# NTSB SEA91FA071: Cessna 337, N2107X, Boise, ID, March 26, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: March 26, 1991, 07:48 local (14:48 UTC)
- Place: Boise, ID
- Coordinates: 43.5597, -116.209472 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.5597&lon=-116.2095&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report March 31, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41309
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91FA071
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41309/pdf
- Page: https://openairdocs.org/ntsb/SEA91FA071

## Probable cause

THE PILOT'S FAILURE TO REMOVE THE AIRCRAFT CONTROL LOCKS PRIOR TO ATTEMPTING FLIGHT.  FACTORS INCLUDE AN INADEQUATE PREFLIGHT.

## Sequence of events

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

- Loss of control - in flight, takeoff
  - removal of control/gust lock(s) - not performed, pilot in command (cause)
  - preflight planning/preparation - inadequate, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT OF THE CESSNA 337 FAILED TO REMOVE THE AIRCRAFT'S CONTROL LOCKS. THE AIRCRAFT CRASHED ONTO THE AIRPORT RAMP AREA AFTER TAKING OFF, CLIMBING STEEPLY, AND ROLLING PARTIALLY INVERTED BEFORE IMPACTING NOSE LOW AND LEFT WING DOWN, IN AN APPROXIMATE 95 DEGREE BANK.

## Aircraft

- Registration: [N2107X](https://openairdocs.org/deregistered/N2107X-2002-06-06), registration cancelled 2002-06-06, S/N 337-0007, built 1964 (OpenAirDocs)
- Reported make and model: CESSNA 337
- Registry model: [Cessna 337](https://openairdocs.org/model/cessna-337) (registry code 2075702) (OpenAirDocs)
- Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3370007
- Engines: CONTINENTAL IO-360C & D 210 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Positioning, Part 91
- Operator: Rma, Inc., doing business as Spokane Airways, Inc.
- Destination: GEG, SPOKANE, WA
- Flight plan: IFR
- Airport: BOI, Boise Air Terminal, runway 1, 7,400 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; toxicology performed; flight hours: 8,000 total, 160 in this make and model, 7,800 as pilot in command, 80 in the last 90 days, 40 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 5 knots
- Visibility: 50 statute miles
- Lowest ceiling: 22,000 ft broken
- Temperature: -0 °F, dew point -0 °F
- Altimeter: 29.00 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 19910326007619A](https://openairdocs.org/incident/19910326007619A), Mar 26, 1991: Cessna 337, Boise, ID, Destroyed, 1 fatal. Roll and yaw on climbout. Stalled spiral to impact on ramp improper control lock not removed prior to takeoff.

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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