Controller claims that VFR aircraft off adjacent airport had a conflict with an IFR arrival.

Attributes
ACN	254489
Time
Date	199310
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bfl
State Reference	CA
Altitude	msl bound lower : 2500 msl bound upper : 3300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bfl
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	descent : approach descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : takeoff
Route In Use	departure other
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 7
ASRS Report	254489
Person 2
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 800
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other
Situations
Airport	other physical facility

Narrative:

L45 is 7 mi sse of bfl. L45 hosts several experimental aircraft fly-INS. Runway 34 departure course crosses bfl runway 30 arrival course inside bfl's class D airspace. I cleared air carrier X, an small transport, for ILS runway 30R approach to bfl. Air carrier X was outside the LOM descending on the GS and requesting multiple approachs on FAA chkride. I observed an aircraft airborne off L45 runway 34 making a right downwind departure, transponder/mode C on. Bfl ILS course is aligned with ehf VORTAC V-197 pmd. I issued traffic to air carrier X, then a safety alert to remain at or above present altitude. The unknown aircraft was 12 O'clock, 2 mi, opposite direction, 2000 MSL climbing. The unknown aircraft merged, altitude indicated 2500 MSL climbing. Air carrier X indicated 3300 MSL. Air carrier X never saw aircraft and crossed the LOM above GS. The unknown aircraft never called for radar service. If the unknown aircraft did not have mode C or didn't turn transponder on, the margin of safety would have been reduced. Solutions: 1) give bfl class D extension to include approach. 2)put up sign at L45 'no right turnout runway 34!' 3) publish in airport/facility directory. Note: 1) over 5 yrs of NASA reports on similar incidents. I see no improvement or pilot education. 2) niley OM is used for navigation by L45 aircraft.

Original NASA ASRS Text

Title: CTLR CLAIMS THAT VFR ACFT OFF ADJACENT ARPT HAD A CONFLICT WITH AN IFR ARR.

Narrative: L45 IS 7 MI SSE OF BFL. L45 HOSTS SEVERAL EXPERIMENTAL ACFT FLY-INS. RWY 34 DEP COURSE CROSSES BFL RWY 30 ARR COURSE INSIDE BFL'S CLASS D AIRSPACE. I CLRED ACR X, AN SMT, FOR ILS RWY 30R APCH TO BFL. ACR X WAS OUTSIDE THE LOM DSNDING ON THE GS AND REQUESTING MULTIPLE APCHS ON FAA CHKRIDE. I OBSERVED AN ACFT AIRBORNE OFF L45 RWY 34 MAKING A R DOWNWIND DEP, XPONDER/MODE C ON. BFL ILS COURSE IS ALIGNED WITH EHF VORTAC V-197 PMD. I ISSUED TFC TO ACR X, THEN A SAFETY ALERT TO REMAIN AT OR ABOVE PRESENT ALT. THE UNKNOWN ACFT WAS 12 O'CLOCK, 2 MI, OPPOSITE DIRECTION, 2000 MSL CLBING. THE UNKNOWN ACFT MERGED, ALT INDICATED 2500 MSL CLBING. ACR X INDICATED 3300 MSL. ACR X NEVER SAW ACFT AND CROSSED THE LOM ABOVE GS. THE UNKNOWN ACFT NEVER CALLED FOR RADAR SVC. IF THE UNKNOWN ACFT DID NOT HAVE MODE C OR DIDN'T TURN XPONDER ON, THE MARGIN OF SAFETY WOULD HAVE BEEN REDUCED. SOLUTIONS: 1) GIVE BFL CLASS D EXTENSION TO INCLUDE APCH. 2)PUT UP SIGN AT L45 'NO R TURNOUT RWY 34!' 3) PUBLISH IN ARPT/FACILITY DIRECTORY. NOTE: 1) OVER 5 YRS OF NASA RPTS ON SIMILAR INCIDENTS. I SEE NO IMPROVEMENT OR PLT EDUCATION. 2) NILEY OM IS USED FOR NAV BY L45 ACFT.

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.