# NTSB investigations: Alternator-generator drive sys 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 ERA26LA191](https://openairdocs.org/ntsb/ERA26LA191.md): Beech F33A · Sanford, NC · Accident · No injuries · Class 4 · Limited · Final report · Apr 24, 2026 · N85WM · Substantial damage > 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.md): Cirrus Design SR22T · Tulsa, OK · Incident · No injuries · Class 3 · Limited · Final report · Aug 3, 2024 · N825JC · Substantial damage > 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.md): Titan T51 · Novi, MI · Accident · Serious injuries · Class 3 · Limited · Final report · May 12, 2024 · N260Y · Substantial damage > 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.md): Piper PA-24-260 · Anthony, KS · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 12, 2023 · N8729P · Substantial damage > 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 led to a gear-up landing. - [NTSB CEN23LA402](https://openairdocs.org/ntsb/CEN23LA402.md): Vans RV14 · Orchard, TX · Accident · No injuries · Class 3 · Limited · Final report · Sep 4, 2023 · N14NP · Substantial damage > 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.md): GMK Ventures AL18 · Moab, UT · Accident · No injuries · Class 4 · Limited · Final report · Jun 27, 2022 · N17GK · Substantial damage > 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 indicator due to an alternator failure. - [NTSB ERA22LA155](https://openairdocs.org/ntsb/ERA22LA155.md): Aircraft Designs Stallion · Ridgeland, SC · Accident · No injuries · Class 3 · Limited · Final report · Mar 13, 2022 · N262KT · Substantial damage > 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.md): Beech 200 · Eugene, OR · Accident · No injuries · Class 4 · Limited · Final report · Nov 28, 2021 · N71VT · Substantial damage > The pilot’s improper checklist use, which resulted in an electrical malfunction and subsequent gear up landing. - [NTSB WPR22FA021](https://openairdocs.org/ntsb/WPR22FA021.md): Cessna 150L · Dunsmuir, CA · Accident · 1 fatal · Class 3 · Field · Final report · Oct 20, 2021 · N5268Q · Substantial damage > 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.md): Mooney M20F · New Albany, MS · Accident · No injuries · Class 4 · Limited · Final report · Jul 22, 2021 · N6474Q · Substantial damage > 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 unknown reasons and the subsequent inoperative electrical… - [NTSB CEN21LA065](https://openairdocs.org/ntsb/CEN21LA065.md): Piper PA32R · Canon City, CO · Accident · No injuries · Class 3 · Limited · Final report · Nov 20, 2020 · N4187H · Substantial damage > The failure of the alternator drive belt, which resulted in insufficient electrical power to extend the landing gear and a subsequent gear-up landing.. - [NTSB CEN20LA179](https://openairdocs.org/ntsb/CEN20LA179.md): Cessna P210 · Burlington, WI · Accident · 1 fatal · Class 3 · Limited · Final report · May 15, 2020 · N1JA · Substantial damage > The pilot did not maintain a safe altitude during the visual approach, and subsequently lost control which resulted an impact with trees and terrain. - [NTSB WPR18LA030](https://openairdocs.org/ntsb/WPR18LA030.md): Vanderark RV-10 · Sun Lakes, AZ · Accident · No injuries · Limited investigation · Final report · Nov 12, 2017 · N917VA · Substantial damage > The fatigue fractures of the upper and lower alternator attachment bolts, which decreased the common drive belt tension and resulted in the subsequent in-flight separation of an alternator drive belt, the overheating of the engine, and the subsequent total… - [NTSB WPR17FA108](https://openairdocs.org/ntsb/WPR17FA108.md): Piper PA 30 · Haines, AK · Accident · 2 fatal · Field investigation · Final report · May 27, 2017 · N7376Y · Substantial damage > The pilot's decision to turn toward the inoperative engine after conducting a low-level pass, which resulted in an aerodynamic stall at too low an altitude to recover. Contributing to the accident was the pilot's decision to perform the flight and the engine… - [NTSB ANC17LA014](https://openairdocs.org/ntsb/ANC17LA014.md): Piper PA 32R-300 · McGrath, AK · Accident · Serious injuries · Limited investigation · Final report · Nov 21, 2016 · N4352F · Minor damage > The failure of the nose landing gear to extend and lock due to the failure of the alternator and reduced battery power due to the cold ambient