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B757 flight crew responds to TCASII RA caused by LJ60 climbing with visual separation through their altitude in ZMA airspace.
| Attributes | |
| ACN | 615775 |
| Time | |
| Date | 200404 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : dubbl |
| State Reference | FL |
| Altitude | msl single value : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 60 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 23148 flight time type : 1070 |
| ASRS Report | 615775 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 14500 flight time type : 800 |
| ASRS Report | 615770 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Miss Distance | horizontal : 1500 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Our aircraft level at 17000 ft. Other aircraft, lear, accepted VFR climb through our altitude. We received TCASII RA to climb 1000-1200 FPM. We did no have other aircraft in sight until it was off our right side. TCASII indicated 300 ft above us. First officer estimates horizontal distance to have been 1/4 mi even though other aircraft was indicating +300 ft on TCASII. Our RA then verbalized 'increase climb.' this occurred even though our vertical velocity was in the green band for our RA. We ultimately climbed to approximately 17800 ft MSL. When clear of conflict, we returned to 17000 ft MSL. Since we did not have traffic in sight, we had to follow our RA guidance. Since other aircraft had us in sight, he may have disregarded his RA guidance -- thus decreasing our vertical/horizontal separation. I believe both aircraft should have each other in sight to do VFR climb/dscnts. Supplemental information from acn 615770: in the future I think I would decline a VFR climb or descent if the other aircraft did not also have us in sight to avoid a TCASII induced conflict like this one.
Original NASA ASRS Text
Title: B757 FLT CREW RESPONDS TO TCASII RA CAUSED BY LJ60 CLBING WITH VISUAL SEPARATION THROUGH THEIR ALT IN ZMA AIRSPACE.
Narrative: OUR ACFT LEVEL AT 17000 FT. OTHER ACFT, LEAR, ACCEPTED VFR CLB THROUGH OUR ALT. WE RECEIVED TCASII RA TO CLB 1000-1200 FPM. WE DID NO HAVE OTHER ACFT IN SIGHT UNTIL IT WAS OFF OUR R SIDE. TCASII INDICATED 300 FT ABOVE US. FO ESTIMATES HORIZ DISTANCE TO HAVE BEEN 1/4 MI EVEN THOUGH OTHER ACFT WAS INDICATING +300 FT ON TCASII. OUR RA THEN VERBALIZED 'INCREASE CLB.' THIS OCCURRED EVEN THOUGH OUR VERT VELOCITY WAS IN THE GREEN BAND FOR OUR RA. WE ULTIMATELY CLBED TO APPROX 17800 FT MSL. WHEN CLR OF CONFLICT, WE RETURNED TO 17000 FT MSL. SINCE WE DID NOT HAVE TFC IN SIGHT, WE HAD TO FOLLOW OUR RA GUIDANCE. SINCE OTHER ACFT HAD US IN SIGHT, HE MAY HAVE DISREGARDED HIS RA GUIDANCE -- THUS DECREASING OUR VERT/HORIZ SEPARATION. I BELIEVE BOTH ACFT SHOULD HAVE EACH OTHER IN SIGHT TO DO VFR CLB/DSCNTS. SUPPLEMENTAL INFO FROM ACN 615770: IN THE FUTURE I THINK I WOULD DECLINE A VFR CLB OR DSCNT IF THE OTHER ACFT DID NOT ALSO HAVE US IN SIGHT TO AVOID A TCASII INDUCED CONFLICT LIKE THIS ONE.
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.