# NTSB investigations: Electrical system malf/failure

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.

Page 4 of 4 · 182 cases

## Cases, newest first

- [NTSB WPR11LA378](https://openairdocs.org/ntsb/WPR11LA378.md): Cessna 210L · Seattle, WA · Accident · No injuries · Limited investigation · Final report · Aug 13, 2011 · N732FY · Substantial damage
  > A loss of electrical power while on final approach due to a depleted battery, which resulted in an intentional gear-up emergency landing.
- [NTSB ERA11LA421](https://openairdocs.org/ntsb/ERA11LA421.md): Cessna 172S · Lincoln Park, NJ · Accident · No injuries · Limited investigation · Final report · Jul 23, 2011 · N869BC · Substantial damage
  > The pilot’s improper touchdown point, resulting in a runway overrun and collision with a guardrail.
- [NTSB WPR11FA248](https://openairdocs.org/ntsb/WPR11FA248.md): Piper PA-24-250 · Astoria, OR · Accident · 1 fatal · Field investigation · Final report · Jun 5, 2011 · N511FS · Substantial damage
  > The student pilot’s failure to maintain adequate airspeed while maneuvering for landing, which resulted in a stall/spin. Contributing to the accident were the pilot's distraction and anxiety from a reported failure of the airplane's electrical system.
- [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.
- [NTSB CEN11LA311](https://openairdocs.org/ntsb/CEN11LA311.md): Mooney M20K · New Orleans, LA · Accident · No injuries · Limited investigation · Final report · Apr 7, 2011 · N305M · Substantial damage
  > A loss of electrical and engine power for undetermined reasons.
- [NTSB DCA11IA040](https://openairdocs.org/ntsb/DCA11IA040.md): Airbus A320 · New Orleans, LA · Incident · No injuries · Incident investigation · Final report · Apr 4, 2011 · N409UA · Minor damage
  > the captain's failure to properly recognize and manage the abnormal condition, resulting in it escalating to an in-flight emergency.
- [NTSB CEN11LA186](https://openairdocs.org/ntsb/CEN11LA186.md): Gadbois Eugene W Apex CROSS-5 · Lago Vista, TX · Accident · Minor injuries · Limited investigation · Final report · Feb 11, 2011 · N751EW · Substantial damage
  > The simultaneous loss of engine and electrical power after takeoff for undetermined reasons.
- [NTSB CEN11WA159](https://openairdocs.org/ntsb/CEN11WA159.md): Beech B200 · Montpellier, France · Incident · Minor injuries · Foreign investigation · Jan 7, 2011 · F-GMPO · Minor damage
  > The accident investigation is under the jurisdiction and control of the French government. This report is for informational purposes only and contains only information released by or obtained from the French government or Bureau d’Enquêtes et d’Analyses.…
- [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 WPR10LA432](https://openairdocs.org/ntsb/WPR10LA432.md): Stinson JR. S · Lake Stevens, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 28, 2010 · N12164 · Substantial damage
  > A total loss of engine power during cruise flight, which resulted from a magneto switch failure.
- [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 WPR10CA215](https://openairdocs.org/ntsb/WPR10CA215.md): PZL-Swidnik PW-5 · Marana, AZ · Accident · No injuries · Data collection · Final report · Apr 26, 2010 · N500JN · Substantial damage
  > The pilot's inability to find thermal lift. Contributing to the accident was the failure of a computer that provided glide information and vertical speed instrumentation as a result of an improperly routed electrical cable that caused a short in the…
- [NTSB ERA10LA229](https://openairdocs.org/ntsb/ERA10LA229.md): Dalin Ronald K T-51 Mustang · Lakeland, FL · Accident · No injuries · Limited investigation · Final report · Apr 14, 2010 · N551RD · Substantial damage
  > The builder’s use of inadequate material for the exhaust manifold adapters resulting in heat damage and chafing of the crankshaft synchronizer and timing wires that rendered an inoperative ignition system and loss of engine power.
