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Near midair collision between air carrier-light transport descending and GA-small aircraft.
| Attributes | |
| ACN | 103439 |
| Time | |
| Date | 198902 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sea |
| State Reference | WA |
| Altitude | msl bound lower : 10200 msl bound upper : 10200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Route In Use | arrival other enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 3500 flight time type : 200 |
| ASRS Report | 103439 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac inflight encounter : vfr in imc non adherence : far non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated faa : reviewed incident with flight crew Other |
| Miss Distance | horizontal : 100 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On feb/thu/1989 at XA40 on the descent into seattle on the 158 degree radial, we had a near miss with a yellow and white small aircraft. We had been given a clearance to cross 30 south of seattle at 10000'. Out of 10200 I saw the other aircraft at 12 O'clock and less than 1/2 mi. After taking evasive action I asked seattle center if they showed any other aircraft in our area. The controller, after a short pause, said yes. I proceeded to tell him the distance we passed and color. They tracked the aircraft and had it identified before we landed in seattle. At the time we were in IFR conditions.
Original NASA ASRS Text
Title: NMAC BETWEEN ACR-LTT DESCENDING AND GA-SMA.
Narrative: ON FEB/THU/1989 AT XA40 ON THE DSCNT INTO SEATTLE ON THE 158 DEG RADIAL, WE HAD A NEAR MISS WITH A YELLOW AND WHITE SMA. WE HAD BEEN GIVEN A CLRNC TO CROSS 30 S OF SEATTLE AT 10000'. OUT OF 10200 I SAW THE OTHER ACFT AT 12 O'CLOCK AND LESS THAN 1/2 MI. AFTER TAKING EVASIVE ACTION I ASKED SEATTLE CENTER IF THEY SHOWED ANY OTHER ACFT IN OUR AREA. THE CTLR, AFTER A SHORT PAUSE, SAID YES. I PROCEEDED TO TELL HIM THE DISTANCE WE PASSED AND COLOR. THEY TRACKED THE ACFT AND HAD IT IDENTIFIED BEFORE WE LANDED IN SEATTLE. AT THE TIME WE WERE IN IFR CONDITIONS.
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.