ATCT local controller cleared a commuter for takeoff runway 1L and then cleared the medium large transport to taxi into position and hold on the same runway. The commuter was starting takeoff from the entry at taxiway M and the medium large transport was at taxiway H where the runway begins. The medium large transport crossed the hold line and saw the commuter to his right as he crossed the hold line and tower told it to abort. Aircraft stopped 100 ft apart.

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Attributes
ACN	369497
Time
Date	199705
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 2000
ASRS Report	369497
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : ground critical incursion : runway non adherence : published procedure non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment
Consequence	Other
Miss Distance	horizontal : 100 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

My aircraft was holding short of intersection H. The small twin engine aircraft was given cleared for takeoff from the end of runway 1L. I was then given taxi into position and hold. As I crossed the hold short line at intersection H, I saw the aircraft coming from my right. I immediately stepped on the brakes bringing my aircraft to a quick stop. The tower warned the commuter aircraft to abort the takeoff causing him to stop in front of us. This was a very busy morning the tower was landing runway 28L&right and departing runway 01L&right. A lot of aircraft were in the approach path, and on the ground awaiting takeoff clearance. The tower was very busy and in a hurry.

Original NASA ASRS Text

Title: ATCT LCL CTLR CLRED A COMMUTER FOR TKOF RWY 1L AND THEN CLRED THE MLG TO TAXI INTO POS AND HOLD ON THE SAME RWY. THE COMMUTER WAS STARTING TKOF FROM THE ENTRY AT TXWY M AND THE MLG WAS AT TXWY H WHERE THE RWY BEGINS. THE MLG CROSSED THE HOLD LINE AND SAW THE COMMUTER TO HIS R AS HE CROSSED THE HOLD LINE AND TWR TOLD IT TO ABORT. ACFT STOPPED 100 FT APART.

Narrative: MY ACFT WAS HOLDING SHORT OF INTXN H. THE SMALL TWIN ENG ACFT WAS GIVEN CLRED FOR TKOF FROM THE END OF RWY 1L. I WAS THEN GIVEN TAXI INTO POS AND HOLD. AS I CROSSED THE HOLD SHORT LINE AT INTXN H, I SAW THE ACFT COMING FROM MY R. I IMMEDIATELY STEPPED ON THE BRAKES BRINGING MY ACFT TO A QUICK STOP. THE TWR WARNED THE COMMUTER ACFT TO ABORT THE TKOF CAUSING HIM TO STOP IN FRONT OF US. THIS WAS A VERY BUSY MORNING THE TWR WAS LNDG RWY 28L&R AND DEPARTING RWY 01L&R. A LOT OF ACFT WERE IN THE APCH PATH, AND ON THE GND AWAITING TKOF CLRNC. THE TWR WAS VERY BUSY AND IN A HURRY.

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.