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Sct controller described a TCAS RA event between a bur air carrier arrival at 8000 and an unknown and unobserved VFR aircraft that checked in at 7000; the reporter recommends improved radar coverage in the subject area.
| Attributes | |
| ACN | 886736 |
| Time | |
| Date | 201005 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
An air carrier (aircraft X) was on the arrival to bur level at 8000 ft. A VFR aircraft checks in saying they have aircraft X in sight; however the call sign and altitude did not match the only VFR I'm expecting; nor are there any untracked VFR targets displayed on the radar. Several seconds later aircraft X says they is responding to an RA and is climbing. I search the area and still do not observe traffic. As I respond to aircraft X a VFR target appears just off his right 300 ft below him. This is an area that has very poor radar coverage normally below 7500 ft. Except for the fact that a 'stack' had been approved between aircraft X and a GA below him at 7000 ft; aircraft X would have been issued a left turn and decent to 6000 ft quite possibly putting the aircraft in even closer proximity. Better radar coverage and or procedures in this area of limited radar coverage.
Original NASA ASRS Text
Title: SCT Controller described a TCAS RA event between a BUR air carrier arrival at 8000 and an unknown and unobserved VFR aircraft that checked in at 7000; the reporter recommends improved RADAR coverage in the subject area.
Narrative: An Air Carrier (Aircraft X) was on the arrival to BUR level at 8000 FT. A VFR aircraft checks in saying they have Aircraft X in sight; however the call sign and altitude did not match the only VFR I'm expecting; nor are there any untracked VFR targets displayed on the RADAR. Several seconds later Aircraft X says they is responding to an RA and is climbing. I search the area and still do not observe traffic. As I respond to Aircraft X a VFR target appears just off his right 300 FT below him. This is an area that has very poor RADAR coverage normally below 7500 FT. Except for the fact that a 'stack' had been approved between Aircraft X and a GA below him at 7000 FT; Aircraft X would have been issued a left turn and decent to 6000 FT quite possibly putting the aircraft in even closer proximity. Better RADAR coverage and or procedures in this area of limited radar coverage.
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.