<< >> NASA ASRS Report 412750, August 1998

A descending air carrier B737 handed off to elp approach control responded to a TCASII RA to avoid an unidented VFR aircraft opposite direction.

Attributes
ACN	412750
Time
Date	199808
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : elp
State Reference	TX
Altitude	msl bound lower : 11700 msl bound upper : 11700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : elp
Operator	common carrier : air carrier
Make Model Name	B737-500
Navigation In Use	Other Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 1
ASRS Report	412750
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Unidented VFR overflt (nga Y) on V198 east of elp eastbound and air carrier X descending to land at elp opposite direction. ZAB assigned descent to 10000 ft and did not issue traffic on the VFR overflt. Air carrier X checked on my frequency reporting in a turn in response to a TCASII RA. The event occurred on the boundary between ZAB and elp approach.

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Original NASA ASRS Text

Title: A DSNDING ACR B737 HANDED OFF TO ELP APCH CTL RESPONDED TO A TCASII RA TO AVOID AN UNIDENTED VFR ACFT OPPOSITE DIRECTION.

Narrative: UNIDENTED VFR OVERFLT (NGA Y) ON V198 E OF ELP EBOUND AND ACR X DSNDING TO LAND AT ELP OPPOSITE DIRECTION. ZAB ASSIGNED DSCNT TO 10000 FT AND DID NOT ISSUE TFC ON THE VFR OVERFLT. ACR X CHKED ON MY FREQ RPTING IN A TURN IN RESPONSE TO A TCASII RA. THE EVENT OCCURRED ON THE BOUNDARY BTWN ZAB AND ELP APCH.

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.