An air carrier at 3;300 ft descending on a right downwind for visual to tys runway 23R; received an ...

Narrative:

While descending to downwind to tys 23R; the first officer pointed out the known antennas in the vicinity to me. We received a obstacle warning followed by a pull up command. I started the phase one. We at 3;300 ft descending to 3;000 for the visual to [runway] 23R and as soon as I stopped the descent the warning stopped. I started my right base turn and landed uneventfully. I had slightly delayed my base turn and that is what triggered the GPWS. I should have started my base turn exactly abeam higar and this would have managed this threat properly.

Original NASA ASRS Text

Title: An Air Carrier at 3;300 FT descending on a right downwind for visual to TYS Runway 23R; received an EGPWS PULL UP command from known antennas in the descent flight path.

Narrative: While descending to downwind to TYS 23R; the First Officer pointed out the known antennas in the vicinity to me. We received a Obstacle Warning followed by a Pull Up command. I started the Phase One. We at 3;300 FT descending to 3;000 for the visual to [Runway] 23R and as soon as I stopped the descent the warning stopped. I started my right base turn and landed uneventfully. I had slightly delayed my base turn and that is what triggered the GPWS. I should have started my base turn exactly abeam HIGAR and this would have managed this threat properly.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1055088
Time
Date	201212
Local Time Of Day	0001-0600
Place
Locale Reference	TYS.Airport
State Reference	TN
Environment
Light	Night
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Inflight Event / Encounter CFTT / CFIT

An air carrier at 3;300 ft descending on a right downwind for visual to tys runway 23R; received an egpws pull up command from known antennas in the descent flight path.