AC680 pilot rejects the takeoff after another aircraft enters the runway at pfyu.

Attributes
ACN	588505
Time
Date	200307
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : fyu.airport
State Reference	AK
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Commander 680 All Series
Operating Under FAR Part	Part 135
Flight Phase	ground : takeoff roll
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	PA-31 Navajo Chieftan/Mojave/Navajo T1020
Flight Phase	ground : taxi
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 3500 flight time type : 220
ASRS Report	588505
Person 2
Affiliation	company : air taxi
Function	flight crew : single pilot
Events
Anomaly	conflict : ground critical incursion : runway non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was back taxiing on runway 21 for departure, making radio calls on CTAF 122.50. As I reached the end of runway, a navajo called for taxi out to runway for departure. I immediately called back saying I was about to take off runway 21. No response from navajo. I turned my airplane around into position for takeoff, made another radio call stating I'm taking off runway 21. I had still no response from the navajo, but did not see it taxiing out. Beginning end of runway 21 to ramp access taxiway is 5000 ft apart, so I decided to have enough distance for gate operation in case of incursion. I started my takeoff roll and approximately 500-1000 ft down the runway, the navajo taxies onto runway and then made radio call saying back taxi on runway. I aborted takeoff, stopping approximately 2000 ft from the navajo. When I called on CTAF that I aborted takeoff, navajo finally responded saying they'll clear the runway.

Original NASA ASRS Text

Title: AC680 PLT REJECTS THE TKOF AFTER ANOTHER ACFT ENTERS THE RWY AT PFYU.

Narrative: I WAS BACK TAXIING ON RWY 21 FOR DEP, MAKING RADIO CALLS ON CTAF 122.50. AS I REACHED THE END OF RWY, A NAVAJO CALLED FOR TAXI OUT TO RWY FOR DEP. I IMMEDIATELY CALLED BACK SAYING I WAS ABOUT TO TAKE OFF RWY 21. NO RESPONSE FROM NAVAJO. I TURNED MY AIRPLANE AROUND INTO POS FOR TKOF, MADE ANOTHER RADIO CALL STATING I'M TAKING OFF RWY 21. I HAD STILL NO RESPONSE FROM THE NAVAJO, BUT DID NOT SEE IT TAXIING OUT. BEGINNING END OF RWY 21 TO RAMP ACCESS TXWY IS 5000 FT APART, SO I DECIDED TO HAVE ENOUGH DISTANCE FOR GATE OP IN CASE OF INCURSION. I STARTED MY TKOF ROLL AND APPROX 500-1000 FT DOWN THE RWY, THE NAVAJO TAXIES ONTO RWY AND THEN MADE RADIO CALL SAYING BACK TAXI ON RWY. I ABORTED TKOF, STOPPING APPROX 2000 FT FROM THE NAVAJO. WHEN I CALLED ON CTAF THAT I ABORTED TKOF, NAVAJO FINALLY RESPONDED SAYING THEY'LL CLR THE RWY.

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.