A B757 had an aircraft cross in front of it for the parallel runway at las.

Attributes
ACN	433181
Time
Date	199903
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : las.airport
State Reference	NV
Altitude	agl single value : 700
Environment
Flight Conditions	VMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	tower : las.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : las.tower
Make Model Name	Twin Otter DHC-6
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 19000 flight time type : 450
ASRS Report	433181
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 3500
ASRS Report	433423
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 700 vertical : 0
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

The controller announced the wind of the ground to be 200 degrees at 40 KTS. We decided to use runway 19L, asked for vectors. After reporting field in sight, we were cleared visual runway 19L. Tower then pointed out twin otter traffic. We said, 'we were looking.' when we saw the twin otter he was 11-12 O'clock position and 1-2 mi ahead, crossing over to runway 19R. Controller asked, you do see the twin otter don't you? We said yes, while we s-turned to the left to gain more distance from him. The controller never confirmed that we had the twin otter in sight until we were very close. Our TCASII was MEL'ed inoperative. Had our TCASII worked we would have noticed the conflict earlier. Controller never told us the twin otter would cross in front of us to land on runway 19R. The wind was gusting to 40 KTS which made the ground speed of the otter much slower than it would usually be.

Original NASA ASRS Text

Title: A B757 HAD AN ACFT CROSS IN FRONT OF IT FOR THE PARALLEL RWY AT LAS.

Narrative: THE CTLR ANNOUNCED THE WIND OF THE GND TO BE 200 DEGS AT 40 KTS. WE DECIDED TO USE RWY 19L, ASKED FOR VECTORS. AFTER RPTING FIELD IN SIGHT, WE WERE CLRED VISUAL RWY 19L. TWR THEN POINTED OUT TWIN OTTER TFC. WE SAID, 'WE WERE LOOKING.' WHEN WE SAW THE TWIN OTTER HE WAS 11-12 O'CLOCK POS AND 1-2 MI AHEAD, XING OVER TO RWY 19R. CTLR ASKED, YOU DO SEE THE TWIN OTTER DON'T YOU? WE SAID YES, WHILE WE S-TURNED TO THE L TO GAIN MORE DISTANCE FROM HIM. THE CTLR NEVER CONFIRMED THAT WE HAD THE TWIN OTTER IN SIGHT UNTIL WE WERE VERY CLOSE. OUR TCASII WAS MEL'ED INOP. HAD OUR TCASII WORKED WE WOULD HAVE NOTICED THE CONFLICT EARLIER. CTLR NEVER TOLD US THE TWIN OTTER WOULD CROSS IN FRONT OF US TO LAND ON RWY 19R. THE WIND WAS GUSTING TO 40 KTS WHICH MADE THE GND SPD OF THE OTTER MUCH SLOWER THAN IT WOULD USUALLY BE.

Data retrieved from NASA's ASRS site as of July 2007 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.