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A departing B757-200 flight crew take evasive action to avoid a crossing B190 descending on arrival into den resulting from a TCASII alert.
| Attributes | |
| ACN | 617473 |
| Time | |
| Date | 200405 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | msl bound lower : 11500 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : d01.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : rockies |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d01.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 617473 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 120 flight time total : 600 flight time type : 1850 |
| ASRS Report | 617684 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : took precautionary avoidance action flight crew : took evasive action |
| Miss Distance | horizontal : 6000 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
After takeoff and while on the assigned 170 degree heading, tower handed our flight over to departure control. Departure control gave us a 230 degree heading, climb to FL230. Established on the 230 degree heading and climbing through around 11500 ft, received TCASII TA. At 12500 ft, received TCASII RA 'descend.' we complied with the TCASII RA. TCASII was leveled at 12000 ft and TCASII RA removed. With another aircraft ahead of us reporting same TCASII situation, we were finally able to advise ATC of our TCASII RA and current altitude. We saw opposite direction BE190 at 13000 ft. Flight continued without further incident. Supplemental information from acn 617684: after climbing through 12000 ft we picked up traffic on TCASII descending through 15000 ft and were given a speed restr of 250 KTS and a heading of 350 degrees. At this point we had an RA on the TCASII with the conflicting traffic descending on the arrs ito den. The problem with this close call was the vector into the arrival corridor and the climb to FL230. The problem was even more pronounced with ATC direction to slow to 250 KTS which increases initial rate of climb resulting in little effect on separation.
Original NASA ASRS Text
Title: A DEPARTING B757-200 FLT CREW TAKE EVASIVE ACTION TO AVOID A XING B190 DSNDING ON ARR INTO DEN RESULTING FROM A TCASII ALERT.
Narrative: AFTER TKOF AND WHILE ON THE ASSIGNED 170 DEG HDG, TWR HANDED OUR FLT OVER TO DEP CTL. DEP CTL GAVE US A 230 DEG HDG, CLB TO FL230. ESTABLISHED ON THE 230 DEG HDG AND CLBING THROUGH AROUND 11500 FT, RECEIVED TCASII TA. AT 12500 FT, RECEIVED TCASII RA 'DSND.' WE COMPLIED WITH THE TCASII RA. TCASII WAS LEVELED AT 12000 FT AND TCASII RA REMOVED. WITH ANOTHER ACFT AHEAD OF US RPTING SAME TCASII SIT, WE WERE FINALLY ABLE TO ADVISE ATC OF OUR TCASII RA AND CURRENT ALT. WE SAW OPPOSITE DIRECTION BE190 AT 13000 FT. FLT CONTINUED WITHOUT FURTHER INCIDENT. SUPPLEMENTAL INFO FROM ACN 617684: AFTER CLBING THROUGH 12000 FT WE PICKED UP TFC ON TCASII DSNDING THROUGH 15000 FT AND WERE GIVEN A SPD RESTR OF 250 KTS AND A HDG OF 350 DEGS. AT THIS POINT WE HAD AN RA ON THE TCASII WITH THE CONFLICTING TFC DSNDING ON THE ARRS ITO DEN. THE PROB WITH THIS CLOSE CALL WAS THE VECTOR INTO THE ARR CORRIDOR AND THE CLB TO FL230. THE PROB WAS EVEN MORE PRONOUNCED WITH ATC DIRECTION TO SLOW TO 250 KTS WHICH INCREASES INITIAL RATE OF CLB RESULTING IN LITTLE EFFECT ON SEPARATION.
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.