# NTSB investigations: Grumman G-164A: Off-field or emergency landing

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB CEN25LA160](https://openairdocs.org/ntsb/CEN25LA160.md): Grumman G164 · Louise, TX · Accident · No injuries · Class 4 · Limited · Final report · Apr 18, 2025 · N5416 · Substantial damage
  > The reported loss of engine power for undetermined reasons.
- [NTSB CEN24LA364](https://openairdocs.org/ntsb/CEN24LA364.md): Grumman G-164A · LaPlace, LA · Accident · No injuries · Class 4 · Limited · Final report · Sep 21, 2024 · N6565 · Substantial damage
  > Total loss of engine power during the agricultural application flight for reasons that could not be determined.
- [NTSB CEN18LA357](https://openairdocs.org/ntsb/CEN18LA357.md): Grumman G164 · Opelousas, LA · Accident · No injuries · Limited investigation · Final report · Aug 29, 2018 · N956X · Substantial damage
  > The loss of two securing bolts that allowed the left magneto to move around, which disrupted the spark timing and resulted in the engine losing total power.
- [NTSB CEN15LA330](https://openairdocs.org/ntsb/CEN15LA330.md): Grumman G-164A · Emmett, KS · Accident · Minor injuries · Limited investigation · Final report · Jul 31, 2015 · N963X · Substantial damage
  > The engine failure due to several loose, damaged cylinder stud nuts and hold-down bolts. Contributing to the accident was maintenance personnel’s failure to detect that the cylinder nuts and hold-down bolts were not properly secured during the engine’s most…
- [NTSB CEN13LA443](https://openairdocs.org/ntsb/CEN13LA443.md): Grumman G-164A · Monte Vista, CO · Accident · No injuries · Limited investigation · Final report · Jul 29, 2013 · N5324 · Substantial damage
  > The partial loss of engine power due to a fatigue failure of the engine cylinder exhaust rocker housing as a result of an excessively torqued rocker assembly.
- [NTSB CEN11LA556](https://openairdocs.org/ntsb/CEN11LA556.md): Grumman G-164A · El Campo, TX · Accident · No injuries · Limited investigation · Final report · Aug 18, 2011 · N6567 · Substantial damage
  > Separation of the No. 3 cylinder exhaust valve rocker arm, which resulted in a loss of engine power.
- [NTSB ERA11LA290](https://openairdocs.org/ntsb/ERA11LA290.md): Grumman G-164A · Albion, NY · Accident · No injuries · Limited investigation · Final report · Apr 29, 2011 · N896X · Substantial damage
  > A bearing failure in the engine’s supercharger section, which resulted in a total loss of engine power during flight. Contributing to the accident was the soft soil of the forced landing site.
- [NTSB WPR09LA373](https://openairdocs.org/ntsb/WPR09LA373.md): Grumman G164 · Riverdale, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 28, 2009 · N8741H · Substantial damage
  > The partial loss of engine power due to the failure of the engine's supercharger-blower.
- [NTSB CHI08CA242](https://openairdocs.org/ntsb/CHI08CA242.md): Schweizer G-164A · Jefferson, IA · Accident · No injuries · Data collection · Final report · Aug 8, 2008 · N73PB · Substantial damage
  > The loss of engine power for an undetermined reason and the unsuitable terrain encountered during the forced landing. The corn crop was a factor.
- [NTSB CHI08CA217](https://openairdocs.org/ntsb/CHI08CA217.md): Grumman G-164A · Veedersburg, IN · Accident · No injuries · Data collection · Final report · Jul 28, 2008 · N9892 · Substantial damage
  > The oil filler cap not reinstalled by the pilot prior to the aerial application flight and the total loss of engine oil during an aerial application. Additional causes were the low altitude of the operation and the unsuitable terrain encountered by the pilot…
- [NTSB DFW08CA192](https://openairdocs.org/ntsb/DFW08CA192.md): Grumman G-164A · Bovina, TX · Accident · No injuries · Data collection · Final report · Jul 18, 2008 · N7832 · Substantial damage
  > Loss of engine power for undetermined reasons.
- [NTSB NYC08LA245](https://openairdocs.org/ntsb/NYC08LA245.md): Grumman G-164A · Pelham, GA · Accident · 1 fatal · Limited investigation · Final report · Jul 12, 2008 · N7395 · Substantial damage
  > A partial loss of engine power for undetermined reasons which led to a forced landing in unsuitable terrain.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('3952704')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '440' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/440/sequence?model=3952704

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