# NTSB SEA93LA085: Schweizer G-164A, N8734H, Walla Walla, WA, March 30, 1993

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: March 30, 1993, 07:45 local (15:45 UTC)
- Place: Walla Walla, WA
- Coordinates: 46.109252, -118.300254 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.1093&lon=-118.3003&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 13, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 43005
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA085
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43005/pdf
- Page: https://openairdocs.org/ntsb/SEA93LA085

## Probable cause

A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. THE LACK OF A SUITABLE LANDING AREA WAS A FACTOR.

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - none suitable (contributing factor)

## Analysis

THE PILOT OF THE AGRICULTURAL AIRCRAFT STATED THAT HE HAD JUST COMPLETED HIS SECOND SPRAY PASS OF THE MORNING WHEN THE ENGINE QUIT WITHOUT WARNING. HE ATTEMPTED A FORCED LANDING IN A WHEAT FIELD.  THE AIRCRAFT NOSED OVER AFTER TOUCHDOWN IN THE SOFT FIELD.  AFTER EXITING FROM THE COCKPIT, THE PILOT ATTEMPTED TO PUT OUT A SMALL FIRE ON THE ENGINE, BUT WAS UNSUCCESSFUL.  THE AIRCRAFT WAS CONSUMED BY FIRE.  AN FAA INSPECTOR INSPECTED THE WRECKAGE AND FOUND NO MECHANICAL DISCREPANCIES.  HE STATED THAT HE BELIEVED THE PILOT HAD ENCOUNTERED CARBURETOR ICING CONDITIONS.

## Aircraft

- Registration: [N8734H](https://openairdocs.org/deregistered/N8734H-2005-07-18), registration cancelled 2005-07-18, S/N 1503, built 1975 (OpenAirDocs)
- Reported make and model: SCHWEIZER G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1503
- Airframe hours: 4423
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Operator: Blue Mountain Aviation
- Registered owner: Blue Mountain Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 4, 1993, 40 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 2,360 total, 912 in this make and model, 2,306 as pilot in command, 103 in the last 90 days, 92 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 40° at 4 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 48 °F, dew point 34 °F
- Altimeter: 30.00 inHg
- Observed at: ALW, 5 nm away

## 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 19930330007459A](https://openairdocs.org/incident/19930330007459A), Mar 30, 1993: Scwzer G164A, Walla Walla, WA, Destroyed. Engine quit on spray run. Nosed over and burned on landing. Carburetor ice beleived to be culprit.

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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