After completing deicing, an A320 at dtw entered a taxiway before contacting ground control.

Attributes
ACN	566706
Time
Date	200211
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Weather Elements	Snow
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A320
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 : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 19000 flight time type : 875
ASRS Report	566706
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	incursion : taxiway non adherence : published procedure non adherence : far
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Told to taxi to ice pad by ramp control. Entered, instructed by ground control at opposite end of pad. Trouble getting iceman frequency at pad. After deice, given signal by ground personnel to pull forward with waive off. As taxiing forward, confusion on correct ground control frequency. Pulled up to entry way of parallel taxiway, only to discover we were on an active taxiway. Charts for ice pad were not clear, lines on ground not visible due to sheen on ramp and light reflection. We were also extremely tired and that certainly was a factor.

Original NASA ASRS Text

Title: AFTER COMPLETING DEICING, AN A320 AT DTW ENTERED A TXWY BEFORE CONTACTING GND CTL.

Narrative: TOLD TO TAXI TO ICE PAD BY RAMP CTL. ENTERED, INSTRUCTED BY GND CTL AT OPPOSITE END OF PAD. TROUBLE GETTING ICEMAN FREQ AT PAD. AFTER DEICE, GIVEN SIGNAL BY GND PERSONNEL TO PULL FORWARD WITH WAIVE OFF. AS TAXIING FORWARD, CONFUSION ON CORRECT GND CTL FREQ. PULLED UP TO ENTRY WAY OF PARALLEL TXWY, ONLY TO DISCOVER WE WERE ON AN ACTIVE TXWY. CHARTS FOR ICE PAD WERE NOT CLR, LINES ON GND NOT VISIBLE DUE TO SHEEN ON RAMP AND LIGHT REFLECTION. WE WERE ALSO EXTREMELY TIRED AND THAT CERTAINLY WAS A FACTOR.

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.