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An air carrier MD80 flight crew experienced severe turbulence and temporarily lost control of their aircraft which climbed and turned off course.
| Attributes | |
| ACN | 398283 |
| Time | |
| Date | 199803 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : sat |
| State Reference | TX |
| Altitude | msl bound lower : 22000 msl bound upper : 22300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 398283 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 398284 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather other anomaly other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
I had made a PA to the passenger that the seat belt sign was on and to make sure that their seat belts were securely fastened. We advised ATC that we needed another 30 mi on this heading before turning back toward aus. ATC concurred. Just as we started our turn back to aus, we hit a pocket of severe turbulence. The autoplt was knocked off line and the aircraft climbed 300 ft from our assigned altitude of FL220, and it turned 30 degrees right of course before I got it under control. It lasted only 15 seconds. ATC asked us why we had not turned at 30 mi and I answered that we had hit severe turbulence and were proceeding on course to aus now. He issued a PIREP to the aircraft behind us. I made a reassuring PA to the passenger and we proceeded to aus.
Original NASA ASRS Text
Title: AN ACR MD80 FLC EXPERIENCED SEVERE TURB AND TEMPORARILY LOST CTL OF THEIR ACFT WHICH CLBED AND TURNED OFF COURSE.
Narrative: I HAD MADE A PA TO THE PAX THAT THE SEAT BELT SIGN WAS ON AND TO MAKE SURE THAT THEIR SEAT BELTS WERE SECURELY FASTENED. WE ADVISED ATC THAT WE NEEDED ANOTHER 30 MI ON THIS HDG BEFORE TURNING BACK TOWARD AUS. ATC CONCURRED. JUST AS WE STARTED OUR TURN BACK TO AUS, WE HIT A POCKET OF SEVERE TURB. THE AUTOPLT WAS KNOCKED OFF LINE AND THE ACFT CLBED 300 FT FROM OUR ASSIGNED ALT OF FL220, AND IT TURNED 30 DEGS R OF COURSE BEFORE I GOT IT UNDER CTL. IT LASTED ONLY 15 SECONDS. ATC ASKED US WHY WE HAD NOT TURNED AT 30 MI AND I ANSWERED THAT WE HAD HIT SEVERE TURB AND WERE PROCEEDING ON COURSE TO AUS NOW. HE ISSUED A PIREP TO THE ACFT BEHIND US. I MADE A REASSURING PA TO THE PAX AND WE PROCEEDED TO AUS.
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.