Narrative:

We were holding short of runway 23L while operating flight from mex in a B737-300. We were given the instruction by mex tower control to taxi into position for runway 23L. We looked to clear final approach and saw an aircraft at a distance. Following engine spool-up and initial aircraft movement, we took another look and saw the same aircraft aligned with runway 23L. We stopped but we had just crossed the hold short line. We asked the tower as to which runway was the aircraft in question landing. They replied runway 23L and said 'hold position' which we acknowledged and complied. The other aircraft, an A320, seemed to perform a normal approach and landing. We were given subsequent instructions to position and hold. Our takeoff and departure was uneventful.

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Original NASA ASRS Text

Title: A B737-300 FLC STARTS TO TAXI INTO POS AND HOLD WHILE AN ACFT WAS ON SHORT FINAL FOR SAME RWY AT MMMX. FO.

Narrative: WE WERE HOLDING SHORT OF RWY 23L WHILE OPERATING FLT FROM MEX IN A B737-300. WE WERE GIVEN THE INSTRUCTION BY MEX TWR CTL TO TAXI INTO POS FOR RWY 23L. WE LOOKED TO CLR FINAL APCH AND SAW AN ACFT AT A DISTANCE. FOLLOWING ENG SPOOL-UP AND INITIAL ACFT MOVEMENT, WE TOOK ANOTHER LOOK AND SAW THE SAME ACFT ALIGNED WITH RWY 23L. WE STOPPED BUT WE HAD JUST CROSSED THE HOLD SHORT LINE. WE ASKED THE TWR AS TO WHICH RWY WAS THE ACFT IN QUESTION LNDG. THEY REPLIED RWY 23L AND SAID 'HOLD POS' WHICH WE ACKNOWLEDGED AND COMPLIED. THE OTHER ACFT, AN A320, SEEMED TO PERFORM A NORMAL APCH AND LNDG. WE WERE GIVEN SUBSEQUENT INSTRUCTIONS TO POS AND HOLD. OUR TKOF AND DEP WAS UNEVENTFUL.

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.