# External power system

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Electrical power system](https://openairdocs.org/ntsb-findings/010224) › External power system
- NTSB code: 01022440
- Cases: 3
- In the probable cause: 2
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01022440/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01022440/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01022440

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

- 2009: 1 / 1
- 2023: 0 / 1
- 2026: 1 / 1

## Defining events in these cases

- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 1 cases
- [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 1 cases
- [Ground handling event](https://openairdocs.org/ntsb-events/080): 1 cases

## Aircraft models (registry)

- [Embraer ERJ 190-100 IGW](https://openairdocs.org/model/embraer-erj-190-100-igw): 1 cases
- [Bell 206L-3](https://openairdocs.org/model/bell-206l-3): 1 cases
- [Aerovodochody L-29 DELFIN](https://openairdocs.org/model/aerovodochody-l-29-delfin): 1 cases

## Other findings in the same cases

- [Availability of policy/proc](https://openairdocs.org/ntsb-findings/04021010) (Organizational issues): 1 cases
- [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 1 cases
- [Preflight inspection](https://openairdocs.org/ntsb-findings/02061510) (Personnel issues): 1 cases
- [Hydraulic, main system](https://openairdocs.org/ntsb-findings/01022910) (Aircraft): 1 cases

## Newest cases

- [NTSB WPR26LA343](https://openairdocs.org/ntsb/WPR26LA343), Sep 12, 2026: Aerovodochody L-29 Delfin (N29AD), Roswell, NM, substantial damage. Probable cause: The malfunction of a diode in the airplanes electrical system that resulted in low batter power and subsequent landing gear collapse.
- [NTSB DCA23LA191](https://openairdocs.org/ntsb/DCA23LA191), Feb 25, 2023: Embraer ERJ 190-100 IGW (N337JB), New York, NY, no damage. Probable cause: Electrical sparking caused by a faulty connection between the aircraft and ground power unit resulting in a serious injury to a ground service agent.
- [NTSB ERA09CA485](https://openairdocs.org/ntsb/ERA09CA485), Aug 26, 2009: Bell 206L-3 (N22ZA), White Plains, NY, substantial damage. Probable cause: The pilot's failure to disconnect the ground power unit prior to 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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