# NTSB SEA83LA206: Grumman G-164B, N6674Q, Selah, WA, September 28, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 28, 1983, 10:20 local (17:20 UTC)
- Place: Selah, WA
- Coordinates: 46.760116, -120.680793 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.7601&lon=-120.6808&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39774
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA206
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39774/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA206

## Sequence of events

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

- Nose over, landing
  - parking brakes - improper use of, pilot in command (cause)

## Analysis

WHILE LANDING ON A ROAD, DURING AN AERIAL APPLICATION OPERATION, THE ACFT NOSED OVER. ACCORDING TO THE PLT, THE BRAKES HAD NOT RELEASED AFTER HE HAD RELEASED THE TOE BRAKES. HE REPORTED THAT HE FOUND THE PARKING BRAKE MIDWAY BETWEEN THE ON & OFF POSITIONS.

## Aircraft

- Registration: [N6674Q](https://openairdocs.org/deregistered/N6674Q-2012-07-20), registration cancelled 2012-07-20, S/N 196B, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 196B
- Airframe hours: 1997
- Engines: CONTINENTAL R-975 525 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: David R. Mahre
- Airworthiness certificate: Special, Restricted (Special)
- Airport: None

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 5,975 total, 1,704 in this make and model, 165 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 6 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 54 °F, dew point 27 °F
- Altimeter: 30.00 inHg
- Observed at: YKM, 6 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 19830928057899A](https://openairdocs.org/incident/19830928057899A), Sep 28, 1983: Scwzer G164B, Selah, WA, Substantial damage. Pilot failed to completely release parking brake prior to flight. Brakes locked on landing. Aircraft nosed over.

## Other investigations on N6674Q (2)

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 LAX96LA124](https://openairdocs.org/ntsb/LAX96LA124), Feb 21, 1996: Schweizer G-164B (N6674Q), Tracy, CA, substantial damage. Probable cause: overheating and failure of the engine's master rod and master rod bearing due to oil starvation. A factor relating to the accident was: the lack of suitable terrain for an emergency landing.
- [NTSB SEA83LA063](https://openairdocs.org/ntsb/SEA83LA063), Mar 16, 1983: Grumman 164B (N6674Q), Toppenish, 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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