Corp aircraft has near midair collision with small transport while on VOR approach.

Attributes
ACN	183864
Time
Date	199107
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lby airport : hbg
State Reference	MS
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu
Operator	general aviation : corporate
Make Model Name	Light Transport
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 9500 flight time type : 30
ASRS Report	183864
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 400 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Arriving at lby VOR for VOR approach to hbg airport. Copilot calls traffic at 3 O'clock and starts to take evasive action. No action was taken. An small transport passes behind and below our aircraft. The small transport had us in his 12 O'clock position. Houston center terminates radar service about this same time because they were unable to maintain radar with us. The traffic was not observed by controller or no communication established. Since no tail # was known no report was filed with FAA. For conditions flying 3000 ft by traffic, would also be legal. Also contributing was min VFR conditions at flight altitude.

Original NASA ASRS Text

Title: CORP ACFT HAS NMAC WITH SMT WHILE ON VOR APCH.

Narrative: ARRIVING AT LBY VOR FOR VOR APCH TO HBG ARPT. COPLT CALLS TFC AT 3 O'CLOCK AND STARTS TO TAKE EVASIVE ACTION. NO ACTION WAS TAKEN. AN SMT PASSES BEHIND AND BELOW OUR ACFT. THE SMT HAD US IN HIS 12 O'CLOCK POS. HOUSTON CENTER TERMINATES RADAR SERVICE ABOUT THIS SAME TIME BECAUSE THEY WERE UNABLE TO MAINTAIN RADAR WITH US. THE TFC WAS NOT OBSERVED BY CTLR OR NO COM ESTABLISHED. SINCE NO TAIL # WAS KNOWN NO RPT WAS FILED WITH FAA. FOR CONDITIONS FLYING 3000 FT BY TFC, WOULD ALSO BE LEGAL. ALSO CONTRIBUTING WAS MIN VFR CONDITIONS AT FLT ALT.

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.