 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Aircraft equipment problem. Autoplt DFGS in performance mode climbing, switched to vertical speed descent uncommanded. Altitude deviation.
| Attributes | |
| ACN | 320339 |
| Time | |
| Date | 199511 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : aml |
| State Reference | VA |
| Altitude | msl bound lower : 17700 msl bound upper : 19000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 320339 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : clearance other anomaly other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : overcame equipment problem flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On climb out, 18 mi west of aml, climbing from FL185 to FL190, autoplt/DFGS in performance mode without manipulation of any kind, suddenly switched to vertical speed into a descent. Aircraft pitched down accordingly. Recovery was made at 17700 ft and a normal climb was reestablished. No repeat occurred.
Original NASA ASRS Text
Title: ACFT EQUIP PROB. AUTOPLT DFGS IN PERFORMANCE MODE CLBING, SWITCHED TO VERT SPD DSCNT UNCOMMANDED. ALTDEV.
Narrative: ON CLBOUT, 18 MI W OF AML, CLBING FROM FL185 TO FL190, AUTOPLT/DFGS IN PERFORMANCE MODE WITHOUT MANIPULATION OF ANY KIND, SUDDENLY SWITCHED TO VERT SPD INTO A DSCNT. ACFT PITCHED DOWN ACCORDINGLY. RECOVERY WAS MADE AT 17700 FT AND A NORMAL CLB WAS REESTABLISHED. NO REPEAT OCCURRED.
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.