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Flight crew of a B737 climbed in response to a TCASII RA during level at an intermediate altitude during a STAR arrival.
| Attributes | |
| ACN | 489171 |
| Time | |
| Date | 200010 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mci.airport |
| State Reference | MO |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mci.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 35 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : mci.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| ASRS Report | 489171 |
| Person 2 | |
| Affiliation | other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 6000 vertical : 1000 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
I was working departure. Cpr departure's airport nebound IFR. Conflicting traffic being worked by arrival B737 descending to 12000 ft on STAR. Vectored cpr towards B737 track stopped at 10000 ft. Issued traffic to cpr. When aircraft 4 mi apart cpr reported traffic in sight. Advised arrival that air carrier had B737 in sight and would maintain visual climb. Climbed air carrier to 15000 ft. B737 advised arrival that he was receiving RA and climbing. Why would TCASII advise climb? B737 level at 12000 ft can never out climb LR35 leaving 10000 ft climbing. TCASII in this instance made a routine operation potentially unsafe.
Original NASA ASRS Text
Title: FLC OF A B737 CLBED IN RESPONSE TO A TCASII RA DURING LEVEL AT AN INTERMEDIATE ALT DURING A STAR ARR.
Narrative: I WAS WORKING DEP. CPR DEP'S ARPT NEBOUND IFR. CONFLICTING TFC BEING WORKED BY ARR B737 DSNDING TO 12000 FT ON STAR. VECTORED CPR TOWARDS B737 TRACK STOPPED AT 10000 FT. ISSUED TFC TO CPR. WHEN ACFT 4 MI APART CPR RPTED TFC IN SIGHT. ADVISED ARR THAT ACR HAD B737 IN SIGHT AND WOULD MAINTAIN VISUAL CLB. CLBED ACR TO 15000 FT. B737 ADVISED ARR THAT HE WAS RECEIVING RA AND CLBING. WHY WOULD TCASII ADVISE CLB? B737 LEVEL AT 12000 FT CAN NEVER OUT CLB LR35 LEAVING 10000 FT CLBING. TCASII IN THIS INSTANCE MADE A ROUTINE OP POTENTIALLY UNSAFE.
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.