A 'trin' pilot misinterped a taxi clearance and taxied onto an active runway at ilg.

Attributes
ACN	528729
Time
Date	200110
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ilg.airport
State Reference	DE
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Trinidad TB-20
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 5 flight time total : 377 flight time type : 273
ASRS Report	528729
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was cleared to cross runway 9/27 and the approach end of runway 14/32 on taxiway F. (Note: the F' section of taxiway F is relatively new and it does not appear on the commercial chart airport diagram. In addition, due to the slope, it is difficult to see F' from the hold line on taxiway F, south of runway 9/27.) all previous taxi clrncs to get from taxiway F (south of runway 9/27) to my destination have included a very short taxi or runway 9/27 to the approach end of runway 14/32. I assumed, incorrectly, that this is what the controller intended. The ground controller paused, so I acknowledged my understanding of the taxi clearance. Unfortunately, the ground controller had not finished his transmission. Consequently, 1) I did not hear the balance of his transmission, which may have included information about the extension of taxiway F, and 2) the ground controller did not hear my transmission acknowledging my incorrect understanding of the clearance. The ground controller observed my error while on runway 9/27 and had me turn left onto runway 14/32. This runway incursion could have been avoided if the airport had distributed updated airport diagrams. Note: I learned, after the event, that updated airport diagrams were distributed by some to at least 1 of the flight schools on the field. Unfortunately, they were not distributed the hangar tenants.

Original NASA ASRS Text

Title: A 'TRIN' PLT MISINTERPED A TAXI CLRNC AND TAXIED ONTO AN ACTIVE RWY AT ILG.

Narrative: I WAS CLRED TO CROSS RWY 9/27 AND THE APCH END OF RWY 14/32 ON TXWY F. (NOTE: THE F' SECTION OF TXWY F IS RELATIVELY NEW AND IT DOES NOT APPEAR ON THE COMMERCIAL CHART ARPT DIAGRAM. IN ADDITION, DUE TO THE SLOPE, IT IS DIFFICULT TO SEE F' FROM THE HOLD LINE ON TXWY F, S OF RWY 9/27.) ALL PREVIOUS TAXI CLRNCS TO GET FROM TXWY F (S OF RWY 9/27) TO MY DEST HAVE INCLUDED A VERY SHORT TAXI OR RWY 9/27 TO THE APCH END OF RWY 14/32. I ASSUMED, INCORRECTLY, THAT THIS IS WHAT THE CTLR INTENDED. THE GND CTLR PAUSED, SO I ACKNOWLEDGED MY UNDERSTANDING OF THE TAXI CLRNC. UNFORTUNATELY, THE GND CTLR HAD NOT FINISHED HIS XMISSION. CONSEQUENTLY, 1) I DID NOT HEAR THE BALANCE OF HIS XMISSION, WHICH MAY HAVE INCLUDED INFO ABOUT THE EXTENSION OF TXWY F, AND 2) THE GND CTLR DID NOT HEAR MY XMISSION ACKNOWLEDGING MY INCORRECT UNDERSTANDING OF THE CLRNC. THE GND CTLR OBSERVED MY ERROR WHILE ON RWY 9/27 AND HAD ME TURN L ONTO RWY 14/32. THIS RWY INCURSION COULD HAVE BEEN AVOIDED IF THE ARPT HAD DISTRIBUTED UPDATED ARPT DIAGRAMS. NOTE: I LEARNED, AFTER THE EVENT, THAT UPDATED ARPT DIAGRAMS WERE DISTRIBUTED BY SOME TO AT LEAST 1 OF THE FLT SCHOOLS ON THE FIELD. UNFORTUNATELY, THEY WERE NOT DISTRIBUTED THE HANGAR TENANTS.

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.