SR20 instructor and student are required to abort takeoff due to a runway incursion.

Attributes
ACN	687094
Time
Date	200602
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : vny.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Weather Elements	Windshear
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : vny.tower
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 1800 flight time type : 200
ASRS Report	687097
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : ground less severe incursion : runway
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : issued advisory flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Taxiway a is under construction; leaving a taxi area of under 37 ft available between intxns right and Q. Ground control offers an intersection departure at taxiway Q right before the construction zone when departing runway 34. This reduces the runway by 2000 ft. The renaming of the intxns occurred recently and govt/commercial chart company haven't updated their airport diagrams yet; so there is constant confusion on the parts of the controllers and pilots as to location and taxiing instructions. Cleared to position and hold; we turned the lights on; checked the finals and position; giving up very little runway. Cleared for takeoff; the client adds full power. I saw a cherokee pulling out onto the runway ahead of us. I said 'whoa; abort; abort' as my hand touched the throttle and our TCAS announced 'traffic; traffic!' the client had already initiated idle power and braking; so I didn't interfere. There was a moment of silence on the frequency before tower realized what was going on and issued instructions to the cherokee to stop then us. We'd already stopped by the time the tower canceled our takeoff clearance.

Original NASA ASRS Text

Title: SR20 INSTRUCTOR AND STUDENT ARE REQUIRED TO ABORT TKOF DUE TO A RWY INCURSION.

Narrative: TXWY A IS UNDER CONSTRUCTION; LEAVING A TAXI AREA OF UNDER 37 FT AVAILABLE BTWN INTXNS R AND Q. GND CTL OFFERS AN INTXN DEP AT TXWY Q RIGHT BEFORE THE CONSTRUCTION ZONE WHEN DEPARTING RWY 34. THIS REDUCES THE RWY BY 2000 FT. THE RENAMING OF THE INTXNS OCCURRED RECENTLY AND GOVT/COMMERCIAL CHART COMPANY HAVEN'T UPDATED THEIR ARPT DIAGRAMS YET; SO THERE IS CONSTANT CONFUSION ON THE PARTS OF THE CTLRS AND PLTS AS TO LOCATION AND TAXIING INSTRUCTIONS. CLRED TO POS AND HOLD; WE TURNED THE LIGHTS ON; CHKED THE FINALS AND POS; GIVING UP VERY LITTLE RWY. CLRED FOR TKOF; THE CLIENT ADDS FULL PWR. I SAW A CHEROKEE PULLING OUT ONTO THE RWY AHEAD OF US. I SAID 'WHOA; ABORT; ABORT' AS MY HAND TOUCHED THE THROTTLE AND OUR TCAS ANNOUNCED 'TFC; TFC!' THE CLIENT HAD ALREADY INITIATED IDLE PWR AND BRAKING; SO I DIDN'T INTERFERE. THERE WAS A MOMENT OF SILENCE ON THE FREQ BEFORE TWR REALIZED WHAT WAS GOING ON AND ISSUED INSTRUCTIONS TO THE CHEROKEE TO STOP THEN US. WE'D ALREADY STOPPED BY THE TIME THE TWR CANCELED OUR TKOF CLRNC.

Data retrieved from NASA's ASRS site as of January 2009 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.