Narrative:

An F22 with no transponder primary only radar identified. Lost primary target just south of arrival corridor for lax. I told aircraft 'radar contact lost'; and had aircraft track inbound on pmd 100R and report 100 miles out. I then asked the aircraft if there was anyway to enhance radar detection as the aircraft is a stealth fighter. Pilot advised only way that could be done would lose the aircraft radios. I didn't think that was a good idea so I didn't do that. Asked aircraft position pilot responded pmd 100/107. I asked pilot to report 75 miles out as this would be clear of my arrivals which were stopped above them at FL290. I asked for an overhead which was provided. I got another report at 78 miles and my arrival aircraft reported and F-22 off to the right of them. I instructed the F22 to join the pmd 70 DME arc and to arc north to the pmd 075R and track inbound on that radial. I did this to get aircraft to the north for sector 37 inbound traffic to lax also. Overhead said that information was passed to sector 37 I then asked the F22 if they were established on the arc. Pilot said I gave it to them a bit late but that he was on the 69 DME arc. Sector 37 then asked to talk to the F22 so I switched the aircraft to their frequency. I was so far behind at this point I took awhile to catch back up. I had approx 10-12 aircraft I was working both climbing and descending. It was very stressful situation. It is unsafe situation when the aircraft is stealth or maybe our radar coverage wasn't very good. Recommendation; not take primary only aircraft in class a air especially if they are stealth.

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Original NASA ASRS Text

Title: ZLA reporters described a possible loss of separation event involving a stealth aircraft and LAX inbound traffic; the reporters noting the complexity/confusion when trying to work a stealth aircraft in Class A airspace lacking reliable primary RADAR information.

Narrative: An F22 with no transponder primary only RADAR identified. Lost primary target just south of arrival corridor for LAX. I told aircraft 'RADAR contact lost'; and had aircraft track inbound on PMD 100R and report 100 miles out. I then asked the aircraft if there was anyway to enhance RADAR detection as the aircraft is a stealth fighter. Pilot advised only way that could be done would lose the aircraft radios. I didn't think that was a good idea so I didn't do that. Asked aircraft position pilot responded PMD 100/107. I asked pilot to report 75 miles out as this would be clear of my arrivals which were stopped above them at FL290. I asked for an overhead which was provided. I got another report at 78 miles and my arrival aircraft reported and F-22 off to the right of them. I instructed the F22 to join the PMD 70 DME ARC and to arc north to the PMD 075R and track inbound on that radial. I did this to get aircraft to the north for Sector 37 inbound traffic to LAX also. Overhead said that information was passed to Sector 37 I then asked the F22 if they were established on the arc. Pilot said I gave it to them a bit late but that he was on the 69 DME ARC. Sector 37 then asked to talk to the F22 so I switched the aircraft to their frequency. I was so far behind at this point I took awhile to catch back up. I had approx 10-12 aircraft I was working both climbing and descending. It was very stressful situation. It is unsafe situation when the aircraft is stealth or maybe our RADAR coverage wasn't very good. Recommendation; not take primary only aircraft in Class A air especially if they are stealth.

Data retrieved from NASA's ASRS site as of April 2012 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.