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Near midair collision between an small aircraft on ILS approach and a crossing traffic mooney. Small aircraft was on sea approach control frequency.
| Attributes | |
| ACN | 361203 |
| Time | |
| Date | 199702 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pwt |
| State Reference | WA |
| Altitude | msl bound lower : 2500 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sea |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other descent : approach |
| Route In Use | approach : straight in arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | Other |
| Function | observation : observer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 1500 flight time type : 600 |
| ASRS Report | 361203 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : nmac inflight encounter : vfr in imc non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 300 vertical : 150 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Operational Error Pilot Deviation |
| Situations | |
| ATC Facility | other physical facility procedure or policy : unspecified |
Narrative:
While on an instrument flight for training from boeing field to bremerton, under IFR flight plan and in radar contact with seattle approach, in intermittent IMC conditions, seattle approach cleared us for the ILS runway 19 bremerton approach. As we picked up localizer, seattle approach, told us to switch to advisory frequency for bremerton. Just then, a single engine mooney aircraft passed from left to right very close at high speed. Held off descent on GS until aircraft passed by. Contributing factors: possible radar problems at seattle approach? On nov/mon/97, we tried to fly IFR but were told that sea TRACON was down. Had technical difficulties with radar. Seattle approach should have advised us of this aircraft in our vicinity since we were IMC. We were in and out of clouds when we saw aircraft traveling east to west when we were set up on ILS runway 19 approach.
Original NASA ASRS Text
Title: NMAC BTWN AN SMA ON ILS APCH AND A XING TFC MOONEY. SMA WAS ON SEA APCH CTL FREQ.
Narrative: WHILE ON AN INST FLT FOR TRAINING FROM BOEING FIELD TO BREMERTON, UNDER IFR FLT PLAN AND IN RADAR CONTACT WITH SEATTLE APCH, IN INTERMITTENT IMC CONDITIONS, SEATTLE APCH CLRED US FOR THE ILS RWY 19 BREMERTON APCH. AS WE PICKED UP LOC, SEATTLE APCH, TOLD US TO SWITCH TO ADVISORY FREQ FOR BREMERTON. JUST THEN, A SINGLE ENG MOONEY ACFT PASSED FROM L TO R VERY CLOSE AT HIGH SPD. HELD OFF DSCNT ON GS UNTIL ACFT PASSED BY. CONTRIBUTING FACTORS: POSSIBLE RADAR PROBS AT SEATTLE APCH? ON NOV/MON/97, WE TRIED TO FLY IFR BUT WERE TOLD THAT SEA TRACON WAS DOWN. HAD TECHNICAL DIFFICULTIES WITH RADAR. SEATTLE APCH SHOULD HAVE ADVISED US OF THIS ACFT IN OUR VICINITY SINCE WE WERE IMC. WE WERE IN AND OUT OF CLOUDS WHEN WE SAW ACFT TRAVELING E TO W WHEN WE WERE SET UP ON ILS RWY 19 APCH.
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.