# NTSB SEA91LA158: Beech BE-77, N1806C, Benton City, WA, July 6, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 6, 1991, 11:00 local (18:00 UTC)
- Place: Benton City, WA
- Coordinates: 46.239521, -119.49028 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.2395&lon=-119.4903&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report March 24, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41471
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA158
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41471/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA158

## Probable cause

THE PILOT'S DISREGARD OF THE AIRPLANE'S PERFORMANCE CAPABILITY. CONTRIBUTING TO THE ACCIDENT WAS HIGH DENSITY ALTITUDE.

## Sequence of events

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

- In flight collision with terrain/water, go-around (vfr)
  - weather condition - high density altitude (contributing factor)
  - proper climb rate - not possible, pilot in command(cfi)
  - aircraft performance,climb capability - exceeded (cause)
  - performance data - disregarded, pilot in command(cfi) (cause)

## Analysis

THE FLIGHT INSTRUCTOR STATED THAT HE PULLED THE ENGINE IN ORDER TO OBSERVE THE PRIVATE PILOT'S EMERGENCY PROCEDURES, THEN HE DEMONSTRATED A DIFFERENT TECHNIQUE.  DURING THE RECOVERY, THE AIRCRAFT WAS UNABLE TO INITIATE A CLIMB, AND SETTLED INTO THE TERRAIN, WHERE IT TURNED OVER AND STOPPED.

## Aircraft

- Registration: [N1806C](https://openairdocs.org/deregistered/N1806C-1991-09-11), registration cancelled 1991-09-11, S/N WA272 (OpenAirDocs)
- Reported make and model: BEECH BE-77
- Registry model: [Beech 77](https://openairdocs.org/model/beech-77) (registry code 1153007) (OpenAirDocs)
- Category: Airplane
- Serial number: WA 272
- Engines: LYCOMING O-235-L2C 115 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Bergstrom Aircraft, Inc
- Registered owner: Bergstrom Aircraft, Inc
- Departed: PSC, PASCO, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; flight instructor, airline transport; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; flight hours: 6,340 total, 30 in this make and model, 6,160 as pilot in command, 15 in the last 90 days, 4 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point -0 °F
- Altimeter: 30.00 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 19910706026189A](https://openairdocs.org/incident/19910706026189A), Jul 6, 1991: Beech 77, Benton City, WA, Substantial damage. Failed to arrest sink rate on simulated forced landing. Hit ground and nosed over.

## Other investigations on N1806C (1)

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.

- [NTSB SEA85LA062](https://openairdocs.org/ntsb/SEA85LA062), Feb 17, 1985: Beech BE-77 (N1806C), Pasco, WA, substantial damage

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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