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An A320 flight crew on approach to den encountered windshear and executed a go around. While still in windshear recovery mode; ATC issued a turn to them to clear another aircraft.
| Attributes | |
| ACN | 788817 |
| Time | |
| Date | 200805 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | msl single value : 7000 |
| Environment | |
| Weather Elements | Turbulence Windshear |
| Aircraft 1 | |
| Controlling Facilities | tower : den.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 150 flight time total : 20000 flight time type : 6000 |
| ASRS Report | 788817 |
| Events | |
| Anomaly | inflight encounter : turbulence inflight encounter other other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : executed go around flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | ATC Human Performance Weather |
| Primary Problem | Weather |
Narrative:
Turbulence and gust approaching limits for windshear avoidance prevailed during final approach. Over the lights a sudden loss of speed and resultant pitch up to maintain flight path exceeded windshear limits and a resultant 'windshear' go around was initiated. Tower was utilizing an intersecting runway arrangement with us landing on runway 16L and another aircraft was either on takeoff or go around from runway 25 (or possibly in the turn from a runway 17 departure). While recovering from the low energy state of the windshear avoidance ATC issued a 90 degree turn to us (the compromised aircraft). I would suggest that ATC issue any initial change to the uncompromised aircraft until we advise them that we are clear of the event -- treat us much like the transgressors in prm approachs; assume that we are unable and clear the other aircraft.
Original NASA ASRS Text
Title: AN A320 FLT CREW ON APCH TO DEN ENCOUNTERED WINDSHEAR AND EXECUTED A GO AROUND. WHILE STILL IN WINDSHEAR RECOVERY MODE; ATC ISSUED A TURN TO THEM TO CLEAR ANOTHER AIRCRAFT.
Narrative: TURB AND GUST APCHING LIMITS FOR WINDSHEAR AVOIDANCE PREVAILED DURING FINAL APCH. OVER THE LIGHTS A SUDDEN LOSS OF SPD AND RESULTANT PITCH UP TO MAINTAIN FLT PATH EXCEEDED WINDSHEAR LIMITS AND A RESULTANT 'WINDSHEAR' GAR WAS INITIATED. TWR WAS UTILIZING AN INTERSECTING RWY ARRANGEMENT WITH US LNDG ON RWY 16L AND ANOTHER ACFT WAS EITHER ON TKOF OR GAR FROM RWY 25 (OR POSSIBLY IN THE TURN FROM A RWY 17 DEP). WHILE RECOVERING FROM THE LOW ENERGY STATE OF THE WINDSHEAR AVOIDANCE ATC ISSUED A 90 DEG TURN TO US (THE COMPROMISED ACFT). I WOULD SUGGEST THAT ATC ISSUE ANY INITIAL CHANGE TO THE UNCOMPROMISED ACFT UNTIL WE ADVISE THEM THAT WE ARE CLR OF THE EVENT -- TREAT US MUCH LIKE THE TRANSGRESSORS IN PRM APCHS; ASSUME THAT WE ARE UNABLE AND CLR THE OTHER ACFT.
Data retrieved from NASA's ASRS site as of May 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.