# NTSB investigations, 2020: Loss of engine power (partial)

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 1 of 2 · 72 cases

## Latest cases

- [NTSB WPR21LA069](https://openairdocs.org/ntsb/WPR21LA069.md): Cessna 172 · San Diego, CA · Accident · No injuries · Class 3 · Limited · Final report · Dec 13, 2020 · N5098E · Substantial damage
  > A partial loss of engine power due to the fatigue fracture of the No. 3 exhaust valve rocker arm stud.
- [NTSB CEN21LA078](https://openairdocs.org/ntsb/CEN21LA078.md): Vans RV4 · Sadler, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 7, 2020 · N423WH · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN21LA072](https://openairdocs.org/ntsb/CEN21LA072.md): Grumman G164 · Elton, LA · Accident · No injuries · Class 3 · Limited · Final report · Dec 1, 2020 · N48594 · Substantial damage
  > The loss of engine power, which resulted in a forced landing on unsuitable terrain. The reason for the loss of engine power could not be determined based on available evidence.
- [NTSB ERA21LA052](https://openairdocs.org/ntsb/ERA21LA052.md): Lancair Legacy FG · Hollywood, FL · Accident · 1 fatal · Class 3 · Limited · Final report · Nov 23, 2020 · N3UH · Substantial damage
  > The pilot/owner’s failure to properly reinstall the number 1 cylinder spark plug, which resulted in a partial loss of engine power during the initial climb. Contributing was the pilot's exceedance of the airplane’s critical angle of attack during an attempted…
- [NTSB WPR21LA071](https://openairdocs.org/ntsb/WPR21LA071.md): Co Z Cozy · Compton, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 17, 2020 · N82V · Substantial damage
  > The partial loss of engine power due to an improperly installed sparkplug.
- [NTSB WPR21LA052](https://openairdocs.org/ntsb/WPR21LA052.md): Bellanca 7GCBC · Fallbrook, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 11, 2020 · N57517 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined with the available evidence.
- [NTSB WPR21FA045](https://openairdocs.org/ntsb/WPR21FA045.md): Cessna 177 · Langley, WA · Accident · 2 fatal · Class 3 · Field · Final report · Nov 11, 2020 · N34633 · Substantial damage
  > The flight instructor’s failure to maintain airspeed, which resulted in an aerodynamic stall and subsequent loss of control while attempting to conduct an emergency landing. Contributing to the accident was a total loss of engine power as a result of…
- [NTSB CEN21LA048](https://openairdocs.org/ntsb/CEN21LA048.md): Piper PA-28-140 · Greenville, MI · Accident · No injuries · Class 3 · Limited · Final report · Nov 7, 2020 · N9993W · Substantial damage
  > The loss of engine power due to fuel starvation during a low approach over the airport, which resulted in a forced landing and impact with terrain.
- [NTSB CEN21LA047](https://openairdocs.org/ntsb/CEN21LA047.md): Ercoupe 415 · Ardmore, OK · Accident · Serious injuries · Class 3 · Limited · Final report · Nov 7, 2020 · N331BW · Substantial damage
  > The pilot’s improper decision to takeoff with 3 persons in a 2-place airplane and over maximum gross weight, and his failure to apply carburetor heat when the airplane’s engine experienced carburetor ice and a partial loss of power.
- [NTSB WPR21LA030](https://openairdocs.org/ntsb/WPR21LA030.md): Cessna 310 · Las Vegas, NV · Accident · 2 fatal · Class 3 · Limited · Final report · Oct 29, 2020 · N101G · Destroyed
  > The pilot’s failure to maintain the airplane’s minimum controllable airspeed while maneuvering with one engine inoperative. Also causal was the loss of power in the left engine due to oil starvation. Contributing to the accident were inadequate maintenance…
- [NTSB ANC21LA003](https://openairdocs.org/ntsb/ANC21LA003.md): Hughes 369 · Honolulu, HI · Accident · No injuries · Class 3 · Limited · Final report · Oct 27, 2020 · N58251 · Substantial damage
  > A partial loss of engine power due to an obstructed fuel line as a result of the separation of the circlip from the pin used on the fuel start pump. The reason for the circlip separation could not be determined based on the available evidence.
