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Flight crew of an large transport almost had an airborne conflict due to the delay in responding to an ATC descent clearance.
| Attributes | |
| ACN | 324430 |
| Time | |
| Date | 199512 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : buj |
| State Reference | TX |
| Altitude | msl bound lower : 25000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw tracon : mem |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8000 flight time type : 300 |
| ASRS Report | 324430 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
During holding ZFW asked us to descend 1000 ft and report leaving. As per captain's instructions I reported leaving the altitude while he finished programming the change into the autoplt. The aircraft was very slow responding and the other aircraft above us started to descend faster than ours. No conflict was reported, but it is another example of how state of the art automation puts not only more workload on pilots, but seems to open up more chances for compromising safety.
Original NASA ASRS Text
Title: FLC OF AN LGT ALMOST HAD AN AIRBORNE CONFLICT DUE TO THE DELAY IN RESPONDING TO AN ATC DSCNT CLRNC.
Narrative: DURING HOLDING ZFW ASKED US TO DSND 1000 FT AND RPT LEAVING. AS PER CAPT'S INSTRUCTIONS I RPTED LEAVING THE ALT WHILE HE FINISHED PROGRAMMING THE CHANGE INTO THE AUTOPLT. THE ACFT WAS VERY SLOW RESPONDING AND THE OTHER ACFT ABOVE US STARTED TO DSND FASTER THAN OURS. NO CONFLICT WAS RPTED, BUT IT IS ANOTHER EXAMPLE OF HOW STATE OF THE ART AUTOMATION PUTS NOT ONLY MORE WORKLOAD ON PLTS, BUT SEEMS TO OPEN UP MORE CHANCES FOR COMPROMISING SAFETY.
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.