C-172 training flight taxis to their holding pt using the wrong ramp exit at fsd, sd.

Attributes
ACN	509160
Time
Date	200104
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : fsd.airport
State Reference	SD
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 oversight : pic
Qualification	pilot : commercial pilot : cfi pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 75 flight time total : 1800 flight time type : 400
ASRS Report	509160
Events
Anomaly	incursion : taxiway non adherence : clearance
Resolutory Action	none taken : detected after the fact none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Chart Or Publication Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

My student contacted ground control and was told 'taxi to runway 3, hold short of runway 33 at bravo.' the threshold to runway 33 and runway 3 are south of the FBO, so my student left the FBO and proceeded on alpha: this also seemed correct to me. We then made a stop to let traffic pass from behind us and ground then cleared us to 'taxi to runway 3 hold short of runway 33 at runway 27'. This clearance was in the direction we were heading and at that time my student and I both realized that we had not complied with our initial taxi instructions which would have required us to leave the ramp to the north even though we wanted to eventually go south. I guess we both expected to taxi via alpha to runway 27 to runway 3 and had that so firmly in our heads that we didn't realize we were cleared to taxi via a different route. The ground controller never mentioned the problem. I assume because the field was slow and we didn't cause any problems or cross any runways that we weren't supposed to. We should use a taxi diagram, even at our home field.

Original NASA ASRS Text

Title: C-172 TRAINING FLT TAXIS TO THEIR HOLDING PT USING THE WRONG RAMP EXIT AT FSD, SD.

Narrative: MY STUDENT CONTACTED GND CTL AND WAS TOLD 'TAXI TO RWY 3, HOLD SHORT OF RWY 33 AT BRAVO.' THE THRESHOLD TO RWY 33 AND RWY 3 ARE S OF THE FBO, SO MY STUDENT LEFT THE FBO AND PROCEEDED ON ALPHA: THIS ALSO SEEMED CORRECT TO ME. WE THEN MADE A STOP TO LET TFC PASS FROM BEHIND US AND GND THEN CLRED US TO 'TAXI TO RWY 3 HOLD SHORT OF RWY 33 AT RWY 27'. THIS CLRNC WAS IN THE DIRECTION WE WERE HDG AND AT THAT TIME MY STUDENT AND I BOTH REALIZED THAT WE HAD NOT COMPLIED WITH OUR INITIAL TAXI INSTRUCTIONS WHICH WOULD HAVE REQUIRED US TO LEAVE THE RAMP TO THE N EVEN THOUGH WE WANTED TO EVENTUALLY GO S. I GUESS WE BOTH EXPECTED TO TAXI VIA ALPHA TO RWY 27 TO RWY 3 AND HAD THAT SO FIRMLY IN OUR HEADS THAT WE DIDN'T REALIZE WE WERE CLRED TO TAXI VIA A DIFFERENT RTE. THE GND CTLR NEVER MENTIONED THE PROB. I ASSUME BECAUSE THE FIELD WAS SLOW AND WE DIDN'T CAUSE ANY PROBS OR CROSS ANY RWYS THAT WE WEREN'T SUPPOSED TO. WE SHOULD USE A TAXI DIAGRAM, EVEN AT OUR HOME FIELD.

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.