# NTSB investigations: AC generator-alternator 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 CEN24LA056](https://openairdocs.org/ntsb/CEN24LA056.md): Vans RV6 · Fordyce, AR · Accident · Minor injuries · Class 3 · Limited · Final report · Dec 5, 2023 · N600VS · Substantial damage > The pilot’s failure to attain a proper touchdown point following an unidentified electrical system failure and subsequent partial loss of engine power, which resulted in a runway overrun and impact with terrain. Contributing to the accident was the pilot’s… - [NTSB ERA23LA064](https://openairdocs.org/ntsb/ERA23LA064.md): Beech 95-B55 (T42A) · Athens, GA · Accident · No injuries · Class 3 · Limited · Final report · Nov 3, 2022 · N101DC · Substantial damage > The operator’s and the pilot’s continued operation of the airplane with a known electrical problem, resulting in a loss of electrical power and a gear-up landing. - [NTSB ERA18TA263](https://openairdocs.org/ntsb/ERA18TA263.md): Zenith CH 750 · DeLeon Springs, FL · Accident · Minor injuries · Final report · Sep 23, 2018 · N752VK · Substantial damage > The pilot's operation of the airplane with the alternator switch in the off position, which allowed the selected battery to discharge and resulted in an ignition system failure and a total loss of engine power. - [NTSB CEN18LA097](https://openairdocs.org/ntsb/CEN18LA097.md): Piper PA 24-260 · Fargo, ND · Accident · No injuries · Limited investigation · Final report · Feb 8, 2018 · N9360P · Substantial damage > The pilot's failure to use the published emergency procedures to manually extend the landing gear when an electrical failure precluded normal extension of the landing gear, resulting in the gear collapse during landing. Contributing to the accident was the… - [NTSB ERA16LA305](https://openairdocs.org/ntsb/ERA16LA305.md): Dayton A Babcock Storm · Eustis, FL · Accident · No injuries · Limited investigation · Final report · Aug 20, 2016 · N516VB · Substantial damage > The pilot's failure to maintain directional control during an aborted takeoff. Contributing to the accident were the loss of engine power due to a malfunctioning alternator, which precipitated the off-field landing, and the pilot’s decision to attempt to take… - [NTSB ERA14LA252](https://openairdocs.org/ntsb/ERA14LA252.md): Cessna 182 · Elkton, MD · Accident · No injuries · Limited investigation · Final report · May 21, 2014 · N182PJ · Substantial damage > The pilot’s failure to attain the proper touchdown point during a no-flap landing to a wet, down-sloping runway, and the airplane's dynamic hydroplaning after touchdown, which resulted in a runway overrun. Contributing to the accident was a total loss of… - [NTSB DCA14CA043](https://openairdocs.org/ntsb/DCA14CA043.md): General Atomics MQ-9 · Point Loma, CA · Accident · No injuries · Data collection · Final report · Jan 27, 2014 · CBP-159 · Destroyed > intentional controlled ditching of the aircraft due to failure of the starter/generator supplying electrical power to the aircraft. - [NTSB WPR13LA237](https://openairdocs.org/ntsb/WPR13LA237.md): Piper PA-32R-301T · Chandler, AZ · Accident · No injuries · Limited investigation · Final report · May 19, 2013 · N8197W · Substantial damage > The failure of the alternator and/or battery, which prevented the operation of the landing gear extension system and resulted in the nose landing gear collapsing during the landing roll. - [NTSB ERA12LA450](https://openairdocs.org/ntsb/ERA12LA450.md): Beech A36 · Johns Island, SC · Accident · No injuries · Limited investigation · Final report · Jul 9, 2012 · N6672B · Substantial damage > The pilot's failure to complete the manual emergency gear extension after a loss of electrical power. Contributing to the accident was the pilot's decision to delegate the landing gear extension to a non-pilot-rated passenger. - [NTSB CEN12FA251](https://openairdocs.org/ntsb/CEN12FA251.md): Cirrus Design SR22 · Newcomerstown, OH · Accident · 1 fatal · Field investigation · Final report · Apr 21, 2012 · N110EB · Substantial damage > The pilot’s loss of airplane control in instrument meteorological conditions due to his distraction by electrical system anomalies, which resulted in an uncontrolled descent. The reason for the electrical system anomalies could not be determined. - [NTSB CEN12LA220](https://openairdocs.org/ntsb/CEN12LA220.md): Cirrus Design SR22T · Addison, TX · Accident · No injuries · Limited investigation · Final report · Mar 23, 2012 · N229TX · Substantial damage > Maintenance personnel’s improper maintenance, which resulted in the incorrect wiring of the No. 1 alternator and a subsequent electrical system fire during taxi. Contributing to the accident was the airplane manufacturer's inadequate maintenance documentation… - [NTSB WPR12LA097](https://openairdocs.org/ntsb/WPR12LA097.md): Beech 58P · Santa Ana, CA · Accident · No injuries · Limited investigation · Final report · Jan 8, 2012 · N580TC · Substantial damage > The pilot’s failure to review or execute any applicable checklist procedures or troubleshoot or take corrective action before landing despite indications that the landing gear was not extended. Contributing to the accident were the pilot’s misunderstanding of… - [NTSB ERA11LA502](https://openairdocs.org/ntsb/ERA11LA502.md): Cessna P210N · South Deerfield, MA · Accident · Serious injuries · Limited investigation · Final report · Sep 23, 2011 · N210LE · Substantial damage > The failure of the electrical system due to an alternator failure during flight in instrument meteorological conditions, and the pilot’s inadequate preflight inspection and failure to use the approved checklist for the dual alternator system. Contributing to… - [NTSB ERA11CA255](https://openairdocs.org/ntsb/ERA11CA255.md): Beech F33A · Ocala, FL · Accident · No injuries · Data collection · Final report · Apr 21, 2011 · N334J · Substantial damage > The pilot's improper flare which resulted in a hard landing. Contributing to the accident was the pilot's distracted attention due to the electrical system failure. ## 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", '01022421')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-findings/01022421/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.