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An S80 crew experiences a small altitude deviation when their autoplt is kicked off by a wake turbulence encounter from a preceding aircraft northeast or ord, il.
| Attributes | |
| ACN | 450099 |
| Time | |
| Date | 199909 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : pivot |
| State Reference | MI |
| Altitude | msl bound lower : 9800 msl bound upper : 10000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : approach descent : intermediate altitude |
| Route In Use | arrival star : ns |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 450099 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| ASRS Report | 450100 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude inflight encounter : wake turbulence non adherence : clearance other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control flight crew : overcame equipment problem flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Environmental Factor Airspace Structure Aircraft |
| Primary Problem | Airspace Structure |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Over pivot intersection, following traffic ahead 5 mi, encountered their wake turbulence. Autoplt clicked off and aircraft descended 200 ft to about 9800 ft. Copilot returned to 10000 ft.
Original NASA ASRS Text
Title: AN S80 CREW EXPERIENCES A SMALL ALTDEV WHEN THEIR AUTOPLT IS KICKED OFF BY A WAKE TURB ENCOUNTER FROM A PRECEDING ACFT NE OR ORD, IL.
Narrative: OVER PIVOT INTXN, FOLLOWING TFC AHEAD 5 MI, ENCOUNTERED THEIR WAKE TURB. AUTOPLT CLICKED OFF AND ACFT DSNDED 200 FT TO ABOUT 9800 FT. COPLT RETURNED TO 10000 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.