|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : grr.airport|
|Altitude||msl single value : 11000|
|Controlling Facilities||tracon : grr.tracon|
|Operator||common carrier : air carrier|
|Make Model Name||Regional Jet 200 ER&LR|
|Operating Under FAR Part||Part 121|
|Flight Phase||descent : intermediate altitude|
|Make Model Name||Any Unknown or Unlisted Aircraft Manufacturer|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Experience||flight time last 90 days : 200|
flight time total : 6000
flight time type : 3500
|Affiliation||government : faa|
|Function||controller : approach|
|Anomaly||conflict : airborne less severe|
|Independent Detector||atc equipment other atc equipment : radar|
aircraft equipment : tcas
other flight crewa
|Resolutory Action||controller : issued new clearance|
flight crew : took precautionary avoidance action
ATC Human Performance
Flight Crew Human Performance
Approximately 10-15 NM ssw of grr at 11000 ft MSL; ATC advised us that an aircraft was at our 1-2 O'clock position at 8500 ft unverified. We confirmed that information with our TCAS and it was accurate. We then slowed our descent to avoid a conflict. The other aircraft was steady state of 8500 ft. When the other aircraft was within approximately 1 NM; the other aircraft initiated a climb. So to avoid a conflict; we requested a left turn and a climb; which was approved by ATC. When we were in the turn we noticed that the other aircraft not only was climbing; but was also now following our flight path. After we initiated the climb we got a TCAS caution message briefly. After some vectors from ATC the flight continued uneventfully.
Original NASA ASRS Text
Title: CRJ200 FLT CREW REPORTS MOMENTARY TCAS TRAFFIC ALERT 10 NM SOUTH OF GRR AT 11000 FEET WHERE THE INTRUDER ACFT APPEARS TO CLIMB AND TURN TOWARDS THE REPORTER.
Narrative: APPROX 10-15 NM SSW OF GRR AT 11000 FT MSL; ATC ADVISED US THAT AN ACFT WAS AT OUR 1-2 O'CLOCK POS AT 8500 FT UNVERIFIED. WE CONFIRMED THAT INFO WITH OUR TCAS AND IT WAS ACCURATE. WE THEN SLOWED OUR DSCNT TO AVOID A CONFLICT. THE OTHER ACFT WAS STEADY STATE OF 8500 FT. WHEN THE OTHER ACFT WAS WITHIN APPROX 1 NM; THE OTHER ACFT INITIATED A CLB. SO TO AVOID A CONFLICT; WE REQUESTED A L TURN AND A CLB; WHICH WAS APPROVED BY ATC. WHEN WE WERE IN THE TURN WE NOTICED THAT THE OTHER ACFT NOT ONLY WAS CLBING; BUT WAS ALSO NOW FOLLOWING OUR FLT PATH. AFTER WE INITIATED THE CLB WE GOT A TCAS CAUTION MESSAGE BRIEFLY. AFTER SOME VECTORS FROM ATC THE FLT CONTINUED UNEVENTFULLY.
Data retrieved from NASA's ASRS site as of January 2009 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.