# NTSB investigations, CA: 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 1 of 2 · 57 cases

## Latest cases

- [NTSB ENG27LA001](https://openairdocs.org/ntsb/ENG27LA001.md): Boeing 777-222 · San Francisco, CA · Incident · No injuries · Class 4 · Limited · Investigation open · Oct 6, 2026 · N796UA
- [NTSB DCA26LA184](https://openairdocs.org/ntsb/DCA26LA184.md): Boeing 787-9 · Los Angeles, CA · Incident · No injuries · Class 3 · Limited · Preliminary report · Mar 2, 2026 · N24972 · No damage
  > On March 2, 2026, at 1100 Pacific Standard Time, United Airlines flight 2127, a Boeing 787-9, registration N24972, powered by two General Electric GEnx™-1B76A/P2 turbofan engines, experienced a No. 1 (left) engine surge during climb from Los Angeles…
- [NTSB ENG25WA011](https://openairdocs.org/ntsb/ENG25WA011.md): Airbus A330 · Los Angeles, CA · Incident · Class 5 · Foreign · Dec 4, 2024 · VH-EBQ · No damage
- [NTSB WPR24LA267](https://openairdocs.org/ntsb/WPR24LA267.md): Piper PA-28R-201T · Sacramento, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 4, 2024 · N135DG · Substantial damage
  > A loss of engine power during the initial climb due to the detachment of the turbocharger’s inlet sleeve as a result of the installation of an incorrect sleeve clamp.
- [NTSB WPR24LA261](https://openairdocs.org/ntsb/WPR24LA261.md): Aeronca 11AC · Winchester, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 27, 2024 · N86270 · Substantial damage
  > A total loss of engine power due to a fatigue fracture of the crankshaft.
- [NTSB WPR24LA229](https://openairdocs.org/ntsb/WPR24LA229.md): Cessna 172N · San Diego, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 2, 2024 · N74C · Substantial damage
  > A failure of the No. 2 cylinder due to fatigue cracking as the result of an undersized fillet radius around the edge of the cylinder head dome.
- [NTSB WPR24LA210](https://openairdocs.org/ntsb/WPR24LA210.md): Lancair LC42-550FG · Humboldt Bay, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 20, 2024 · N141PB · Substantial damage
  > Maintenance personnel’s incorrect installation of an engine rocker cover gasket, which resulted in oil exhaustion and subsequent loss of engine power during the initial climb.
- [NTSB WPR24LA121](https://openairdocs.org/ntsb/WPR24LA121.md): Kitfox Series 5 · Yucca Grove, CA · Accident · No injuries · Class 3 · Limited · Final report · Apr 5, 2024 · N743JT · Substantial damage
  > The pilot’s improper repair of the oil sump, which resulted in a loss of oil pressure and collision with terrain during a precautionary landing.
- [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 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 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 DCA22FA082](https://openairdocs.org/ntsb/DCA22FA082.md): Joby Aero JAS4-2 · Jolon, CA · Accident · No injuries · Class 3 · Field · Final report · Feb 16, 2022 · N542AJ · Substantial damage
  > The separation of a propeller blade during expansion flight testing that resulted in cascading effects to include the separation of multiple propulsion motor/propeller assemblies and the loss of remote pilot control of the aircraft. Contributing to the…
- [NTSB WPR21FA048](https://openairdocs.org/ntsb/WPR21FA048.md): Cessna 182 · Los Angeles, CA · Accident · 1 fatal · Class 3 · Field · Final report · Nov 12, 2020 · N939CP · Destroyed
  > Maintenance personnel’s failure to properly secure the throttle control hardware during recent maintenance, which resulted in its disconnection and a subsequent loss of engine power on approach for landing.
- [NTSB WPR20LA193](https://openairdocs.org/ntsb/WPR20LA193.md): Thatcher CX4 · Upland, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 24, 2020 · N274DR · Substantial damage
  > The inflight separation of the propeller assembly due to a fatigue fracture of the crankshaft. Contributing to the accident was the pilot’s restricted visibility during landing, which resulted in an excessive approach speed, a long landing, and subsequent…
- [NTSB WPR19LA233](https://openairdocs.org/ntsb/WPR19LA233.md): Cessna 120 · Livermore, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 21, 2019 · N4237N · Substantial damage
  > A partial loss of engine power due to fouled spark plugs in the No. 4 cylinder. Contributing to the accident was the pilot’s exceedance of the airplane’s critical angle of attack and a subsequent loss of control during the initial climb.
