Narrative:

Landed flight xx on runway 5R. Parked on ramp spot, then towed to gate after passenger offload. 1 hour later, we departed as flight xy, pushed back onto ramp south of the terminal facing south. ATIS information indicated runway 5R in use. Called ground control for taxi , cleared intersection B to runway 23L. I requested the winds, reply was 200 degrees at 8 KTS. We considered ourselves to be on taxiway C and agreed on the route after noticing a yellow taxiway sign with black lettering indicating intersection B ahead. Captain taxied straight ahead and to the left down what we believed to be bravo. Meanwhile, I was distraction calling clearance delivery for an amended clearance to depart runway 23L. The captain then noticed we were on runway 23R heading east. I immediately notified ground control who issued 180 degree turn on runway 23R to B7 then B to hold short runway 23R. Luckily, runway 23R was notamed closed. Upon exiting runway 23R at B7, we noticed that there was no runway identify except a badly soiled and poorly painted hold short markings on the taxiway. Also, the yellow taxiway B intersection marker on the edge of runway 23R/5L. I believe that the relocation of the airplane combined with the nonstandard ICAO airport markings, coupled with my distrs calling for clearance about runway change, led to this runway incursion. Supplemental information from acn 517734: I thought that we were on taxiway C, so I turned right to taxi to taxiway B since there was signage showing taxiway B to our right and no runway sign to indicate runway 23R. I think my confusion started when we parked at spot xx which is next to taxiway C. But, while we were there, the aircraft was moved to gate yy by mex city ground crews.

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Original NASA ASRS Text

Title: AN MD80 CREW MISUNDERSTOOD A TAXI CLRNC AT MMMX, TURNED THE WRONG WAY AND TAXIED ONTO A RWY NOT CLRED TO BE ON.

Narrative: LANDED FLT XX ON RWY 5R. PARKED ON RAMP SPOT, THEN TOWED TO GATE AFTER PAX OFFLOAD. 1 HR LATER, WE DEPARTED AS FLT XY, PUSHED BACK ONTO RAMP S OF THE TERMINAL FACING S. ATIS INFO INDICATED RWY 5R IN USE. CALLED GND CTL FOR TAXI , CLRED INTXN B TO RWY 23L. I REQUESTED THE WINDS, REPLY WAS 200 DEGS AT 8 KTS. WE CONSIDERED OURSELVES TO BE ON TXWY C AND AGREED ON THE RTE AFTER NOTICING A YELLOW TXWY SIGN WITH BLACK LETTERING INDICATING INTXN B AHEAD. CAPT TAXIED STRAIGHT AHEAD AND TO THE L DOWN WHAT WE BELIEVED TO BE BRAVO. MEANWHILE, I WAS DISTR CALLING CLRNC DELIVERY FOR AN AMENDED CLRNC TO DEPART RWY 23L. THE CAPT THEN NOTICED WE WERE ON RWY 23R HDG E. I IMMEDIATELY NOTIFIED GND CTL WHO ISSUED 180 DEG TURN ON RWY 23R TO B7 THEN B TO HOLD SHORT RWY 23R. LUCKILY, RWY 23R WAS NOTAMED CLOSED. UPON EXITING RWY 23R AT B7, WE NOTICED THAT THERE WAS NO RWY IDENT EXCEPT A BADLY SOILED AND POORLY PAINTED HOLD SHORT MARKINGS ON THE TXWY. ALSO, THE YELLOW TXWY B INTXN MARKER ON THE EDGE OF RWY 23R/5L. I BELIEVE THAT THE RELOCATION OF THE AIRPLANE COMBINED WITH THE NONSTANDARD ICAO ARPT MARKINGS, COUPLED WITH MY DISTRS CALLING FOR CLRNC ABOUT RWY CHANGE, LED TO THIS RWY INCURSION. SUPPLEMENTAL INFO FROM ACN 517734: I THOUGHT THAT WE WERE ON TXWY C, SO I TURNED R TO TAXI TO TXWY B SINCE THERE WAS SIGNAGE SHOWING TXWY B TO OUR R AND NO RWY SIGN TO INDICATE RWY 23R. I THINK MY CONFUSION STARTED WHEN WE PARKED AT SPOT XX WHICH IS NEXT TO TXWY C. BUT, WHILE WE WERE THERE, THE ACFT WAS MOVED TO GATE YY BY MEX CITY GND CREWS.

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.