- [NTSB CEN10LA128](https://openairdocs.org/ntsb/CEN10LA128.md): Cessna 172RG · Lockhart, TX · Accident · No injuries · Limited investigation · Final report · Feb 21, 2010 · N5404V · Substantial damage
  > The flight instructor’s failure to use the emergency checklist, and his failure to extend the landing gear manually. Contributing to the accident was the electrical failure/malfunction for reasons undetermined.
- [NTSB DCA10WA095](https://openairdocs.org/ntsb/DCA10WA095.md): Boeing 757 · Las Palmas, Spain · Incident · No injuries · Foreign investigation · Feb 17, 2010 · G-BYAI · No damage
  > On February 17, 2010, at 1555 UTC, a Thompson Airways Boeing 757 experienced pilot and first officer airspeed indicator anomalies during climbout from Gran Canaria Airport (LPA), Las Palmas, Canary Islands, Spain. The event occurred during a period of…
- [NTSB WPR10LA091](https://openairdocs.org/ntsb/WPR10LA091.md): Beech A23-24 · Camas, WA · Accident · No injuries · Limited investigation · Final report · Dec 22, 2009 · N973WP · Substantial damage
  > The left magneto's broken p-lead, which led to the engine inadvertently starting while the pilot was turning the propeller by hand.
- [NTSB ERA10LA004](https://openairdocs.org/ntsb/ERA10LA004.md): Piper PA-32R-300 · Whiteville, NC · Accident · No injuries · Limited investigation · Final report · Oct 3, 2009 · N8809C · Substantial damage
  > The pilot's improper flare and subsequent hard landing during an intentional gear-up landing following multiple mechanical malfunctions. Also causal to the accident was an inoperative landing gear emergency-down valve which had blockage for undetermined…
- [NTSB ENG09IA016](https://openairdocs.org/ntsb/ENG09IA016.md): Boeing 767 432ER · St. Johns, Canada · Incident · No injuries · Incident investigation · Final report · Sep 8, 2009 · N840MH · Minor damage
  > Incorrect installation of a wire bundle, which contained wires for oxygen system, passenger address system and lavatory power, led to chafing of the wires on structure. The chafing eventually exposed the wire conductors and resulted in electrical arcing,…
- [NTSB WPR09LA423](https://openairdocs.org/ntsb/WPR09LA423.md): Cessna TU206G · Ballard, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 28, 2009 · N682RC · Substantial damage
  > The pilot's precautionary water landing with partially extended landing gear. Contributing to the accident was the unidentified anomaly with the airplane's electrical system, which rendered the gear position indicator system inoperative.
- [NTSB ERA09IA326](https://openairdocs.org/ntsb/ERA09IA326.md): Iniziative Sky Arrow · Marietta, GA · Incident · No injuries · Incident investigation · Final report · Jun 8, 2009 · N445SA · No damage
  > An electrical fire due to the lack of a positive locking mechanism for the fuse retainer in the main fuse block, which resulted in voltage fluctuations that caused thermal damage to the avionics cooling fan. Contributing to the incident was the student…
- [NTSB CEN09LA281](https://openairdocs.org/ntsb/CEN09LA281.md): Cessna 551 · Stillwater, OK · Accident · No injuries · Limited investigation · Final report · May 5, 2009 · N740JB · Substantial damage
  > The pilot's loss of control for undetermined reasons.
- [NTSB ERA09CA245](https://openairdocs.org/ntsb/ERA09CA245.md): Piper PA-18-150 · Tampa, FL · Accident · Minor injuries · Data collection · Final report · Apr 11, 2009 · N1982P · Substantial damage
  > The pilot's failure to confirm that the landing gear was retracted prior to the attempted water landing.
- [NTSB CEN09IA057](https://openairdocs.org/ntsb/CEN09IA057.md): Cessna T210N · Lubbock, TX · Incident · No injuries · Incident investigation · Final report · Nov 9, 2008 · N6267Y · Minor damage
