# NTSB SEA86FA233: Cessna 180, N4703B, Wallace, ID, August 31, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: August 31, 1986, 14:00 local (21:00 UTC)
- Place: Wallace, ID
- Coordinates: 47.609344, -115.909553 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6093&lon=-115.9096&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40303
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86FA233
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40303/pdf
- Page: https://openairdocs.org/ntsb/SEA86FA233

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with terrain/water, cruise
  - vfr flight into imc - attempted, pilot in command (cause)
  - preflight briefing service - disregarded, pilot in command (cause)
  - in-flight briefing service - not used, pilot in command (cause)
  - weather condition - clouds (contributing factor)
  - weather condition - fog (contributing factor)
  - weather condition - obscuration (contributing factor)
  - terrain condition - mountainous/hilly (contributing factor)

## Analysis

PLT RECEIVED WX BRIEF, ADVISED VFR FOR PROPOSED FLT. PLT FILED VFR FLT PLAN AND DEPARTED. WRECKAGE LOCATED 2 DAYS LATER AT CREST OF MOUNTAIN PASS.

## Aircraft

- Registration: [N4703B](https://openairdocs.org/deregistered/N4703B-1993-10-20), registration cancelled 1993-10-20, S/N 31601 (OpenAirDocs)
- Reported make and model: CESSNA 180
- Registry model: [Cessna 180](https://openairdocs.org/model/cessna-180) (registry code 2072602) (OpenAirDocs)
- Category: Airplane
- Serial number: 31601
- Airframe hours: 4894
- Engines: CONTINENTAL O-470-K 230 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Edgar E. Ribi
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 20, 1986, 20 hours before
- Departed: BFI, SEATTLE, WA
- Destination: 6S5, HAMILTON, MT
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 65; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 2,700 total, 25 in the last 90 days, 8 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Visibility: 4 statute miles
- Temperature: 57 °F, dew point 55 °F
- Observed at: S06, 5 nm away

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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