<< >> NASA ASRS Report 841821, July 2009

Side by side IFR departures from runways 25L and right at las simultaneously fly runway heading vice diverging courses; TCAS RA resulted.

Attributes
ACN	841821
Time
Date	200907
Local Time Of Day	1201-1800
Place
Locale Reference	LAS.Airport
State Reference	NV
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 13000 Flight Crew Type 2500
Person 2
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 220 Flight Crew Total 7500 Flight Crew Type 520
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance

Narrative:

Cleared for takeoff runway 25R and told that another jet departing simultaneously on 25L would be turning south. During climbout the other jet was abeam our aircraft separated only by runway centerline distance of 25L and 25R. The aircraft remained this distance for about a minute until turning south well upwind. The jet appeared to be on a 25L departure that did not turn south for a considerable distance upwind after takeoff. Received descend TCAS RA during this departure procedure. It appeared that when tower realized that the other jet was not turning immediately -- which was the impression they gave us -- they issued them instructions to maintain visual separation. This was a very uncomfortable situation which could have easily been worse had there been a crosswind present at the time of departure

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Original NASA ASRS Text

Title: Side by side IFR departures from Runways 25L and R at LAS simultaneously fly runway heading vice diverging courses; TCAS RA resulted.

Narrative: Cleared for takeoff Runway 25R and told that another jet departing simultaneously on 25L would be turning south. During climbout the other jet was abeam our aircraft separated only by runway centerline distance of 25L and 25R. The aircraft remained this distance for about a minute until turning south well upwind. The jet appeared to be on a 25L departure that did not turn south for a considerable distance upwind after takeoff. Received descend TCAS RA during this departure procedure. It appeared that when Tower realized that the other jet was not turning immediately -- which was the impression they gave us -- they issued them instructions to maintain visual separation. This was a very uncomfortable situation which could have easily been worse had there been a crosswind present at the time of departure

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.