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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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FK10 had been cleared from FL260 to FL240. All the proper buttons were pushed but the autoplt failed to descend the aircraft. ATC confirmed they were cleared to FL240 and they then descended. Flight crew was not monitoring the aircraft performance.
| Attributes | |
| ACN | 367230 |
| Time | |
| Date | 199704 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : oxi |
| State Reference | IN |
| Altitude | msl bound lower : 24000 msl bound upper : 26000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| 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 | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 367230 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 367403 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : undershoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared to FL240 and pushed flight level change as we were given a new frequency by center. By the time we checked in and talked about going to oxi, we noticed that we were still at FL260. We questioned the controller to verify the proper altitude, and he asked us what we were originally cleared to. We said FL240 but to please verify. He cleared us to FL240 with no problems or incursions. I realize we should be more vigilant when switching altitudes and frequencys. Sometimes the airplane doesn't always engage when asked to perform a task. Verification is paramount.
Original NASA ASRS Text
Title: FK10 HAD BEEN CLRED FROM FL260 TO FL240. ALL THE PROPER BUTTONS WERE PUSHED BUT THE AUTOPLT FAILED TO DSND THE ACFT. ATC CONFIRMED THEY WERE CLRED TO FL240 AND THEY THEN DSNDED. FLC WAS NOT MONITORING THE ACFT PERFORMANCE.
Narrative: WE WERE CLRED TO FL240 AND PUSHED FLT LEVEL CHANGE AS WE WERE GIVEN A NEW FREQ BY CTR. BY THE TIME WE CHKED IN AND TALKED ABOUT GOING TO OXI, WE NOTICED THAT WE WERE STILL AT FL260. WE QUESTIONED THE CTLR TO VERIFY THE PROPER ALT, AND HE ASKED US WHAT WE WERE ORIGINALLY CLRED TO. WE SAID FL240 BUT TO PLEASE VERIFY. HE CLRED US TO FL240 WITH NO PROBS OR INCURSIONS. I REALIZE WE SHOULD BE MORE VIGILANT WHEN SWITCHING ALTS AND FREQS. SOMETIMES THE AIRPLANE DOESN'T ALWAYS ENGAGE WHEN ASKED TO PERFORM A TASK. VERIFICATION IS PARAMOUNT.
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.