B727 had runway incursion on runway 12L at stl.

Attributes
ACN	465931
Time
Date	200003
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl.airport
State Reference	MO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : stl.tower
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 220 flight time total : 7000 flight time type : 500
ASRS Report	465931
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	incursion : runway non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	FAA Flight Crew Human Performance Airport ATC Facility ATC Human Performance
Primary Problem	ATC Human Performance
Situations
ATC Facility	procedure or policy : stl.tower

Narrative:

During taxi out at stl we were given instructions to taxi to runway 12L via taxiway D and taxiway C to cross runway 12R and hold short of runway 12L. As the nose of the aircraft crosses the hold short line of runway 12R about 6 ft, we were given new instructions to stop immediately. There was a B727 in position on runway 12R but had not been given takeoff instructions because there were aircraft crossing runway 12R down at taxiway right and taxiway south that had landed on runway 12L. There were several aircraft with similar clrncs that had changed several times. This led to some confusion on our part!

Original NASA ASRS Text

Title: B727 HAD RWY INCURSION ON RWY 12L AT STL.

Narrative: DURING TAXI OUT AT STL WE WERE GIVEN INSTRUCTIONS TO TAXI TO RWY 12L VIA TXWY D AND TXWY C TO CROSS RWY 12R AND HOLD SHORT OF RWY 12L. AS THE NOSE OF THE ACFT CROSSES THE HOLD SHORT LINE OF RWY 12R ABOUT 6 FT, WE WERE GIVEN NEW INSTRUCTIONS TO STOP IMMEDIATELY. THERE WAS A B727 IN POS ON RWY 12R BUT HAD NOT BEEN GIVEN TKOF INSTRUCTIONS BECAUSE THERE WERE ACFT XING RWY 12R DOWN AT TXWY R AND TXWY S THAT HAD LANDED ON RWY 12L. THERE WERE SEVERAL ACFT WITH SIMILAR CLRNCS THAT HAD CHANGED SEVERAL TIMES. THIS LED TO SOME CONFUSION ON OUR PART!

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.