Air carrier captain reported a TCAS RA departing cos caused by a GA aircraft that had departed just ...

Attributes
ACN	1468089
Time
Date	201707
Local Time Of Day	0601-1200
Place
Locale Reference	COS.Airport
State Reference	CO
Environment
Light	Daylight
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Climb
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

Narrative:

On takeoff from cos we were delayed due to several training aircraft in the pattern. Shortly after takeoff from 35R tower said there was an aircraft in front of us and switched us to departure. Departure then informs us that there is traffic in front of us and turning to a 360 degree heading. We did not have the aircraft in sight. I mentioned to the first officer; who was flying; that the aircraft was not in sight though showing at our altitude as we climbed. The TCAS showed 100 ft below us and slightly left when we received the RA to climb. The first officer disconnected the autopilot to comply with the RA.ATC launched us into single engine slower traffic which we overtook quickly on takeoff. ATC made no effort to separate converging aircraft. Keep smaller single engine aircraft out of our departure path.

Original NASA ASRS Text

Title: Air carrier Captain reported a TCAS RA departing COS caused by a GA aircraft that had departed just before. COS Tower was controlling both aircraft initially.

Narrative: On takeoff from COS we were delayed due to several training aircraft in the pattern. Shortly after takeoff from 35R tower said there was an aircraft in front of us and switched us to departure. Departure then informs us that there is traffic in front of us and turning to a 360 degree heading. We did not have the aircraft in sight. I mentioned to the First Officer; who was flying; that the aircraft was not in sight though showing at our altitude as we climbed. The TCAS showed 100 ft below us and slightly left when we received the RA to climb. The FO disconnected the autopilot to comply with the RA.ATC launched us into single engine slower traffic which we overtook quickly on takeoff. ATC made no effort to separate converging aircraft. Keep smaller single engine aircraft out of our departure path.

Data retrieved from NASA's ASRS site 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.

Air carrier captain reported a TCAS RA departing cos caused by a GA aircraft that had departed just before. Cos tower was controlling both aircraft initially.