# NTSB SEA84LA138: Cessna 170A, N9231A, La Grande, OR, June 20, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 19, 1984, 20:40 local (Jun 20, 1984, 03:40 UTC)
- Place: La Grande, OR
- Coordinates: 45.31953, -118.199478 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.3195&lon=-118.1995&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39940
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA138
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39940/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA138

## 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
  - reason for occurrence undetermined (cause)
  - directional control - not maintained, pilot in command
  - ground loop/swerve - uncontrolled, pilot in command
- Main gear collapsed, landing - roll
  - terrain condition - soft (contributing factor)
  - landing gear,main gear - overload (contributing factor)

## Analysis

DURING THE LANDING ROLL, THE ACFT VEERED TO THE RIGHT. THE PLT APPLIED LEFT RUDDER, BUT THIS DID NOT HELP. SUBSEQUENTLY, THE ACFT WENT OFF THE RWY & THE LEFT MAIN GEAR SANK INTO SOFT GROUND & COLLAPSED. AN EXAM OF THE ACFT WAS MADE, BUT NO REASON WAS FOUND FOR THE RIGHT BRAKE TO LOCK.

## Aircraft

- Registration: [N9231A](https://openairdocs.org/deregistered/N9231A-1993-04-14), registration cancelled 1993-04-14, S/N 18992 (OpenAirDocs)
- Reported make and model: CESSNA 170A
- Registry model: [Cessna 170A](https://openairdocs.org/model/cessna-170a) (registry code 2072304) (OpenAirDocs)
- Category: Airplane
- Serial number: 18992
- Airframe hours: 2238
- Engines: CONTINENTAL O-300 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Union Lumber Co
- Registered owner: Bronson Lumber Compamy
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 21, 1984
- Airport: LGD, La Grande, runway 29, 4,576 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 69; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: valid medical--w/ waivers/lim; seat: left; flight hours: 2,040 total, 27 in this make and model, 1,861 as pilot in command, 112 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 70 °F
- Altimeter: 30.00 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 19840619027309A](https://openairdocs.org/incident/19840619027309A), Jun 19, 1984: Cessna 170A, Lagrande, OR, Substantial damage. Aircraft ground looped during landing roll causing left gear to collapse and left wing to contact ground.

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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