- [NTSB CEN21LA035](https://openairdocs.org/ntsb/CEN21LA035.md): Piper PA28 · Crystal Beach, TX · Accident · No injuries · Class 3 · Limited · Final report · Oct 26, 2020 · N32458 · Substantial damage
  > The partial loss of engine power for reasons that could not be determined.
- [NTSB ERA21LA030](https://openairdocs.org/ntsb/ERA21LA030.md): Grumman AA5 · Baxley, GA · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 25, 2020 · N920JL · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB ENG21WA004](https://openairdocs.org/ntsb/ENG21WA004.md): Airbus A320 · Brisbane, Australia · Incident · Class 5 · Foreign · Oct 23, 2020 · VH-VFF · No damage
- [NTSB WPR21LA020](https://openairdocs.org/ntsb/WPR21LA020.md): Piper PA-28-180 · Show Low, AZ · Accident · No injuries · Class 3 · Limited · Final report · Oct 21, 2020 · N7405W · Substantial damage
  > A partial loss of engine power due to the failure of the No. 4 cylinder exhaust valve.
- [NTSB WPR21LA017](https://openairdocs.org/ntsb/WPR21LA017.md): Piper PA28 · Puyallup, WA · Accident · No injuries · Class 3 · Limited · Final report · Oct 18, 2020 · N4673R · Substantial damage
  > A partial loss of engine power as a result of carburetor icing and the flight instructors failure to use carburetor heat.
- [NTSB ERA21LA019](https://openairdocs.org/ntsb/ERA21LA019.md): Piper PA32 · Atlanta, GA · Accident · No injuries · Class 3 · Limited · Final report · Oct 11, 2020 · N3595W · Substantial damage
  > A partial loss of engine power during takeoff due to a right magneto anomaly, which resulted in the pilot’s decision to abort the takeoff and the subsequent runway excursion.
- [NTSB CEN21LA001](https://openairdocs.org/ntsb/CEN21LA001.md): Cessna 210 · Cedaredge, CO · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 4, 2020 · N9568X · Destroyed
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN21LA002](https://openairdocs.org/ntsb/CEN21LA002.md): Cessna 182 · Byers, CO · Accident · No injuries · Class 3 · Limited · Final report · Oct 3, 2020 · N9901E · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB WPR21LA008](https://openairdocs.org/ntsb/WPR21LA008.md): Cessna 180 · Princeton, OR · Accident · No injuries · Class 3 · Limited · Final report · Oct 2, 2020 · N8678X · Substantial damage
  > The pilot’s failure to enrichen the mixture, which resulted in a partial loss of engine power.
- [NTSB ENG21WA002](https://openairdocs.org/ntsb/ENG21WA002.md): Airbus A330 · Nawabshah, Pakistan · Incident · Class 5 · Foreign · Oct 1, 2020 · AP-BNE · No damage
- [NTSB ERA20LA341](https://openairdocs.org/ntsb/ERA20LA341.md): Tecnam P92 · Centerville, MD · Accident · No injuries · Class 3 · Limited · Final report · Sep 28, 2020 · N562TU · Substantial damage
  > The fatigue failure of the No. 1 cylinder exhaust valve spring retainer due to air trapped in the lubrication system, which resulted in a total loss of engine power.
- [NTSB CEN20LA424](https://openairdocs.org/ntsb/CEN20LA424.md): Kitfox Speedster · Leadville, CO · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 24, 2020 · N525PP · Substantial damage
  > A partial loss of engine power due to fuel starvation as a result of the pilot’s improper maintenance.
- [NTSB ERA20LA326](https://openairdocs.org/ntsb/ERA20LA326.md): Stearman E75 · Honea Path, SC · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 21, 2020 · N1524M · Destroyed
  > The partial loss of engine power due to the fatigue failure of an engine cylinder and the pilot’s subsequent decision to overfly several suitable forced-landing sites while attempting to return to the departure airstrip.
