Narrative:

Just after takeoff from runway 10C at pit we received a TA on the TCASII. It indicated another aircraft we were unaware of, climbing 800 ft above us and paralleling our course. At 2500 ft we spotted the aircraft visually. It was apparent that at our rate of climb we would hit the aircraft. We then took evasive action and turned to 060 degree heading and descended to 2000 ft MSL. It was only after we started the evasive action that we received an RA from the TCASII. Supplemental information from acn 359847: the captain initiated an evasive maneuver -- left turn and a descent back to 2000 ft (800 ft AGL). We were close enough to identify the type aircraft. If we had not performed the maneuver, I can say without a doubt, we would have been the lead story on the news. TCASII definitely saved the day. We called ATC when we arrived at our destination. The caravan had taken off before us on runway 14. Tower had initially given him runway heading then gave him a left turn to 120 degrees and turned him over to departure. We then departed on runway 10C and maintained runway heading. Winds at the surface were 130 degrees at 15 KTS and apparently more out of the south higher up. Tower didn't tell departure they had turned the caravan to 120 degrees. After completing our evasive maneuver we queried ATC about the traffic, their only response was he's on a 140 degree heading. Nothing about the fact we would have climbed through his altitude. When we were clear of the traffic we climbed back up to our assigned altitude, 5000 ft.

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Original NASA ASRS Text

Title: NMAC AVOIDED AS TCASII TA STARTS DC9 FLC EVASIVE ACTION TURN DSCNT. 2 DEP ACFT ON CONVERGING TRACKS. TA NOT GIVEN.

Narrative: JUST AFTER TKOF FROM RWY 10C AT PIT WE RECEIVED A TA ON THE TCASII. IT INDICATED ANOTHER ACFT WE WERE UNAWARE OF, CLBING 800 FT ABOVE US AND PARALLELING OUR COURSE. AT 2500 FT WE SPOTTED THE ACFT VISUALLY. IT WAS APPARENT THAT AT OUR RATE OF CLB WE WOULD HIT THE ACFT. WE THEN TOOK EVASIVE ACTION AND TURNED TO 060 DEG HDG AND DSNDED TO 2000 FT MSL. IT WAS ONLY AFTER WE STARTED THE EVASIVE ACTION THAT WE RECEIVED AN RA FROM THE TCASII. SUPPLEMENTAL INFO FROM ACN 359847: THE CAPT INITIATED AN EVASIVE MANEUVER -- L TURN AND A DSCNT BACK TO 2000 FT (800 FT AGL). WE WERE CLOSE ENOUGH TO IDENT THE TYPE ACFT. IF WE HAD NOT PERFORMED THE MANEUVER, I CAN SAY WITHOUT A DOUBT, WE WOULD HAVE BEEN THE LEAD STORY ON THE NEWS. TCASII DEFINITELY SAVED THE DAY. WE CALLED ATC WHEN WE ARRIVED AT OUR DEST. THE CARAVAN HAD TAKEN OFF BEFORE US ON RWY 14. TWR HAD INITIALLY GIVEN HIM RWY HDG THEN GAVE HIM A L TURN TO 120 DEGS AND TURNED HIM OVER TO DEP. WE THEN DEPARTED ON RWY 10C AND MAINTAINED RWY HDG. WINDS AT THE SURFACE WERE 130 DEGS AT 15 KTS AND APPARENTLY MORE OUT OF THE S HIGHER UP. TWR DIDN'T TELL DEP THEY HAD TURNED THE CARAVAN TO 120 DEGS. AFTER COMPLETING OUR EVASIVE MANEUVER WE QUERIED ATC ABOUT THE TFC, THEIR ONLY RESPONSE WAS HE'S ON A 140 DEG HDG. NOTHING ABOUT THE FACT WE WOULD HAVE CLBED THROUGH HIS ALT. WHEN WE WERE CLR OF THE TFC WE CLBED BACK UP TO OUR ASSIGNED ALT, 5000 FT.

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.