Large transport taxies off taxiway during night taxi with wet area.

Attributes
ACN	270423
Time
Date	199404
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 7500 flight time type : 1000
ASRS Report	270423
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 20000 flight time type : 4600
ASRS Report	270817
Events
Anomaly	non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At night with light rain and poor visibility of taxi lines, the captain turned from delta taxiway attempting to join bravo. We became unsure of our position between alpha and bravo. It appears we were on paved concrete slightly encroaching the pad between A18 and A19. No aircraft damage. No taxi light damage. We secured a tug and pushed back a few ft to rejoin the taxiway. As soon as our position became unclear the captain stopped the aircraft and called for a tug. I was looking at the airport taxi diagram as the right turn was made. I cleared to the right then looked back to the chart. New taxiway markings and poor visibility contributed.

Original NASA ASRS Text

Title: LGT TAXIES OFF TXWY DURING NIGHT TAXI WITH WET AREA.

Narrative: AT NIGHT WITH LIGHT RAIN AND POOR VISIBILITY OF TAXI LINES, THE CAPT TURNED FROM DELTA TXWY ATTEMPTING TO JOIN BRAVO. WE BECAME UNSURE OF OUR POS BTWN ALPHA AND BRAVO. IT APPEARS WE WERE ON PAVED CONCRETE SLIGHTLY ENCROACHING THE PAD BTWN A18 AND A19. NO ACFT DAMAGE. NO TAXI LIGHT DAMAGE. WE SECURED A TUG AND PUSHED BACK A FEW FT TO REJOIN THE TXWY. AS SOON AS OUR POS BECAME UNCLEAR THE CAPT STOPPED THE ACFT AND CALLED FOR A TUG. I WAS LOOKING AT THE ARPT TAXI DIAGRAM AS THE R TURN WAS MADE. I CLEARED TO THE R THEN LOOKED BACK TO THE CHART. NEW TXWY MARKINGS AND POOR VISIBILITY CONTRIBUTED.

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.