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Sfo controller described amass anomaly when arrival aircraft data tag suddenly changed to another identification.
| Attributes | |
| ACN | 749579 |
| Time | |
| Date | 200708 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | landing : roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller limited radar : 10 controller non radar : 5 controller time certified in position1 : 6 |
| ASRS Report | 749579 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | FAA |
| Primary Problem | FAA |
Narrative:
The amass changed the call sign (tag) on a landing aircraft. The aircraft landing was air carrier X. Upon landing the aircraft was tagged up as aircraft Y. No corrective actions taken after informing management; no diagnostic check done or maintenance performed. This could potentially be very dangerous situation if this and other pieces of equipment are just randomly changing tags on aircraft.
Original NASA ASRS Text
Title: SFO CTLR DESCRIBED AMASS ANOMALY WHEN ARR ACFT DATA TAG SUDDENLY CHANGED TO ANOTHER ID.
Narrative: THE AMASS CHANGED THE CALL SIGN (TAG) ON A LNDG ACFT. THE ACFT LNDG WAS ACR X. UPON LNDG THE ACFT WAS TAGGED UP AS ACFT Y. NO CORRECTIVE ACTIONS TAKEN AFTER INFORMING MGMNT; NO DIAGNOSTIC CHK DONE OR MAINT PERFORMED. THIS COULD POTENTIALLY BE VERY DANGEROUS SITUATION IF THIS AND OTHER PIECES OF EQUIP ARE JUST RANDOMLY CHANGING TAGS ON ACFT.
Data retrieved from NASA's ASRS site as of January 2009 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.