Taxiway excursion from the loss of aircraft control on a taxi operation when the instructor pilot is...

Attributes
ACN	509920
Time
Date	200101
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hya.airport
State Reference	MA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 500 flight time type : 32
ASRS Report	509920
Events
Anomaly	conflict : ground critical excursion : taxiway ground encounters other other anomaly
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was giving a lesson to a new student. I had taught him to taxi and we had practiced, but obviously not enough. We turned left to taxi to the run-up area, and the plane swung wide -- not sharp enough for the turn. I told him to apply left brake but he didn't react. I then pushed on the brake myself and told him to take his feet off, but he didn't react quick enough. I pulled the power and attempted to push the brake, but he had pressed down on the rudder so hard that I couldn't move the brake. As a result, we rolled off the taxiway onto the grass and broke a taxi light. After we brought the plane back, the student and I discussed the rudder and brake system thoroughly, as well as positive and timely transference of controls. He understands what went wrong and we will both be more careful not to let that happen again.

Original NASA ASRS Text

Title: TXWY EXCURSION FROM THE LOSS OF ACFT CTL ON A TAXI OP WHEN THE INSTRUCTOR PLT IS UNABLE TO REGAIN RUDDER CTL FROM THE STUDENT PLT AT HYA, MA.

Narrative: I WAS GIVING A LESSON TO A NEW STUDENT. I HAD TAUGHT HIM TO TAXI AND WE HAD PRACTICED, BUT OBVIOUSLY NOT ENOUGH. WE TURNED L TO TAXI TO THE RUN-UP AREA, AND THE PLANE SWUNG WIDE -- NOT SHARP ENOUGH FOR THE TURN. I TOLD HIM TO APPLY L BRAKE BUT HE DIDN'T REACT. I THEN PUSHED ON THE BRAKE MYSELF AND TOLD HIM TO TAKE HIS FEET OFF, BUT HE DIDN'T REACT QUICK ENOUGH. I PULLED THE PWR AND ATTEMPTED TO PUSH THE BRAKE, BUT HE HAD PRESSED DOWN ON THE RUDDER SO HARD THAT I COULDN'T MOVE THE BRAKE. AS A RESULT, WE ROLLED OFF THE TXWY ONTO THE GRASS AND BROKE A TAXI LIGHT. AFTER WE BROUGHT THE PLANE BACK, THE STUDENT AND I DISCUSSED THE RUDDER AND BRAKE SYS THOROUGHLY, AS WELL AS POSITIVE AND TIMELY TRANSFERENCE OF CTLS. HE UNDERSTANDS WHAT WENT WRONG AND WE WILL BOTH BE MORE CAREFUL NOT TO LET THAT HAPPEN AGAIN.

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.

Taxiway excursion from the loss of aircraft control on a taxi operation when the instructor pilot is unable to regain rudder control from the student pilot at hya, ma.