An atx frtr took off from a taxiway.

Attributes
ACN	260467
Time
Date	199312
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Small Transport
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : cfi pilot : atp pilot : commercial
Experience	flight time total : 6600 flight time type : 700
ASRS Report	260467
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility procedure or policy : unspecified

Narrative:

Dfw airport, taxiing south on the inner taxiway for runway 18L/36R. I was cleared to taxiway 31, expect departure from this intersection. As I approached 29, the controller asked if I wished to depart from this point. My reply was asking for the length from this point. He replied 7200 ft. At this time I was arriving at 29 and was cleared for takeoff. After departing the traffic pattern and turned over to ZFW, I was asked to contact the dfw chief on duty, at my next point of landing. I was informed I had departed from a taxiway. I do not remember this action. The dfw chief informed me this same thing occurred a few weeks before. If I did this, I do not know why, and why I did not catch it. Contributing factors: long day on my part. Haste to depart, and finish the day. Controller clearing for departure from inner taxiway.

Original NASA ASRS Text

Title: AN ATX FRTR TOOK OFF FROM A TXWY.

Narrative: DFW ARPT, TAXIING S ON THE INNER TXWY FOR RWY 18L/36R. I WAS CLRED TO TXWY 31, EXPECT DEP FROM THIS INTXN. AS I APCHED 29, THE CTLR ASKED IF I WISHED TO DEPART FROM THIS POINT. MY REPLY WAS ASKING FOR THE LENGTH FROM THIS POINT. HE REPLIED 7200 FT. AT THIS TIME I WAS ARRIVING AT 29 AND WAS CLRED FOR TKOF. AFTER DEPARTING THE TFC PATTERN AND TURNED OVER TO ZFW, I WAS ASKED TO CONTACT THE DFW CHIEF ON DUTY, AT MY NEXT POINT OF LNDG. I WAS INFORMED I HAD DEPARTED FROM A TXWY. I DO NOT REMEMBER THIS ACTION. THE DFW CHIEF INFORMED ME THIS SAME THING OCCURRED A FEW WKS BEFORE. IF I DID THIS, I DO NOT KNOW WHY, AND WHY I DID NOT CATCH IT. CONTRIBUTING FACTORS: LONG DAY ON MY PART. HASTE TO DEPART, AND FINISH THE DAY. CTLR CLRING FOR DEP FROM INNER TXWY.

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.