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SEA86LA031

1985-12-27 · SPOKANE, Washington, United States · None · 1 aircraft · Status: Completed

Airport GEG

Aircraft involved

Factual narrative

THE PLT REPORTED ENCOUNTERING ICING CONDITIONS DURING HIS APCH TO SPOKANE. UPON ARRIVAL, THE ACFT REMAINED AT SPOKANE FOR 30-40 MINUTES DURING WHICH FREEZING DRIZZLE AND BELOW FREEZING TEMPS EXISTED PRIOR TO AND DURING THE DEPARTURE. THE PLT DID NOT UTILIZE THE MANUALLY OPERATED ALTERNATE AIR SYSTEM ABOARD THE ACFT AND AS A RESULT, COLD, MOIST AIR WAS ENTRAINED INTO THE SUBFREEZING FILTER CHAMBERS. THE GRADUAL BLOCKAGE OF AIR FROM ICE IN THE FILTERS RESULTED IN A LOSS OF PWR ON BOTH ENGS. WITH SUFFICIENT PWR AVAILABLE THE PLT CHOSE TO EXECUTE AN INTENTIONAL FORCED LANDING. THE ACFT STRUCK AN ARPT PERIMETER FENCE DURING THE LANDING AND GROUND SLIDE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1985_SEA86LA031.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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