# NTSB MKC87LA105: Grumman G-164, N484Y, Knobel, AR, May 21, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 21, 1987, 12:30 local (17:30 UTC)
- Place: Knobel, AR
- Coordinates: 36.31081, -90.600517 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.3108&lon=-90.6005&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 29, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 34383
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87LA105
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34383/pdf
- Page: https://openairdocs.org/ntsb/MKC87LA105

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - weather condition - gusts (contributing factor)
  - weather condition - unfavorable wind (contributing factor)
  - compensation for wind conditions - improper, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
- On ground/water encounter with terrain/water, takeoff - roll/run
  - terrain condition - ditch

## Analysis

THE PIC STATED THAT THE ACFT WAS STRUCK BY A GUST OF WIND, AND HE LOST CONTROL. THE PIC APPLIED RT RUDDER TOWARDS A 1OFT DITCH IN AN ATT TO GET OVER IT. THE ACFT WAS TOO HEAVY TO FLY OVER THE DITCH AND THE ACFT IMPACTED INTO THE DITCH. A REVIEW OF WX COND'S OBTAINED FM THE FAA FLT SVC STN AT JONESBORO, AR, INDICATED THAT WINDS WERE FM THE SOUTHWEST AT 10 KNOTS. FURTHER REVIEW INDICATED THAT FOR THE HR BEFORE AND THE HOUR FOLLOWING THE RPTD TIME OF THE ACC, THE WIND HAD NOT CHG'D DIR, OR WIND SPD FM THAT RPTD BY THE FLT SVC STN. THE PIC RPTD NO MECHANICAL CONTROL DIFFICULTY OR MALF DURING THE TAKEOFF ROLL OR SUBSEQUENT TO THE ACC.

## Aircraft

- Registration: [N484Y](https://openairdocs.org/deregistered/N484Y-1997-09-10), registration cancelled 1997-09-10, S/N 128 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Category: Airplane
- Serial number: 128
- Airframe hours: 4227
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Fraine Flying Svc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 5, 1987, 8 hours before
- Airport: PVT, runway 9, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 4,218 total, 150 in this make and model, 4,218 as pilot in command, 40 in the last 90 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 10 knots
- Visibility: 9 statute miles
- Temperature: 91 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: JBR, 31 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 19870521015989A](https://openairdocs.org/incident/19870521015989A), May 21, 1987: Scwzer G164, Knobel, AR, Substantial damage. Allowed a side gust of wind to drift off runway alignment. Lost control and struck a ditch.

## Other investigations on N484Y (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 FTW75DRJ35](https://openairdocs.org/ntsb/FTW75DRJ35), May 26, 1975: Grumman G-164 (N484Y), Jones, LA, substantial damage
- [NTSB FTW69F0042](https://openairdocs.org/ntsb/FTW69F0042), May 24, 1968: Grumman G-164 (N484Y), Jones, LA, 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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