# NTSB MKC83LA138: Grumman G-164A, N7246, Poplar Bluff, MO, June 28, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 28, 1983, 11:00 local (16:00 UTC)
- Place: Poplar Bluff, MO
- Coordinates: 36.759574, -90.399017 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.7596&lon=-90.3990&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33428
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC83LA138
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33428/pdf
- Page: https://openairdocs.org/ntsb/MKC83LA138

## 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)
- Forced landing, approach
- In flight collision with object, approach
  - terrain condition - none suitable (contributing factor)
  - object - tree(s) (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

AFTER MAKING 2 SWATH RUNS, THE ACFT WAS IN A PROCEDURE TURN-AROUND OVER A WOODED AREA WHEN THE ENG LOST POWER. THE PLT TRIED TO GLIDE TO A SUITABLE AREA, BUT THE ACFT HIT THE TOPS OF TREES & CRASHED. THE OWNER STATED THE ENG HAD A HISTORY OF MAINTENANCE PROBLEMS PRIOR TO THE ACCIDENT, BUT THAT NO SPECIFIC PROBLEM WAS IDENTIFIED. THE ENG WAS DISASSEMBLED AT AN OVERHAUL FACILITY AFTER THE ACCIDENT, BUT NO PREIMPACT/MECHANICAL FAILURE WAS FOUND. THE TEMP & DEW POINT WERE 82 & 75 DEG.

## Aircraft

- Registration: [N7246](https://openairdocs.org/deregistered/N7246-2013-05-06), registration cancelled 2013-05-06, S/N 917, built 1972 (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: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 917
- Airframe hours: 4469
- Engines: P&W R-985-14B 450 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Registered owner: Semo Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 30, 1983, 34 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 1,399 total, 600 in this make and model, 1,358 as pilot in command, 300 in the last 90 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 10 knots
- Visibility: 8 statute miles
- Lowest ceiling: 2,000 ft broken
- Temperature: 82 °F, dew point 75 °F
- Altimeter: 29.00 inHg
- Observed at: CGI, 50 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 19830628027309A](https://openairdocs.org/incident/19830628027309A), Jun 28, 1983: Scwzer G164A, Poplar Bluff, MO, Destroyed. Aircraft crashed when it hit trees during emegency landing after engine malfunction.

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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