C172 training flight veers off the taxiway during an attempted 45 degree turn onto taxiway a at myf,...

Attributes
ACN	580113
Time
Date	200304
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : myf.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 140 flight time total : 690 flight time type : 675
ASRS Report	580013
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	excursion : taxiway non adherence : clearance other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Preflight and start-up were completed as normal. As taxi was started, I tested the left and right rudder pedals, then the brakes. The student then did the same. Once reaching the intersection of taxiway I and taxiway G, the student received a taxi clearance to runway 28R via taxiway H and taxiway a. We proceeded to taxi and when the student made the r-hand turn from taxiway G and taxiway H, I realized our taxi speed was high. I told the student to reduce power and slow down. The student did as instructed and we continued east on taxiway H. Upon reaching the intersection of taxiway H and taxiway a, the student applied left rudder and the aircraft continued straight ahead. I reacted by pulling the remaining power and applying heavy braking. The aircraft was unable to be stopped on the taxiway and did not come to a complete stop until in the dirt at the east end of the taxiway. I feel that the incident could have been avoided had I, the instructor, had the student reduce power to idle before the turn, and also slowed the taxi speed. The aircraft may not have reacted to the control input as quickly as expected, but after testing the controls once back on the taxiway, I was unable to find any fault due to aircraft system malfunction. This incident occurred at myf, san diego, ca.

Original NASA ASRS Text

Title: C172 TRAINING FLT VEERS OFF THE TXWY DURING AN ATTEMPTED 45 DEG TURN ONTO TXWY A AT MYF, CA.

Narrative: PREFLT AND START-UP WERE COMPLETED AS NORMAL. AS TAXI WAS STARTED, I TESTED THE L AND R RUDDER PEDALS, THEN THE BRAKES. THE STUDENT THEN DID THE SAME. ONCE REACHING THE INTXN OF TXWY I AND TXWY G, THE STUDENT RECEIVED A TAXI CLRNC TO RWY 28R VIA TXWY H AND TXWY A. WE PROCEEDED TO TAXI AND WHEN THE STUDENT MADE THE R-HAND TURN FROM TXWY G AND TXWY H, I REALIZED OUR TAXI SPD WAS HIGH. I TOLD THE STUDENT TO REDUCE PWR AND SLOW DOWN. THE STUDENT DID AS INSTRUCTED AND WE CONTINUED E ON TXWY H. UPON REACHING THE INTXN OF TXWY H AND TXWY A, THE STUDENT APPLIED L RUDDER AND THE ACFT CONTINUED STRAIGHT AHEAD. I REACTED BY PULLING THE REMAINING PWR AND APPLYING HVY BRAKING. THE ACFT WAS UNABLE TO BE STOPPED ON THE TXWY AND DID NOT COME TO A COMPLETE STOP UNTIL IN THE DIRT AT THE E END OF THE TXWY. I FEEL THAT THE INCIDENT COULD HAVE BEEN AVOIDED HAD I, THE INSTRUCTOR, HAD THE STUDENT REDUCE PWR TO IDLE BEFORE THE TURN, AND ALSO SLOWED THE TAXI SPD. THE ACFT MAY NOT HAVE REACTED TO THE CTL INPUT AS QUICKLY AS EXPECTED, BUT AFTER TESTING THE CTLS ONCE BACK ON THE TXWY, I WAS UNABLE TO FIND ANY FAULT DUE TO ACFT SYS MALFUNCTION. THIS INCIDENT OCCURRED AT MYF, SAN DIEGO, CA.

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.

C172 training flight veers off the taxiway during an attempted 45 degree turn onto taxiway a at myf, ca.