E140 crew entered runway 12R at stl as they began taxi from spot H.

Attributes
ACN	576121
Time
Date	200303
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : stl.airport
State Reference	MO
Altitude	agl single value : 0
Environment
Flight Conditions	Marginal
Weather Elements	Fog Rain
Light	Night
Aircraft 1
Controlling Facilities	tower : stl.tower
Make Model Name	EMB ERJ 140 ER&LR
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	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : go around
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 5000 flight time type : 1500
ASRS Report	576121
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Experience	flight time last 90 days : 75 flight time total : 1400 flight time type : 75
ASRS Report	576101
Events
Anomaly	conflict : ground less severe incursion : runway inflight encounter : weather non adherence : company policies non adherence : clearance non adherence : far non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : executed go around flight crew : took evasive action
Consequence	faa : assigned or threatened penalties faa : investigated
Miss Distance	horizontal : 8000 vertical : 100
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On mar/wed/03, XA30 pm, I was taxiing an EMB140 for takeoff at st louis lambert airfield. I was holding on spot H when ground told me to taxi to runway 12L via taxiway a and hold short of runway 12R at taxiway east. It was night and raining. This area near intersection 'H' and 'a' is poorly marked and has poor lighting. As I pulled off spot H, I called for our taxi checklist. Taxiway a and the ramp are essentially one large tarmac in this area, making it difficult to recognize taxiway a. I taxied straight on taxiway H past taxiway a and as I was crossing the hold short line, I noticed an MD80 on final and realized that I was taxiing onto the runway and not taxiway a. I immediately initiated a 180 degree turn and exited the runway at spot H where I entered it. At this time the MD80 initiated a go around. Supplemental information from acn 576101: I was instructed to start the taxi checklist. While reading the taxi checklist I glanced up to see we were entering the active runway 12R at taxiway H. At that second, my captain turned the airplane off the runway at the same place we entered. As we were turning off the runway the landing traffic was going around. There was at least 8000 ft of separation. After discussing the incident with my captain, I have decided that the timing for the taxi checklist and my captain's comfortability and complacency at lambert were the reason we ended up in the situation we did.

Original NASA ASRS Text

Title: E140 CREW ENTERED RWY 12R AT STL AS THEY BEGAN TAXI FROM SPOT H.

Narrative: ON MAR/WED/03, XA30 PM, I WAS TAXIING AN EMB140 FOR TKOF AT ST LOUIS LAMBERT AIRFIELD. I WAS HOLDING ON SPOT H WHEN GND TOLD ME TO TAXI TO RWY 12L VIA TXWY A AND HOLD SHORT OF RWY 12R AT TXWY E. IT WAS NIGHT AND RAINING. THIS AREA NEAR INTXN 'H' AND 'A' IS POORLY MARKED AND HAS POOR LIGHTING. AS I PULLED OFF SPOT H, I CALLED FOR OUR TAXI CHKLIST. TXWY A AND THE RAMP ARE ESSENTIALLY ONE LARGE TARMAC IN THIS AREA, MAKING IT DIFFICULT TO RECOGNIZE TXWY A. I TAXIED STRAIGHT ON TXWY H PAST TXWY A AND AS I WAS XING THE HOLD SHORT LINE, I NOTICED AN MD80 ON FINAL AND REALIZED THAT I WAS TAXIING ONTO THE RWY AND NOT TXWY A. I IMMEDIATELY INITIATED A 180 DEG TURN AND EXITED THE RWY AT SPOT H WHERE I ENTERED IT. AT THIS TIME THE MD80 INITIATED A GAR. SUPPLEMENTAL INFO FROM ACN 576101: I WAS INSTRUCTED TO START THE TAXI CHKLIST. WHILE READING THE TAXI CHKLIST I GLANCED UP TO SEE WE WERE ENTERING THE ACTIVE RWY 12R AT TXWY H. AT THAT SECOND, MY CAPT TURNED THE AIRPLANE OFF THE RWY AT THE SAME PLACE WE ENTERED. AS WE WERE TURNING OFF THE RWY THE LNDG TFC WAS GOING AROUND. THERE WAS AT LEAST 8000 FT OF SEPARATION. AFTER DISCUSSING THE INCIDENT WITH MY CAPT, I HAVE DECIDED THAT THE TIMING FOR THE TAXI CHKLIST AND MY CAPT'S COMFORTABILITY AND COMPLACENCY AT LAMBERT WERE THE REASON WE ENDED UP IN THE SIT WE DID.

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.