# NTSB SEA91LA214: Beech 58TC, N350TH, Kalispell, MT, August 17, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 17, 1991, 11:20 local (17:20 UTC)
- Place: Kalispell, MT
- Coordinates: 48.190319, -114.379791 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.1903&lon=-114.3798&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report May 27, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41518
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA214
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41518/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA214

## Probable cause

THE PILOT'S FAILURE TO EXTEND THE LANDING GEAR.  A FACTOR CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S FAILURE TO IDENTTIFY A DOWN AND LOCKED LANDING GEAR CONDITION PRIOR TO TOUCHDOWN.

## Sequence of events

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

- Gear not extended, landing - flare/touchdown
  - gear extension - not performed, pilot in command (cause)
  - gear down and locked - not identified, pilot in command (contributing factor)

## Analysis

AT THE CONCLUSION OF A LOCAL SIGHTSEENG FLIGHT, THE PILOT REPORTEDBLY LOWERED THE LANDING GEAR AND 'THOUGHT (HE) SAW THREE GREEN LIGHTS.'  THE AIRCRAFT SUBSEQUENTLY LANDED GEAR UP ON RUNWAY 02.  POST-CRASH EXAMINATION REVEALED THE LANDING GEAR SELECTOR WAS IN THE 'DOWN' POSTION WITH THE LANDING GEAR CIRCUIT BREAKER POPPED.  REPEATED CYCLING OF THE GEAR WITH THE AIRCRAFT ON JACKS REVEALED NO DISCREPANCY WITH THE OPERTION OF THE LANDING GEAR SYSTEM.

## Aircraft

- Registration: [N350TH](https://openairdocs.org/deregistered/N350TH-2012-09-12), registration cancelled 2012-09-12, S/N TK-146, built 1982 (OpenAirDocs)
- Reported make and model: BEECH 58TC
- Registry model: [Beech 58TC](https://openairdocs.org/model/beech-58tc) (registry code 1152746) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TK146
- Engines: CONTINENTAL TSIO-520-WB 325 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Orin O. Terry
- Registered owner: Orin O. Terry
- Airport: FCA, Glacier Park Intl, runway 2, 8,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; flight hours: 2,134 total, 134 in this make and model, 1,800 as pilot in command, 45 in the last 90 days, 11 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 13 knots
- Visibility: 35 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 19910817035149A](https://openairdocs.org/incident/19910817035149A), Aug 17, 1991: Beech 58TC, Kalispell, MT, Substantial damage. Landed gear up. No gear defects found.

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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