# Grease

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Fluids/misc hardware](https://openairdocs.org/ntsb-findings/0107) › [Fluids](https://openairdocs.org/ntsb-findings/010710) › Grease
- NTSB code: 01071035
- Cases: 6
- In the probable cause: 6
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01071035/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01071035/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01071035

## Cases per year (in the probable cause / all)

- 2010: 1 / 1
- 2011: 1 / 1
- 2013: 1 / 1
- 2014: 1 / 1
- 2015: 1 / 1
- 2023: 1 / 1

## Defining events in these cases

- [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 2 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 1 cases
- [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 1 cases
- [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 1 cases
- [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 1 cases

## Aircraft models (registry)

- [Cirrus Design SR20](https://openairdocs.org/model/cirrus-design-sr20): 1 cases
- [Cessna T310R](https://openairdocs.org/model/cessna-t310r): 1 cases
- [Landrum Kelly T VANS RV6](https://openairdocs.org/model/landrum-kelly-t-vans-rv6): 1 cases

## Other findings in the same cases

- [Oversight of maintenance](https://openairdocs.org/ntsb-findings/04032020) (Organizational issues): 1 cases
- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 1 cases
- [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 1 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 1 cases
- [Prop/rotor parameters](https://openairdocs.org/ntsb-findings/01062052) (Aircraft): 1 cases
- [Tail rotor control system](https://openairdocs.org/ntsb-findings/01046720) (Aircraft): 1 cases
- [Propeller hub section](https://openairdocs.org/ntsb-findings/01046114) (Aircraft): 1 cases
- [Landing gear actuator](https://openairdocs.org/ntsb-findings/01023233) (Aircraft): 1 cases
- [Gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230) (Aircraft): 1 cases
- [Elevator tab control system](https://openairdocs.org/ntsb-findings/01022731) (Aircraft): 1 cases

## Newest cases

- [NTSB CEN23LA429](https://openairdocs.org/ntsb/CEN23LA429), Jul 14, 2023: Cirrus Design SR20 (N653GS), Muncie, IN, substantial damage. Probable cause: 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), Mar 13, 2015: Airbus AS350 B2 (N814EH), Anchorage, AK, substantial damage. Probable cause: 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…
- [NTSB ERA14LA272](https://openairdocs.org/ntsb/ERA14LA272), May 31, 2014: Landrum Kelly T Vans RV6 (N6RP), Suffolk, VA, substantial damage. Probable cause: 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…
- [NTSB WPR13LA132](https://openairdocs.org/ntsb/WPR13LA132), Feb 17, 2013: Cessna T310R (N4941J), Casper, WY, substantial damage. Probable cause: 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), Dec 2, 2011: Cessna 560XL (N576CS), Ocoee, FL, incident, no damage. Probable cause: Water contamination in the pitch trim actuators.
- [NTSB CEN10LA302](https://openairdocs.org/ntsb/CEN10LA302), Jun 3, 2010: Beech C90 (N20), Fort Worth, TX, substantial damage. Probable cause: The failure of the nose gear actuator due to insufficient lubrication of the nut assembly threads.

NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted.

Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1).

NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names.

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