# NTSB MKC87LA114: Grumman G-164, N730Y, Knoble, AR, June 1, 1987

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 1, 1987, 14:00 local (19:00 UTC)
- Place: Knoble, AR
- Coordinates: 36.310428, -90.599349 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.3104&lon=-90.5993&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report May 9, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 34391
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87LA114
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34391/pdf
- Page: https://openairdocs.org/ntsb/MKC87LA114

## 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)
  - stall/mush - inadvertent, pilot in command (contributing factor)
  - airspeed - inadequate, pilot in command (cause)
- In flight collision with terrain/water, maneuvering - aerial application
  - terrain condition - open field

## Analysis

THE PIC HAD TAKEN OFF FOR A LOCAL AERIAL APPLICATION OPERATION. WHILE MANEUVERING TO MAKE INITIAL APPLICATION THE ACFT STARTED TO LOSE POWER AND SINK DURING A DOWNWIND TURN. PIC DUMPED HIS LOAD BUT ACFT CONTINUED TO SINK UNTIL ONE WING STRUCK THE TERRAIN AND NOSED OVER.

## Aircraft

- Registration: [N730Y](https://openairdocs.org/deregistered/N730Y-2012-07-09), registration cancelled 2012-07-09, S/N 291 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Registry engine: [Jacobs R755B series](https://openairdocs.org/engine/jacobs-r755b-series) (registry code 35007, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 291
- Airframe hours: 2935
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Edward L. Sellmeyer
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, December 17, 1986, 26 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 800 total, 455 in this make and model, 738 as pilot in command, 26 in the last 90 days, 35 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 12 knots
- Lowest ceiling: none
- Temperature: 88 °F, dew point -0 °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 19870601018659A](https://openairdocs.org/incident/19870601018659A), Jun 1, 1987: Scwzer G164, Knoble, AR, Substantial damage. Mushed into the ground during aerial application. The private pilot reported a downdraft. No 137 certification.

## Other investigations on N730Y (3)

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 FTW94LA087](https://openairdocs.org/ntsb/FTW94LA087), Feb 26, 1994: Grumman G-164 (N730Y), Almyra, AR, substantial damage. Probable cause: THE PARTIAL FAILURE OF THE BRAKE MASTER CYLINDER ASSEMBLY FOR UNDETERMINED REASONS. A FACTOR WAS THE SOFT TERRAIN ADJACENT TO THE RUNWAY.
- [NTSB SEA81DYA11](https://openairdocs.org/ntsb/SEA81DYA11), Jun 10, 1981: Grumman G-164 (N730Y), Monteview, ID, substantial damage
- [NTSB MKC72FCJ01](https://openairdocs.org/ntsb/MKC72FCJ01), Jul 1, 1971: Grumman G-164 (N730Y), Ainsworth, NE, destroyed

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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