Narrative:

Flight from alamosa to denver with 3 passenger onboard. The approach controller told us to fly heading 080 degrees, 170 KTS and to look for B737 traffic at 11 O'clock position. We acknowledged the traffic in sight. Approach then tells to turn 030 degree heading, descend to 8000 ft and slow to 160 KTS and to intercept runway 35L localizer. Once established on localizer, approach cleared us for a visual approach runway 35L behind B737, 160 KTS to dymon and there contact tower. At this time, we noticed the B737 had drastically overshot runway 35L, so much so, it appeared they were lining up for runway 34L. The B737 started turning back to the right to reintercept runway 35L. We were well spaced behind this B737 on the localizer and GS. At about 2-3 mi outside of dymon, captain noticed a target on TCASII which was set on 5 mi range. At that time, the target was at 3 O'clock position, 300 ft high, and 2.5 mi. First officer was looking out his right side for traffic and quickly noticed a B757 at 4 O'clock position heading straight for us, same altitude. At this point, the B757 appeared no more than 1/2 mi away from us. First officer told captain 'turn left now!' captain initiated left turn and quickly xferred controls to first officer, since he was able to see the exact position of the B757. Captain then said to 'turn as much as you need to avoid him.' first officer banked more than 45 degrees and started a descent to avoid this B757. At this time, we noticed the B757 aggressively pitch up and start a steep right bank. Once clear of the B757, we noticed we were full scale deflection to the left off course and below GS. The B757 was a few hundred ft above us and a few hundred ft to the right. It appeared as they were still correcting back to runway 35R. Their position at that time of correcting appeared to be right over the runway 35L approach course. Captain notified approach that we had to do evasive maneuvers not to get hit by the B757 that overshot runway 35R. The controller told us to deviate as needed to avoid the B757, also mentioned 'I don't know what those guys are doing over there, but when able, proceed back on course and contact tower,' we landed without incident. Once flight was complete, we called approach control to understand what just happened. The controller told us that they were aware and that tower had harsh words with that flight. He also told us that not only the B737 in front of us on approach overshot their landing runway, but the B757 that almost collided with us and the plane after them, also drastically overshot their assigned runway. After this phone call, we called our dispatcher, and chief pilot who informed us they would investigate more into this incident.

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Original NASA ASRS Text

Title: BE1900 FLT CREW PERFORMS AN EVASIVE MANEUVER TO AVOID A B757 DURING FINAL APCH TO DEN, RWY 35L.

Narrative: FLT FROM ALAMOSA TO DENVER WITH 3 PAX ONBOARD. THE APCH CTLR TOLD US TO FLY HEADING 080 DEGS, 170 KTS AND TO LOOK FOR B737 TFC AT 11 O'CLOCK POS. WE ACKNOWLEDGED THE TFC IN SIGHT. APCH THEN TELLS TO TURN 030 DEG HDG, DSND TO 8000 FT AND SLOW TO 160 KTS AND TO INTERCEPT RWY 35L LOC. ONCE ESTABLISHED ON LOC, APCH CLRED US FOR A VISUAL APCH RWY 35L BEHIND B737, 160 KTS TO DYMON AND THERE CONTACT TWR. AT THIS TIME, WE NOTICED THE B737 HAD DRASTICALLY OVERSHOT RWY 35L, SO MUCH SO, IT APPEARED THEY WERE LINING UP FOR RWY 34L. THE B737 STARTED TURNING BACK TO THE R TO REINTERCEPT RWY 35L. WE WERE WELL SPACED BEHIND THIS B737 ON THE LOC AND GS. AT ABOUT 2-3 MI OUTSIDE OF DYMON, CAPT NOTICED A TARGET ON TCASII WHICH WAS SET ON 5 MI RANGE. AT THAT TIME, THE TARGET WAS AT 3 O'CLOCK POS, 300 FT HIGH, AND 2.5 MI. FO WAS LOOKING OUT HIS R SIDE FOR TFC AND QUICKLY NOTICED A B757 AT 4 O'CLOCK POS HEADING STRAIGHT FOR US, SAME ALT. AT THIS POINT, THE B757 APPEARED NO MORE THAN 1/2 MI AWAY FROM US. FO TOLD CAPT 'TURN L NOW!' CAPT INITIATED L TURN AND QUICKLY XFERRED CTLS TO FO, SINCE HE WAS ABLE TO SEE THE EXACT POS OF THE B757. CAPT THEN SAID TO 'TURN AS MUCH AS YOU NEED TO AVOID HIM.' FO BANKED MORE THAN 45 DEGS AND STARTED A DSCNT TO AVOID THIS B757. AT THIS TIME, WE NOTICED THE B757 AGGRESSIVELY PITCH UP AND START A STEEP R BANK. ONCE CLR OF THE B757, WE NOTICED WE WERE FULL SCALE DEFLECTION TO THE L OFF COURSE AND BELOW GS. THE B757 WAS A FEW HUNDRED FT ABOVE US AND A FEW HUNDRED FT TO THE R. IT APPEARED AS THEY WERE STILL CORRECTING BACK TO RWY 35R. THEIR POS AT THAT TIME OF CORRECTING APPEARED TO BE RIGHT OVER THE RWY 35L APCH COURSE. CAPT NOTIFIED APCH THAT WE HAD TO DO EVASIVE MANEUVERS NOT TO GET HIT BY THE B757 THAT OVERSHOT RWY 35R. THE CTLR TOLD US TO DEVIATE AS NEEDED TO AVOID THE B757, ALSO MENTIONED 'I DON'T KNOW WHAT THOSE GUYS ARE DOING OVER THERE, BUT WHEN ABLE, PROCEED BACK ON COURSE AND CONTACT TWR,' WE LANDED WITHOUT INCIDENT. ONCE FLT WAS COMPLETE, WE CALLED APCH CTL TO UNDERSTAND WHAT JUST HAPPENED. THE CTLR TOLD US THAT THEY WERE AWARE AND THAT TWR HAD HARSH WORDS WITH THAT FLT. HE ALSO TOLD US THAT NOT ONLY THE B737 IN FRONT OF US ON APCH OVERSHOT THEIR LNDG RWY, BUT THE B757 THAT ALMOST COLLIDED WITH US AND THE PLANE AFTER THEM, ALSO DRASTICALLY OVERSHOT THEIR ASSIGNED RWY. AFTER THIS PHONE CALL, WE CALLED OUR DISPATCHER, AND CHIEF PLT WHO INFORMED US THEY WOULD INVESTIGATE MORE INTO THIS INCIDENT.

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.