 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Altitude deviation altitude overshot when use of the indicated airspeed wheel on the MCP interrupted the automatic capture feature of the autoplt. Night operation IAP ILS approach.
| Attributes | |
| ACN | 355441 |
| Time | |
| Date | 199612 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dca |
| State Reference | DC |
| Altitude | msl bound lower : 2100 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : dca |
| Operator | common carrier : air carrier |
| Make Model Name | MD-90 Series (DC-9-90) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : private pilot : flight engineer pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 180 flight time total : 9000 flight time type : 2000 |
| ASRS Report | 355441 |
| 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 : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared to descend to 2500 ft. The autoplt failed to capture. At 2200 ft, I took over manually. We bottomed out at 2100 ft. We climbed back up to 2400 ft and was then given a further descent. Incident may have been caused by my touching the IAS wheel. I'm not sure.
Original NASA ASRS Text
Title: ALTDEV ALT OVERSHOT WHEN USE OF THE INDICATED AIRSPD WHEEL ON THE MCP INTERRUPTED THE AUTO CAPTURE FEATURE OF THE AUTOPLT. NIGHT OP IAP ILS APCH.
Narrative: WE WERE CLRED TO DSND TO 2500 FT. THE AUTOPLT FAILED TO CAPTURE. AT 2200 FT, I TOOK OVER MANUALLY. WE BOTTOMED OUT AT 2100 FT. WE CLBED BACK UP TO 2400 FT AND WAS THEN GIVEN A FURTHER DSCNT. INCIDENT MAY HAVE BEEN CAUSED BY MY TOUCHING THE IAS WHEEL. I'M NOT SURE.
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.