A320 captain reported a TCAS RA while turning final on a visual approach to runway 19R las.

Attributes
ACN	1506681
Time
Date	201712
Local Time Of Day	1201-1800
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Helicopter
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 150 Flight Crew Type 5200
Events
Anomaly	Conflict NMAC
Miss Distance	Vertical 400

Narrative:

We were cleared by approach for a visual approach and instructed to maintain heading 270 and 3500 ft until intercepting final. We switched to tower and were informed of a helicopter 1000 ft right below us. We did not have visual contact. Tower instructed us to expedite our turn to final ('start your turn now direct to the numbers'). When intercepting final; leaving 3500 ft as instructed; we had a RA without previous TA. The traffic that was 1000 ft below; was now 400 ft below. We leveled off responding to the RA; maintained 3500 ft until clear of conflict and continued the approach.

Original NASA ASRS Text

Title: A320 Captain reported a TCAS RA while turning final on a visual approach to Runway 19R LAS.

Narrative: We were cleared by Approach for a Visual Approach and instructed to maintain heading 270 and 3500 ft until intercepting final. We switched to Tower and were informed of a helicopter 1000 ft right below us. We did not have visual contact. Tower instructed us to expedite our turn to final ('start your turn now direct to the numbers'). When intercepting final; leaving 3500 ft as instructed; we had a RA without previous TA. The traffic that was 1000 ft below; was now 400 ft below. We leveled off responding to the RA; maintained 3500 ft until clear of conflict and continued the approach.

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.