# NTSB CHI84LA262: Grumman G-164A, N6584, Mahnomen, MN, June 26, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 25, 1984, 21:06 local (Jun 26, 1984, 02:06 UTC)
- Place: Mahnomen, MN
- Coordinates: 47.310958, -95.959304 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.3110&lon=-95.9593&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12670
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA262
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12670/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA262

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing
  - terrain condition - ditch (contributing factor)
- Nose over, landing

## Analysis

SHORTLY AFTER TAKING OFF, THE ENG LOST POWER. THE PLT STATED THAT THE ENG STOPPED COMPLETELY 'LIKE FUEL STARVATION.' HE DUMPED HIS LOAD OF CHEMICALS & MADE AN EMERGENCY LANDING.DURING THE LANDING, THE ACFT HIT A DITCH & NOSED OVER. AN INVESTIGATION REVEALED NO DISCREPANCIES EXCEPT THAT THE SPARK PLUGS CONTAINED A SOOTY DEPOSIT.

## Aircraft

- Registration: [N6584](https://openairdocs.org/deregistered/N6584-2026-09-21), registration cancelled 2026-09-21, S/N 723, built 1970 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 723
- Airframe hours: 2762
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Mid-Continent Aircraft Corp.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 23, 1984
- Departed: 6MN5, MAHNOMEN, MN

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial; airplane ratings: single-engine land; medical: class 1, valid medical--no waivers/lim.; seat: center; flight hours: 2,782 total, 763 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 81 °F, dew point 63 °F
- Altimeter: 29.00 inHg
- Observed at: FAR, 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 19840625030989A](https://openairdocs.org/incident/19840625030989A), Jun 25, 1984: Scwzer G164A, Mahnomen, MN, Substantial damage. Engine quit on takeoff. Hit a ditch and flipped over on the forced landing. No engine defects. Possible carb ice.

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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