Intermittent navigation lights.

Attributes
ACN	286077
Time
Date	199410
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : eug
State Reference	OR
Altitude	msl bound lower : 10000 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : eug
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller non radar : 10 controller radar : 10
ASRS Report	286077
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action none taken : unable
Consequence	Other
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Cpr X and cpr Y (10 mi in trail) were descending into cvo airport from southeast of eug VORTAC nwbound. A primary target was swbound form 10 mi northeast of eug VORTAC. Cpr X was converging with the primary and got him in sight about 3 mi northeast of the eug VOR, altitude estimated at 8500 ft. Cpr X was at 9000 ft cpr Y was advised and slowed his descent. Cpr Y and the primary merged over the eug VORTAC. Cpr Y leveled at 10000 ft and estimated the traffic at 9500 when he got him in sight as the target crossed under him. The target had intermittent position lights. The eug tower had the target in sight and confirmed no lights at times. Cpr X said he would not have seen the traffic with no lights. Target had no transponder and never called ZSE center or eug approach.

Original NASA ASRS Text

Title: INTERMITTENT NAV LIGHTS.

Narrative: CPR X AND CPR Y (10 MI IN TRAIL) WERE DSNDING INTO CVO ARPT FROM SE OF EUG VORTAC NWBOUND. A PRIMARY TARGET WAS SWBOUND FORM 10 MI NE OF EUG VORTAC. CPR X WAS CONVERGING WITH THE PRIMARY AND GOT HIM IN SIGHT ABOUT 3 MI NE OF THE EUG VOR, ALT ESTIMATED AT 8500 FT. CPR X WAS AT 9000 FT CPR Y WAS ADVISED AND SLOWED HIS DSCNT. CPR Y AND THE PRIMARY MERGED OVER THE EUG VORTAC. CPR Y LEVELED AT 10000 FT AND ESTIMATED THE TFC AT 9500 WHEN HE GOT HIM IN SIGHT AS THE TARGET CROSSED UNDER HIM. THE TARGET HAD INTERMITTENT POS LIGHTS. THE EUG TWR HAD THE TARGET IN SIGHT AND CONFIRMED NO LIGHTS AT TIMES. CPR X SAID HE WOULD NOT HAVE SEEN THE TFC WITH NO LIGHTS. TARGET HAD NO XPONDER AND NEVER CALLED ZSE CTR OR EUG 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.