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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An F10 flying in ZDC airspace has an uncommanded dive after altitude capture and loses 500 ft. Aircraft is easily flown back to 15000 ft cruise altitude.
| Attributes | |
| ACN | 374065 |
| Time | |
| Date | 199707 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : aml |
| State Reference | VA |
| Altitude | msl bound lower : 14500 msl bound upper : 15000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 374065 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
XA45Z, frequency unknown, altitude 15000 ft. ATC facility: dulles approach. Location: trixy intersection. On the bucko 4 arrival to dca, just outside trixy intersection, after capturing 15000 ft, autoplt went into an uncommanded dive. Both autoplt and autothrottles were disconnected and dive was arrested by 14500 ft. Aircraft was hand flown back to 15000 ft and manually flown for remainder of flight. No communication was exchanged with dulles approach regarding deviation or other aircraft conflict.
Original NASA ASRS Text
Title: AN F10 FLYING IN ZDC AIRSPACE HAS AN UNCOMMANDED DIVE AFTER ALT CAPTURE AND LOSES 500 FT. ACFT IS EASILY FLOWN BACK TO 15000 FT CRUISE ALT.
Narrative: XA45Z, FREQ UNKNOWN, ALT 15000 FT. ATC FACILITY: DULLES APCH. LOCATION: TRIXY INTXN. ON THE BUCKO 4 ARR TO DCA, JUST OUTSIDE TRIXY INTXN, AFTER CAPTURING 15000 FT, AUTOPLT WENT INTO AN UNCOMMANDED DIVE. BOTH AUTOPLT AND AUTOTHROTTLES WERE DISCONNECTED AND DIVE WAS ARRESTED BY 14500 FT. ACFT WAS HAND FLOWN BACK TO 15000 FT AND MANUALLY FLOWN FOR REMAINDER OF FLT. NO COM WAS EXCHANGED WITH DULLES APCH REGARDING DEV OR OTHER ACFT CONFLICT.
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.