Narrative:

Cleared to land on runway 23L, but another aircraft was on the runway. Callback conversation with reporter revealed the following information: the reporter was flying a B757-200 on an approach to runway 23L in mexico city when he saw another aircraft on the runway. After completing a go around the approach controller said that the other aircraft was cleared to land on runway 23R. The other aircraft was a B767-200 and the captain saw it about 2 mi out on final. He said that he started the go around at that time and passed over the approach end of the runway about 1000 ft AGL. He was unsure how close he came to the B767-200, but assumed that he was even higher when he passed over it since he had continued his climb. The controller did not explain further how the aircraft was allowed to land on the wrong runway without any warning to it or to the reporter. The WX was good, but a haze layer somewhat restr visibility.

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Original NASA ASRS Text

Title: UNAUTH LNDG UNAUTH RWY. ACR ON APCH EXECUTES A GAR WHEN ANOTHER ACR LANDS ON THE RWY.

Narrative: CLRED TO LAND ON RWY 23L, BUT ANOTHER ACFT WAS ON THE RWY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS FLYING A B757-200 ON AN APCH TO RWY 23L IN MEXICO CITY WHEN HE SAW ANOTHER ACFT ON THE RWY. AFTER COMPLETING A GAR THE APCH CTLR SAID THAT THE OTHER ACFT WAS CLRED TO LAND ON RWY 23R. THE OTHER ACFT WAS A B767-200 AND THE CAPT SAW IT ABOUT 2 MI OUT ON FINAL. HE SAID THAT HE STARTED THE GAR AT THAT TIME AND PASSED OVER THE APCH END OF THE RWY ABOUT 1000 FT AGL. HE WAS UNSURE HOW CLOSE HE CAME TO THE B767-200, BUT ASSUMED THAT HE WAS EVEN HIGHER WHEN HE PASSED OVER IT SINCE HE HAD CONTINUED HIS CLB. THE CTLR DID NOT EXPLAIN FURTHER HOW THE ACFT WAS ALLOWED TO LAND ON THE WRONG RWY WITHOUT ANY WARNING TO IT OR TO THE RPTR. THE WX WAS GOOD, BUT A HAZE LAYER SOMEWHAT RESTR VISIBILITY.

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.