|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : den|
|Altitude||agl bound lower : 700|
agl bound upper : 700
|Controlling Facilities||tower : den|
|Operator||common carrier : air carrier|
|Make Model Name||Medium Large Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||descent : approach|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : instrument|
pilot : commercial
pilot : cfi
pilot : flight engineer
|Experience||flight time last 90 days : 200|
flight time total : 5500
flight time type : 1500
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Anomaly||inflight encounter : weather|
|Independent Detector||aircraft equipment other aircraft equipment : unspecified|
other flight crewa
|Resolutory Action||flight crew : exited adverse environment|
|Air Traffic Incident||other|
We were heavy and the ATIS was indicating a slight tailwind and windshear. The captain and I discussed the approach and we decided if anything to stay a little high and keep our speed 15 to 20 KTS above reference. I was flying and configured early, but it was not enough as we were a little higher over altur (final approach fix) than I would have liked. I used additional flaps for a short time and as we approached G/south ( 1 DOT high) I went back to landing flaps and came in with the power. We could see a localized cloud over the 26 runways with virga. At some point on our flight path below 1000' AGL the tower announced that it was raining at the field and then there were indications of a 50 KT airspeed loss on final and a microburst alert. Another aircraft said they were going missed approach and we got the 'woop woop, pull up' recorded warning indicating a 1500 FPM rate of descent. I pulled up the nose slightly and increased power above that normally required the profile. The 'woop woop' ceased but the airspeed began to decrease. The captain said, 'fire wall them, let's get out of here.' I did and the aircraft responded immediately with no further loss of altitude or airspeed.
Original NASA ASRS Text
Title: ACR MLG MADE GO AORUND DUE LOW LEVEL WIND SHEAR. TWR ANNOUNCED THEY HAD A MICROBURST ALERT IN EFFECT WITH REPORTED 50 KNOT LOSS OF AIRSPEED ON FINAL.
Narrative: WE WERE HEAVY AND THE ATIS WAS INDICATING A SLIGHT TAILWIND AND WINDSHEAR. THE CAPT AND I DISCUSSED THE APCH AND WE DECIDED IF ANYTHING TO STAY A LITTLE HIGH AND KEEP OUR SPD 15 TO 20 KTS ABOVE REF. I WAS FLYING AND CONFIGURED EARLY, BUT IT WAS NOT ENOUGH AS WE WERE A LITTLE HIGHER OVER ALTUR (FINAL APCH FIX) THAN I WOULD HAVE LIKED. I USED ADDITIONAL FLAPS FOR A SHORT TIME AND AS WE APCHED G/S ( 1 DOT HIGH) I WENT BACK TO LNDG FLAPS AND CAME IN WITH THE PWR. WE COULD SEE A LOCALIZED CLOUD OVER THE 26 RWYS WITH VIRGA. AT SOME POINT ON OUR FLT PATH BELOW 1000' AGL THE TWR ANNOUNCED THAT IT WAS RAINING AT THE FIELD AND THEN THERE WERE INDICATIONS OF A 50 KT AIRSPD LOSS ON FINAL AND A MICROBURST ALERT. ANOTHER ACFT SAID THEY WERE GOING MISSED APCH AND WE GOT THE 'WOOP WOOP, PULL UP' RECORDED WARNING INDICATING A 1500 FPM RATE OF DSCNT. I PULLED UP THE NOSE SLIGHTLY AND INCREASED PWR ABOVE THAT NORMALLY REQUIRED THE PROFILE. THE 'WOOP WOOP' CEASED BUT THE AIRSPD BEGAN TO DECREASE. THE CAPT SAID, 'FIRE WALL THEM, LET'S GET OUT OF HERE.' I DID AND THE ACFT RESPONDED IMMEDIATELY WITH NO FURTHER LOSS OF ALT OR AIRSPEED.
Data retrieved from NASA's ASRS site as of August 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.