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Aircraft equipment problem malfunction with autoplt noses aircraft over and creates an altitude deviation altitude excursion.
| Attributes | |
| ACN | 204326 |
| Time | |
| Date | 199203 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 10500 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord tower : roc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 75 flight time total : 4000 flight time type : 500 |
| ASRS Report | 204326 |
| 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 non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
We were in straight and level flight, approximately 50 mi southeast of ord at 11000 ft with the autoplt engaged when the aircraft went into a nose dive. We lost 500 ft before we were able to recover. We did not interfere with any other traffic that we know of, but ATC did remind us of our cleared altitude. Maintenance did check the autoplt.
Original NASA ASRS Text
Title: ACFT EQUIP PROBLEM MALFUNCTION WITH AUTOPLT NOSES ACFT OVER AND CREATES AN ALTDEV ALT EXCURSION.
Narrative: WE WERE IN STRAIGHT AND LEVEL FLT, APPROX 50 MI SE OF ORD AT 11000 FT WITH THE AUTOPLT ENGAGED WHEN THE ACFT WENT INTO A NOSE DIVE. WE LOST 500 FT BEFORE WE WERE ABLE TO RECOVER. WE DID NOT INTERFERE WITH ANY OTHER TFC THAT WE KNOW OF, BUT ATC DID REMIND US OF OUR CLRED ALT. MAINT DID CHK THE AUTOPLT.
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.