# NTSB FTW86FPJ07: Schweizer G-164A, N991X, Red Rock, OK, March 26, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: March 26, 1986, 10:00 local (16:00 UTC)
- Place: Red Rock, OK
- Location: 36.4601° N, 97.1796° W: Placed by OpenAirDocs: center of Red Rock, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.4601&lon=-97.1796&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21938
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FPJ07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21938/pdf
- Page: https://openairdocs.org/ntsb/FTW86FPJ07

## Sequence of events

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

- Loss of engine power, cruise - normal
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Nose over, landing - flare/touchdown
  - terrain condition - open field

## Analysis

THE ACFT NOSED OVER DURING A FORCED LNDG AFTER A POWER LOSS. THE PLT WAS ENROUTE TO A SPRAYING OPERATION AND ATTEMPTED A LANDING IN A PASTURE AFTER THE POWER LOSS. AN ON SCENE INVESTIGATION REVEALED NO DISCREPANCIES IN THE ENGINE OR FUEL SYSTEM. A SUCCESSFUL TEST RUN WAS LATER PERFORMED AT SWEARINGEN ACFT IN BRISTOW,OK ON 7/22/86. THE PLT WAS NEVER LOCATED AFTER THE ACCIDENT AND NO PLT ACC REPORT (NTSB FORM 6120.1) WAS EVER FILED.

## Aircraft

- Registration: [N991X](https://openairdocs.org/deregistered/N991X-1989-03-21), registration cancelled 1989-03-21, S/N 516 (OpenAirDocs)
- Reported make and model: SCHWEIZER G-164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Category: Airplane
- Serial number: 516
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: F. J. Dufek
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, December 6, 1985, 6 hours before
- Departed: F22, PERRY, OK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial; airplane ratings: multi-engine land; medical: unknown, expired; seat: center

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: 2,200 ft broken
- Temperature: 61 °F, dew point 52 °F
- Altimeter: 30.00 inHg
- Observed at: TUL

## 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 19860326008279A](https://openairdocs.org/incident/19860326008279A), Mar 26, 1986: Scwzer G164A, Red Rock, OK, Substantial damage. Engine quit en route to a field. Landed in a pasture and nosed over. Reason for engine stoppage not shown.

## Other investigations on N991X (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 FTW77DPG48](https://openairdocs.org/ntsb/FTW77DPG48), Jun 23, 1977: Grumman G-164A (N991X), Arkadelphia, AR, substantial damage
- [NTSB FTW76FRA11](https://openairdocs.org/ntsb/FTW76FRA11), Aug 19, 1975: Grumman G-164A (N991X), Bay City, TX, 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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