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A DC10 crew fails to note a disconnect of their #2 autoplt and automatic thrust with the aircraft climbing 600 ft before corrective action is taken by the crew, east of obh, northeast.
| Attributes | |
| ACN | 494990 |
| Time | |
| Date | 200012 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| State Reference | NE |
| Altitude | msl bound lower : 33000 msl bound upper : 33600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : j84.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 10500 flight time type : 2000 |
| ASRS Report | 494990 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 100 flight time total : 6100 flight time type : 2100 |
| ASRS Report | 494989 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
In cruise at FL330 with autoplt #2 engaged and autothrottles engaged, #2 autoplt disengaged along with autothrottle #2. The disengagement was not noticed for about 15 seconds, during which time the aircraft slowly climbed approximately 600 ft at which point the deviation was caught and the aircraft was then manually returned to FL330.
Original NASA ASRS Text
Title: A DC10 CREW FAILS TO NOTE A DISCONNECT OF THEIR #2 AUTOPLT AND AUTO THRUST WITH THE ACFT CLBING 600 FT BEFORE CORRECTIVE ACTION IS TAKEN BY THE CREW, E OF OBH, NE.
Narrative: IN CRUISE AT FL330 WITH AUTOPLT #2 ENGAGED AND AUTOTHROTTLES ENGAGED, #2 AUTOPLT DISENGAGED ALONG WITH AUTOTHROTTLE #2. THE DISENGAGEMENT WAS NOT NOTICED FOR ABOUT 15 SECONDS, DURING WHICH TIME THE ACFT SLOWLY CLBED APPROX 600 FT AT WHICH POINT THE DEV WAS CAUGHT AND THE ACFT WAS THEN MANUALLY RETURNED TO FL330.
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.