- [NTSB WPR19TA186](https://openairdocs.org/ntsb/WPR19TA186.md): Glasair SH II · San Bernardino, CA · Accident · No injuries · Class 3 · Final report · Jul 1, 2019 · N279G · Substantial damage
  > A fuel leak caused by age-degraded fuel hoses, which resulted in a total loss of engine power and fire before takeoff. Contributing to the accident was inadequate maintenance.
- [NTSB WPR19LA137](https://openairdocs.org/ntsb/WPR19LA137.md): Grumman G164 · Sutter, CA · Accident · No injuries · Class 3 · Limited · Final report · May 5, 2019 · N3630D · Substantial damage
  > A loss of engine power due to the in-flight separation of the fuel control unit interconnect rod for reasons that could not be determined due to lack of available evidence.
- [NTSB WPR19LA108](https://openairdocs.org/ntsb/WPR19LA108.md): Europa XS · Winters, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 13, 2019 · N120EJ · Substantial damage
  > The pilot's failure to properly install a wrist pin circlip, which resulted in internal damage to the No. 5 cylinder and a subsequent total loss of engine power.
- [NTSB WPR18TA223](https://openairdocs.org/ntsb/WPR18TA223.md): Zenair Zenith Stol CH750 · Napa, CA · Accident · No injuries · Final report · Aug 11, 2018 · N328SK · Substantial damage
  > The pilot's use of fuel below the required octane rating, which caused engine detonation and damage and subsequently led to oil exhaustion and a total loss of engine power in flight. Contributing to the accident was the pilot's inadequate service/maintenance…
- [NTSB WPR18FA088](https://openairdocs.org/ntsb/WPR18FA088.md): Hastings Thomas G Cirrus VK 30 · Agua Dulce, CA · Accident · 4 fatal · Field investigation · Final report · Feb 11, 2018 · N52TH · Substantial damage
  > The driveshaft fracture due to overstress loading and rotational bending as a result of the under-torqued nuts on the elastomeric couplings backing off and the subsequent in-flight separation of the horizontal fairing due to contact with the separated end of…
- [NTSB WPR18LA039](https://openairdocs.org/ntsb/WPR18LA039.md): Cessna 172R · Redding, CA · Accident · No injuries · Class 3 · Limited · Final report · Nov 2, 2017 · N2103T · Substantial damage
  > The fatigue separation of the crankshaft due to a fatigue fracture, which resulted in a total loss of engine power and a subsequent off-airport landing and impact with a fence.
- [NTSB WPR18LA018](https://openairdocs.org/ntsb/WPR18LA018.md): Cirrus Design SR22 · Blythe, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 3, 2017 · N418CP · Substantial damage
  > Maintenance personnel's failure to properly torque an oil supply line fitting, which resulted in oil starvation, a subsequent engine failure, and an off-airport landing.
- [NTSB WPR17LA174](https://openairdocs.org/ntsb/WPR17LA174.md): Rockwell International S 2R · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Aug 1, 2017 · N4913X · Substantial damage
  > The partial loss of engine power due to the overstress separation of three supercharger drive gear teeth.
- [NTSB WPR17LA097](https://openairdocs.org/ntsb/WPR17LA097.md): Robinson Helicopter R44 · Santa Barbara, CA · Accident · Serious injuries · Limited investigation · Final report · May 5, 2017 · N981RR · Destroyed
  > A total loss of engine power during cruise flight due to the failure of an engine piston rod for reasons that could not be determined due to extensive damage.
- [NTSB WPR17LA048](https://openairdocs.org/ntsb/WPR17LA048.md): Schosanski John H Cozy MK IV R · Napa, CA · Accident · No injuries · Limited investigation · Final report · Jan 4, 2017 · N4518S · Substantial damage
  > A partial loss of power due to missing apex seals.
