<< >> NASA ASRS Report 890597, May 2010

L30 controller described conflict event when failing to note an uncoordinated aircraft and then failing to respond to that aircraft; the reporter noting poor reaction to the situation.

Attributes
ACN	890597
Time
Date	201005
Local Time Of Day	0001-0600
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 Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

Air carrier X was crossing east of the field for the right downwind arrival to runway 1L. I issued 8000' to air carrier X and scanned the arrival area and observed air carrier Y at 10000 south-southwest bound. I told air carrier X to maintain 11000' and issued traffic. Air carrier Y continued the climb. Air carrier X received an RA and asked if he should respond. After the aircraft passed air carrier X let me know he had visual. Recommendation; I reacted poorly to the situation. I didn't know what air carrier Y was doing in my airspace. With not all the information; I made a bad call. Had I known air carrier Y was climbing I could have issued a descent and turn.

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Original NASA ASRS Text

Title: L30 controller described conflict event when failing to note an uncoordinated aircraft and then failing to respond to that aircraft; the reporter noting poor reaction to the situation.

Narrative: Air Carrier X was crossing east of the field for the right downwind arrival to Runway 1L. I issued 8000' to Air Carrier X and scanned the arrival area and observed Air Carrier Y at 10000 south-southwest bound. I told Air Carrier X to maintain 11000' and issued traffic. Air Carrier Y continued the climb. Air Carrier X received an RA and asked if he should respond. After the aircraft passed Air Carrier X let me know he had visual. Recommendation; I reacted poorly to the situation. I didn't know what Air Carrier Y was doing in my airspace. With not all the information; I made a bad call. Had I known Air Carrier Y was climbing I could have issued a descent and turn.

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.