<< >> NASA ASRS Report 332048, April 1996

Operational error between air carrier X and aircraft Y with 400 ft separation when air carrier X stopped climb after TCASII RA.

Attributes
ACN	332048
Time
Date	199604
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 6200 msl bound upper : 6600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : las tower : las
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 4 controller non radar : 1 controller radar : 18
ASRS Report	332048
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : required legal separation non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was climbing through approximately 5700 ft when he reported receiving an 'RA.' air carrier X stopped his climb at 6200 ft MSL and passed under a traffic watch cessna, level at 6600 ft MSL. After the 2 aircraft passed air carrier X descended to 6000 ft MSL. This error occurred due to my failure to pay close attention to the traffic situation during a slow time of day.

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Original NASA ASRS Text

Title: OPERROR BTWN ACR X AND ACFT Y WITH 400 FT SEPARATION WHEN ACR X STOPPED CLB AFTER TCASII RA.

Narrative: ACR X WAS CLBING THROUGH APPROX 5700 FT WHEN HE RPTED RECEIVING AN 'RA.' ACR X STOPPED HIS CLB AT 6200 FT MSL AND PASSED UNDER A TFC WATCH CESSNA, LEVEL AT 6600 FT MSL. AFTER THE 2 ACFT PASSED ACR X DSNDED TO 6000 FT MSL. THIS ERROR OCCURRED DUE TO MY FAILURE TO PAY CLOSE ATTN TO THE TFC SIT DURING A SLOW TIME OF DAY.

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.