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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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3 engine widebody transport encountered turbulence. Autothrottles and autoplt disconnected and aircraft gained 250 ft. This resulted in a TCASII TA.
| Attributes | |
| ACN | 364790 |
| Time | |
| Date | 199703 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cew |
| State Reference | FL |
| Altitude | msl bound lower : 37000 msl bound upper : 37250 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 364790 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Deviating for WX approximately 50 mi wnw of cew at 37000 ft. Encountered WX (turbulence) not visible on radar that had moderate turbulence. At the onset of turbulence, the autothrottle (right) and autoplt disconnected. Airspeed and altitude increased slightly and 5-10 seconds later, we had a TA, maximum altitude deviation was approximately 250 ft.
Original NASA ASRS Text
Title: 3 ENG WDB ENCOUNTERED TURB. AUTOTHROTTLES AND AUTOPLT DISCONNECTED AND ACFT GAINED 250 FT. THIS RESULTED IN A TCASII TA.
Narrative: DEVIATING FOR WX APPROX 50 MI WNW OF CEW AT 37000 FT. ENCOUNTERED WX (TURB) NOT VISIBLE ON RADAR THAT HAD MODERATE TURB. AT THE ONSET OF TURB, THE AUTOTHROTTLE (R) AND AUTOPLT DISCONNECTED. AIRSPD AND ALT INCREASED SLIGHTLY AND 5-10 SECONDS LATER, WE HAD A TA, MAX ALTDEV WAS APPROX 250 FT.
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.