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An md-S80 crew, holding over okk VOR, encountered a 96 KT crosswind and were compensating when the autoplt kicked off after it sensed the difference in headings. They re-engaged the autoplt and the aircraft climbed above their assigned altitude by 400 ft.
| Attributes | |
| ACN | 457110 |
| Time | |
| Date | 199912 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : okk.vor |
| State Reference | IN |
| Altitude | msl bound lower : 26000 msl bound upper : 26400 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.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 | cruise : holding |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 457110 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| ASRS Report | 457111 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter other non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overrode automation flight crew : returned to assigned altitude |
| Consequence | other |
| Supplementary | |
| Problem Areas | Weather Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Holding over okk VOR, got a horizon light due to headings being off. Autoplt disengaged automatically. Hand flew until headings were in agreement and on altitude. When autoplt was re-engaged, the altitude shot up to FL264 for a few seconds until autoplt could be disengaged and hand flown back down to FL260. No comment from ZID. Did not observe any other conflicting aircraft near us on TCASII. Difficult to fly 10 mi legs with 96 KT wind from west in depicted holding pattern.
Original NASA ASRS Text
Title: AN MD-S80 CREW, HOLDING OVER OKK VOR, ENCOUNTERED A 96 KT XWIND AND WERE COMPENSATING WHEN THE AUTOPLT KICKED OFF AFTER IT SENSED THE DIFFERENCE IN HDGS. THEY RE-ENGAGED THE AUTOPLT AND THE ACFT CLBED ABOVE THEIR ASSIGNED ALT BY 400 FT.
Narrative: HOLDING OVER OKK VOR, GOT A HORIZON LIGHT DUE TO HDGS BEING OFF. AUTOPLT DISENGAGED AUTOMATICALLY. HAND FLEW UNTIL HDGS WERE IN AGREEMENT AND ON ALT. WHEN AUTOPLT WAS RE-ENGAGED, THE ALT SHOT UP TO FL264 FOR A FEW SECONDS UNTIL AUTOPLT COULD BE DISENGAGED AND HAND FLOWN BACK DOWN TO FL260. NO COMMENT FROM ZID. DID NOT OBSERVE ANY OTHER CONFLICTING ACFT NEAR US ON TCASII. DIFFICULT TO FLY 10 MI LEGS WITH 96 KT WIND FROM W IN DEPICTED HOLDING PATTERN.
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.