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Large transport on final ILS approach to sea airport had near midair collision with small aircraft VFR aircraft.
| Attributes | |
| ACN | 124338 |
| Time | |
| Date | 198910 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sea airport : bfi |
| State Reference | WA |
| Altitude | msl bound lower : 1300 msl bound upper : 1300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sea |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 22000 flight time type : 10000 |
| ASRS Report | 124338 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew Other |
| Miss Distance | horizontal : 200 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At 1300' MSL on ILS final to 16R seatac, I saw a single engine small aircraft aircraft 200' off left side (10 O'clock) level heading about 300 degree toward my tail. I told sea tower, filed near miss report on ground. Tower told me small aircraft had departed boeing field, climbed above assigned altitude, and was not reporting mode C.
Original NASA ASRS Text
Title: LGT ON FINAL ILS APCH TO SEA ARPT HAD NMAC WITH SMA VFR ACFT.
Narrative: AT 1300' MSL ON ILS FINAL TO 16R SEATAC, I SAW A SINGLE ENGINE SMA ACFT 200' OFF LEFT SIDE (10 O'CLOCK) LEVEL HDG ABOUT 300 DEG TOWARD MY TAIL. I TOLD SEA TWR, FILED NEAR MISS REPORT ON GND. TWR TOLD ME SMA HAD DEPARTED BOEING FIELD, CLIMBED ABOVE ASSIGNED ALT, AND WAS NOT REPORTING MODE C.
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.