# NTSB investigations: Grumman Acft ENG Cor-Schweizer G-164B: Loss of engine power(partial) - mech failure/malf

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 SEA02LA121](https://openairdocs.org/ntsb/SEA02LA121.md): Grumman-Schweizer G-164B · Shelley, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 4, 2002 · N297AL · Destroyed
  > A loss of engine power due to the manufacturer's improperly machined threads, which prevented the cylinder base/head halves from being properly assembled, leading to fatigue propagation and the ultimate separation of the cylinder. A contributing factor was…
- [NTSB LAX01LA195](https://openairdocs.org/ntsb/LAX01LA195.md): Schweizer G-164B · Butte City, CA · Accident · Serious injuries · Limited investigation · Final report · May 31, 2001 · N6902K · Substantial damage
  > a fatigue failure of a propeller bolt.
- [NTSB FTW00LA239](https://openairdocs.org/ntsb/FTW00LA239.md): Grumman-Schweizer G-164B · Kaplan, LA · Accident · No injuries · Limited investigation · Final report · Aug 21, 2000 · N6506K · Substantial damage
  > the failure of the supercharger during takeoff. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB CHI99LA162](https://openairdocs.org/ntsb/CHI99LA162.md): Grumman-Schweizer G-164B · Buxton, ND · Accident · No injuries · Limited investigation · Final report · May 25, 1999 · N6524K · Substantial damage
  > the number one cylinder's separation, the pilot's visual lookout not possible through the oil given off by the number one cylinder, and the embankment. A factor in the accident was the oil.
- [NTSB MIA97LA190](https://openairdocs.org/ntsb/MIA97LA190.md): Schweizer G-164B · Edwards, MS · Accident · No injuries · Limited investigation · Final report · Jun 20, 1997 · N6816Q · Substantial damage
  > failure of the distributor drive gear in the right magneto, resulting in loss of engine power and a forced landing. The lack of suitable terrain for a forced landing was a related factor.
- [NTSB MIA94LA218](https://openairdocs.org/ntsb/MIA94LA218.md): Grumman G-164B · Greenwood, MS · Accident · No injuries · Limited investigation · Final report · Sep 29, 1994 · N48572 · Substantial damage
  > The improper decision of the pilot to execute a precautionary landing to an unprepared field due to a supercharger shaft failure.
- [NTSB CHI92DTG04](https://openairdocs.org/ntsb/CHI92DTG04.md): Grumman G-164B · Grandin, ND · Accident · No injuries · Final report · Aug 14, 1992 · N48687 · Substantial damage
  > The cracked cylinder which resulted in a forced landing. The lack of suitable terrain on which to make an emergency landing was a factor.
- [NTSB FTW90DRD05](https://openairdocs.org/ntsb/FTW90DRD05.md): Schweizer G-164B · Reeves, LA · Accident · No injuries · Final report · Apr 13, 1990 · N48455 · Substantial damage
  > Loss of engine power due to a frozen rocker arm.
- [NTSB FTW89DRA08](https://openairdocs.org/ntsb/FTW89DRA08.md): Grumman-Schweizer G-164B · Anahuac, TX · Accident · Minor injuries · Final report · Jul 18, 1989 · N6633Q · Destroyed
  > Failure of the supercharger bearing. The dirt bank was a contributing factor.
- [NTSB MKC88LA062](https://openairdocs.org/ntsb/MKC88LA062.md): Grumman G-164B · West Point, AR · Accident · No injuries · Limited investigation · Final report · Mar 15, 1988 · N6750Q · Substantial damage
  > The pilot said, shortly after takeoff, enroute to an aerial application operation, the engine began to lose pwr and began backfiring. He dumped a portion of his load, and made an emergency ldg in a soft, unplanted bean field. After rolling about 200 feet, the…
- [NTSB LAX87DVA12](https://openairdocs.org/ntsb/LAX87DVA12.md): Grumman G164B · Buttonwillow, CA · Accident · No injuries · Final report · Sep 22, 1987 · N6607Q · Substantial damage
  > During an aerial application flight, after pulling out of a pass over a field the plt heard a loud bang followed by severe engine vibration. The acft lost power and the pilot made a forced landing in a plowed field. During the landing roll the acft nosed…