  > An unidentified anomaly within the airplane's electrical system. Contributing to the incident was the pilot's failure to manually extend the landing gear.
- [NTSB WPR09FA027](https://openairdocs.org/ntsb/WPR09FA027.md): Cessna P206 · Estacada, OR · Accident · 2 fatal · Field investigation · Final report · Oct 29, 2008 · N2570X · Substantial damage
  > The pilot's failure to maintain clearance from trees while on approach to land at night. Contributing to the accident was the electrical system failure and the pilot's diverted attention.
- [NTSB CHI08IA292](https://openairdocs.org/ntsb/CHI08IA292.md): Boeing 757-223 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Sep 22, 2008 · N197AN · Minor damage
  > The failure of an electrical relay due to eroded contacts and the flight crew's decision to continue a flight that was operating on battery power.
- [NTSB NYC08FA292](https://openairdocs.org/ntsb/NYC08FA292.md): Steven A. Jones Lancair IV P · Stafford, VA · Accident · No injuries · Field investigation · Final report · Aug 11, 2008 · N731SJ · Substantial damage
  > The pilot's decision to install voltage regulators in the engine compartment where they were susceptible to water intrusion, which resulted in a malfunction of the standby electrical system's voltage regulator and a subsequent in-flight fire.
- [NTSB LAX08GA239](https://openairdocs.org/ntsb/LAX08GA239.md): Beech A200 · Salt Lake CIty, UT · Accident · No injuries · Final report · Jul 21, 2008 · N11 · Substantial damage
  > The failure of the landing gear motor (worn components) resulting in the partial collapse of the landing gear during landing. Contributing to the accident was the flight crew not following emergency checklist procedures to attempt a manual gear extension.
- [NTSB DCA08MA076](https://openairdocs.org/ntsb/DCA08MA076.md): Boeing 767 · San Francisco, CA · Accident · No injuries · Class 1 · Major · Final report · Jun 28, 2008 · N799AX · Destroyed
  > The design of the supplemental oxygen system hoses and the lack of positive separation between electrical wiring and electrically conductive oxygen system components. The lack of positive separation allowed a short circuit to breach a combustible oxygen hose,…
- [NTSB CHI08CA092](https://openairdocs.org/ntsb/CHI08CA092.md): Cessna 210N · Cincinnati, OH · Accident · No injuries · Data collection · Final report · Mar 20, 2008 · N4943U · Substantial damage
  > The pilot's decision to operate the airplane with a "dead" battery contrary to guidance provided by the Pilot's Operating Handbook. An additional cause was the pilot's failure to verify that the landing gear was fully down and locked prior to landing.…
- [NTSB DFW08CA079](https://openairdocs.org/ntsb/DFW08CA079.md): Willey Rotorway Exec 90 · Westport, OK · Accident · No injuries · Data collection · Final report · Mar 8, 2008 · N5251B · Substantial damage
  > An unsuccessful precautionary landing due to an electrical system malfunction.
- [NTSB DEN08LA057](https://openairdocs.org/ntsb/DEN08LA057.md): Beech A45 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Feb 12, 2008 · N34KF · Substantial damage
  > The pilot's improper decision to fly the airplane with a discharged battery, which resulted in a total electrical failure during takeoff climb. Contributing factors were the pilot's inability to verify the landing gear position, and the impact with the runway…
- [NTSB DCA08IA033](https://openairdocs.org/ntsb/DCA08IA033.md): Airbus A320 · Newark, NJ · Incident · No injuries · Incident investigation · Final report · Jan 25, 2008 · N462UA · No damage
  > a fault in the airplane's AC 1 electrical bus that caused a number of other electrical busses on the aircraft to lose power.

## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '332' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/332/sequence?page=4

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