A BE35 pilot, taxiing for takeoff, taxied past the hold short line.

Attributes
ACN	532625
Time
Date	200112
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : apa.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 28 flight time total : 812 flight time type : 140
ASRS Report	532625
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : runway non adherence : clearance non adherence : far non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was ready to taxi bonanza XXXX and ground control gave me permission to taxi out to runway 35R and hold short. I repeated the instructions and began to taxi. As I turned onto the taxiway, the button on the tip of my throttle popped off because the screw holding it came loose. About that time ground called me and asked me to hold short of taxiway A8 if needed to let oncoming traffic clear the taxiway. I repeated her instructions and asked permission to get off the taxiway to repair the knob. Ground said that was ok. I exited the taxiway at taxiway A8. I parked near the end of runway 10 in the run-up area. After I repaired the knob, which took about 2 mins, I called ground and reported that I was ready. Ground said that I could proceed to runway 35R or if I wanted runway 10 I could depart to the southeast. This was my intended direction of flight so I opted for runway 10. The ground controller told me to call when ready for departure and to remain on this frequency. I moved left and towards runway 10 about 100 ft. I parked and began my final run-up procedure. About 1 min later, the tower operator called 'xax you have crossed the hold short line and are impeding operation on runway 28/10.' it took me about 5 seconds to realize what he meant and as I began to answer he asked, 'xax how do you read?' I said 'this is xax, I was turning and proceeding behind the hold short line, which I had crossed by about 3/4 the length of the aircraft.' I added that 'I thought she (ground) had cleared me to the runway and to call when ready to depart.' the tower speaking again on ground frequency said 'no, she cleared you to the hold line.' I said 'I apologize,' and that 'I am now back behind the hold line.' the tower, on ground frequency, said 'report ready to depart.' I completed my run-up and called about 60 seconds later 'xax ready for departure.' they answered 'xax monitor tower and wait for instruction.' there were 2 aircraft on final, 1 about 1/2 mi out, the other about 2 mi out for runway 28. When these aircraft had cleared the runway, I was cleared for departure on runway 10. I believe I was confused by the combination of the throttle button coming apart and then the unexpected change of runways.

Original NASA ASRS Text

Title: A BE35 PLT, TAXIING FOR TKOF, TAXIED PAST THE HOLD SHORT LINE.

Narrative: I WAS READY TO TAXI BONANZA XXXX AND GND CTL GAVE ME PERMISSION TO TAXI OUT TO RWY 35R AND HOLD SHORT. I REPEATED THE INSTRUCTIONS AND BEGAN TO TAXI. AS I TURNED ONTO THE TXWY, THE BUTTON ON THE TIP OF MY THROTTLE POPPED OFF BECAUSE THE SCREW HOLDING IT CAME LOOSE. ABOUT THAT TIME GND CALLED ME AND ASKED ME TO HOLD SHORT OF TXWY A8 IF NEEDED TO LET ONCOMING TFC CLR THE TXWY. I REPEATED HER INSTRUCTIONS AND ASKED PERMISSION TO GET OFF THE TXWY TO REPAIR THE KNOB. GND SAID THAT WAS OK. I EXITED THE TXWY AT TXWY A8. I PARKED NEAR THE END OF RWY 10 IN THE RUN-UP AREA. AFTER I REPAIRED THE KNOB, WHICH TOOK ABOUT 2 MINS, I CALLED GND AND RPTED THAT I WAS READY. GND SAID THAT I COULD PROCEED TO RWY 35R OR IF I WANTED RWY 10 I COULD DEPART TO THE SE. THIS WAS MY INTENDED DIRECTION OF FLT SO I OPTED FOR RWY 10. THE GND CTLR TOLD ME TO CALL WHEN READY FOR DEP AND TO REMAIN ON THIS FREQ. I MOVED L AND TOWARDS RWY 10 ABOUT 100 FT. I PARKED AND BEGAN MY FINAL RUN-UP PROC. ABOUT 1 MIN LATER, THE TWR OPERATOR CALLED 'XAX YOU HAVE CROSSED THE HOLD SHORT LINE AND ARE IMPEDING OP ON RWY 28/10.' IT TOOK ME ABOUT 5 SECONDS TO REALIZE WHAT HE MEANT AND AS I BEGAN TO ANSWER HE ASKED, 'XAX HOW DO YOU READ?' I SAID 'THIS IS XAX, I WAS TURNING AND PROCEEDING BEHIND THE HOLD SHORT LINE, WHICH I HAD CROSSED BY ABOUT 3/4 THE LENGTH OF THE ACFT.' I ADDED THAT 'I THOUGHT SHE (GND) HAD CLRED ME TO THE RWY AND TO CALL WHEN READY TO DEPART.' THE TWR SPEAKING AGAIN ON GND FREQ SAID 'NO, SHE CLRED YOU TO THE HOLD LINE.' I SAID 'I APOLOGIZE,' AND THAT 'I AM NOW BACK BEHIND THE HOLD LINE.' THE TWR, ON GND FREQ, SAID 'RPT READY TO DEPART.' I COMPLETED MY RUN-UP AND CALLED ABOUT 60 SECONDS LATER 'XAX READY FOR DEP.' THEY ANSWERED 'XAX MONITOR TWR AND WAIT FOR INSTRUCTION.' THERE WERE 2 ACFT ON FINAL, 1 ABOUT 1/2 MI OUT, THE OTHER ABOUT 2 MI OUT FOR RWY 28. WHEN THESE ACFT HAD CLRED THE RWY, I WAS CLRED FOR DEP ON RWY 10. I BELIEVE I WAS CONFUSED BY THE COMBINATION OF THE THROTTLE BUTTON COMING APART AND THEN THE UNEXPECTED CHANGE OF RWYS.

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.