<< >> NASA ASRS Report 325100, January 1996

Pilot of an small aircraft sel tailwheel lost control during a static engine run-up when the left brake failed to hold, causing the aircraft to run off side of the taxiway and damage the tailwheel.

Attributes
ACN	325100
Time
Date	199601
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : 5g9
State Reference	OH
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	ground : holding ground other : taxi
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 1900 flight time type : 800
ASRS Report	325100
Events
Anomaly	aircraft equipment problem : less severe other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While run-up was being performed to warm engine, brake on left side failed completely causing unstoppable right turn. As engine slowed, airplane veered to right and exited taxiway. Upon leaving taxiway and entering approximately 4-5 inches of hard snow, tail came off ground. As I brought the tail down, the right turn and momentum resulted in a hard return of the wheel onto the ground. Upon postflt inspection tailwheel appeared slightly bent but not extremely offset from normal. Loss of brake control along with hard pack snow contributed to incident. Intent of engine run-up was to taxi over and fill tanks for return to hangar (in order to prevent condensation over week).

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Original NASA ASRS Text

Title: PLT OF AN SMA SEL TAILWHEEL LOST CTL DURING A STATIC ENG RUN-UP WHEN THE L BRAKE FAILED TO HOLD, CAUSING THE ACFT TO RUN OFF SIDE OF THE TXWY AND DAMAGE THE TAILWHEEL.

Narrative: WHILE RUN-UP WAS BEING PERFORMED TO WARM ENG, BRAKE ON L SIDE FAILED COMPLETELY CAUSING UNSTOPPABLE R TURN. AS ENG SLOWED, AIRPLANE VEERED TO R AND EXITED TXWY. UPON LEAVING TXWY AND ENTERING APPROX 4-5 INCHES OF HARD SNOW, TAIL CAME OFF GND. AS I BROUGHT THE TAIL DOWN, THE R TURN AND MOMENTUM RESULTED IN A HARD RETURN OF THE WHEEL ONTO THE GND. UPON POSTFLT INSPECTION TAILWHEEL APPEARED SLIGHTLY BENT BUT NOT EXTREMELY OFFSET FROM NORMAL. LOSS OF BRAKE CTL ALONG WITH HARD PACK SNOW CONTRIBUTED TO INCIDENT. INTENT OF ENG RUN-UP WAS TO TAXI OVER AND FILL TANKS FOR RETURN TO HANGAR (IN ORDER TO PREVENT CONDENSATION OVER WK).

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.