 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Dhc-8 flight crew descend in response to TCASII RA during arrival SID due to a B737 climbing through their altitude.
| Attributes | |
| ACN | 539057 |
| Time | |
| Date | 200202 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : majic |
| State Reference | NC |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : gso.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-8 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : majic |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : gso.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 280 flight time total : 4700 flight time type : 750 |
| ASRS Report | 539057 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 4000 vertical : 0 |
| Supplementary | |
| Problem Areas | Weather ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
At cruise at 12000 ft, on the majic 9 arrival into clt, we were advised of a B737 climbing to 10000 ft by gso approach. The B737 was to our right (north) and heading south. We advised gso approach that we did not have the traffic in sight, as there was an undercast below us. We entered IMC, and shortly after this we received a TA/RA from our TCASII. Looking down at the target, it was 200 ft below us, just off our right rear and climbing. By the time the target traffic was at our altitude, it was at its closest to our aircraft and still climbing. The RA told us to 'descend,' so the captain initiated a descent and told me to advise gso. I did so, and gso told us that the conflict aircraft was given the climb and had us in sight. Neither the captain nor I ever heard the B737's climb clearance. Nor did we hear the B737 report us in sight. Neither of us understood how the B737 crew could have us in sight when we clearly were in IMC. We both estimate that the B737 passed about 1 mi behind us. This is too close without further advisement from ATC. The TA/RA caught us both by surprise and we acted accordingly to protocol and safety.
Original NASA ASRS Text
Title: DHC-8 FLC DSND IN RESPONSE TO TCASII RA DURING ARR SID DUE TO A B737 CLBING THROUGH THEIR ALT.
Narrative: AT CRUISE AT 12000 FT, ON THE MAJIC 9 ARR INTO CLT, WE WERE ADVISED OF A B737 CLBING TO 10000 FT BY GSO APCH. THE B737 WAS TO OUR R (N) AND HDG S. WE ADVISED GSO APCH THAT WE DID NOT HAVE THE TFC IN SIGHT, AS THERE WAS AN UNDERCAST BELOW US. WE ENTERED IMC, AND SHORTLY AFTER THIS WE RECEIVED A TA/RA FROM OUR TCASII. LOOKING DOWN AT THE TARGET, IT WAS 200 FT BELOW US, JUST OFF OUR R REAR AND CLBING. BY THE TIME THE TARGET TFC WAS AT OUR ALT, IT WAS AT ITS CLOSEST TO OUR ACFT AND STILL CLBING. THE RA TOLD US TO 'DSND,' SO THE CAPT INITIATED A DSCNT AND TOLD ME TO ADVISE GSO. I DID SO, AND GSO TOLD US THAT THE CONFLICT ACFT WAS GIVEN THE CLB AND HAD US IN SIGHT. NEITHER THE CAPT NOR I EVER HEARD THE B737'S CLB CLRNC. NOR DID WE HEAR THE B737 RPT US IN SIGHT. NEITHER OF US UNDERSTOOD HOW THE B737 CREW COULD HAVE US IN SIGHT WHEN WE CLRLY WERE IN IMC. WE BOTH ESTIMATE THAT THE B737 PASSED ABOUT 1 MI BEHIND US. THIS IS TOO CLOSE WITHOUT FURTHER ADVISEMENT FROM ATC. THE TA/RA CAUGHT US BOTH BY SURPRISE AND WE ACTED ACCORDINGLY TO PROTOCOL AND SAFETY.
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.