 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Ace display system was OTS and refusing to display aircraft rtes. Data system person made some entries at each position to correct the problem and these entries are unknown to the controllers. Later the display was showing old rtes for aircraft which if used would have created a problem for the ZFW ARTCC.
| Attributes | |
| ACN | 350556 |
| Time | |
| Date | 199610 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar pilot : private |
| Experience | controller radar : 13 flight time total : 300 |
| ASRS Report | 350556 |
| Person 2 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
The ace display system started off this morning (at approximately XA30Z) by refusing to display requested pages at several position. It would keep flashing 'downloading page' and would eventually give up and return to the menu. The person in charge of the system said it had gone to a backup procedure and he made a few entries at each position to bring the display back. These entries are not known by the controllers. Therefore, when the ace goes to its backup the system is effectively OTS. Also, there was no indication that this was the problem so even if the controllers knew the entries it would have been a trial and error situation to bring up the displays. The controllers don't have time for that. At approximately XO40Z the ace display started showing routings on the departure rtes page (page 150) that were old. (With thunderstorms in the area these were changing frequently.) the departure controllers could have sent aircraft out rtes that would have caused problems for the center (ZFW) had they followed the information displayed on their monitors.
Original NASA ASRS Text
Title: ACE DISPLAY SYS WAS OTS AND REFUSING TO DISPLAY ACFT RTES. DATA SYS PERSON MADE SOME ENTRIES AT EACH POS TO CORRECT THE PROB AND THESE ENTRIES ARE UNKNOWN TO THE CTLRS. LATER THE DISPLAY WAS SHOWING OLD RTES FOR ACFT WHICH IF USED WOULD HAVE CREATED A PROB FOR THE ZFW ARTCC.
Narrative: THE ACE DISPLAY SYS STARTED OFF THIS MORNING (AT APPROX XA30Z) BY REFUSING TO DISPLAY REQUESTED PAGES AT SEVERAL POS. IT WOULD KEEP FLASHING 'DOWNLOADING PAGE' AND WOULD EVENTUALLY GIVE UP AND RETURN TO THE MENU. THE PERSON IN CHARGE OF THE SYS SAID IT HAD GONE TO A BACKUP PROC AND HE MADE A FEW ENTRIES AT EACH POS TO BRING THE DISPLAY BACK. THESE ENTRIES ARE NOT KNOWN BY THE CTLRS. THEREFORE, WHEN THE ACE GOES TO ITS BACKUP THE SYS IS EFFECTIVELY OTS. ALSO, THERE WAS NO INDICATION THAT THIS WAS THE PROB SO EVEN IF THE CTLRS KNEW THE ENTRIES IT WOULD HAVE BEEN A TRIAL AND ERROR SIT TO BRING UP THE DISPLAYS. THE CTLRS DON'T HAVE TIME FOR THAT. AT APPROX XO40Z THE ACE DISPLAY STARTED SHOWING ROUTINGS ON THE DEP RTES PAGE (PAGE 150) THAT WERE OLD. (WITH TSTMS IN THE AREA THESE WERE CHANGING FREQUENTLY.) THE DEP CTLRS COULD HAVE SENT ACFT OUT RTES THAT WOULD HAVE CAUSED PROBS FOR THE CTR (ZFW) HAD THEY FOLLOWED THE INFO DISPLAYED ON THEIR MONITORS.
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.