# NTSB SEA82DA021: Cessna 340A, N4604N, Sunriver, OR, January 28, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: January 28, 1982, 07:45 local (15:45 UTC)
- Place: Sunriver, OR
- Coordinates: 44.070625, -121.250663 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0706&lon=-121.2507&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 28, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72762
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA82DA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72762/pdf
- Page: https://openairdocs.org/ntsb/SEA82DA021

## Analysis

THE INSTRUCTOR WAS PROVIDING DUAL INSTRUCTION TO A PRIVATE PILOT WITH NO PREVIOUS TIME IN THIS NOR ANY MULTI- ENGINE AIRCRAFT. ALSO, THE PIRVATE PILOT HAD NOT FLOWN WITHIN THE PREVIOUS 90 DAYS. HE INITIATED A TAKEOFF ON RUNWAY 18 WITH THE WIND FROM 210 DEGREES AT 5 KNOTS. THE RUNWAY WAS COVERED WITH PACKED DRY SNOW. IT CONTAINED RUTS AND HAD HIGH SNOW PILED ALONG THE EDGES. WHILE ROLLING, THE AIRCRAFT DRIFTED LEFT AND THE LEFT WING STRUCK A SNOWBANK. THE PLANE THEN VEERED OFF THE RUNWAY AND WAS SUBSTANTIALLY DAMAGED.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - airport facilities,runway/landing area condition - rough/uneven (contributing factor)
  - airport facilities,runway/landing area condition - snow covered (contributing factor)
  - directional control - not maintained, dual student (cause)
  - lack of familiarity with aircraft, dual student (contributing factor)
  - ground loop/swerve - inadvertent, dual student
  - supervision - inadequate, pilot in command(cfi) (cause)
- On ground/water encounter with terrain/water, takeoff - roll/run
  - airport facilities,runway/landing area condition - snowbank (contributing factor)

## Aircraft

- Registration: [N4604N](https://openairdocs.org/aircraft/N4604N), registered now, S/N 340A1016, built 1980 (OpenAirDocs)
- Reported make and model: CESSNA 340A
- Registry model: [Cessna 340A](https://openairdocs.org/model/cessna-340a) (registry code 2076405) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 340A1016
- Airframe hours: 688
- Engines: CONTINENTAL TSIO-520-NB 310 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Daniel C. Pennington
- Registered owner: Donald A. Pennington
- Departed: OR35, SUNRIVER, OR
- Destination: LAVERNE, CA
- Flight plan: IFR
- Airport: OR35, Sunriver, runway 18, 4,500 × 55 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 2,084 total, 50 in this make and model, 1,819 as pilot in command, 65 in the last 90 days, 5 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 5 knots
- Visibility: 15 statute miles
- Temperature: 90 °F
- Observed at: RDM, 19 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 19820128002459A](https://openairdocs.org/incident/19820128002459A), Jan 28, 1982: Cessna 340CESSNA, Sunriver, OR, Substantial damage. Pilots allowed aircraft to veer off runway and wing struck snowbank causing substantial damage.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.