# NTSB investigations: Grease

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 CEN23LA429](https://openairdocs.org/ntsb/CEN23LA429.md): Cirrus Design SR20 · Muncie, IN · Accident · No injuries · Class 3 · Limited · Final report · Jul 14, 2023 · N653GS · Substantial damage
  > A loss of directional control during the landing roll due to the left wheel seizing from insufficient grease in the left wheel bearing.
- [NTSB ANC15LA015](https://openairdocs.org/ntsb/ANC15LA015.md): Airbus AS350 B2 · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Mar 13, 2015 · N814EH · Substantial damage
  > The failure of the ball bearing within the pitch change spider assembly due to its operation with no grease within the bearing, which resulted in the subsequent fracture of the spider assembly and a loss of tail rotor control authority. Also causal to the…
- [NTSB ERA14LA272](https://openairdocs.org/ntsb/ERA14LA272.md): Landrum Kelly T Vans RV6 · Suffolk, VA · Accident · Minor injuries · Limited investigation · Final report · May 31, 2014 · N6RP · Substantial damage
  > The pilot/builder's decision to use a lubricant that was not designed for high-speed aviation applications, which resulted in the failure of the propeller needle thrust bearing due to the loss of lubrication from overheating, a total loss of aerodynamic…
- [NTSB WPR13LA132](https://openairdocs.org/ntsb/WPR13LA132.md): Cessna T310R · Casper, WY · Accident · No injuries · Limited investigation · Final report · Feb 17, 2013 · N4941J · Substantial damage
  > The separation of the right main gear bracket assembly from its wing attachment fitting due to lack of lubrication of the torque tube bearing.
- [NTSB ERA12IA097](https://openairdocs.org/ntsb/ERA12IA097.md): Cessna 560XL · Ocoee, FL · Incident · No injuries · Incident investigation · Final report · Dec 2, 2011 · N576CS · No damage
  > Water contamination in the pitch trim actuators.
- [NTSB CEN10LA302](https://openairdocs.org/ntsb/CEN10LA302.md): Beech C90 · Fort Worth, TX · Accident · No injuries · Limited investigation · Final report · Jun 3, 2010 · N20 · Substantial damage
  > The failure of the nose gear actuator due to insufficient lubrication of the nut assembly threads.

## 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01071035'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01071035/cases

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.