Near midair collision between an embraer, EMB120, descending for landing and an unknown private aircraft operating from a nearby uncontrolled airport. The EMB120 flight crew took evasive action in response to a TCASII alert.

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Attributes
ACN	372183
Time
Date	199706
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ile
State Reference	TX
Altitude	agl bound lower : 1500 agl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : grk tower : roc
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 135
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	other other : other pilot : atp
Experience	flight time last 90 days : 250 flight time total : 9800 flight time type : 5000
ASRS Report	372183
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac other anomaly other
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While approaching ile we received a TCASII alert and warning. We could not visually acquire the other aircraft so we took evasive action. We saw and avoided the other aircraft by 200 ft vertically and 500 ft horizontally. This is an uncontrolled field that is served by several regional airlines. The problem was compounded because grey approach had told us to monitor unicom and stopped giving us radar advisories. Although we were still listening to him, he didn't warn us of the other aircraft because he didn't think we were on his frequency anymore. Afterwards he told us he didn't know we had 2 radios and could monitor him so he didn't try to warn us. This airspace/airport is a midair waiting to happen and this could possibly be prevented if the people at grey approach were a little more 'aware.'

Original NASA ASRS Text

Title: NMAC BTWN AN EMBRAER, EMB120, DSNDING FOR LNDG AND AN UNKNOWN PVT ACFT OPERATING FROM A NEARBY UNCTLED ARPT. THE EMB120 FLC TOOK EVASIVE ACTION IN RESPONSE TO A TCASII ALERT.

Narrative: WHILE APCHING ILE WE RECEIVED A TCASII ALERT AND WARNING. WE COULD NOT VISUALLY ACQUIRE THE OTHER ACFT SO WE TOOK EVASIVE ACTION. WE SAW AND AVOIDED THE OTHER ACFT BY 200 FT VERTLY AND 500 FT HORIZLY. THIS IS AN UNCTLED FIELD THAT IS SERVED BY SEVERAL REGIONAL AIRLINES. THE PROB WAS COMPOUNDED BECAUSE GREY APCH HAD TOLD US TO MONITOR UNICOM AND STOPPED GIVING US RADAR ADVISORIES. ALTHOUGH WE WERE STILL LISTENING TO HIM, HE DIDN'T WARN US OF THE OTHER ACFT BECAUSE HE DIDN'T THINK WE WERE ON HIS FREQ ANYMORE. AFTERWARDS HE TOLD US HE DIDN'T KNOW WE HAD 2 RADIOS AND COULD MONITOR HIM SO HE DIDN'T TRY TO WARN US. THIS AIRSPACE/ARPT IS A MIDAIR WAITING TO HAPPEN AND THIS COULD POSSIBLY BE PREVENTED IF THE PEOPLE AT GREY APCH WERE A LITTLE MORE 'AWARE.'

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.