Large transport near midair collision sna.

Attributes
ACN	427761
Time
Date	199902
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sli
State Reference	CA
Altitude	msl bound lower : 4300 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Flight Phase	descent other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	controller non radar : 15 controller radar : 15 flight time last 90 days : 100 flight time total : 8800 flight time type : 180
ASRS Report	427761
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 220 flight time total : 9000 flight time type : 5500
ASRS Report	427762
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200

Narrative:

Sna tandy 3 arrival approaching albas intersection 5000 ft MSL 200 KTS. Socal calls traffic 1 O'clock position 7 mi 5500 ft MSL, we have traffic on TCASII and also visually. At 3 mi of horizontal separation the target starts a slow descent. At 2 mi we receive an RA to descend. Still having traffic visually we also descend. At 1 mi we receive an RA 'increase descent.' we comply. Traffic white and blue C182 doesn't alter course or descent and passes over us. We then level off at 4300 ft MSL and report to socal. We have had numerous such sits both during the arrival phase as well as the departure phase at sna. All arrs commercial from the north go to sxc and come over the shoreline at 5000 ft MSL. Departures vary from 2500 ft to 5000 ft MSL dependent on weight, thrust cutback procedure, and pilot skills. If the GA public can be more informed of the sna corridor along the shoreline they may choose to stay clear. Or maybe the GA aircraft should be prohibited from the area unless 2-WAY radio contact is maintained. Another note: socal doesn't fill out any paperwork on these sits because 'there are so many of them.'

Original NASA ASRS Text

Title: LGT NMAC SNA.

Narrative: SNA TANDY 3 ARR APCHING ALBAS INTXN 5000 FT MSL 200 KTS. SOCAL CALLS TFC 1 O'CLOCK POS 7 MI 5500 FT MSL, WE HAVE TFC ON TCASII AND ALSO VISUALLY. AT 3 MI OF HORIZ SEPARATION THE TARGET STARTS A SLOW DSCNT. AT 2 MI WE RECEIVE AN RA TO DSND. STILL HAVING TFC VISUALLY WE ALSO DSND. AT 1 MI WE RECEIVE AN RA 'INCREASE DSCNT.' WE COMPLY. TFC WHITE AND BLUE C182 DOESN'T ALTER COURSE OR DSCNT AND PASSES OVER US. WE THEN LEVEL OFF AT 4300 FT MSL AND RPT TO SOCAL. WE HAVE HAD NUMEROUS SUCH SITS BOTH DURING THE ARR PHASE AS WELL AS THE DEP PHASE AT SNA. ALL ARRS COMMERCIAL FROM THE N GO TO SXC AND COME OVER THE SHORELINE AT 5000 FT MSL. DEPS VARY FROM 2500 FT TO 5000 FT MSL DEPENDENT ON WT, THRUST CUTBACK PROC, AND PLT SKILLS. IF THE GA PUBLIC CAN BE MORE INFORMED OF THE SNA CORRIDOR ALONG THE SHORELINE THEY MAY CHOOSE TO STAY CLR. OR MAYBE THE GA ACFT SHOULD BE PROHIBITED FROM THE AREA UNLESS 2-WAY RADIO CONTACT IS MAINTAINED. ANOTHER NOTE: SOCAL DOESN'T FILL OUT ANY PAPERWORK ON THESE SITS BECAUSE 'THERE ARE SO MANY OF THEM.'

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.