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ZBW controller involved in operational error between a B777 and a C340 due to a 'timed out' data block. Controller does not feel a data block should 'time out.'
| Attributes | |
| ACN | 624043 |
| Time | |
| Date | 200407 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : trait |
| State Reference | RI |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc artcc : mdsd.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | general aviation : personal |
| Make Model Name | Cessna 340/340A |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental pilot : instrument |
| Experience | controller time certified in position1 : 0 controller time certified in position2 : 0.25 flight time total : 260 |
| ASRS Report | 624043 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Miss Distance | vertical : 700 |
| Supplementary | |
| Problem Areas | Navigational Facility ATC Human Performance FAA |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | computer equipment : zbw.artcc procedure or policy : zbw.artcc |
Narrative:
This operational error would not have occurred if the data block had not 'timed out.' this function is no longer necessary due to great increases in host computer power. The 'time out' function needs to be removed from ATC computer system in the interest of air safety.
Original NASA ASRS Text
Title: ZBW CTLR INVOLVED IN OPERROR BTWN A B777 AND A C340 DUE TO A 'TIMED OUT' DATA BLOCK. CTLR DOES NOT FEEL A DATA BLOCK SHOULD 'TIME OUT.'
Narrative: THIS OPERROR WOULD NOT HAVE OCCURRED IF THE DATA BLOCK HAD NOT 'TIMED OUT.' THIS FUNCTION IS NO LONGER NECESSARY DUE TO GREAT INCREASES IN HOST COMPUTER PWR. THE 'TIME OUT' FUNCTION NEEDS TO BE REMOVED FROM ATC COMPUTER SYS IN THE INTEREST OF AIR 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.