# Final NTSB investigations: Powerplant sys/comp malf/fail

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 2 of 13 · 604 cases

## Cases, newest first

- [NTSB ERA24FA078](https://openairdocs.org/ntsb/ERA24FA078.md): Piper PA46R-350T · Mooresville, NC · Accident · 1 fatal · Class 3 · Field · Final report · Dec 31, 2023 · N539MA · Substantial damage
  > A missing induction clamp, which allowed the induction hose to the left side intercooler to become disconnected, resulting in a total loss of engine power due to an overly rich fuel/air mixture.
- [NTSB WPR24LA064](https://openairdocs.org/ntsb/WPR24LA064.md): Diamond Aircraft Ind DA 40 · Spanish Fork, UT · Accident · No injuries · Class 3 · Limited · Final report · Dec 21, 2023 · N453DS · Substantial damage
  > Maintenance personnel’s improper installation of the left magneto, which resulted in oil starvation to the engine and a subsequent total loss of engine power.
- [NTSB ERA24LA066](https://openairdocs.org/ntsb/ERA24LA066.md): Diamond Aircraft Ind DA 40 NG · Asheville, NC · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 15, 2023 · N907L · Substantial damage
  > Fatigue failure of the No. 4 inner main bearing cap screw and connecting rod bolts, which resulted in a total loss of engine power. Contributing to the failure were the low material strength of the inner main bearing cap screw and the increased loads on the…
- [NTSB CEN24LA063](https://openairdocs.org/ntsb/CEN24LA063.md): Cessna T210 · Sapulpa, OK · Accident · No injuries · Class 3 · Limited · Final report · Dec 13, 2023 · N6789R · Substantial damage
  > The total loss of engine power due to the failure of the left magneto and subsequent damage to a lead for the right magneto.
- [NTSB WPR24FA054](https://openairdocs.org/ntsb/WPR24FA054.md): Beech A36 · Topock, AZ · Accident · 1 fatal · Class 3 · Field · Final report · Dec 10, 2023 · N4171S · Substantial damage
  > The failure of the No. 4 connecting rod due to oil starvation, which resulted in a loss of engine power, inflight fire, and a subsequent off-airport emergency landing on rough desert terrain. Contributing to the accident was the pilot’s decision to attempt a…
- [NTSB WPR24FA053](https://openairdocs.org/ntsb/WPR24FA053.md): Beauchamp Norm Kitfox · Eloy, AZ · Accident · 1 fatal · Class 3 · Field · Final report · Dec 8, 2023 · N66180 · Destroyed
  > The separation of a propeller blade during the initial climb due to insufficient blade retention forces. Contributing to the accident was the propeller blade retention design, manufacturing defects that prevented the propeller from achieving adequate grip…
- [NTSB CEN24LA061](https://openairdocs.org/ntsb/CEN24LA061.md): Cessna 421C · McGregor, TX · Accident · No injuries · Class 3 · Limited · Final report · Dec 8, 2023 · N146TJ · Substantial damage
  > The failure of the spring pin in the right propeller governor, which precluded the pilot from controlling the propeller pitch to maintain engine rpm, resulting in a loss of engine thrust, excessive drag, and the subsequent forced landing to a field.
- [NTSB ERA24FA050](https://openairdocs.org/ntsb/ERA24FA050.md): Piper PA32R · Attalla, AL · Accident · 1 fatal · Class 3 · Field · Final report · Nov 27, 2023 · N4187Q · Destroyed
  > The undetected wear of both pawl retaining rivets of the left magneto impulse coupling and fatigue failure of one pawl retaining rivet, which led to cascading fractures of the second pawl retaining rivet, left gear retainer assembly, and gear teeth of…
- [NTSB ERA24LA040](https://openairdocs.org/ntsb/ERA24LA040.md): Bell Andy Skyraider II · Limington, ME · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 16, 2023 · N90AB · Substantial damage
  > The failure of the fuel pump to adequately supply fuel to the engine due to significant corrosion.
