# NTSB SEA83IA034: Swearingen SA-226TC, Klamath Falls, OR, December 23, 1982

- Type: NTSB incident investigation
- Date: December 23, 1982, 01:49 UTC, 17:49 local (the day before locally)
- Place: Klamath Falls, OR
- Coordinates: 42.310173, -122.069046 (estimated)
- Highest injury: No injuries
- Injuries: 11 uninjured
- Status: Completed
- Report: Approved by Office Director, December 22, 1983
- NTSB case key (mKey): 71280
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83IA034
- NTSB report (PDF): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71280/pdf
- Page: https://openairdocs.org/ntsb/SEA83IA034

## Analysis

DURING TAKEOFF ON RUNWAY 14 WITH THE WINDS FROM 310 DEG AT 17 KNOTS, SATISFACTORY ACCELERATION OCCURRED THROUGH 70 KNOTS FOLLOWED BY A SLOWING RATE OF ACCELERATION AT 80 KNOTS. THE CAPTAIN THEN REDUCED POWER AND SHORTLY THEREAFTER FELT THE LEFT MAIN TIRES STRIKE SOMETHING AND THE AIRCRAFT BEGAN A LEFT YAW. ATTEMPTS TO REGAIN DIRECTIONAL CONTROL WERE UNSUCCESSFUL AN N5475M ROLLED OFF THE EAST SIDE OF THE RUNWAY AND STRUCK A SNOWBANK. THE CREW SHUT DOWN THE ENGINES AND EVACUATED THE PASSENGERS. THE DOWNWIND TAKEOFF WAS NECESSITATED BY VISIBILITY REQUIREMENTS FOR THE DEPARTURE.

## Sequence of events

- Loss of control - on ground/water, takeoff - roll/run
  - aircraft performance,takeoff capability - deteriorated (contributing factor)
  - aborted takeoff - performed, pilot in command
  - terrain condition - snow covered (cause)
  - weather condition - unfavorable wind (cause)
  - directional control - not maintained, pilot in command (cause)
- On ground/water collision with object, other
  - terrain condition - snowbank (contributing factor)

## Aircraft

- Registration: N5475M (not matched to a registry record)
- Reported make and model: SWEARINGEN SA-226TC
- Category: Airplane
- Serial number: TC296
- Airframe hours: 7112
- Engines: GARRETT TPG331-3 940 horsepower
- Damage: Minor damage
- Flight: Unknown, Part 135
- Operator: GATX THIRD AIRCRAFT CORP.
- Departed: KLAMATH FALLS, OR
- Destination: C, MEDFORD, OR
- Airport: KINGSLEY FIELD, runway 14

## Flight crew

- Pilot; age 36; airline transport; medical class 1; hours: 6 24 hours, 6 24 hours in this make and model, 78 30 days, 78 30 days in this make and model, 235 90 days, 235 90 days in this make and model, 7,449 pic, 3,687 pic in this make and model, 7,978 total, 3,783 total in this make and model

## Weather

- Conditions: Instrument (IMC), Night/dark
- Wind: 310° at 17 knots
- Temperature (°F): 84.2

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.