# NTSB FTW94LA214: Grumman G-164A, N5321, Coy, AR, June 24, 1994

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 24, 1994, 13:45 local (18:45 UTC)
- Place: Coy, AR
- Coordinates: 34.539821, -91.870864 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.5398&lon=-91.8709&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 7, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 19098
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW94LA214
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19098/pdf
- Page: https://openairdocs.org/ntsb/FTW94LA214

## Probable cause

THE SEPARATION OF THE LANDING GEAR DUE TO FAILURE OF THE LANDING GEAR AXLE BOLTS.

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,axle - separation (cause)
  - aircraft control - not possible, pilot in command
- Nose over, landing - roll

## Analysis

THE LANDING GEAR AXLE BOLTS ON THE LEFT MAIN LANDING GEAR SHEARED DURING THE LANDING ROLLOUT AT AN AGRICULTURAL AIRSTRIP. THE LANDING GEAR STRUT DUG INTO THE GROUND AND THE AIRPLANE NOSED OVER COMING TO REST INVERTED. THE FAILED BOLTS HAD BEEN INSTALLED ON THE AIRPLANE FOR APPROXIMATELY 1,700 FLIGHT HOURS.

## Factual narrative

On June 24, 1994, at 1345 central daylight time, a Grumman G-164A, N5321, was substantially damaged while landing near Coy, Arkansas.  The commercial pilot was not injured.  Visual meteorological conditions prevailed for the aerial application flight.

According to the operator, the landing gear axle for the left main landing gear broke during landing rollout.  The left main landing gear strut assembly dug into the ground, and the airplane nosed over on its back.  Inspection of the landing gear strut by the operator's mechanic revealed that the landing gear axle bolts sheared during the landing.

The operator stated that the failed bolts were installed approximately 1,700 flight hours prior to the accident.

## Aircraft

- Registration: [N5321](https://openairdocs.org/deregistered/N5321-2012-09-06), registration cancelled 2012-09-06, S/N 604 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Category: Airplane
- Serial number: 604
- Airframe hours: 5890
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Farmers Flying Service, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 29, 1994, 200 hours before
- Airport: NONE, Farmers Flying Service, runway 27, 2,200 × 30 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 6,600 total, 6,600 in this make and model, 6,600 as pilot in command, 500 in the last 90 days, 200 in the last 30 days, 12 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 3 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 66 °F
- Altimeter: 29.00 inHg
- Observed at: SGT, 15 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 19940624016809A](https://openairdocs.org/incident/19940624016809A), Jun 24, 1994: Scwzer G164A, Coy, AR, Substantial damage. Left main gear axle bolts sheared on landing. Strut dug in. Nosed over. Bolts had 1700HRS on them. Rough landing.

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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