- [NTSB CEN20LA403](https://openairdocs.org/ntsb/CEN20LA403.md): Cessna 177RG · Palatine, IL · Accident · No injuries · Class 3 · Limited · Final report · Sep 17, 2020 · N2699V · Substantial damage
  > The loss of partial engine power due to fuel starvation during departure which resulted in a forced landing and collision with a utility pole.
- [NTSB WPR20LA308](https://openairdocs.org/ntsb/WPR20LA308.md): Piper PA 30 · Billings, MT · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 12, 2020 · N7602Y · Substantial damage
  > The pilot’s improper fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB ERA20LA302](https://openairdocs.org/ntsb/ERA20LA302.md): Piper PA28R · Fletcher, NC · Accident · No injuries · Class 3 · Limited · Final report · Aug 27, 2020 · N9341N · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA361](https://openairdocs.org/ntsb/CEN20LA361.md): Cessna R182 · Crowley, LA · Accident · No injuries · Class 3 · Limited · Final report · Aug 24, 2020 · N639RR · Substantial damage
  > The failure of the No. 4 cylinder exhaust valve that resulted in a partial loss of engine power. Based on available evidence, the reason for the failed valve was not determined.
- [NTSB ERA20LA295](https://openairdocs.org/ntsb/ERA20LA295.md): Aeronca 11AC · Nebo, NC · Accident · No injuries · Class 3 · Limited · Final report · Aug 22, 2020 · N86002 · Substantial damage
  > A leak in the main fuel tank that resulted in a total loss of engine power due to fuel starvation.
- [NTSB ERA20LA290](https://openairdocs.org/ntsb/ERA20LA290.md): Piper PA32 · Tallahassee, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 19, 2020 · N4089R · Substantial damage
  > A partial loss of engine power on takeoff due to an intermittently blocked fuel injector on the number 3 cylinder.
- [NTSB ERA20LA287](https://openairdocs.org/ntsb/ERA20LA287.md): Piper PA34 · Groton, CT · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 18, 2020 · N41382 · Substantial damage
  > The reported partial loss of right engine power for reasons that could not be determined based on available evidence.
- [NTSB ERA20LA286](https://openairdocs.org/ntsb/ERA20LA286.md): Just JA 30 Superstol · Clover, SC · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 15, 2020 · N146BB · Substantial damage
  > The separation of a spark plug lead, resulting in a partial loss of engine power and collision with trees.
- [NTSB CEN20LA343](https://openairdocs.org/ntsb/CEN20LA343.md): Piper PA18 · Brandon, MN · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 15, 2020 · N2510H · Destroyed
  > The partial loss of engine power during takeoff due to carburetor icing.
- [NTSB WPR20LA258](https://openairdocs.org/ntsb/WPR20LA258.md): Cessna T210 · Hanna, UT · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 7, 2020 · N761RG · Substantial damage
  > The pilot’s failure to maintain sufficient airspeed after a partial loss of power for undetermined reasons, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall from which the pilot could not recover.
- [NTSB ERA20LA277](https://openairdocs.org/ntsb/ERA20LA277.md): Piper PA28 · St. Agatha, ME · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 5, 2020 · N7213W · Substantial damage
  > The failure of the crankshaft gear alignment dowel due to fatigue crack propagation and overstress, which resulted in a partial loss of engine power.
- [NTSB WPR20LA235](https://openairdocs.org/ntsb/WPR20LA235.md): Mcdonnell Douglas 600 · Thompson Falls, MT · Accident · No injuries · Class 3 · Limited · Final report · Jul 21, 2020 · N208MP · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA292](https://openairdocs.org/ntsb/CEN20LA292.md): Beech A23-24 · Burns Flat, OK · Accident · No injuries · Class 3 · Limited · Final report · Jul 19, 2020 · N3412C · Substantial damage
  > The mechanic’s improper maintenance when he reinstalled the fuel servo during the last annual inspection, which resulted in a loss of engine power during cruise flight when the throttle control rod-end disconnected from the fuel servo throttle linkage.
