# NTSB SEA90LA061: Stinson 108-1, N97781, Boise, ID, April 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 5, 1990, 13:30 local (19:30 UTC)
- Place: Boise, ID
- Coordinates: 43.629287, -116.280143 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.6293&lon=-116.2801&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 12, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41183
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA061
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41183/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA061

## Probable cause

PILOT DID NOT MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE LANDING ROLL.

## 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
  - directional control - not maintained, pilot in command (cause)
  - remedial action - inadequate, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - runway

## Analysis

DURING THE LANDING ROLL, THE PILOT REPORTED THAT THE AIRPLANE BEGAN TO VEER TO THE LEFT. THE PILOT APPLIED HARD RIGHT BRAKE; HOWEVER, THE AIRPLANE CONTINUED TO TRAVEL TO THE LEFT AND OFF THE RUNWAY. A CONTROLLER ON DUTY AT THE TIME OF THE ACCIDENT REPORTED THAT THE AIRPLANE BALLOONED PRIOR TO VEERING TO THE LEFT. THE PILOT REPORTED THAT THERE WERE NO MECHANICAL FAILURES OR MALFUNCTIONS WITH THE AIRPLANE PRIOR TO THE ACCIDENT.

## Aircraft

- Registration: [N97781](https://openairdocs.org/aircraft/N97781), registered now, S/N 108-781, built 1946 (OpenAirDocs)
- Reported make and model: STINSON 108-1
- Registry model: [Stinson 108-1](https://openairdocs.org/model/stinson-108-1) (registry code 9230404) (OpenAirDocs)
- Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 108-1-781
- Engines: FRANKLIN 6A4-150-B3 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Archer, Robert L.
- Departed: U35, CALDWELL, ID
- Airport: BOI, Boise Air, runway 10, 7,399 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 67; private; airplane ratings: single-engine land, single-engine sea, multi-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 11,000 total, 500 in this make and model, 10,900 as pilot in command, 90 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 7 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 27 °F
- Altimeter: 29.00 inHg
- Observed at: BOI

## 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 19900405007809A](https://openairdocs.org/incident/19900405007809A), Apr 5, 1990: Univar 1081, Boise, ID, Substantial damage. Allowed aircraft to ground loop into crosswind while making a wheel landing.

## Other investigations on N97781 (1)

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 SEA82DA158](https://openairdocs.org/ntsb/SEA82DA158), Sep 8, 1982: Stinson 108-1 (N97781), Twin Falls, ID, 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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