B757 crew assigned runway 20 at sgf taxi on runway without being aware of the incursion.

Attributes
ACN	586225
Time
Date	200306
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sgf.airport
State Reference	MO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 4000
ASRS Report	586225
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 3600
ASRS Report	586224
Events
Anomaly	incursion : runway non adherence : far non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action flight crew : became reoriented
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to taxi to runway 20. Did a 180 degree from parking position onto taxiway B, not realizing that the next point wasn't a parallel taxiway, but the runway. Realizing immediately that we had inadvertently pulled onto the runway, we notified tower and taxied clear at the approach end of runway 20. There were no flashing lights or noticeable signs. Outbound taxi was briefed.

Original NASA ASRS Text

Title: B757 CREW ASSIGNED RWY 20 AT SGF TAXI ON RWY WITHOUT BEING AWARE OF THE INCURSION.

Narrative: CLRED TO TAXI TO RWY 20. DID A 180 DEG FROM PARKING POS ONTO TXWY B, NOT REALIZING THAT THE NEXT POINT WASN'T A PARALLEL TXWY, BUT THE RWY. REALIZING IMMEDIATELY THAT WE HAD INADVERTENTLY PULLED ONTO THE RWY, WE NOTIFIED TWR AND TAXIED CLR AT THE APCH END OF RWY 20. THERE WERE NO FLASHING LIGHTS OR NOTICEABLE SIGNS. OUTBOUND TAXI WAS BRIEFED.

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.