PA18 pilot loses directional control on takeoff from touch and go landing, strikes a taxiway sign, a...

Attributes
ACN	628296
Time
Date	200408
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : 48v.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-18/19 Super Cub
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Helicopter
Operating Under FAR Part	Part 91
Flight Phase	ground other : hover
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 30.5 flight time total : 2074.15 flight time type : 291.9
ASRS Report	628296
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 25.5 flight time total : 2513.7 flight time type : 218.2
ASRS Report	628472
Events
Anomaly	excursion : runway inflight encounter other other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : unable
Consequence	other other
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

The pilot flying the super cub was practicing touch and goes from the back seat position. Both pilot/CFI's were proficient and current in the aircraft. 7 touch and goes were accomplished without incident, even with a helicopter practicing hovering on the west X of the closed, cross runway. When loss of control happened after the best landing of the series, there were 2 helicopter's on each end of the closed, cross runway, practicing hovering on each of the X's. Control was lost on rollout as the cub approached the closed runway intersection with the aircraft exiting the runway on the right side, hitting a taxiway sign just after getting airborne, and coming to rest on the east side of the runway. It is assumed the turbulence of the 2 helicopter's affected directional control of the cub as it was rolling out after touchdown. Supplemental information from acn 628472: while making takeoffs and lndgs from the back seat of a piper L21 super cub, power was slowly applied for takeoff. The aircraft turned toward the right side of the runway. Full power and full left rudder were applied in an attempt to remain on the runway. As the aircraft lifted off the left main landing gear and horizontal stabilizer struck a runway sign. A landing was made on the parallel taxiway. Due to the damaged landing gear the plane ground looped to the left. Since I was flying from the rear seat I was unable to see the sign. The CFI in the front seat also was unable to correct the path of the aircraft. To avoid this type of incident be sure the aircraft is on the centerline and moving straight ahead during power applications.

Original NASA ASRS Text

Title: PA18 PLT LOSES DIRECTIONAL CTL ON TKOF FROM TOUCH AND GO LNDG, STRIKES A TXWY SIGN, AND LANDS ON A PARALLEL TXWY. PROX OF HELI'S HOVERING AT THE ENDS OF A XING RWY NOTED AS A POSSIBLE CONTRIBUTING FACTOR.

Narrative: THE PLT FLYING THE SUPER CUB WAS PRACTICING TOUCH AND GOES FROM THE BACK SEAT POS. BOTH PLT/CFI'S WERE PROFICIENT AND CURRENT IN THE ACFT. 7 TOUCH AND GOES WERE ACCOMPLISHED WITHOUT INCIDENT, EVEN WITH A HELI PRACTICING HOVERING ON THE WEST X OF THE CLOSED, CROSS RWY. WHEN LOSS OF CTL HAPPENED AFTER THE BEST LNDG OF THE SERIES, THERE WERE 2 HELI'S ON EACH END OF THE CLOSED, CROSS RWY, PRACTICING HOVERING ON EACH OF THE X'S. CTL WAS LOST ON ROLLOUT AS THE CUB APCHED THE CLOSED RWY INTXN WITH THE ACFT EXITING THE RWY ON THE R SIDE, HITTING A TXWY SIGN JUST AFTER GETTING AIRBORNE, AND COMING TO REST ON THE E SIDE OF THE RWY. IT IS ASSUMED THE TURB OF THE 2 HELI'S AFFECTED DIRECTIONAL CTL OF THE CUB AS IT WAS ROLLING OUT AFTER TOUCHDOWN. SUPPLEMENTAL INFO FROM ACN 628472: WHILE MAKING TKOFS AND LNDGS FROM THE BACK SEAT OF A PIPER L21 SUPER CUB, PWR WAS SLOWLY APPLIED FOR TKOF. THE ACFT TURNED TOWARD THE R SIDE OF THE RWY. FULL PWR AND FULL L RUDDER WERE APPLIED IN AN ATTEMPT TO REMAIN ON THE RWY. AS THE ACFT LIFTED OFF THE L MAIN LNDG GEAR AND HORIZ STABILIZER STRUCK A RWY SIGN. A LNDG WAS MADE ON THE PARALLEL TXWY. DUE TO THE DAMAGED LNDG GEAR THE PLANE GND LOOPED TO THE L. SINCE I WAS FLYING FROM THE REAR SEAT I WAS UNABLE TO SEE THE SIGN. THE CFI IN THE FRONT SEAT ALSO WAS UNABLE TO CORRECT THE PATH OF THE ACFT. TO AVOID THIS TYPE OF INCIDENT BE SURE THE ACFT IS ON THE CTRLINE AND MOVING STRAIGHT AHEAD DURING PWR APPLICATIONS.

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.

PA18 pilot loses directional control on takeoff from touch and go landing, strikes a taxiway sign, and lands on a parallel taxiway. Proximity of helicopter's hovering at the ends of a crossing runway noted as a possible contributing factor.