# NTSB MIA83LA179: Grumman G-164B, N6531K, Altha, FL, July 1, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 1, 1983, 15:00 local (20:00 UTC)
- Place: Altha, FL
- Coordinates: 30.57048, -85.120033 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.5705&lon=-85.1200&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 30909
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA83LA179
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30909/pdf
- Page: https://openairdocs.org/ntsb/MIA83LA179

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - eng assembly,blower/impeller/integral supercharger - failure,partial (cause)
- Forced landing, landing
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)

## Analysis

THE PLT STATED THAT THE ENG BEGAN LOSING POWER DURING AN AERIAL APPLICATION MISSION. SUBSEQUENTLY, HE LANDED IN A MUDDY FIELD & THE ACFT NOSED OVER. HE STATED THAT THE INDUPARTIAL LOSS OF POWER.

## Aircraft

- Registration: [N6531K](https://openairdocs.org/deregistered/N6531K-2010-08-09), registration cancelled 2010-08-09, S/N 356B, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (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: 357B
- Airframe hours: 1252
- Engines: P&W R-985-14B 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Bobby Yon
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 10, 1983

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 4,434 total, 3,902 in this make and model, 4,360 as pilot in command, 70 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 95 °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 19830701028589A](https://openairdocs.org/incident/19830701028589A), Jul 1, 1983: Scwzer G164B, Altha, FL, Substantial damage. Crash occurred during emergency landing on soft ground. Induction blower on engine failed.

## Other investigations on N6531K (1)

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 MIA78FKJ77](https://openairdocs.org/ntsb/MIA78FKJ77), Aug 19, 1978: Grumman G-164B (N6531K), Altha, FL, 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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