Omf-100 pilot inadvertently taxies onto an active runway at grr.

Attributes
ACN	571777
Time
Date	200301
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : grr.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : slc.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 100 flight time total : 7000 flight time type : 25
ASRS Report	571777
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : runway non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : became reoriented
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I contacted ground for a VFR departure. I started taxiing east on taxiway D. I thought the controller asked me to turn on the next crossing, which was taxiway M, and proceeded south for runway 35. I did not have an airport diagram with me. I thought my turn was taking me across runway 8R to another taxiway. When I got on the runway, and did not see another exit, I started to taxi off as I advised the ground controller. He, instead, cleared me to depart on runway 8R, which I did with no incident. The controller said all was ok. I should have asked questions before I taxied onto the runway.

Original NASA ASRS Text

Title: OMF-100 PLT INADVERTENTLY TAXIES ONTO AN ACTIVE RWY AT GRR.

Narrative: I CONTACTED GND FOR A VFR DEP. I STARTED TAXIING E ON TXWY D. I THOUGHT THE CTLR ASKED ME TO TURN ON THE NEXT XING, WHICH WAS TXWY M, AND PROCEEDED S FOR RWY 35. I DID NOT HAVE AN ARPT DIAGRAM WITH ME. I THOUGHT MY TURN WAS TAKING ME ACROSS RWY 8R TO ANOTHER TXWY. WHEN I GOT ON THE RWY, AND DID NOT SEE ANOTHER EXIT, I STARTED TO TAXI OFF AS I ADVISED THE GND CTLR. HE, INSTEAD, CLRED ME TO DEPART ON RWY 8R, WHICH I DID WITH NO INCIDENT. THE CTLR SAID ALL WAS OK. I SHOULD HAVE ASKED QUESTIONS BEFORE I TAXIED ONTO THE RWY.

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.