- [NTSB FTW87DRA06](https://openairdocs.org/ntsb/FTW87DRA06.md): Grumman G-164B · Beaumont, TX · Accident · No injuries · Final report · Jul 11, 1987 · N6881K · Substantial damage
  > Drg the initial climb after takeoff, the eng began losing RPM & the plt was unable to return to the arpt. He selected a pasture area for an emerg landing, but the eng contd losing power. While landing on soft terrain with tall wet grass, the acft nosed over.…
- [NTSB FTW87DRA03](https://openairdocs.org/ntsb/FTW87DRA03.md): Grumman G-164B · Egypt, TX · Accident · No injuries · Final report · Jun 8, 1987 · N6667Q · Substantial damage
  > Acft experienced a power loss drng an aerial app maneuver. During the ensuing emerg lndg, the left wing struck high weeds on the shoulder of a road, veered left into a ditch, and flipped over. Investigation revealed no. 7 cylinder had a pre-existing crack in…
- [NTSB MKC87LA028](https://openairdocs.org/ntsb/MKC87LA028.md): Grumman-Schweizer G-164B-600 · Earle, AR · Accident · No injuries · Limited investigation · Final report · Dec 3, 1986 · N6898Q · Substantial damage
  > The pilot stated that the powerplant was performing normally during initial climb when, suddenly, the engine experienced a power loss after backfiring. Immediate remedial action resulted in a partial power output but not enough to sustain flight. Emergency…
- [NTSB FTW86LRD16](https://openairdocs.org/ntsb/FTW86LRD16.md): Grumman G-164B · Abbeville, LA · Accident · No injuries · Final report · Jun 17, 1986 · N48592 · Substantial damage
  > The pilot stated he made a successful forced landing, due to loss of power, and then had to flip the aircraft to prevent colliding with a lateral (above ground irrigation system) with a water depth of about four feet. Subsequent engine examination revealed…
- [NTSB MKC86LA086](https://openairdocs.org/ntsb/MKC86LA086.md): Grumman G164B · Advance, MO · Accident · No injuries · Limited investigation · Final report · Apr 12, 1986 · N6609Q · Substantial damage
  > The airplane was being operated as an agricultural aircraft when the engine started backfiring and then quit. During the forced landing in a plowed field, the airplane flipped forward to the inverted position. Investigation revealed the teeth on the left…
- [NTSB MKC84LA211](https://openairdocs.org/ntsb/MKC84LA211.md): Grumman G-164B · Roe, AR · Accident · No injuries · Limited investigation · Final report · Jul 17, 1984 · N8365K · Substantial damage
  > As a result of a supercharger failure, a partial power loss was experienced during a swath run. During the landing roll after a forced landing, the acft nosed over & came to rest inverted. An eng teardown revealed that both supercharger bearings had failed…
- [NTSB FTW83LA405](https://openairdocs.org/ntsb/FTW83LA405.md): Grumman G-164B · East Bernard, TX · Accident · Minor injuries · Limited investigation · Final report · Aug 31, 1983 · N48687 · Substantial damage
  > During takeoff, the eng had a partial loss of power after the acft lifted off. The plt reported that he dumped his load of defoliant, but the acft would not climb. Subsequently, it settled & collided with brush & trees. The plt attributed the power loss to a…
- [NTSB MIA83LA179](https://openairdocs.org/ntsb/MIA83LA179.md): Grumman G-164B · Altha, FL · Accident · No injuries · Limited investigation · Final report · Jul 1, 1983 · N6531K · Substantial damage
  > The plt stated that the eng began losing power during an aerial application mission. Subsequently, he landed in a muddy field & the acft nosed over. He stated that the indupartial loss of power.

## 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 ('3952802')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 352))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=3952802&occurrence=352

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