- [NTSB CEN20LA291](https://openairdocs.org/ntsb/CEN20LA291.md): Cessna 140 · Arlington, TX · Accident · No injuries · Class 3 · Limited · Final report · Jul 18, 2020 · N140AB · Substantial damage
  > The pilot's failure to maintain directional control during a forced landing with a quartering tailwind, following a partial loss of engine power due to carburetor icing.
- [NTSB WPR20LA225](https://openairdocs.org/ntsb/WPR20LA225.md): Vans RV 8 · Grimes, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 17, 2020 · N508CM · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because the airplane was not examined.
- [NTSB CEN20LA282](https://openairdocs.org/ntsb/CEN20LA282.md): Robinson R22 · Venice, LA · Accident · No injuries · Class 3 · Limited · Final report · Jul 8, 2020 · N7186K · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB WPR20LA212](https://openairdocs.org/ntsb/WPR20LA212.md): Cessna 172 · Lake Tahoe, CA · Accident · 2 fatal · Class 3 · Limited · Final report · Jul 7, 2020 · N6328D · Destroyed
  > The partial loss of engine power due to carbon buildup in the No. 4 cylinder resulting from the pilot’s inadequate mixture-leaning procedures.
- [NTSB CEN20LA262](https://openairdocs.org/ntsb/CEN20LA262.md): Beech F35 · Ravenna, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 5, 2020 · N4219B · Substantial damage
  > Electrical and engine problems for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA260](https://openairdocs.org/ntsb/CEN20LA260.md): Champion 7EC · Port O'Conner, TX · Accident · No injuries · Class 3 · Limited · Final report · Jul 3, 2020 · N9891B · Substantial damage
  > The loss of engine power due to a stuck intake valve.
- [NTSB CEN20LA286](https://openairdocs.org/ntsb/CEN20LA286.md): Robinson R44 · Welsh, LA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 2, 2020 · N7511D · Substantial damage
  > A partial loss of engine power while in flight due to corrosion of engine components, which resulted in a loss of control and a subsequent impact with terrain.
- [NTSB CEN20LA256](https://openairdocs.org/ntsb/CEN20LA256.md): Cessna 320 · Round Rock, TX · Accident · 1 fatal · Class 3 · Limited · Final report · Jul 1, 2020 · N19AS · Destroyed
  > Improper maintenance that led to a loss of engine power due to a failed left engine magneto, the pilot’s improper application of single engine emergency procedures, and his failure to maintain control of the airplane which resulted in a collision with trees.
- [NTSB ANC20WA101](https://openairdocs.org/ntsb/ANC20WA101.md): Bell 204 · Hyogo Prefecture, Japan · Accident · Class 4 · Foreign · Jun 29, 2020 · JA9383 · Substantial damage
- [NTSB CEN20LA239](https://openairdocs.org/ntsb/CEN20LA239.md): Cessna 150 · Millersport, OH · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 20, 2020 · N51033 · Destroyed
  > The loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN20LA234](https://openairdocs.org/ntsb/CEN20LA234.md): Air Tractor AT402 · Pine Bluff, AR · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 17, 2020 · N1532H · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack, which led to an aerodynamic stall and a loss of airplane control. Contributing was a partial loss of engine power for undetermined reasons.
- [NTSB ERA20LA213](https://openairdocs.org/ntsb/ERA20LA213.md): Vans RV8 · Hampton, GA · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 12, 2020 · N553KM · Substantial damage
  > The pilot’s excessive maneuvering at low altitude following a partial loss of engine power which resulted in an aerodynamic stall and collision with terrain.
- [NTSB CEN20LA219](https://openairdocs.org/ntsb/CEN20LA219.md): Flight Design Ctls · Beecher, IL · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 8, 2020 · N257V · Destroyed
  > The pilot’s decision to continue takeoff after a partial loss of engine power, and the pilot’s subsequent failure to control airplane pitch during a forced landing. Contributing to the accident was the partial loss of engine power for reasons that could not…

Next page: https://openairdocs.org/ntsb-events/342/sequence.md?year=2020&page=2

## 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 year(c."eventDate") = 2020
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '342' 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/342/sequence?year=2020

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