An A319 flight crew reported an airborne conflict with a light aircraft on short final at las.

Attributes
ACN	847621
Time
Date	200908
Local Time Of Day	0001-0600
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Landing
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Flight Phase	Initial Climb
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict Airborne Conflict
Miss Distance	Horizontal 500

Narrative:

During a visual approach to runway 7R at las on short final; approximately 75 to 100 ft AGL; a single engine aircraft departed runway 7L and made an immediate right turn and crossed in front of our aircraft as it climbed reducing horizontal separation to approximately 500 to 600 ft. The first officer and I were not advised by ATC that the single engine aircraft would be performing this maneuver. It was of concern to me because I felt that vertical separation minimum was compromised especially in the event that we would need to perform a go-around maneuver.

Original NASA ASRS Text

Title: An A319 flight crew reported an airborne conflict with a light aircraft on short final at LAS.

Narrative: During a visual approach to Runway 7R at LAS on short final; approximately 75 to 100 FT AGL; a single engine aircraft departed Runway 7L and made an immediate right turn and crossed in front of our aircraft as it climbed reducing horizontal separation to approximately 500 to 600 FT. The First Officer and I were not advised by ATC that the single engine aircraft would be performing this maneuver. It was of concern to me because I felt that vertical separation minimum was compromised especially in the event that we would need to perform a go-around maneuver.

Data retrieved from NASA's ASRS site as of April 2012 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.