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Approach controller was questioned about proximity of traffic by a DHC8 flight crew who was getting a TCASII RA. Controller advised flight crew nearest traffic was 600 ft below. Flight crew turned off their TCASII for safety reasons.
| Attributes | |
| ACN | 341980 |
| Time | |
| Date | 199607 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : pie airport : tpa |
| State Reference | FL |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : tpa |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar pilot : commercial |
| Experience | controller radar : 16 flight time total : 400 |
| ASRS Report | 341980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Air carrier, DHC8, asked the controller if there was any traffic in their vicinity. The controller advised the air carrier of the nearest aircraft that was at 2400 ft, below the air carrier. The air carrier said this is not working and turned his TCASII off for safety reasons! I always add 1000 ft and 3-5 extra mi above minimum separation, reducing my capacity, since TCASII came to be. TCASII impacts ATC by reducing capacity of airspace while the FAA mandates we work the continuing increase of traffic. If this aircraft was stacked with another he would have climbed into it not knowing he was getting an erroneous RA that the pilot is mandated to fly. In summary, impact of 2 aircraft due to TCASII is imminent.
Original NASA ASRS Text
Title: APCH CTLR WAS QUESTIONED ABOUT PROX OF TFC BY A DHC8 FLC WHO WAS GETTING A TCASII RA. CTLR ADVISED FLC NEAREST TFC WAS 600 FT BELOW. FLC TURNED OFF THEIR TCASII FOR SAFETY REASONS.
Narrative: ACR, DHC8, ASKED THE CTLR IF THERE WAS ANY TFC IN THEIR VICINITY. THE CTLR ADVISED THE ACR OF THE NEAREST ACFT THAT WAS AT 2400 FT, BELOW THE ACR. THE ACR SAID THIS IS NOT WORKING AND TURNED HIS TCASII OFF FOR SAFETY REASONS! I ALWAYS ADD 1000 FT AND 3-5 EXTRA MI ABOVE MINIMUM SEPARATION, REDUCING MY CAPACITY, SINCE TCASII CAME TO BE. TCASII IMPACTS ATC BY REDUCING CAPACITY OF AIRSPACE WHILE THE FAA MANDATES WE WORK THE CONTINUING INCREASE OF TFC. IF THIS ACFT WAS STACKED WITH ANOTHER HE WOULD HAVE CLBED INTO IT NOT KNOWING HE WAS GETTING AN ERRONEOUS RA THAT THE PLT IS MANDATED TO FLY. IN SUMMARY, IMPACT OF 2 ACFT DUE TO TCASII IS IMMINENT.
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.