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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Autoplt trips off in a DC8-71 when it encounters severe turbulence in cruise at FL330. Aircraft loses 400 ft in episode. Crew notifies ATC of turbulence.
| Attributes | |
| ACN | 367979 |
| Time | |
| Date | 199704 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : vxv |
| State Reference | TN |
| Altitude | msl bound lower : 32600 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Heavy Transport, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 3200 flight time type : 750 |
| ASRS Report | 367979 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude inflight encounter other non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
In cruise at FL330, aircraft experienced severe turbulence. Autoplt disconnected and PF took control of aircraft. Severe turbulence lasted 10-15 seconds, aircraft deviated altitude approximately 400 ft. Severe turbulence was immediately reported to ATC.
Original NASA ASRS Text
Title: AUTOPLT TRIPS OFF IN A DC8-71 WHEN IT ENCOUNTERS SEVERE TURB IN CRUISE AT FL330. ACFT LOSES 400 FT IN EPISODE. CREW NOTIFIES ATC OF TURB.
Narrative: IN CRUISE AT FL330, ACFT EXPERIENCED SEVERE TURB. AUTOPLT DISCONNECTED AND PF TOOK CTL OF ACFT. SEVERE TURB LASTED 10-15 SECONDS, ACFT DEVIATED ALT APPROX 400 FT. SEVERE TURB WAS IMMEDIATELY RPTED TO ATC.
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.