Narrative:

Simultaneous approachs were being conducted into runway 26 and runways 25 in phx. We were coming in on a north arrival and were cleared for the visual approach to runway 26. A learjet from the south was cleared for one of the runways 25. We didn't hear their radio communications as they were talking to a different approach and tower frequency. We were established on the GS and localizer for runway 26 and were cleared to land on runway 26. We noticed on TCAS the lear approaching from above. They inadvertently lined up for runway 26 rather than runway 25 and came within about 300 ft directly above us. The captain was flying and responded to an RA and descended below the GS; following the vsi TCAS information. We asked tower where the lear was going and he responded that the lear wasn't where he should be. The lear was told to go around (unheard by us) and did so. The captain was able to get back on the GS and continue the approach; satisfying stabilized approach criteria. The landing was uneventful. The lear was from another country; so there could have been a language barrier problem. Without being able to hear their radio communications; it's hard to tell; but I'm surprised that the lear was able to get as close as it did before corrective action was taken. I hope ATC was trying to resolve the situation much earlier than it was resolved; but if it wasn't; then phx tower or approach should keep a better eye on parallel traffic.

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Original NASA ASRS Text

Title: A B737-300 ON A PHX RWY 26 VISUAL APCH RPTS AN NMAC WITH A LEARJET ON A RWY 25 VISUAL INCORRECTLY LINED UP ON THE WRONG RWY.

Narrative: SIMULTANEOUS APCHS WERE BEING CONDUCTED INTO RWY 26 AND RWYS 25 IN PHX. WE WERE COMING IN ON A N ARR AND WERE CLRED FOR THE VISUAL APCH TO RWY 26. A LEARJET FROM THE S WAS CLRED FOR ONE OF THE RWYS 25. WE DIDN'T HEAR THEIR RADIO COMS AS THEY WERE TALKING TO A DIFFERENT APCH AND TWR FREQ. WE WERE ESTABLISHED ON THE GS AND LOC FOR RWY 26 AND WERE CLRED TO LAND ON RWY 26. WE NOTICED ON TCAS THE LEAR APCHING FROM ABOVE. THEY INADVERTENTLY LINED UP FOR RWY 26 RATHER THAN RWY 25 AND CAME WITHIN ABOUT 300 FT DIRECTLY ABOVE US. THE CAPT WAS FLYING AND RESPONDED TO AN RA AND DSNDED BELOW THE GS; FOLLOWING THE VSI TCAS INFO. WE ASKED TWR WHERE THE LEAR WAS GOING AND HE RESPONDED THAT THE LEAR WASN'T WHERE HE SHOULD BE. THE LEAR WAS TOLD TO GO AROUND (UNHEARD BY US) AND DID SO. THE CAPT WAS ABLE TO GET BACK ON THE GS AND CONTINUE THE APCH; SATISFYING STABILIZED APCH CRITERIA. THE LNDG WAS UNEVENTFUL. THE LEAR WAS FROM ANOTHER COUNTRY; SO THERE COULD HAVE BEEN A LANGUAGE BARRIER PROB. WITHOUT BEING ABLE TO HEAR THEIR RADIO COMS; IT'S HARD TO TELL; BUT I'M SURPRISED THAT THE LEAR WAS ABLE TO GET AS CLOSE AS IT DID BEFORE CORRECTIVE ACTION WAS TAKEN. I HOPE ATC WAS TRYING TO RESOLVE THE SITUATION MUCH EARLIER THAN IT WAS RESOLVED; BUT IF IT WASN'T; THEN PHX TWR OR APCH SHOULD KEEP A BETTER EYE ON PARALLEL TFC.

Data retrieved from NASA's ASRS site as of January 2009 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.