2 aircraft at the same altitude and direction of flight came very close to colliding.

Attributes
ACN	156401
Time
Date	199009
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ehf
State Reference	CA
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bfl
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 2
ASRS Report	156401
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Small aircraft X VFR/75 over highway 99, 30 mi southeast, leaving bfl airspace. Pilot advised near midair collision 50' small aircraft Y same altitude, same direction. We just terminated. Other aircraft (small aircraft Y) primary target only, following freeway. Lots of aircraft on scope (holiday). Duplicate beacons, false targets, no mode C on 1 of our radar channels. Saw a VFR beacon, no mode C 35 mi southeast, on the small aircraft Y after near midair collision. Recommend terminate flight following/radar service sooner due to limitations of radar.

Original NASA ASRS Text

Title: 2 ACFT AT THE SAME ALT AND DIRECTION OF FLT CAME VERY CLOSE TO COLLIDING.

Narrative: SMA X VFR/75 OVER HWY 99, 30 MI SE, LEAVING BFL AIRSPACE. PLT ADVISED NMAC 50' SMA Y SAME ALT, SAME DIRECTION. WE JUST TERMINATED. OTHER ACFT (SMA Y) PRIMARY TARGET ONLY, FOLLOWING FREEWAY. LOTS OF ACFT ON SCOPE (HOLIDAY). DUPLICATE BEACONS, FALSE TARGETS, NO MODE C ON 1 OF OUR RADAR CHANNELS. SAW A VFR BEACON, NO MODE C 35 MI SE, ON THE SMA Y AFTER NMAC. RECOMMEND TERMINATE FLT FOLLOWING/RADAR SVC SOONER DUE TO LIMITATIONS OF RADAR.

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.