A departure air carrier crossed over the top of an small aircraft taxiing onto the runway.

Attributes
ACN	120641
Time
Date	198908
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sat
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 100
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : sat
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : takeoff
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	ground other : taxi
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	120641
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground critical non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

Air carrier X was cleared for takeoff on runway 12R. Shortly thereafter, small aircraft Y called for takeoff. I observed air carrier X on the runway starting takeoff. I cleared small aircraft Y into position and hold. A few seconds later air carrier X asked if there was someone on the runway. I looked up and down the runway, saw nothing and then physically moved to the right to see around the window post, and there was small aircraft Y on the runway at mid-field. He was at taxiway a looking for an intersection departure. I thought the aircraft was at the end of the runway. At this time air carrier said he was going over small aircraft Y and passed approximately 50' above the small transport. There were no injuries nor damage.

Original NASA ASRS Text

Title: A DEP ACR CROSSED OVER THE TOP OF AN SMA TAXIING ONTO THE RWY.

Narrative: ACR X WAS CLRED FOR TKOF ON RWY 12R. SHORTLY THEREAFTER, SMA Y CALLED FOR TKOF. I OBSERVED ACR X ON THE RWY STARTING TKOF. I CLRED SMA Y INTO POS AND HOLD. A FEW SECS LATER ACR X ASKED IF THERE WAS SOMEONE ON THE RWY. I LOOKED UP AND DOWN THE RWY, SAW NOTHING AND THEN PHYSICALLY MOVED TO THE RIGHT TO SEE AROUND THE WINDOW POST, AND THERE WAS SMA Y ON THE RWY AT MID-FIELD. HE WAS AT TXWY A LOOKING FOR AN INTXN DEP. I THOUGHT THE ACFT WAS AT THE END OF THE RWY. AT THIS TIME ACR SAID HE WAS GOING OVER SMA Y AND PASSED APPROX 50' ABOVE THE SMT. THERE WERE NO INJURIES NOR DAMAGE.

Data retrieved from NASA's ASRS site as of August 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.