C401 pilot had runway incursion.

Attributes
ACN	444240
Time
Date	199907
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sat.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Cessna 401
Operating Under FAR Part	Part 135
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 1975 flight time type : 150
ASRS Report	444240
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued advisory none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After unloading cargo I needed to relocate the airplane to the FBO ramp, and called ground control for permission to taxi. Controller issued instructions which I acknowledged. My understanding was that I was to cross runway 3 and then cross runway 12L and hold short of runway 12R. After crossing runway 12L the controller stated 'that was runway 12L you just crossed, do not cross any other runway without permission.' I don't know if the controller misspoke his clearance to me, or if I just heard one thing and visualized another. In my mind's eye, I was always cleared to cross the first parallel runway, and hold short of the second. It had been a long day, nearing 13 1/2 hours of duty time when this happened. Fatigue may have been a factor.

Original NASA ASRS Text

Title: C401 PLT HAD RWY INCURSION.

Narrative: AFTER UNLOADING CARGO I NEEDED TO RELOCATE THE AIRPLANE TO THE FBO RAMP, AND CALLED GND CTL FOR PERMISSION TO TAXI. CTLR ISSUED INSTRUCTIONS WHICH I ACKNOWLEDGED. MY UNDERSTANDING WAS THAT I WAS TO CROSS RWY 3 AND THEN CROSS RWY 12L AND HOLD SHORT OF RWY 12R. AFTER XING RWY 12L THE CTLR STATED 'THAT WAS RWY 12L YOU JUST CROSSED, DO NOT CROSS ANY OTHER RWY WITHOUT PERMISSION.' I DON'T KNOW IF THE CTLR MISSPOKE HIS CLRNC TO ME, OR IF I JUST HEARD ONE THING AND VISUALIZED ANOTHER. IN MY MIND'S EYE, I WAS ALWAYS CLRED TO CROSS THE FIRST PARALLEL RWY, AND HOLD SHORT OF THE SECOND. IT HAD BEEN A LONG DAY, NEARING 13 1/2 HRS OF DUTY TIME WHEN THIS HAPPENED. FATIGUE MAY HAVE BEEN A FACTOR.

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.