# Autopilot trim servo

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Auto flight system](https://openairdocs.org/ntsb-findings/010222) › Autopilot trim servo
- NTSB code: 01022216
- Cases: 3
- In the probable cause: 3
- Fatal cases: 2
- All cases: https://openairdocs.org/ntsb-findings/01022216/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01022216/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01022216

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

- 2008: 1 / 1
- 2018: 1 / 1
- 2019: 1 / 1

## Defining events in these cases

- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 2 cases
- [Runway excursion](https://openairdocs.org/ntsb-events/300): 1 cases

## Aircraft models (registry)

- [Rockwell International 112TCA](https://openairdocs.org/model/rockwell-international-112tca): 1 cases
- [Beech E-55](https://openairdocs.org/model/beech-e-55): 1 cases
- [Joseph W Blandford LEGACY RG](https://openairdocs.org/model/joseph-w-blandford-legacy-rg): 1 cases

## Other findings in the same cases

- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 2 cases
- [Dark](https://openairdocs.org/ntsb-findings/03036020) (Environmental issues): 1 cases
- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 1 cases
- [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 1 cases
- [Repair](https://openairdocs.org/ntsb-findings/02062015) (Personnel issues): 1 cases
- [Identification/recognition](https://openairdocs.org/ntsb-findings/02041510) (Personnel issues): 1 cases
- [Monitoring other person](https://openairdocs.org/ntsb-findings/02021535) (Personnel issues): 1 cases
- [Descent/approach/glide path](https://openairdocs.org/ntsb-findings/01062040) (Aircraft): 1 cases
- [Auto flight system, general](https://openairdocs.org/ntsb-findings/01022200) (Aircraft): 1 cases

## Newest cases

- [NTSB ERA19FA201](https://openairdocs.org/ntsb/ERA19FA201), Jun 27, 2019: Beech E55 (N664AR), Hope Mills, NC, destroyed, 2 fatal. Probable cause: The pilot's failure to disengage an uncommanded nose-down pitch input. Contributing to the accident was improper maintenance of the pitch trim servo, which would have precluded a physical override of…
- [NTSB ERA19FA049](https://openairdocs.org/ntsb/ERA19FA049), Nov 17, 2018: Lancair Legacy RG (N8448J), Gainesville, GA, substantial damage, 1 fatal. Probable cause: The pilots’ failure to execute a go-around when the nighttime autopilot-coupled approach became unstable, which resulted in a loss of control and subsequent impact with terrain. Also causal was the…
- [NTSB NYC08LA124](https://openairdocs.org/ntsb/NYC08LA124), Mar 6, 2008: Rockwell 112TCA (N4623W), West Chester, PA, substantial damage. Probable cause: The pilot's failure to ensure that the pitch trim was properly set for takeoff.

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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