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Air carrier large transport has downdraft encounter due to thunderstorm activity during IAP ILS approach and performs missed approach procedure.
| Attributes | |
| ACN | 189648 |
| Time | |
| Date | 199109 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | agl bound lower : 300 agl bound upper : 1100 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : atl |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach landing : missed approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 15000 flight time type : 2500 |
| ASRS Report | 189648 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : ground less severe inflight encounter : weather other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
We were cleared for an approach to 26R atl hartsfield airport. At approximately XY20 am, sep/thu/91. Atl reported 4000 ft ceiling, 3 mi visibility. After passing LOM and at approximately 800-1100 ft AGL, we entered a small cloud bank observing part of the runway environment. I went back on my instruments then I saw the approach leveling in lights and approach environment so I was both in and out of the cockpit when it seemed like somebody threw a huge bucket of water over us. We had experienced a sudden rain shower that was heavy. I transferred back to my instruments and discovered that we were below the glide path 1 DOT to 1 1/2 dots low. I corrected immediately then we went below again. This time I realized it was not a good situation so I executed a go around. It took full power to come out of this situation. Then, all of a sudden, we were clear -- just like nothing had happened. We notified atl approach, came back around and landed in almost VFR conditions. Quite an experience that makes one grow old faster.
Original NASA ASRS Text
Title: ACR LGT HAS DOWNDRAFT ENCOUNTER DUE TO TSTM ACTIVITY DURING IAP ILS APCH AND PERFORMS MISSED APCH PROC.
Narrative: WE WERE CLRED FOR AN APCH TO 26R ATL HARTSFIELD ARPT. AT APPROX XY20 AM, SEP/THU/91. ATL RPTED 4000 FT CEILING, 3 MI VISIBILITY. AFTER PASSING LOM AND AT APPROX 800-1100 FT AGL, WE ENTERED A SMALL CLOUD BANK OBSERVING PART OF THE RWY ENVIRONMENT. I WENT BACK ON MY INSTS THEN I SAW THE APCH LEVELING IN LIGHTS AND APCH ENVIRONMENT SO I WAS BOTH IN AND OUT OF THE COCKPIT WHEN IT SEEMED LIKE SOMEBODY THREW A HUGE BUCKET OF WATER OVER US. WE HAD EXPERIENCED A SUDDEN RAIN SHOWER THAT WAS HVY. I TRANSFERRED BACK TO MY INSTS AND DISCOVERED THAT WE WERE BELOW THE GLIDE PATH 1 DOT TO 1 1/2 DOTS LOW. I CORRECTED IMMEDIATELY THEN WE WENT BELOW AGAIN. THIS TIME I REALIZED IT WAS NOT A GOOD SITUATION SO I EXECUTED A GAR. IT TOOK FULL PWR TO COME OUT OF THIS SITUATION. THEN, ALL OF A SUDDEN, WE WERE CLR -- JUST LIKE NOTHING HAD HAPPENED. WE NOTIFIED ATL APCH, CAME BACK AROUND AND LANDED IN ALMOST VFR CONDITIONS. QUITE AN EXPERIENCE THAT MAKES ONE GROW OLD FASTER.
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.