# Alternator-generator drive sys

- 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) › Alternator-generator drive sys
- NTSB code: 01022410
- Cases: 25
- In the probable cause: 22
- Fatal cases: 4
- All cases: https://openairdocs.org/ntsb-findings/01022410/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01022410/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01022410

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

- 2008: 1 / 1
- 2010: 1 / 2
- 2011: 1 / 1
- 2012: 1 / 1
- 2014: 2 / 2
- 2015: 1 / 1
- 2016: 3 / 3
- 2017: 2 / 2
- 2020: 2 / 2
- 2021: 2 / 3
- 2022: 1 / 2
- 2023: 2 / 2
- 2024: 2 / 2
- 2026: 1 / 1

## Defining events in these cases

- [Electrical system malf/failure](https://openairdocs.org/ntsb-events/332): 7 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 4 cases
- [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 2 cases
- [Abnormal runway contact](https://openairdocs.org/ntsb-events/090): 2 cases
- [VFR encounter with IMC](https://openairdocs.org/ntsb-events/401): 1 cases
- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 1 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 1 cases
- [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 1 cases
- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 1 cases
- [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 1 cases

## Aircraft models (registry)

- [Siai-Marchetti S.205/22R](https://openairdocs.org/model/siai-marchetti-s-205-22r): 1 cases
- [Piper PA-32R-301T](https://openairdocs.org/model/piper-pa-32r-301t): 1 cases
- [Piper PA-32R-300](https://openairdocs.org/model/piper-pa-32r-300): 1 cases
- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 1 cases
- [Piper PA-28RT-201T](https://openairdocs.org/model/piper-pa-28rt-201t): 1 cases
- [Piper PA-28-235](https://openairdocs.org/model/piper-pa-28-235): 1 cases
- [Piper PA-24-260](https://openairdocs.org/model/piper-pa-24-260): 1 cases
- [Mooney M20M](https://openairdocs.org/model/mooney-m20m): 1 cases
- [Mooney M20F](https://openairdocs.org/model/mooney-m20f): 1 cases
- [Cirrus Design SR22T](https://openairdocs.org/model/cirrus-design-sr22t): 1 cases

## Other findings in the same cases

- [Battery/charger](https://openairdocs.org/ntsb-findings/01022432) (Aircraft): 6 cases
- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 5 cases
- [Gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230) (Aircraft): 5 cases
- [Dark](https://openairdocs.org/ntsb-findings/03036020) (Environmental issues): 2 cases
- [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 2 cases
- [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 2 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 2 cases
- [Directional control](https://openairdocs.org/ntsb-findings/01062020) (Aircraft): 2 cases
- [Electrical pwr sys wiring](https://openairdocs.org/ntsb-findings/01022497) (Aircraft): 2 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 1 cases

## Newest cases

- [NTSB ERA26LA191](https://openairdocs.org/ntsb/ERA26LA191), Apr 24, 2026: Beech F33A (N85WM), Sanford, NC, substantial damage. Probable cause: A loss of electrical power as a result of broken stator leads within the alternator, which resulted in the pilot’s inability to extend the airplane’s landing gear.
- [NTSB CEN24LA308](https://openairdocs.org/ntsb/CEN24LA308), Aug 3, 2024: Cirrus Design SR22T (N825JC), Tulsa, OK, incident, substantial damage. Probable cause: The mechanic’s improper installation of the alternator wiring connections, which resulted in electrical arcing and thermal damage to the airplane.
- [NTSB CEN24LA185](https://openairdocs.org/ntsb/CEN24LA185), May 12, 2024: Titan T51 (N260Y), Novi, MI, substantial damage. Probable cause: A failure of the electrical system, resulting in a loss of fuel injection and subsequent loss of engine power.
- [NTSB CEN24LA060](https://openairdocs.org/ntsb/CEN24LA060), Dec 12, 2023: Piper PA-24-260 (N8729P), Anthony, KS, substantial damage. Probable cause: A failure of the airplane’s alternator, which resulted in a loss of electrical power, and the pilot’s failure to use the emergency gear extension procedure during the initial landing approach, which…
- [NTSB CEN23LA402](https://openairdocs.org/ntsb/CEN23LA402), Sep 4, 2023: Vans RV14 (N14NP), Orchard, TX, substantial damage. Probable cause: The failure of an alternator belt and the builder/previous owner’s incorrect electrical wiring of the airplane’s other alternator, which resulted in a total loss of electrical and engine power.
- [NTSB WPR22LA233](https://openairdocs.org/ntsb/WPR22LA233), Jun 27, 2022: GMK Ventures AL18 (N17GK), Moab, UT, substantial damage. Probable cause: The pilot’s failure to maintain directional control during a landing attempt, which resulted in a ground loop and collision with terrain. Contributing to the accident was the absence of an airspeed…
- [NTSB ERA22LA155](https://openairdocs.org/ntsb/ERA22LA155), Mar 13, 2022: Aircraft Designs Stallion (N262KT), Ridgeland, SC, substantial damage. Probable cause: A loss of sufficient electrical power to the engine’s electronic fuel injection/ignition system for undetermined reasons, which resulted in a total loss of engine power.
- [NTSB WPR22LA063](https://openairdocs.org/ntsb/WPR22LA063), Nov 28, 2021: Beech 200 (N71VT), Eugene, OR, substantial damage. Probable cause: The pilot’s improper checklist use, which resulted in an electrical malfunction and subsequent gear up landing.
- [NTSB WPR22FA021](https://openairdocs.org/ntsb/WPR22FA021), Oct 20, 2021: Cessna 150L (N5268Q), Dunsmuir, CA, substantial damage, 1 fatal. Probable cause: The non-certificated pilot’s improper decision to continue the flight under visual flight rules into instrument meteorological conditions which resulted in controlled flight into terrain.
- [NTSB CEN21LA373](https://openairdocs.org/ntsb/CEN21LA373), Jul 22, 2021: Mooney M20F (N6474Q), New Albany, MS, substantial damage. Probable cause: The pilot’s delayed decision to abort the landing that resulted in a collision with a fence post. Contributing to the accident was the failure of the alternator drive belt during cruise flight for…

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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