# 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 5 of 13 · 604 cases

## Cases, newest first

- [NTSB ERA18LA265](https://openairdocs.org/ntsb/ERA18LA265.md): Piper PA32 · Bartow, FL · Accident · Minor injuries · Limited investigation · Final report · Sep 28, 2018 · N4592X · Substantial damage
  > A total loss of engine power after the separation of the No. 3 cylinder from the crankcase due to improper maintenance.
- [NTSB ERA18LA259](https://openairdocs.org/ntsb/ERA18LA259.md): Cessna 152 · St. Augustine, FL · Accident · No injuries · Limited investigation · Final report · Sep 8, 2018 · N6469P · Substantial damage
  > The partial loss of engine power due to a fractured exhaust valve, which resulted in a forced landing on unsuitable terrain and a subsequent rollover.
- [NTSB WPR18LA248](https://openairdocs.org/ntsb/WPR18LA248.md): Piper PA28 · Tat Momoli, AZ · Accident · No injuries · Class 3 · Limited · Final report · Aug 29, 2018 · N4139A · Substantial damage
  > A total loss of engine power due to a fatigue crack in the connecting rod bushing end.
- [NTSB CEN18LA342](https://openairdocs.org/ntsb/CEN18LA342.md): Cessna A188 · Whitewater, KS · Accident · No injuries · Limited investigation · Final report · Aug 17, 2018 · N9076R · Substantial damage
  > The partial loss of engine power due to low cylinder compression, which led to the forced landing following a pull-up maneuver. Contributing to the accident was the airplane’s high gross weight.
- [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 ANC18LA058](https://openairdocs.org/ntsb/ANC18LA058.md): Robinson R44 · Bettles, AK · Accident · No injuries · Limited investigation · Final report · Jul 29, 2018 · N744AK · Substantial damage
  > Maintenance personnel's application of insufficient preload on the attachment hardware for the idler gear shaft during engine overhaul, which resulted in the dismounting of the idler gear shaft assembly due to wear and deformation and the subsequent total…
- [NTSB ERA18LA190](https://openairdocs.org/ntsb/ERA18LA190.md): Glasair SH2 · Passadumkeag, ME · Accident · No injuries · Class 3 · Limited · Final report · Jul 11, 2018 · N352GL · Substantial damage
  > A total loss of engine power due to a fatigue fracture of the crankshaft.
- [NTSB CEN18LA247](https://openairdocs.org/ntsb/CEN18LA247.md): Safari 400 · Aguilares, TX · Accident · Serious injuries · Limited investigation · Final report · Jul 2, 2018 · N326RW · Substantial damage
  > The loss of tail rotor control due to the in-flight failure of the tail rotor pinion.
- [NTSB WPR18LA174](https://openairdocs.org/ntsb/WPR18LA174.md): Cirrus Design SR22 · Aguila, AZ · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 19, 2018 · N764CT · Destroyed
  > A total loss of engine power due to pre-ignition/detonation for reasons that could not be determined based on available information.
- [NTSB ERA18LA168](https://openairdocs.org/ntsb/ERA18LA168.md): Stinson L 5 · Thomson, GA · Accident · No injuries · Class 3 · Limited · Final report · Jun 14, 2018 · N45TX · Substantial damage
  > Failure of maintenance personnel to inspect the crankshaft after two previous propeller strikes, which resulted in failure of the crankshaft and a total loss of engine power. Contributing to the crankshaft failure was insufficient torque applied to the thrust…
- [NTSB CEN18LA178](https://openairdocs.org/ntsb/CEN18LA178.md): Peet Charles Zenith CH 701 · Jackson, WY · Accident · Minor injuries · Class 3 · Limited · Final report · May 16, 2018 · N44CP · Substantial damage
  > A total loss of engine power for undetermined reasons, and the pilot’s failure to maintain proper control of the airplane, which led to a hard, bounced landing.
- [NTSB CEN18LA174](https://openairdocs.org/ntsb/CEN18LA174.md): Cessna 177 · Fort Wayne, IN · Accident · No injuries · Limited investigation · Final report · May 15, 2018 · N9058F · Substantial damage
  > The failure of the oil cooler due to a defect in the brazed joint, which resulted in a loss of engine power due to oil starvation.
- [NTSB WPR18FA131](https://openairdocs.org/ntsb/WPR18FA131.md): American Air Racing Thunder Mustang · Reno, NV · Accident · 1 fatal · Field investigation · Final report · May 2, 2018 · N352BT · Substantial damage
  > The pilot's failure to properly secure the engine coolant pump pulley during recent maintenance, which resulted in a loss of the engine's lubrication, cooling, and propeller control systems, and a forced landing, during which the airplane nosed over.…
- [NTSB DCA18MA142](https://openairdocs.org/ntsb/DCA18MA142.md): Boeing 737 7H4 · Philadelphia, PA · Accident · 1 fatal · Class 1 · Major · Final report · Apr 17, 2018 · N772SW · Substantial damage
  > A low-cycle fatigue crack in the dovetail of fan blade No. 13, which resulted in the fan blade separating in flight and impacting the engine fan case at a location that was critical to the structural integrity and performance of the fan cowl structure. This…
- [NTSB CEN18LA117](https://openairdocs.org/ntsb/CEN18LA117.md): Black Donald Cozy III · Los Lunas, NM · Accident · No injuries · Limited investigation · Final report · Feb 17, 2018 · N904DB · Substantial damage
  > The seizure of the propeller gearbox for reasons that could not be determined based on the available information, which resulted in a forced landing.
