Narrative:

While on the climbout from iah on the wylsn one departure; we were given a clearance to climb and maintain 16;000 feet. At 16;000 feet with the autopilot engaged; I noticed on my TCAS an aircraft at our two o'clock 400 feet above. I told my first officer and ask him if he had that aircraft in sight. He said he did not. Right before inquiring with ATC we got a resolution advisory 'RA'. I 'tcs' overrode the autopilot and followed our escape guidance and we descended about 500-800 feet.while I was executing the escape maneuver I told my first officer to notify ATC and tell them that we got a RA and that we were complying and descending. After we were cleared of conflict I started the climb to 16;000 feet and I told my first officer to notify ATC that we were climbing back to our assigned altitude of 16;000 feet. I inquired about the incident with ATC and he said that he showed the traffic being at 16;500 feet and us being at 16;000 feet. Not once prior or after the incident did ATC informed us about traffic only when we inquired. That aircraft also reported having us on his TCAS 300 feet below. We continued the flight without any further incident. ATC needs to keep the required separation between airplanes in controlled airspace.

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Original NASA ASRS Text

Title: Pilot report of a NMAC with a TCAS RA in which they responded to and resolved. ATC never issued a traffic call; even though the Controller observed the traffic.

Narrative: While on the climbout from IAH on the WYLSN ONE Departure; we were given a clearance to climb and maintain 16;000 feet. At 16;000 feet with the autopilot engaged; I noticed on my TCAS an aircraft at our two o'clock 400 feet above. I told my First Officer and ask him if he had that aircraft in sight. He said he did not. Right before inquiring with ATC we got a Resolution Advisory 'RA'. I 'TCS' overrode the autopilot and followed our escape guidance and we descended about 500-800 feet.While I was executing the escape maneuver I told my First Officer to notify ATC and tell them that we got a RA and that we were complying and descending. After we were cleared of conflict I started the climb to 16;000 feet and I told my First Officer to notify ATC that we were climbing back to our assigned altitude of 16;000 feet. I inquired about the incident with ATC and he said that he showed the traffic being at 16;500 feet and us being at 16;000 feet. Not once prior or after the incident did ATC informed us about traffic only when we inquired. That aircraft also reported having us on his TCAS 300 feet below. We continued the flight without any further incident. ATC needs to keep the required separation between airplanes in controlled airspace.

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.