Pilot overshot hold short line for intended runway.

Attributes
ACN	280910
Time
Date	199408
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : spg
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 140
Operating Under FAR Part	Part 91
Flight Phase	ground other : taxi
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 3300 flight time type : 1200
ASRS Report	280910
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Airport
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

On the short inbound flight from pie to spg, we heard a commercial radio station jamming tower frequency 127.4. I contacted spg ground control to notify them of my arrival and the radio interference. I heard ground control reprimanding another pilot for runway incursion. I didn't hear the whole conversation but got the gist of it. Ground sent me back to tower frequency. Interference was gone and landing was made on runway 24. About 20 mins later when taxiing for departure, it was my turn. I was cleared to taxi to runway 24. When I got to the area I've diagrammed, I saw 2 yellow signs showing a left turn to runway 24 and runway 18. I don't remember red signs. I crossed the yellow hold short lines in the diagram. They were parallel to runway 18. I didn't think they were for runway 24. At this point I asked ground 'what do we do here, a left then a right?' at that point he told me 'hold short, you've crossed the line.' I expected runway 24 hold short lines to be ahead of me and that they would be parallel to runway 24. I suggest better signage for the taxiway in the area shown.

Original NASA ASRS Text

Title: PLT OVERSHOT HOLD SHORT LINE FOR INTENDED RWY.

Narrative: ON THE SHORT INBOUND FLT FROM PIE TO SPG, WE HEARD A COMMERCIAL RADIO STATION JAMMING TWR FREQ 127.4. I CONTACTED SPG GND CTL TO NOTIFY THEM OF MY ARR AND THE RADIO INTERFERENCE. I HEARD GND CTL REPRIMANDING ANOTHER PLT FOR RWY INCURSION. I DIDN'T HEAR THE WHOLE CONVERSATION BUT GOT THE GIST OF IT. GND SENT ME BACK TO TWR FREQ. INTERFERENCE WAS GONE AND LNDG WAS MADE ON RWY 24. ABOUT 20 MINS LATER WHEN TAXIING FOR DEP, IT WAS MY TURN. I WAS CLRED TO TAXI TO RWY 24. WHEN I GOT TO THE AREA I'VE DIAGRAMMED, I SAW 2 YELLOW SIGNS SHOWING A L TURN TO RWY 24 AND RWY 18. I DON'T REMEMBER RED SIGNS. I CROSSED THE YELLOW HOLD SHORT LINES IN THE DIAGRAM. THEY WERE PARALLEL TO RWY 18. I DIDN'T THINK THEY WERE FOR RWY 24. AT THIS POINT I ASKED GND 'WHAT DO WE DO HERE, A L THEN A R?' AT THAT POINT HE TOLD ME 'HOLD SHORT, YOU'VE CROSSED THE LINE.' I EXPECTED RWY 24 HOLD SHORT LINES TO BE AHEAD OF ME AND THAT THEY WOULD BE PARALLEL TO RWY 24. I SUGGEST BETTER SIGNAGE FOR THE TXWY IN THE AREA SHOWN.

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.