Pilot of small aircraft unaware of completed taxiway--taxied down runway.

Attributes
ACN	111230
Time
Date	198905
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hrl
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 1400
ASRS Report	111230
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	incursion : runway other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

Was cleared to taxi from FBO flying service on east ramp to runway 17L to hold short of runway 26. Airport diagram does not correctly show txwys. Ground controller intended for me to taxi north on taxiway parallel to 17L, turn right on diagonal taxiway and hold short of approach end of runway 26. According to airport diagram, there is no way to get to 26 west/O taxiing on to 17L. I assumed ground control wanted me to back-taxi down 17L and hold short of runway 26. Ground control stated that I was not cleared to back-taxi down 17L. Commercial chart does not show these 2 txwys to be connected. Taxiway is not idented on diagram (by letter). Actually, the 2 are connected. FBO's have recently moved to east side of airport and most local pilots are not familiar with this taxi procedure. More detailed taxi instructions should be given. Also, a report diagram needs to be revised and corrected.

Original NASA ASRS Text

Title: PLT OF SMA UNAWARE OF COMPLETED TXWY--TAXIED DOWN RWY.

Narrative: WAS CLRED TO TAXI FROM FBO FLYING SVC ON E RAMP TO RWY 17L TO HOLD SHORT OF RWY 26. ARPT DIAGRAM DOES NOT CORRECTLY SHOW TXWYS. GND CTLR INTENDED FOR ME TO TAXI N ON TXWY PARALLEL TO 17L, TURN R ON DIAGONAL TXWY AND HOLD SHORT OF APCH END OF RWY 26. ACCORDING TO ARPT DIAGRAM, THERE IS NO WAY TO GET TO 26 W/O TAXIING ON TO 17L. I ASSUMED GND CTL WANTED ME TO BACK-TAXI DOWN 17L AND HOLD SHORT OF RWY 26. GND CTL STATED THAT I WAS NOT CLRED TO BACK-TAXI DOWN 17L. COMMERCIAL CHART DOES NOT SHOW THESE 2 TXWYS TO BE CONNECTED. TXWY IS NOT IDENTED ON DIAGRAM (BY LETTER). ACTUALLY, THE 2 ARE CONNECTED. FBO'S HAVE RECENTLY MOVED TO E SIDE OF ARPT AND MOST LCL PLTS ARE NOT FAMILIAR WITH THIS TAXI PROC. MORE DETAILED TAXI INSTRUCTIONS SHOULD BE GIVEN. ALSO, A RPT DIAGRAM NEEDS TO BE REVISED AND CORRECTED.

Data retrieved from NASA's ASRS site as of August 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.