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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier on downwind reacts to TCASII RA by climbing for a departing aircraft. Separation by controller was assured.
| Attributes | |
| ACN | 260639 |
| Time | |
| Date | 199401 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 9000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc military facility : hif |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 6 |
| ASRS Report | 260639 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : took evasive action none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft in downwind was told about a departure climbing to an altitude 1000 ft below. Downwind aircraft climbed as departure passed 1 1/2 mi and 1000 ft behind! Pilot did advise he was climbing. Sounds like a TCASII/TCASII logic problem in software. RA should never have been issued. Call signs were arrival air carrier X, departure air carrier Y.
Original NASA ASRS Text
Title: ACR ON DOWNWIND REACTS TO TCASII RA BY CLBING FOR A DEPARTING ACFT. SEPARATION BY CTLR WAS ASSURED.
Narrative: ACFT IN DOWNWIND WAS TOLD ABOUT A DEP CLBING TO AN ALT 1000 FT BELOW. DOWNWIND ACFT CLBED AS DEP PASSED 1 1/2 MI AND 1000 FT BEHIND! PLT DID ADVISE HE WAS CLBING. SOUNDS LIKE A TCASII/TCASII LOGIC PROB IN SOFTWARE. RA SHOULD NEVER HAVE BEEN ISSUED. CALL SIGNS WERE ARR ACR X, DEP ACR Y.
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.