temperature, which prohibited the electrically-driven hydraulic pump from supplying adequate hydraulic pressure to… - [NTSB ERA16LA162](https://openairdocs.org/ntsb/ERA16LA162.md): Costruzioni Aeronautiche Tecna P2008 · Burgaw, NC · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 16, 2016 · N588TA · Substantial damage > The pilot’s failure to activate the airplane’s alternator, which resulted in an eventual loss of electrical power to the engine’s fuel pumps, fuel starvation, and a total loss of engine power. Contributing was the pilot’s use of an incomplete checklist. - [NTSB ERA16LA135](https://openairdocs.org/ntsb/ERA16LA135.md): Cessna 210L · Myrtle Beach, SC · Accident · No injuries · Limited investigation · Final report · Mar 19, 2016 · N59196 · Substantial damage > A complete loss of electrical power, which resulted from the separation of an alternator wire due to corrosion. Contributing to the accident was the failure of the emergency landing gear extension system due to a lack of hydraulic fluid, which resulted in… - [NTSB ERA15FA254](https://openairdocs.org/ntsb/ERA15FA254.md): Beech A36 · Plainville, MA · Accident · 3 fatal · Field investigation · Final report · Jun 28, 2015 · N5626D · Destroyed > The total loss of engine power due to the failure of the alternator drive coupling. Contributing to the accident was the pilot's inability to locate and navigate to a suitable forced landing site due to low cloud ceilings. - [NTSB ENG14IA019](https://openairdocs.org/ntsb/ENG14IA019.md): Boeing 767 332 · Los Angeles, CA · Incident · No injuries · Incident investigation · Final report · Jul 11, 2014 · N139DL · Minor damage > The combination of fuel leaking from the integrated drive generator (IDG) fuel/oil heat exchanger and the coincident arcing of the IDG power feeder cables that ignited the leaking fuel. Contributing to the ignition of the fuel was the misrouting of the IDG… - [NTSB ERA14LA244](https://openairdocs.org/ntsb/ERA14LA244.md): Piper PA-28-235 · Brooksville, FL · Accident · No injuries · Limited investigation · Final report · May 9, 2014 · N8683W · Substantial damage > The pilot’s loss of directional control while landing at night, which resulted in a runway excursion and collision with airport signage. Contributing to the accident was the total loss of electrical power, which necessitated the pilot having to land without… - [NTSB WPR12LA402](https://openairdocs.org/ntsb/WPR12LA402.md): Hansen HANSEN-VANS RV-6 · Lemolo Lake, OR · Accident · Serious injuries · Limited investigation · Final report · Sep 5, 2012 · N53MH · Substantial damage > An overvoltage event due to the failure of the automotive voltage regulator, which resulted in electrical anomalies and smoke in the cockpit and a subsequent forced off-airport landing. - [NTSB ERA12LA071](https://openairdocs.org/ntsb/ERA12LA071.md): Siai-Marchetti S205-22R · Okeechobee, FL · Accident · No injuries · Limited investigation · Final report · Nov 5, 2011 · N729WA · Substantial damage > A partial loss of engine power due to a failure of the drive bearings in the alternator drive system. Contributing to the accident was the inadequate maintenance. - [NTSB CEN11CA103](https://openairdocs.org/ntsb/CEN11CA103.md): Piper PA-28RT-201T · Spring, TX · Accident · No injuries · Data collection · Final report · Nov 18, 2010 · N8320H · Substantial damage > The failure of the right landing gear down-lock mechanism to fully engage. Contributing to the accident was the pilot’s inability to verify the landing gear extension due to the inoperative alternator. - [NTSB ERA10CA412](https://openairdocs.org/ntsb/ERA10CA412.md): Mooney M20M · Poughkeepsie, NY · Accident · No injuries · Data collection · Final report · Aug 9, 2010 · N9153Z · Substantial damage > The pilot's improper flare which resulted in a hard landing, loss of directional control and runway excursion. - [NTSB LAX08IA093](https://openairdocs.org/ntsb/LAX08IA093.md): Bennett Lancair 320 · Hillsboro, OR · Incident · No injuries · Incident investigation · Final report · Apr 2, 2008 · N456 · Minor damage > The malfunction of the airplane's battery and alternator that resulted in the failure of the landing gear to extend and lock in place. ## 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", '01022410')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-findings/01022410/cases --- 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.