- [NTSB WPR17LA042](https://openairdocs.org/ntsb/WPR17LA042.md): Air Tractor AT 602 · Willows, CA · Accident · No injuries · Limited investigation · Final report · Dec 27, 2016 · N602L · Substantial damage
  > The decision of the maintenance facility mechanic to conduct maintenance without reference to the applicable manufacturer’s guidance, which resulted in the improper reassembly and subsequent failure of the engine compressor bleed valve, which in turn…
- [NTSB WPR16LA096](https://openairdocs.org/ntsb/WPR16LA096.md): DG Flugzeugbau DG 800B · Clements, CA · Accident · No injuries · Limited investigation · Final report · Apr 25, 2016 · N800YG · Substantial damage
  > The motorglider pilot's decision to perform an in-flight engine start with insufficient altitude, which resulted in an off-airport landing and collision with trees after the engine did not start. Contributing to the accident was the pilot's distraction by the…
- [NTSB WPR15FA236](https://openairdocs.org/ntsb/WPR15FA236.md): Cessna 182F · Montecito, CA · Accident · 2 fatal · Field investigation · Final report · Aug 7, 2015 · N5738F · Substantial damage
  > Oil starvation that led to the failure of the No. 5 connecting rod and a subsequent loss of engine power.
- [NTSB WPR15LA230](https://openairdocs.org/ntsb/WPR15LA230.md): Grumman G164 - B · Princeton, CA · Accident · No injuries · Limited investigation · Final report · Aug 4, 2015 · N48452 · Substantial damage
  > The loss of engine power during an agricultural application flight due to a cylinder failure.
- [NTSB WPR15LA194](https://openairdocs.org/ntsb/WPR15LA194.md): Grumman Acft ENG Cor-Schweizer G 164A · Five Points, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 21, 2015 · N8598H · Substantial damage
  > Maintenance personnel’s improper reassembly of the engine during overhaul, which led to the failure of the supercharger-blower due to a lack of lubrication and the subsequent total loss of engine power during takeoff.
- [NTSB WPR15LA175](https://openairdocs.org/ntsb/WPR15LA175.md): Mooney M20K · Fresno, CA · Accident · No injuries · Limited investigation · Final report · Jun 3, 2015 · N3567H · Substantial damage
  > A total loss of engine power during cruise flight due to a failure of the No. 1 piston and connecting rod assembly.
- [NTSB WPR15LA085](https://openairdocs.org/ntsb/WPR15LA085.md): Cubcrafters CC11-160 · San Luis Obispo, CA · Accident · No injuries · Limited investigation · Final report · Jan 16, 2015 · N232LT · Substantial damage
  > The pilot's inadequate instrument scan during cruise flight, which resulted in his failure to notice a loss of engine oil pressure. Contributing to the accident was the failure of the oil pressure transducer supply line, which resulted in oil exhaustion and a…
- [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 WPR14LA237](https://openairdocs.org/ntsb/WPR14LA237.md): Craig W Sherman Super Glasair TT · Madera, CA · Accident · No injuries · Limited investigation · Final report · Jun 8, 2014 · N400MC · Substantial damage
  > The loosening of a B-nut in the fuel system which resulted in a rapid, undetected fuel leak and subsequent fuel exhaustion.
- [NTSB WPR14LA079](https://openairdocs.org/ntsb/WPR14LA079.md): Stinson 108 1 · Lodi, CA · Accident · No injuries · Limited investigation · Final report · Dec 27, 2013 · N8848K · Substantial damage
  > The fatigue failure of the crankshaft, which resulted in a total loss of engine power and subsequent forced landing.
- [NTSB WPR13LA358](https://openairdocs.org/ntsb/WPR13LA358.md): Bell 206B · Chualar, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 4, 2013 · N90146 · Substantial damage
  > Maintenance personnel's failure to properly tighten the bolts securing the main driveshaft to the transmission, which resulted in fatigue failure of the bolts and disconnection of the driveshaft during low-altitude flight.
- [NTSB WPR13LA035](https://openairdocs.org/ntsb/WPR13LA035.md): Cessna 172M · Modesto, CA · Accident · Minor injuries · Limited investigation · Final report · Nov 6, 2012 · N21391 · Substantial damage
  > Failure of the throttle control cable during maneuvering flight, which resulted in a partial loss of engine power.
- [NTSB WPR12LA281](https://openairdocs.org/ntsb/WPR12LA281.md): Tecnam P2002 Sierra · Watsonville, CA · Accident · No injuries · Limited investigation · Final report · Jun 30, 2012 · N308TA · Substantial damage
  > A partial loss of engine power during initial climb due to the blockage of the carburetor’s main jet by deteriorated float material. Contributing to the accident was an inadequate maintenance inspection by maintenance personnel.