- [NTSB CEN24LA038](https://openairdocs.org/ntsb/CEN24LA038.md): Bede BD-4 · Lowell, IN · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 14, 2023 · N931AS · Substantial damage
  > Fatigue cracking of the propeller blade root, which resulted in the in-flight separation of the propeller blade from its root. Contributing to the accident was the improper machining of the blade root threads, which resulted in chatter/ratchet marks that…
- [NTSB WPR24LA034](https://openairdocs.org/ntsb/WPR24LA034.md): Cessna 310 · Hayden, ID · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 13, 2023 · N86H · Substantial damage
  > The pilot’s failure to maintain adequate airspeed and his exceedance of the airplane’s critical angle of attack, which resulted in a loss of control and subsequent stall during a precautionary landing. Contributing to the accident was the improper maintenance…
- [NTSB CEN24LA036](https://openairdocs.org/ntsb/CEN24LA036.md): Textron 172S · Erie, CO · Accident · No injuries · Class 3 · Limited · Final report · Nov 9, 2023 · N1817E · Substantial damage
  > A partial loss of engine power while maneuvering at a low altitude due to a stuck exhaust valve.
- [NTSB CEN24LA027](https://openairdocs.org/ntsb/CEN24LA027.md): Robinson Helicopter R44 · Rowlett, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 26, 2023 · N141CD · Substantial damage
  > A malfunction of the helicopter’s Engine Monitoring Unit (EMU)/Governor Controller for undetermined reasons. Contributing to the accident was the flight instructor’s failure to turn off the EMU/Governor Controller per the emergency checklist when the…
- [NTSB ERA24LA016](https://openairdocs.org/ntsb/ERA24LA016.md): Cessna 172L · Richmond, VA · Accident · No injuries · Class 3 · Limited · Final report · Oct 21, 2023 · N7716G · Substantial damage
  > The loss of engine power due to a restriction of fuel flow as a result of a fractured float bracket in the carburetor.
- [NTSB ENG24FA003](https://openairdocs.org/ntsb/ENG24FA003.md): Boeing 767-300F · Memphis, TN · Incident · No injuries · Class 3 · Field · Final report · Oct 18, 2023 · N287FE · Minor damage
  > A high-pressure fuel leak from a gap in the bolted flange interface between the main fuel pump’s fuel crossover supply tube and the hydromechanical unit idler adapter pad, which resulted in the crossover tube flange bolts partially pulling out and allowing…
- [NTSB CEN24LA012](https://openairdocs.org/ntsb/CEN24LA012.md): Tvap 4 · Franksville, WI · Accident · No injuries · Class 3 · Limited · Final report · Oct 15, 2023 · N42VZ · Substantial damage
  > The improper installation of the supplemental ignition system, which resulted in a total loss of engine power.
- [NTSB CEN24LA011](https://openairdocs.org/ntsb/CEN24LA011.md): Cirrus SR22 · Red Oak, IA · Accident · No injuries · Class 3 · Limited · Final report · Oct 15, 2023 · N6JA · Substantial damage
  > The fatigue failure of the exhaust valve due to excessive combustion deposits, which resulted in a partial loss of engine power. Contributing to the accident was the pilot’s failure to ensure that the required scheduled maintenance was completed.
- [NTSB WPR23LA352](https://openairdocs.org/ntsb/WPR23LA352.md): Wayne Toddun Sling 4 TSI · San Pedro, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 25, 2023 · N135WT · Substantial damage
  > A total loss of engine power due to a failure of the No. 4 cylinder exhaust valve from overheating and excessive wear.
- [NTSB CEN23LA370](https://openairdocs.org/ntsb/CEN23LA370.md): Piper PA31 · Durant, OK · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2023 · N3589X · Substantial damage
  > The loosening of a connecting rod cap nut for reasons that could not be determined, which resulted in a mechanical failure of the engine and an in-flight fire.
