# NTSB SEA90LA196: Beech C-45H, N450G, Twin Falls, ID, September 24, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: September 24, 1990, 02:38 local (08:38 UTC)
- Place: Twin Falls, ID
- Coordinates: 42.410587, -114.58963 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.4106&lon=-114.5896&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41288
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA196
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41288/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA196

## Probable cause

THE PILOT'S INABILITY TO MAINTAIN DIRECTIONAL CONTROL DURING A TAKEOFF IN STRONG CROSSWIND CONDITIONS.

## 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
  - weather condition - crosswind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
- On ground/water encounter with terrain/water, takeoff - aborted
  - terrain condition - soft

## Analysis

THE PILOT OF THE TAILWHEEL EQUIPPED BEECH C-45G LOST DIRECTIONAL CONTROL OF THE AIRCRAFT DURING A TAKEOFF WITH STRONG LEFT CROSSWINDS. HE STATED THAT HE HAD ATTEMPTED TO USE DIFFERENTIAL POWER TO KEEP THE AIRCRAFT STRAIGHT AFTER IT STARTED TO DRIFT OFF THE RUNWAY TO THE LEFT. THE AIRCRAFT WENT OFF THE RIGHT SIDE OF THE RUNWAY WHEN HE ABORTED THE TAKEOFF ATTEMPT.

## Aircraft

- Registration: [N450G](https://openairdocs.org/deregistered/N450G-2014-10-09), registration cancelled 2014-10-09, S/N AF-596, built 1952 (OpenAirDocs)
- Reported make and model: BEECH C-45H
- Registry model: [Beech C-45H](https://openairdocs.org/model/beech-c-45h) (registry code 1151018) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Majestic Airlines, Inc.
- Registered owner: Unknown
- Departed: TWF
- Destination: BOI, BOISE, ID
- Flight plan: VFR
- Airport: TWF, Twin Falls, runway 25, 8,703 × 200 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; flight hours: 14,200 total, 650 in this make and model, 7,050 as pilot in command

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 160° 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 19900924042169A](https://openairdocs.org/incident/19900924042169A), Sep 24, 1990: Beech C45H, Twin Falls, ID, Substantial damage. Began to veer into crosswind,overcompensated with power on opposite engine and aborted as aircraft left the runway.

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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