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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier medium large transport in a holding pattern at FL350 enters the edge of a thunderstorm and experiences an upset with loss of aircraft control. The aircraft loses 2000 ft in the event.
| Attributes | |
| ACN | 398854 |
| Time | |
| Date | 199804 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : hmv |
| State Reference | TN |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 175 flight time total : 9000 flight time type : 500 |
| ASRS Report | 398854 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter other non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control flight crew : exited adverse environment |
| Consequence | faa : assigned or threatened penalties |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
While flying a present position hold at FL350 en route to atlanta from newburgh, ny, encountered embedded thunderstorm at north end of holding pattern. We were nearly overhead the hmv VOR. The radar was tuned up. We were in and out of tops. We popped out while in a turn at north end of holding pattern, saw distinct cell. We flew into the southern edge of cell, got abrupt left wing up 90 degrees. Autoplt kicked off. We knifed down 2000 ft while rolling wings level and generally regaining control. I called center, told them we were at FL330, getting out of thunderstorm. He cleared us to do what we had to do to remedy situation. We shortly exited cell, told center we were on our way back up to FL350. Asked for new holding fix to the south, which we got. No injuries. No traffic conflict. No damage. Remainder of flight uneventful.
Original NASA ASRS Text
Title: AN ACR MLG IN A HOLDING PATTERN AT FL350 ENTERS THE EDGE OF A TSTM AND EXPERIENCES AN UPSET WITH LOSS OF ACFT CTL. THE ACFT LOSES 2000 FT IN THE EVENT.
Narrative: WHILE FLYING A PRESENT POS HOLD AT FL350 ENRTE TO ATLANTA FROM NEWBURGH, NY, ENCOUNTERED EMBEDDED TSTM AT N END OF HOLDING PATTERN. WE WERE NEARLY OVERHEAD THE HMV VOR. THE RADAR WAS TUNED UP. WE WERE IN AND OUT OF TOPS. WE POPPED OUT WHILE IN A TURN AT N END OF HOLDING PATTERN, SAW DISTINCT CELL. WE FLEW INTO THE SOUTHERN EDGE OF CELL, GOT ABRUPT L WING UP 90 DEGS. AUTOPLT KICKED OFF. WE KNIFED DOWN 2000 FT WHILE ROLLING WINGS LEVEL AND GENERALLY REGAINING CTL. I CALLED CTR, TOLD THEM WE WERE AT FL330, GETTING OUT OF TSTM. HE CLRED US TO DO WHAT WE HAD TO DO TO REMEDY SIT. WE SHORTLY EXITED CELL, TOLD CTR WE WERE ON OUR WAY BACK UP TO FL350. ASKED FOR NEW HOLDING FIX TO THE S, WHICH WE GOT. NO INJURIES. NO TFC CONFLICT. NO DAMAGE. REMAINDER OF FLT UNEVENTFUL.
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.