Close proximity air carrier-medium large transport GA-small aircraft in traffic pattern at sna.

Attributes
ACN	150855
Time
Date	199007
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sma airport : sna
State Reference	CA
Altitude	agl bound lower : 150 agl bound upper : 150
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : sna
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	landing : go around other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 2400 flight time type : 500
ASRS Report	150855
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 20000 flight time type : 3000
ASRS Report	150856
Events
Anomaly	conflict : nmac non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 250 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Making a visibility approach to runway 19R, (following the ILS localizer and G/south), a small small aircraft Y was making a visibility approach to runway 19L. Small aircraft Y overshot the runway and was about halfway between the runways still angling toward our runway, when we initiated our missed approach. The VFR pattern at airports with closely spaced runways should be altered to allow a 45 degree maximum intercept to final.

Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG GA-SMA IN TRAFFIC PATTERN AT SNA.

Narrative: MAKING A VIS APCH TO RWY 19R, (FOLLOWING THE ILS LOC AND G/S), A SMALL SMA Y WAS MAKING A VIS APCH TO RWY 19L. SMA Y OVERSHOT THE RWY AND WAS ABOUT HALFWAY BTWN THE RWYS STILL ANGLING TOWARD OUR RWY, WHEN WE INITIATED OUR MISSED APCH. THE VFR PATTERN AT ARPTS WITH CLOSELY SPACED RWYS SHOULD BE ALTERED TO ALLOW A 45 DEG MAX INTERCEPT TO FINAL.

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.