Narrative:

During climb out, instructions were received from ATC to climb to 9000 ft and to maintain visual separation from a dehaviland dash 8 that we were overtaking. We complied, and as we overtook and passed above the dash 8, the flight crew reported to ATC that they were receiving a TCASII advisory and would have to take evasive action if it continued. ATC advised them that they were being overtaken and that the aircraft had them in sight and was maintaining visual separation. The TCASII advisory apparently continued and the flight crew of the dash 8 became somewhat agitated and asked for a phone number to call and discuss the situation upon landing. I also copied the phone number and later phoned the supervisor of charlotte TRACON. He indicated that we had acted properly so far as he was concerned and that he had reviewed the occurrence with the controller. Although we believed that our climb was within regulations, I still find the situation disturbing. In the future, I plan to ask for a revised heading or altitude when it appears that my flight will pass close enough to cause a TCASII alert, especially in sits when the position of the 2 aircraft will make visual identify difficult for one of them.

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Original NASA ASRS Text

Title: BE-1900 FLT CREW RELAYS CONCERN WITH VISUAL SEPARATION APPLICATION DURING CLBOUT FROM CLT ARPT.

Narrative: DURING CLBOUT, INSTRUCTIONS WERE RECEIVED FROM ATC TO CLB TO 9000 FT AND TO MAINTAIN VISUAL SEPARATION FROM A DEHAVILAND DASH 8 THAT WE WERE OVERTAKING. WE COMPLIED, AND AS WE OVERTOOK AND PASSED ABOVE THE DASH 8, THE FLT CREW RPTED TO ATC THAT THEY WERE RECEIVING A TCASII ADVISORY AND WOULD HAVE TO TAKE EVASIVE ACTION IF IT CONTINUED. ATC ADVISED THEM THAT THEY WERE BEING OVERTAKEN AND THAT THE ACFT HAD THEM IN SIGHT AND WAS MAINTAINING VISUAL SEPARATION. THE TCASII ADVISORY APPARENTLY CONTINUED AND THE FLT CREW OF THE DASH 8 BECAME SOMEWHAT AGITATED AND ASKED FOR A PHONE NUMBER TO CALL AND DISCUSS THE SIT UPON LNDG. I ALSO COPIED THE PHONE NUMBER AND LATER PHONED THE SUPVR OF CHARLOTTE TRACON. HE INDICATED THAT WE HAD ACTED PROPERLY SO FAR AS HE WAS CONCERNED AND THAT HE HAD REVIEWED THE OCCURRENCE WITH THE CTLR. ALTHOUGH WE BELIEVED THAT OUR CLB WAS WITHIN REGS, I STILL FIND THE SIT DISTURBING. IN THE FUTURE, I PLAN TO ASK FOR A REVISED HEADING OR ALT WHEN IT APPEARS THAT MY FLT WILL PASS CLOSE ENOUGH TO CAUSE A TCASII ALERT, ESPECIALLY IN SITS WHEN THE POS OF THE 2 ACFT WILL MAKE VISUAL IDENT DIFFICULT FOR ONE OF THEM.

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.