B737 had a close encounter with a sabreliner on takeoff roll.

Attributes
ACN	469400
Time
Date	200004
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : phl.tower
Make Model Name	Rockwell North American Civil Twin Jet
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 200 flight time total : 2800 flight time type : 600
ASRS Report	469400
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground critical ground encounters other incursion : runway non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Miss Distance	horizontal : 150 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were taxiing west on taxiway K in phl behind an MD80. He was instructed to cross runway 9L at taxiway T and to get in line behind aircraft on taxiway P awaiting takeoff clearance. Ground control asked us to report holding short of taxiway T on taxiway K. Which I reported immediately since we were already there. Ground then instructed us to cross runway 9L on taxiway T and expedite to get in line behind aircraft on taxiway P. As we turned onto taxiway T, I turned on the strobes and cleared the runway to my right (west). When I did this, I noticed an aircraft in position with lights on. I then noticed motion on that aircraft moving towards us. I instructed the captain to stop us as I noticed the aircraft moving. He did this immediately and we came to a stop about 30-40 ft past the hold short lines. We advised ground of the problem after the sabreliner passed in front of us and they reclred us across the runway. Ground told us after reviewing the tapes that the sabreliner had taken off without clearance. He mistook another aircraft's takeoff clearance on runway 8. Solutions to this may include 1 controller for each runway, rather than us being on ground and takeoff clrncs being given by tower, even though it's the same concrete, and always look both ways before crossing the active.

Original NASA ASRS Text

Title: B737 HAD A CLOSE ENCOUNTER WITH A SABRELINER ON TKOF ROLL.

Narrative: WE WERE TAXIING W ON TXWY K IN PHL BEHIND AN MD80. HE WAS INSTRUCTED TO CROSS RWY 9L AT TXWY T AND TO GET IN LINE BEHIND ACFT ON TXWY P AWAITING TKOF CLRNC. GND CTL ASKED US TO RPT HOLDING SHORT OF TXWY T ON TXWY K. WHICH I RPTED IMMEDIATELY SINCE WE WERE ALREADY THERE. GND THEN INSTRUCTED US TO CROSS RWY 9L ON TXWY T AND EXPEDITE TO GET IN LINE BEHIND ACFT ON TXWY P. AS WE TURNED ONTO TXWY T, I TURNED ON THE STROBES AND CLRED THE RWY TO MY R (W). WHEN I DID THIS, I NOTICED AN ACFT IN POS WITH LIGHTS ON. I THEN NOTICED MOTION ON THAT ACFT MOVING TOWARDS US. I INSTRUCTED THE CAPT TO STOP US AS I NOTICED THE ACFT MOVING. HE DID THIS IMMEDIATELY AND WE CAME TO A STOP ABOUT 30-40 FT PAST THE HOLD SHORT LINES. WE ADVISED GND OF THE PROB AFTER THE SABRELINER PASSED IN FRONT OF US AND THEY RECLRED US ACROSS THE RWY. GND TOLD US AFTER REVIEWING THE TAPES THAT THE SABRELINER HAD TAKEN OFF WITHOUT CLRNC. HE MISTOOK ANOTHER ACFT'S TKOF CLRNC ON RWY 8. SOLUTIONS TO THIS MAY INCLUDE 1 CTLR FOR EACH RWY, RATHER THAN US BEING ON GND AND TKOF CLRNCS BEING GIVEN BY TWR, EVEN THOUGH IT'S THE SAME CONCRETE, AND ALWAYS LOOK BOTH WAYS BEFORE XING THE ACTIVE.

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.