Narrative:

The transition to chicago airspace was punctuated by speed changes, holding instructions, a canceled hold and vectors. An intercept heading and altitude were issued for ILS 14R at ord. The WX was reported something like 300 ft overcast. 2200 RVR (approach) with decreasing values at midpoint and rollout. Winds were 110 degrees at approximately 10 KTS. We briefed a low approach and the captain made a normal landing. Visibility was very poor on rollout. After landing the tower requested we exit on T6 or T7. We elected T7 and very cautiously turned off there. Ground then instructed us to turn right on taxiway tango. At this point, blowing snow reduced visibility further and we moved forward with extreme care until spotting taxiway light stanchions at our 2 O'clock position. We proceeded down what we believed was taxiway T, virtually 1 light at a time, with great attention to maintaining our track on a paved surface. After a short distance, the captain sensed we might be in the wrong place. He turned left immediately, informing ground that he suspected we might be on a runway. Position was then re-established and remainder of taxi to ramp area coordinated with ground. Partially to wholly obscured signage and near white-out conditions made taxi difficult. Captain's wiper blade became inoperative. Supplemental information from acn 264507: using taxiway lights for guidance, visibility extremely poor. Passing widebody transport on parallel taxiway bravo with 15 KT wind from the east created virtual white-out.

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Original NASA ASRS Text

Title: MLG TAXIING IN BLOWING SNOW ENTERS RWY IN ERROR.

Narrative: THE TRANSITION TO CHICAGO AIRSPACE WAS PUNCTUATED BY SPD CHANGES, HOLDING INSTRUCTIONS, A CANCELED HOLD AND VECTORS. AN INTERCEPT HDG AND ALT WERE ISSUED FOR ILS 14R AT ORD. THE WX WAS RPTED SOMETHING LIKE 300 FT OVCST. 2200 RVR (APCH) WITH DECREASING VALUES AT MIDPOINT AND ROLLOUT. WINDS WERE 110 DEGS AT APPROX 10 KTS. WE BRIEFED A LOW APCH AND THE CAPT MADE A NORMAL LNDG. VISIBILITY WAS VERY POOR ON ROLLOUT. AFTER LNDG THE TWR REQUESTED WE EXIT ON T6 OR T7. WE ELECTED T7 AND VERY CAUTIOUSLY TURNED OFF THERE. GND THEN INSTRUCTED US TO TURN R ON TXWY TANGO. AT THIS POINT, BLOWING SNOW REDUCED VISIBILITY FURTHER AND WE MOVED FORWARD WITH EXTREME CARE UNTIL SPOTTING TXWY LIGHT STANCHIONS AT OUR 2 O'CLOCK POS. WE PROCEEDED DOWN WHAT WE BELIEVED WAS TXWY T, VIRTUALLY 1 LIGHT AT A TIME, WITH GREAT ATTN TO MAINTAINING OUR TRACK ON A PAVED SURFACE. AFTER A SHORT DISTANCE, THE CAPT SENSED WE MIGHT BE IN THE WRONG PLACE. HE TURNED L IMMEDIATELY, INFORMING GND THAT HE SUSPECTED WE MIGHT BE ON A RWY. POS WAS THEN RE-ESTABLISHED AND REMAINDER OF TAXI TO RAMP AREA COORDINATED WITH GND. PARTIALLY TO WHOLLY OBSCURED SIGNAGE AND NEAR WHITE-OUT CONDITIONS MADE TAXI DIFFICULT. CAPT'S WIPER BLADE BECAME INOP. SUPPLEMENTAL INFO FROM ACN 264507: USING TXWY LIGHTS FOR GUIDANCE, VISIBILITY EXTREMELY POOR. PASSING WDB ON PARALLEL TXWY BRAVO WITH 15 KT WIND FROM THE E CREATED VIRTUAL WHITE-OUT.

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.