- [NTSB CEN23LA327](https://openairdocs.org/ntsb/CEN23LA327.md): Vans RV10 · Chouteau, OK · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 21, 2023 · N730WL · Substantial damage
  > The total loss of engine power as a result of a failed positive crankcase ventilation (PCV) valve and a subsequent impact with terrain.
- [NTSB ERA23LA293](https://openairdocs.org/ntsb/ERA23LA293.md): Hughes 369D · Waldorf, MD · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 9, 2023 · N5027P · Substantial damage
  > Fatigue failure of the overrunning clutch outer race and a subsequent inflight loss of power due to abnormal bending loads as a result of improper reassembly of the clutch subassembly following maintenance and the presence of microcracks on the clutch’s outer…
- [NTSB ERA23LA286](https://openairdocs.org/ntsb/ERA23LA286.md): Grumman American Avn. AA5A · Redstone Arsenal, AL · Accident · No injuries · Class 3 · Limited · Final report · Jul 4, 2023 · N26387 · Substantial damage
  > The separation of the clamp assembly securing the throttle control cable outer housing, which resulted in the pilot’s inability to control the throttle.
- [NTSB CEN23LA250](https://openairdocs.org/ntsb/CEN23LA250.md): Champion 7EC · Waunakee, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 21, 2023 · N80461 · Substantial damage
  > A total loss of engine power during the initial takeoff climb due to a worn manual fuel primer pump locking mechanism, which resulted in an unlocked primer and an overly rich fuel mixture.
- [NTSB CEN23LA246](https://openairdocs.org/ntsb/CEN23LA246.md): Piper PA46 · College Station, TX · Accident · No injuries · Class 3 · Limited · Final report · Jun 18, 2023 · N463HP · Substantial damage
  > The mechanic’s failure to properly secure the oil suction screen plug during recent maintenance, which resulted in an oil leak and subsequent loss of engine power due to oil starvation.
- [NTSB ENG23LA030](https://openairdocs.org/ntsb/ENG23LA030.md): Gulfstream Aerospace G-IV · Sioux City, IA · Incident · No injuries · Class 3 · Limited · Final report · Jun 17, 2023 · N926TT · Minor damage
  > A No. 2 (right) engine failure due to a spinner fairing separation and subsequent impact with the fan blades that resulted in a midspan fracture of one fan blade. The spinner fairing separated as a result of a fatigue crack that originated from the heat…
- [NTSB WPR23LA218](https://openairdocs.org/ntsb/WPR23LA218.md): Cessna A188B · Chillicothe, MO · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 7, 2023 · N731UF · Destroyed
  > A partial loss of engine power due to a tear in the fuel manifold diaphragm, which prevented sufficient fuel flow to the engine.
- [NTSB CEN23LA231](https://openairdocs.org/ntsb/CEN23LA231.md): Cessna 207 · Harlingen, TX · Accident · No injuries · Class 3 · Limited · Final report · Jun 6, 2023 · N91157 · Substantial damage
  > The improper installation of the throttle control arm to the throttle control cable attachment end, which resulted in a failure of the control arm and a loss of engine power in flight.
- [NTSB WPR23LA215](https://openairdocs.org/ntsb/WPR23LA215.md): Piper J3C-65 · Belfair, WA · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 4, 2023 · N77583 · Substantial damage
  > The total loss of engine power due to the fatigue failure of the crankshaft accessory drive gear.
- [NTSB WPR23LA199](https://openairdocs.org/ntsb/WPR23LA199.md): Cessna 172S · Casa Grande, AZ · Accident · No injuries · Class 3 · Limited · Final report · May 24, 2023 · N60372 · Substantial damage
  > An in-flight separation of the throttle linkage, which resulted in a loss of throttle control. Contributing to the accident was maintenance personnel’s failure to follow the maintenance manual inspection procedure for the throttle cable assembly.
