# NTSB SEA91LA166: Waco UBF, N13075, Lincoln City, OR, August 11, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 11, 1991, 15:00 local (22:00 UTC)
- Place: Lincoln City, OR
- Coordinates: 44.939128, -123.939903 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.9391&lon=-123.9399&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 28, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41478
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA166
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41478/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA166

## Probable cause

IMPROPER PLANNING/DECISION BY THE PILOT, AND HIS DELAY IN ABORTING THE TAKEOFF.  THE TAILWIND & PROXIMITY OF TREES/BRUSH WERE RELATED FACTORS.

## Analysis

ACCORDING TO A WITNESS, THE PILOT BEGAN A DOWNWIND TAKEOFF ON A LAKE, THEN ABORTED THE TAKEOFF.  SUBSEQUENTLY, THE AIRCRAFT COLLIDED WITH TREES AND BRUSH ALONG THE LAKE SHORELINE DURING THE ABORT MANEUVER.  THE PILOT AND WITNESS REPORTED THE WINDS AS 15 AND 30 KNOTS, RESPECTIVELY.

## Sequence of events

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

- On ground/water collision with object, takeoff - aborted
  - planning/decision - improper, pilot in command (cause)
  - weather condition - tailwind (contributing factor)
  - object - tree(s) (contributing factor)
  - aborted takeoff - delayed, pilot in command (cause)

## Aircraft

- Registration: [N13075](https://openairdocs.org/aircraft/N13075), registered now, S/N 3692, built 1933 (OpenAirDocs)
- Reported make and model: WACO UBF
- Registry model: [Waco UBF](https://openairdocs.org/model/waco-ubf) (registry code 9600404) (OpenAirDocs)
- Registry engine: [Continental R670-SERIES series](https://openairdocs.org/engine/continental-r670-series-series) (registry code 17016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3692
- Engines: CONTINENTAL W-670 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Henry R. Strauch
- Registered owner: Henry R. Strauch

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 66; commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; flight hours: 7,000 total, 1,500 in this make and model, 6,000 as pilot in command, 50 in the last 90 days, 25 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F

## 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 19910811034509A](https://openairdocs.org/incident/19910811034509A), Aug 11, 1991: Waco UBF, Lincoln City, OR, Substantial damage. Tried to take off downwind in rough water. Aborted too late entered area of logs. Wing hit tree prior to stopping.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.