries occurred; but some sheet metal damage occurred to the aircraft.

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Original NASA ASRS Text

Title: AN EXPERIMENTAL ACFT PILOT REPORTS THAT DURING TKOF ROLL THE ACFT PITCHED UP UNCOMMANDED. HE PULLED POWER FORCING THE ACFT TO THE GND AND CAUSING DAMAGE.

Narrative: DURING TKOF ACCELERATION ROLL; AND FOLLOWING A NORMAL PREFLT CHK; THE ACFT SUDDENLY NOSED UP AND LEFT THE GND. THE PIC IMMEDIATELY PULLED PWR; CAUSING THE ACFT TO IMPACT HARD ON ITS L-HAND MAIN GEAR. THIS DEFLECTED THE ACFT TO THE R; CAUSING IT TO LEAVE THE RWY AND ROLL ALONG THE GRASS; CLIPPING SEVERAL RWY LIGHTS. CTL WAS QUICKLY REGAINED AND THE ACFT TAXIED BACK TO THE HANGAR. NO INJURIES OCCURRED; BUT SOME SHEET METAL DAMAGE OCCURRED TO THE ACFT.

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.