- [NTSB ERA23FA238](https://openairdocs.org/ntsb/ERA23FA238.md): Beech V35 · Rougemont, NC · Accident · 1 fatal · Class 3 · Field · Final report · May 21, 2023 · N272S · Destroyed
  > A total loss of engine power due to oil starvation. The source of the oil starvation could not be determined.
- [NTSB WPR23LA197](https://openairdocs.org/ntsb/WPR23LA197.md): Cessna 210 · Redding, CA · Accident · Minor injuries · Class 3 · Limited · Final report · May 20, 2023 · N9433T · Substantial damage
  > A fuel leak caused by an age-degraded fuel pressure sender hose, which resulted in fuel starvation and a loss of engine power. Contributing to the accident was inadequate maintenance.
- [NTSB CEN23LA188](https://openairdocs.org/ntsb/CEN23LA188.md): Cessna 172 · Flower Mound, TX · Accident · No injuries · Class 3 · Limited · Final report · May 17, 2023 · N5550J · Substantial damage
  > The fatigue failure of the rocker arm which resulted in a partial loss of engine power. Contributing was the airplane operator’s failure to inspect the rocker arm in accordance with the engine manufacturer’s service bulletin.
- [NTSB ERA23LA231](https://openairdocs.org/ntsb/ERA23LA231.md): Charles D Walker Walker Curtiss JN4D · Greenville, KY · Accident · No injuries · Class 3 · Limited · Final report · May 15, 2023 · N8262 · Substantial damage
  > The separation of an electrical wire that powered the ignition module, rendering the ignition system inoperative, and resulting in the total loss of engine power.
- [NTSB CEN23LA218](https://openairdocs.org/ntsb/CEN23LA218.md): Piper J3C · Romeoville, IL · Incident · No injuries · Class 3 · Limited · Final report · Apr 27, 2023 · N6384H · Minor damage
  > The inflight failure of the propeller blade due to fatigue cracking from corrosion pits, initiating at the midpoint of the cambered face.
- [NTSB CEN23LA165](https://openairdocs.org/ntsb/CEN23LA165.md): Pipistrel Lsa Sinus · Kingsford, MI · Accident · No injuries · Class 3 · Limited · Final report · Apr 13, 2023 · N413EK · Substantial damage
  > The failure of maintenance personnel to properly secure the left carburetor bowl cover, which resulted in an engine fire before takeoff.
- [NTSB ERA23LA144](https://openairdocs.org/ntsb/ERA23LA144.md): Piper PA-28R-200 · Slaughters, KY · Accident · No injuries · Class 3 · Limited · Final report · Mar 2, 2023 · N9420N · Substantial damage
  > Maintenance personnel’s failure to secure the fuel strainer bowl with safety wire, which resulted in the fuel strainer bowl leaking and starving the engine of fuel. Also causal was the obstruction of two fuel injector nozzles.
- [NTSB ERA23LA120](https://openairdocs.org/ntsb/ERA23LA120.md): Mooney M20C · Calhoun, GA · Accident · Serious injuries · Class 3 · Limited · Final report · Jan 28, 2023 · N5587Q · Destroyed
  > A partial loss of engine power during the initial climb due to an improperly installed spark plug.
- [NTSB CEN23FA079](https://openairdocs.org/ntsb/CEN23FA079.md): Piper PA-32-301T · Kingfisher, OK · Accident · 2 fatal · Class 3 · Field · Final report · Jan 16, 2023 · N8266D · Destroyed
  > An oil leak of undetermined origin that resulted in an in-flight engine compartment fire and subsequent loss of airplane control.
- [NTSB CEN23LA067](https://openairdocs.org/ntsb/CEN23LA067.md): Cessna 172F · Auburn Hills, MI · Accident · Minor injuries · Class 3 · Limited · Final report · Dec 21, 2022 · N8768U · Substantial damage
  > The catastrophic engine failure due to lack of oil lubrication, which resulted from the pilot’s failure to follow the airplane and engine manufacturers’ guidance for cold weather operation.
