# NTSB FTW86LPJ10: Grumman G-164, N788Y, Hooker, OK, June 27, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: June 27, 1986, 10:30 local (15:30 UTC)
- Place: Hooker, OK
- Coordinates: 36.849067, -101.21099 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.8491&lon=-101.2110&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 22109
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86LPJ10
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22109/pdf
- Page: https://openairdocs.org/ntsb/FTW86LPJ10

## Sequence of events

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

- Nose over, landing - flare/touchdown
  - airport facilities,runway/landing area condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Analysis

THE PILOT STATED THAT THE AIRCRAFT FLIPPED OVER WHEN HE LANDED IN SOFT DIRT ON HIS RECENTLY EXTENDED PRIVATE LANDING STRIP.

## Aircraft

- Registration: [N788Y](https://openairdocs.org/deregistered/N788Y-1989-12-19), registration cancelled 1989-12-19, S/N 180 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Category: Airplane
- Serial number: 180
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Ronald W. Gray
- Airworthiness certificate: Special, Restricted (Special)
- Airport: Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, unknown; seat: front

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: LBL, 20 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 19860627028399A](https://openairdocs.org/incident/19860627028399A), Jun 27, 1986: Scwzer G164, Hooker, OK, Substantial damage. Flipped over upon striking soft dirt after landing. Undershot suitable landing area.

## Other investigations on N788Y (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 FTW89DPJ08](https://openairdocs.org/ntsb/FTW89DPJ08), Jul 8, 1989: Grumman G-164 (N788Y), Guymon, OK, substantial damage. Probable cause: FAILURE OF THE UPPER RIGHT ENGINE MOUNT (FIREWALL ATTACH BOLT) DUE TO FATIGUE, AND FAILURE OF THE LOWER RIGHT MOUNTING BOLT FOR AN UNKNOWN REASON, WHICH ALLOWED OVERLOAD FAILURE OF THE TWO REMAINING…

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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