Narrative:

Shortly before being cleared for the runway 7 ILS to burbank, we were on top of the overcast, level at 5000' (assigned), approximately heading 150 degree (assigned), speed 170 KT (assigned) and being vectored by burbank approach control. The aircraft was on autoplt, with the captain flying. Descent and approach checklists were complete and I was scanning for traffic. A light aircraft suddenly appeared at our 12 O'clock position, at or slightly below our altitude, opposite direction, less than 1 mi. I yelled out the traffic to the captain and immediately took the controls and rolled right to avoid a collision (approximately 20 degree bank). The captain hen took control and climbed slightly. The small aircraft passed by our left side, within 300-500' laterally and 100' vertically. I told approach control that 'there was an small aircraft out there and we almost hit him.' approach replied 'roger' and then immediately issued us a turn to intercept the localizer and cleared us for the ILS 7 at burbank. The captain returned to original heading and altitude prior to receiving approach clearance. The small aircraft traffic had not been called out by ATC. After landing, the captain contacted the ATC supervisor by phone and filed a near midair collision report. ATC stated that they were not tracking the small aircraft and had no idea where he went. In checking the los angeles area chart later, it appeared we were outside the burbank arsa at the time of the incident. Supplemental information from acn 113143: a light aircraft appeared from behind my windshield post. Total heading change was about 20 degree and total altitude change of about 100'.

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Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG GA-SMA WEST OF BUR ARSA.

Narrative: SHORTLY BEFORE BEING CLRED FOR THE RWY 7 ILS TO BURBANK, WE WERE ON TOP OF THE OVERCAST, LEVEL AT 5000' (ASSIGNED), APPROX HDG 150 DEG (ASSIGNED), SPEED 170 KT (ASSIGNED) AND BEING VECTORED BY BURBANK APCH CTL. THE ACFT WAS ON AUTOPLT, WITH THE CAPT FLYING. DSCNT AND APCH CHECKLISTS WERE COMPLETE AND I WAS SCANNING FOR TFC. A LIGHT ACFT SUDDENLY APPEARED AT OUR 12 O'CLOCK POSITION, AT OR SLIGHTLY BELOW OUR ALT, OPPOSITE DIRECTION, LESS THAN 1 MI. I YELLED OUT THE TFC TO THE CAPT AND IMMEDIATELY TOOK THE CONTROLS AND ROLLED RIGHT TO AVOID A COLLISION (APPROX 20 DEG BANK). THE CAPT HEN TOOK CONTROL AND CLIMBED SLIGHTLY. THE SMA PASSED BY OUR LEFT SIDE, WITHIN 300-500' LATERALLY AND 100' VERTICALLY. I TOLD APCH CTL THAT 'THERE WAS AN SMA OUT THERE AND WE ALMOST HIT HIM.' APCH REPLIED 'ROGER' AND THEN IMMEDIATELY ISSUED US A TURN TO INTERCEPT THE LOC AND CLRED US FOR THE ILS 7 AT BURBANK. THE CAPT RETURNED TO ORIGINAL HDG AND ALT PRIOR TO RECEIVING APCH CLRNC. THE SMA TFC HAD NOT BEEN CALLED OUT BY ATC. AFTER LNDG, THE CAPT CONTACTED THE ATC SUPVR BY PHONE AND FILED A NEAR MIDAIR COLLISION REPORT. ATC STATED THAT THEY WERE NOT TRACKING THE SMA AND HAD NO IDEA WHERE HE WENT. IN CHECKING THE LOS ANGELES AREA CHART LATER, IT APPEARED WE WERE OUTSIDE THE BURBANK ARSA AT THE TIME OF THE INCIDENT. SUPPLEMENTAL INFORMATION FROM ACN 113143: A LIGHT ACFT APPEARED FROM BEHIND MY WINDSHIELD POST. TOTAL HDG CHANGE WAS ABOUT 20 DEG AND TOTAL ALT CHANGE OF ABOUT 100'.

Data retrieved from NASA's ASRS site as of August 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.