# NTSB investigations: Grumman G-164A: Nose over/nose down

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 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 CEN18LA152](https://openairdocs.org/ntsb/CEN18LA152.md): Grumman G 164A · Garwood, TX · Accident · No injuries · Limited investigation · Final report · Apr 27, 2018 · N6637 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ERA15LA314](https://openairdocs.org/ntsb/ERA15LA314.md): Grumman G164 · Trenton, NC · Accident · No injuries · Limited investigation · Final report · Aug 13, 2015 · N5277 · Substantial damage
  > The pilot's decision to land the airplane with a tailwind and his subsequent application of excessive braking, which resulted in a nose-over.
- [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 CEN15LA204](https://openairdocs.org/ntsb/CEN15LA204.md): Grumman G 164A · Maysville, OK · Accident · Minor injuries · Limited investigation · Final report · Apr 15, 2015 · N7951 · Substantial damage
  > The loss of engine power for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [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 WPR12CA242](https://openairdocs.org/ntsb/WPR12CA242.md): Grumman G-164A · Riverton, WY · Accident · No injuries · Data collection · Final report · Jun 3, 2012 · N5291 · Substantial damage
  > The pilot's loss of directional control during the landing roll and his deliberate application of excessive braking pressure, which resulted in a noseover.
- [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 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" = '096' 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/096/sequence?model=3952704

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