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B757 flight crew, operating in IMC, hit a thunderstorm. The aircraft experienced updrafts and turbulence, and had an overspd.
| Attributes | |
| ACN | 596942 |
| Time | |
| Date | 200310 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zma.artcc |
| State Reference | FL |
| Altitude | msl bound lower : 37000 msl bound upper : 37400 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Thunderstorm Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Route In Use | enroute airway : v115.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : private pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 596942 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter : turbulence inflight encounter other non adherence : company policies non adherence : published procedure other anomaly other anomaly other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control flight crew : returned to assigned altitude flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
En route from atl to tist on airway T115 at FL370. In clouds at the time with radar operating on 80 NM range and tilt approximately 1 degree down, we apparently clipped the top of a cell. Aircraft pitched up, autoplt disengaged, and airspeed increased exceeding 'vmmo' by approximately 2-3 KTS. Aircraft climbed approximately 2-3 KTS. Aircraft climbed approximately 400 ft before we were able to gain control and return to assigned altitude. During upset, moderate turbulence encountered for approximately 10-15 seconds. No one was injured and radar apparently never picked up any returns of the cell we clipped.
Original NASA ASRS Text
Title: B757 FLT CREW, OPERATING IN IMC, HIT A TSTM. THE ACFT EXPERIENCED UPDRAFTS AND TURB, AND HAD AN OVERSPD.
Narrative: ENRTE FROM ATL TO TIST ON AIRWAY T115 AT FL370. IN CLOUDS AT THE TIME WITH RADAR OPERATING ON 80 NM RANGE AND TILT APPROX 1 DEG DOWN, WE APPARENTLY CLIPPED THE TOP OF A CELL. ACFT PITCHED UP, AUTOPLT DISENGAGED, AND AIRSPD INCREASED EXCEEDING 'VMMO' BY APPROX 2-3 KTS. ACFT CLBED APPROX 2-3 KTS. ACFT CLBED APPROX 400 FT BEFORE WE WERE ABLE TO GAIN CTL AND RETURN TO ASSIGNED ALT. DURING UPSET, MODERATE TURB ENCOUNTERED FOR APPROX 10-15 SECONDS. NO ONE WAS INJURED AND RADAR APPARENTLY NEVER PICKED UP ANY RETURNS OF THE CELL WE CLIPPED.
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.