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Altitude deviation altitude excursion -- air carrier hits severe turbulence resulting in altitude excursions, injuries and return to the departure airport.
| Attributes | |
| ACN | 310646 |
| Time | |
| Date | 199507 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mia |
| State Reference | FL |
| Altitude | msl bound lower : 32900 msl bound upper : 33300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 310646 |
| 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 other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
About 15 mins after level off at FL330,the flight encountered a severe turbulence event which lasted for 3-5 seconds. Aircraft was at .78 mach with autoplt engaged and the seatbelt sign on. Radar was working correctly with only WX noted well south of course. Aircraft went quickly up to 33300 ft. Then back to 32900 ft. Autoplt automatically disconnected and first officer made a manual level off at FL330. No other turbulence was noted at this altitude. After conferring with the purser, he indicated that several passenger and flight attendants were injured. Captain went to the cabin to access the situation. Injuries indicated that a return to miami and a call for paramedics would be required. Landing was uneventful and ambulances were awaiting aircraft upon gate arrival.
Original NASA ASRS Text
Title: ALTDEV ALT EXCURSION -- ACR HITS SEVERE TURB RESULTING IN ALT EXCURSIONS, INJURIES AND RETURN TO THE DEP ARPT.
Narrative: ABOUT 15 MINS AFTER LEVEL OFF AT FL330,THE FLT ENCOUNTERED A SEVERE TURB EVENT WHICH LASTED FOR 3-5 SECONDS. ACFT WAS AT .78 MACH WITH AUTOPLT ENGAGED AND THE SEATBELT SIGN ON. RADAR WAS WORKING CORRECTLY WITH ONLY WX NOTED WELL S OF COURSE. ACFT WENT QUICKLY UP TO 33300 FT. THEN BACK TO 32900 FT. AUTOPLT AUTOMATICALLY DISCONNECTED AND FO MADE A MANUAL LEVEL OFF AT FL330. NO OTHER TURB WAS NOTED AT THIS ALT. AFTER CONFERRING WITH THE PURSER, HE INDICATED THAT SEVERAL PAX AND FLT ATTENDANTS WERE INJURED. CAPT WENT TO THE CABIN TO ACCESS THE SIT. INJURIES INDICATED THAT A RETURN TO MIAMI AND A CALL FOR PARAMEDICS WOULD BE REQUIRED. LNDG WAS UNEVENTFUL AND AMBULANCES WERE AWAITING ACFT UPON GATE ARR.
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.