# NTSB SEA93LA086: Boeing D75N1, N56426, Davenport, WA, April 1, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 1, 1993, 11:30 local (19:30 UTC)
- Place: Davenport, WA
- Coordinates: 47.669654, -118.189826 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6697&lon=-118.1898&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 19, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 43006
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA086
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43006/pdf
- Page: https://openairdocs.org/ntsb/SEA93LA086

## Probable cause

UNSUITABLE TERRAIN WAS SELECTED FOR LANDING. A FACTOR TO THE ACCIDENT WAS: SOFT TERRAIN.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
- Nose over, landing - roll

## Analysis

THE PILOT REPORTED THAT HE WAS FLYING THE AIRPLANE AROUND THE PATTERN TO WARM UP THE OIL IN PREPARATION FOR AN ANNUAL INSPECTION. JUST PRIOR TO THE FLIGHT, A RAIN STORM HAD PASSED OVER THE AREA AND THE DIRT STRIP WAS WET. DURING THE LANDING ROLL, THE RIGHT MAIN LANDING GEAR SANK IN THE MUD. THE PILOT APPLIED THE LEFT BRAKE HARD AND THE AIRPLANE NOSED OVER.

## Aircraft

- Registration: [N56426](https://openairdocs.org/aircraft/N56426), registered now, S/N 75-2322, built 1941 (OpenAirDocs)
- Reported make and model: BOEING D75N1
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Continental W670-6N](https://openairdocs.org/engine/continental-w670-6n) (registry code 17318, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-2322
- Airframe hours: 8050
- Engines: P&W R985-AN14B 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Stuckle, Eugene A.
- Registered owner: Stuckle, Eugene A.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 5, 1991, 7 hours before
- Airport: Private, runway 4, 2,250 × 50 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 60; commercial; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center; flight hours: 1,300 total, 100 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: 1,500 ft broken
- Temperature: 45 °F, dew point 43 °F
- Altimeter: 29.00 inHg

## 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 19930401007509A](https://openairdocs.org/incident/19930401007509A), Apr 1, 1993: Boeing D75N1, Davenport, WA, Substantial damage. Landing on wet dirt strip gear hit a mud hole. Nosed over using brakes to stay on runway.

## Other investigations on N56426 (2)

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.

- [NTSB SEA83LA110](https://openairdocs.org/ntsb/SEA83LA110), May 27, 1983: Boeing Stearman A75N1 (N56426), Turner, WA, substantial damage
- [NTSB SEA75DYG29](https://openairdocs.org/ntsb/SEA75DYG29-201473), Apr 12, 1975: Boeing E75 (N56426), Dayton, WA, substantial damage

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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