- [NTSB ERA23LA073](https://openairdocs.org/ntsb/ERA23LA073.md): Childs Michael A Rotorway Exec 162-F · Titusville, FL · Accident · No injuries · Class 3 · Limited · Final report · Nov 27, 2022 · N8006A · Substantial damage
  > A failure of the No. 4 exhaust valve spring retainer, which resulted in a partial loss of engine power.
- [NTSB CEN23LA040](https://openairdocs.org/ntsb/CEN23LA040.md): Cessna 150L · Cypress, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 20, 2022 · N10612 · Substantial damage
  > Failure of the engine exhaust valve during cruise flight, which resulted in a loss of engine power and a forced landing.
- [NTSB CEN23LA027](https://openairdocs.org/ntsb/CEN23LA027.md): Cessna R172E · Aguilar, CO · Accident · No injuries · Class 3 · Limited · Final report · Nov 5, 2022 · N6051U · Substantial damage
  > Failure of the engine cylinder assembly, which resulted in a loss of engine power during cruise flight and an impact with a fence during the forced landing.
- [NTSB ERA23LA034](https://openairdocs.org/ntsb/ERA23LA034.md): Cessna A185E · York, PA · Accident · No injuries · Class 3 · Limited · Final report · Oct 22, 2022 · N36ZN · Substantial damage
  > Oil starvation of the number 1 connecting rod bearings, which resulted in a total loss of engine power.
- [NTSB ERA23FA025](https://openairdocs.org/ntsb/ERA23FA025.md): Piper PA-32-300 · Brentwood, TN · Accident · 1 fatal · Class 3 · Field · Final report · Oct 18, 2022 · N600JG · Destroyed
  > A total loss of engine power due to the catastrophic failure of the crankshaft resulting from the improper installation of the crankshaft for this application.
- [NTSB WPR22LA363](https://openairdocs.org/ntsb/WPR22LA363.md): Robinson Helicopter R44 · Cedar City, UT · Accident · No injuries · Class 3 · Limited · Final report · Sep 30, 2022 · N297SU · Substantial damage
  > A partial loss of engine power due to a damaged cylinder intake valve and subsequent collision with terrain during an autorotation.
- [NTSB CEN22LA438](https://openairdocs.org/ntsb/CEN22LA438.md): Shirey David A Fisher Celebrity · Haskell, OK · Accident · No injuries · Class 4 · Limited · Final report · Sep 30, 2022 · N812TD · Destroyed
  > The inflight fire for reasons that could not be determined.
- [NTSB WPR22LA316](https://openairdocs.org/ntsb/WPR22LA316.md): Cessna 150H · Vacaville, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 24, 2022 · N22507 · Substantial damage
  > The partial loss of engine power due to a stuck exhaust valve.
- [NTSB ERA22LA380](https://openairdocs.org/ntsb/ERA22LA380.md): Cessna 150 · Berry, AL · Accident · No injuries · Class 3 · Limited · Final report · Aug 20, 2022 · N8797G · Substantial damage
  > A partial loss of engine power due to the No. 3 cylinder’s stuck exhaust valve.
- [NTSB CEN22LA344](https://openairdocs.org/ntsb/CEN22LA344.md): Piper PA-32RT-300T · Dallas, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 28, 2022 · N3027J · Substantial damage
  > Maintenance personnel’s inadequate maintenance of the magneto, which resulted in a loss of engine ignition, a loss of engine power, and a subsequent forced landing.
- [NTSB CEN22LA334](https://openairdocs.org/ntsb/CEN22LA334.md): Van's RV-10 · Beaver Dam, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 22, 2022 · N4400K · Substantial damage
  > The improperly secured spark plug boot that resulted in smoke in the cockpit and a subsequent off-airport landing.

Next page: https://openairdocs.org/ntsb-events/340/sequence.md?status=final&page=3

## 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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '340' 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/340/sequence?page=2&status=final

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