SEA86LA141
1986-06-07 · KETCHIKAN, Alaska, United States · Minor · 1 aircraft · Status: Completed
Airport 5KE
Aircraft involved
Factual narrative
THE PLT FELT A SUDDEN HARD JOLT WHILE IN CRUISE FLT. THE ACFT ASSUMED A NOSE LOW, LEFT WING DOWN ATTITUDE WHICH THE PLT WAS UNABLE TO CORRECT BY USE OF POWER AND CONTROL INPUTS. THE ACFT WAS AT A LOW ALTITUDE DUE TO WEATHER. THE ACFT IMPACTED THE WATER IN A LEFT WING DOWN, NOSE LOW ATTITUDE SHORTLY AFTER THE LOSS OF CONTROL. AFTER THE ACFT WAS RECOVERED IT WAS DISCOVERED THAT THE LEFT FLOAT HAD SEPARATED IN FLIGHT CAUSING A LOSS OF CONTROL. METALLURGICAL EXAMINATION REVEALED PRE-EXISTING FATIGUE CRACKING OF TWO STEEL MEMBERS. THE LOW TENSILE STRENGTH AND MARGINAL QUALITY OF THE STEEL CONTRIBUTED TO THE EARLY FAILURE OF THE FITTNG. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1986_SEA86LA141.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (loss of control). All research papers
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- Semantic Scholar 2021 · Article (Aviation) ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
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- NASA NTRS 2021 · Presentation Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
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