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Approach controller at cos states that the low altitude alert and conflict alert aural alarm associated with the ARTS iia system at cos is too loud and interferes with air to ground communication with aircraft.
| Attributes | |
| ACN | 408890 |
| Time | |
| Date | 199807 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cos |
| State Reference | CO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar pilot : private |
| Experience | controller radar : 10 flight time total : 41 |
| ASRS Report | 408890 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility procedure or policy : unspecified |
| Navigational Aid | Unspecified |
Narrative:
ARTS iia low altitude/conflict alert audible tone is too loud and interferes with ground-to-ground and air-to-ground communications. After a transmission to air carrier X, during which the tone was sounding, the pilot advised that a 'loud beeping tone in the background' was making it difficult to hear the controller.
Original NASA ASRS Text
Title: APCH CTLR AT COS STATES THAT THE LOW ALT ALERT AND CONFLICT ALERT AURAL ALARM ASSOCIATED WITH THE ARTS IIA SYS AT COS IS TOO LOUD AND INTERFERES WITH AIR TO GND COM WITH ACFT.
Narrative: ARTS IIA LOW ALT/CONFLICT ALERT AUDIBLE TONE IS TOO LOUD AND INTERFERES WITH GND-TO-GND AND AIR-TO-GND COMS. AFTER A XMISSION TO ACR X, DURING WHICH THE TONE WAS SOUNDING, THE PLT ADVISED THAT A 'LOUD BEEPING TONE IN THE BACKGROUND' WAS MAKING IT DIFFICULT TO HEAR THE CTLR.
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.