- [NTSB WPR11GA431](https://openairdocs.org/ntsb/WPR11GA431.md): Bell 205 · Tehachapi, CA · Accident · Minor injuries · Final report · Sep 4, 2011 · N205WW · Substantial damage
  > The pilot's inability to adequately execute an emergency autorotation due to the flight's low altitude during external load operations, which resulted in a hard landing. Contributing to the accident was a torsionally overstressed tachometer shaft, which sent…
- [NTSB WPR11LA423](https://openairdocs.org/ntsb/WPR11LA423.md): Arrow Falcon Exporters UH-1H · Stockton, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 2, 2011 · N205PJ · Substantial damage
  > A total loss of engine power due to the separation of a tooth from the starter-generator drive gear, which resulted in failure of the engine oil pump and subsequent oil starvation.
- [NTSB WPR11LA311](https://openairdocs.org/ntsb/WPR11LA311.md): Cessna R182 · Hesperia, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 6, 2011 · N7392X · Substantial damage
  > The separation of the end baffle cone inside the muffler, which blocked airflow through the engine after takeoff and resulted in a loss of engine power and an off-airport landing into obstacles.
- [NTSB WPR11LA102](https://openairdocs.org/ntsb/WPR11LA102.md): Piper PA-28-235 · San Luis Obispo, CA · Accident · No injuries · Limited investigation · Final report · Jan 20, 2011 · N8608W · Substantial damage
  > The loss of engine power due to the fatigue fracture of one attachment bolt for the left idler gear shaft, which resulted from an insufficient preload on both attachment bolts.
- [NTSB ENG11IA011](https://openairdocs.org/ntsb/ENG11IA011.md): Boeing 737 · San Francisco, CA · Incident · No injuries · Incident investigation · Final report · Dec 25, 2010 · N248WN · No damage
  > The probable cause of the undercowl in-flight engine fire was the insufficient installation torque of the bolts that secure the fuel manifold cover to the fuel manifold. Engine vibrations and fuel pressure cycles caused the bolts to gradually loosen further…
- [NTSB WPR11LA070](https://openairdocs.org/ntsb/WPR11LA070.md): Bellanca 7KCAB · Corona, CA · Accident · Minor injuries · Limited investigation · Final report · Dec 2, 2010 · N11858 · Substantial damage
  > The total loss of engine power due to oil exhaustion as a result of a broken oil line.
- [NTSB WPR10LA465](https://openairdocs.org/ntsb/WPR10LA465.md): Mooney M20C · Visalia, CA · Accident · No injuries · Limited investigation · Final report · Sep 21, 2010 · N6090Q · Substantial damage
  > A partial loss of engine power during takeoff, which resulted from the failure of the spark plug retention mechanism.
- [NTSB WPR10LA127](https://openairdocs.org/ntsb/WPR10LA127.md): Hiller UH-12E · Los Banos, CA · Accident · No injuries · Limited investigation · Final report · Feb 2, 2010 · N36MV · Substantial damage
  > A partial loss of engine power due to a failure of the throttle interconnect hardware, which resulted in a hard landing.
- [NTSB WPR10LA126](https://openairdocs.org/ntsb/WPR10LA126.md): Arrow Falcon Exporters OH-58A · Escalon, CA · Accident · Serious injuries · Limited investigation · Final report · Feb 2, 2010 · N9286U · Substantial damage
  > A loss of engine power during cruise flight due to the fatigue failure of the pneumatic fuel-to-governor control line. Also causal was the inadequate installation of the pneumatic line by maintenance personnel, and the pilot’s decision to continue flight with…
- [NTSB WPR10FA056](https://openairdocs.org/ntsb/WPR10FA056.md): Beech A36 · San Gabriel, CA · Accident · 1 fatal · Field investigation · Final report · Nov 15, 2009 · N17803 · Substantial damage
  > Failure of the exhaust band V-clamp during cruise flight, which resulted in an in-flight fire and a subsequent forced landing.
- [NTSB WPR09LA373](https://openairdocs.org/ntsb/WPR09LA373.md): Grumman G164 · Riverdale, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 28, 2009 · N8741H · Substantial damage
  > The partial loss of engine power due to the failure of the engine's supercharger-blower.
- [NTSB WPR09LA145](https://openairdocs.org/ntsb/WPR09LA145.md): Cessna 172R · Oceanside, CA · Accident · Serious injuries · Limited investigation · Final report · Mar 8, 2009 · N2478B · Substantial damage
  > A total loss of engine power in flight due to the fatigue failure of the No. 4 cylinder.

Next page: https://openairdocs.org/ntsb-events/340/sequence.md?state=CA&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 c."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA'
  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?state=CA

---
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.