 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B727 aircraft at leveloff hit severe updraft resulting in altitude overshot of 400 ft before reporter captain could return aircraft to assigned altitude.
| Attributes | |
| ACN | 399950 |
| Time | |
| Date | 199804 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dtw |
| State Reference | MT |
| Altitude | msl bound lower : 29000 msl bound upper : 29400 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | controller non radar : 8 controller radar : 13 controller supervisory : 4 flight time last 90 days : 100 flight time total : 12000 |
| ASRS Report | 399950 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
On climb out of dtw on the 202 degree radial to vwv, encountered cumulo nimbus and thunderstorms. Reported tops at FL330, starting at about FL180. On leveloff, hit severe updraft. Autoplt couldn't hold, clicked off autoplt. Aircraft climbed to FL294 for 10 seconds. Started descent immediately to FL290. Told ATC, informed them of our altitude. No further discussion (very unstable air all altitudes).
Original NASA ASRS Text
Title: B727 ACFT AT LEVELOFF HIT SEVERE UPDRAFT RESULTING IN ALT OVERSHOT OF 400 FT BEFORE RPTR CAPT COULD RETURN ACFT TO ASSIGNED ALT.
Narrative: ON CLBOUT OF DTW ON THE 202 DEG RADIAL TO VWV, ENCOUNTERED CUMULO NIMBUS AND TSTMS. RPTED TOPS AT FL330, STARTING AT ABOUT FL180. ON LEVELOFF, HIT SEVERE UPDRAFT. AUTOPLT COULDN'T HOLD, CLICKED OFF AUTOPLT. ACFT CLBED TO FL294 FOR 10 SECONDS. STARTED DSCNT IMMEDIATELY TO FL290. TOLD ATC, INFORMED THEM OF OUR ALT. NO FURTHER DISCUSSION (VERY UNSTABLE AIR ALL ALTS).
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.