# NTSB SEA91LA191: Grumman G-164A, N6702Q, Hamer, ID, July 24, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 24, 1991, 14:00 local (20:00 UTC)
- Place: Hamer, ID
- Coordinates: 44.220924, -112.369819 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.2209&lon=-112.3698&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 23, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41497
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA191
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41497/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA191

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN RUNWAY ALIGMENT.  FACTORS INCLUDE HIGH VEGETATION, AND AN INADVERENT GROUND LOOP/SWERVE.

## Sequence of events

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

- On ground/water encounter with terrain/water, landing - roll
  - proper alignment - not maintained, pilot in command (cause)
  - terrain condition - crop (contributing factor)
  - ground loop/swerve - inadvertent (contributing factor)

## Analysis

THE PILOT OF THE GRUMAN G-164A WAS LANDINGG AT A PRIVATE AGRICULTURAL AIRSTRIP, WHEN THE SPRAY BOOM CONTACTED SOME TALL WHEAT GROWING NEAR THE EDGE OF THE RUNWAY.  THE PILOT STATED THAT JUST AS THE TAILWHEEL WAS BEING LOWERED TO THE GROUND, THE LEFT WING SPRAY BOOM STRUCK THE WHEAT, CAUSING THE AIRCRAFT TO TURN SHARPLY TO THE LET.  THE AIRCRAFT THE BEGAN TO SLIDE SIDEWAYS, EVENTUALLY COLLAPSING THE RIGHT MAIN GEAR.

## Aircraft

- Registration: [N6702Q](https://openairdocs.org/deregistered/N6702Q-2008-12-08), registration cancelled 2008-12-08, S/N 1707, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN 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: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01517, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 1707
- Airframe hours: 1185
- Engines: GARRETT TPE3312201A 715 horsepower turbo prop
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Overland Ag Inc
- Registered owner: Overland Ag Inc
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 23, 1991, 200 hours before
- Airport: Larsen Farms, runway 18, 3,000 × 50 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,256 total, 350 in this make and model, 3,200 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 90 °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 19910724032089A](https://openairdocs.org/incident/19910724032089A), Jul 24, 1991: Scwzer G164A, Hamer, ID, Substantial damage. Spray boom caught tall wheat on edge of ag strip on landing. Rotated into wheat. Slid sideways collapsed right gear

## Other investigations on N6702Q (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 SEA08CA183](https://openairdocs.org/ntsb/SEA08CA183), Aug 18, 2008: Grumman Acft Eng G-164A (N6702Q), Hazelton, ID, substantial damage. Probable cause: The pilot's inadequate compensation for the tailwind and failure to attain and maintain airspeed, which resulted in an inadvertent stall. The tailwind was a contributing factor.
- [NTSB SEA05LA146](https://openairdocs.org/ntsb/SEA05LA146), Jul 19, 2005: Grumman G-164A (N6702Q), Jerome, ID, substantial damage. Probable cause: Failure to maintain clearance from terrain during takeoff and initial climb. A high density altitude was a factor.

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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