# NTSB SEA93LA104: Beech A36, N435BW, Seaside, OR, May 11, 1993

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: May 11, 1993, 15:39 local (22:39 UTC)
- Place: Seaside, OR
- Coordinates: 45.850898, -123.570564 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.8509&lon=-123.5706&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor
- Status: Completed, report October 13, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 43018
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA104
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43018/pdf
- Page: https://openairdocs.org/ntsb/SEA93LA104

## Probable cause

THE PILOT IN COMMAND'S DELAYING THE GO AROUND. FACTORS CONTRIBUTING TO THE ACCIDENT WERE TAILWINDS AND THE PILOT IN COMMAND'S MISJUDGEMENT OF WIND INFORMATION.

## Sequence of events

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

- In flight collision with terrain/water, go-around (vfr)
  - weather condition - tailwind (contributing factor)
  - wind information - misjudged, pilot in command (contributing factor)
  - go-around - delayed, pilot in command (cause)

## Analysis

THE PILOT ENTERED THE AIRPORT TRAFFIC PATTERN AND INITIATED AN APPROACH TO RUNWAY 16. A WITNESS MOWING GRASS NEAR THE THRESHOLD TO RUNWAY 16 REPORTED THE WINDSOCK 'SHOWING A STRONG STEADY WIND FROM THE NORTH' AND NORTHERLY WINDS WERE CONFIRMED BY A WITNESS AT THE AIRPORT'S SOUTH END. WINDS AT NEARBY COASTAL AIRPORTS WERE CONSISTENTLY FROM THE NORTHWEST AT 12 TO 21 KNOTS DURING THE AFTERNOON OF THE ACCIDENT. THE FIRST WITNESS ALSO REPORTED OBSERVING THE AIRCRAFT FLARE 4 OR 5 TIMES IN THE LENGTH OF THE RUNWAY BEFORE IMPACTING THE ROAD.

## Aircraft

- Registration: [N435BW](https://openairdocs.org/deregistered/N435BW-1993-06-17), registration cancelled 1993-06-17, S/N E811 (OpenAirDocs)
- Reported make and model: BEECH A36
- Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs)
- Category: Airplane
- Serial number: E-811
- Engines: CONTINENTAL IO-520 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Theodorson, Robert & Dorothy
- Registered owner: Theodorson, Robert & Dorothy
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 8, 1993, 19 hours before
- Departed: SLE, SALEM, OR
- Airport: 56S, Seaside Municipal, runway 16, 2,357 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 3,101 total, 1,255 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 21 knots, gusting 27
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 57 °F, dew point 50 °F
- Altimeter: 29.00 inHg
- Observed at: AST, 9 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19930511013239A](https://openairdocs.org/incident/19930511013239A), May 11, 1993: Beech A36, Seaside, OR, Substantial damage. Tried to land in strong gusty tailwind. Flared several times. Began late go around. Struck road lip. Slid into swamp.

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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