- [NTSB DCA18IA092](https://openairdocs.org/ntsb/DCA18IA092.md): Boeing 777 222 · Honolulu, HI · Incident · No injuries · Incident investigation · Final report · Feb 13, 2018 · N773UA · Minor damage
  > the fracture of a fan blade due to P&W's continued classification of the TAI inspection process as a new and emerging technology that permitted them to continue accomplishing the inspection without having to develop a formal, defined initial and recurrent…
- [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 ERA18LA072](https://openairdocs.org/ntsb/ERA18LA072.md): Cessna P210N · Farmington, PA · Accident · Minor injuries · Class 3 · Limited · Final report · Jan 29, 2018 · N34VF · Substantial damage
  > A total loss of engine power due to fatigue failure of the crankshaft drive gear teeth.
- [NTSB ERA18LA068](https://openairdocs.org/ntsb/ERA18LA068.md): Schweizer 269C · Fort Lauderdale, FL · Accident · No injuries · Limited investigation · Final report · Jan 24, 2018 · N3947C · Substantial damage
  > The partial loss of engine power during the initial climb due to a stuck intake valve on the No. 4 cylinder.
- [NTSB CEN18LA084](https://openairdocs.org/ntsb/CEN18LA084.md): Beech A36 · Abilene, TX · Accident · Serious injuries · Limited investigation · Final report · Jan 22, 2018 · N3600A · Substantial damage
  > Maintenance personnel’s improper maintenance of the engine, which resulted in a catastrophic engine failure due the shifting/slipping of the No. 2 bearing and the subsequent oil starvation and total loss of engine power during cruise flight.
- [NTSB WPR18LA050](https://openairdocs.org/ntsb/WPR18LA050.md): Gray Jim Robert Exec · Caldwell, ID · Accident · No injuries · Limited investigation · Final report · Dec 17, 2017 · N716JB · Substantial damage
  > Failure of the oil pressure gauge line, which resulted in oil exhaustion and a total loss of engine power.
- [NTSB CEN18FA053](https://openairdocs.org/ntsb/CEN18FA053.md): Cessna T210M · Oldenburg, IN · Accident · 3 fatal · Field investigation · Final report · Dec 17, 2017 · N761YZ · Destroyed
  > A total loss of engine power due to the failure of the No. 4 piston, which resulted in an attempted forced landing in dark night conditions and a subsequent in-flight collision with trees and terrain. Contributing to the accident were the pilot's situational…
- [NTSB ERA18FA046](https://openairdocs.org/ntsb/ERA18FA046.md): Beech 58 · St. Croix · Accident · 5 fatal · Field investigation · Final report · Dec 8, 2017 · N4494A · Destroyed
  > The non-multiengine rated pilot's failure to maintain airplane control during a single-engine approach. Contributing to the accident was a total loss of engine power on the left engine due to detonation for reasons that could not be determined based on the…
- [NTSB WPR18LA037](https://openairdocs.org/ntsb/WPR18LA037.md): Columbia Aircraft Mfg LC41 550FG · Oro Valley, AZ · Accident · No injuries · Class 3 · Limited · Final report · Nov 27, 2017 · N2526C · Substantial damage
  > The inadequate cooling time between repeated heavy braking applications, which resulted in the brakes overheating and a subsequent brake fire during the aborted takeoff sequence.
- [NTSB ANC18LA011](https://openairdocs.org/ntsb/ANC18LA011.md): Cessna 172 · Oloh, MS · Accident · Minor injuries · Limited investigation · Final report · Nov 25, 2017 · N739KW · Substantial damage
  > A partial loss of engine power due to the failure of the No. 3 valve key (exhaust).
- [NTSB WPR18LA030](https://openairdocs.org/ntsb/WPR18LA030.md): Vanderark RV-10 · Sun Lakes, AZ · Accident · No injuries · Limited investigation · Final report · Nov 12, 2017 · N917VA · Substantial damage
  > The fatigue fractures of the upper and lower alternator attachment bolts, which decreased the common drive belt tension and resulted in the subsequent in-flight separation of an alternator drive belt, the overheating of the engine, and the subsequent total…
- [NTSB ERA18LA021](https://openairdocs.org/ntsb/ERA18LA021.md): Socata TB200 · Annapolis, MD · Accident · No injuries · Class 2 · Limited · Final report · Nov 10, 2017 · N207GT · Substantial damage
  > A loss of engine power for undetermined reasons after the disconnection of the propeller governor control due to inadequate securenment during maintenance.
- [NTSB ENG18IA003](https://openairdocs.org/ntsb/ENG18IA003.md): Airbus A330-243 · Seattle, WA · Incident · No injuries · Class 3 · Incident · Final report · Nov 7, 2017 · N375HA · Minor damage
  > The loss of control of the left-hand engine and the subsequent thermal damage to the left wing on landing during engine reverse operation was due to a blockage of the variable stator vane torque motor filter that resulted in the engine’s electronic engine…
- [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 ERA17FA317](https://openairdocs.org/ntsb/ERA17FA317.md): Schweizer 269C · Medford, NJ · Accident · 2 fatal · Field investigation · Final report · Sep 8, 2017 · N204HF · Substantial damage
  > The pilot's early entry into and failure to maintain rotor rpm during a forced landing autorotation after performing an engine shutdown in flight, which resulted in an uncontrolled descent. Contributing to the accident was the failure of maintenance personnel…
- [NTSB ENG17IA036](https://openairdocs.org/ntsb/ENG17IA036.md): Boeing 757 232 · Las Vegas, NV · Incident · No injuries · Incident investigation · Final report · Sep 6, 2017 · N686DA · No damage
  > A No. 1 (left) engine undercowl fire caused by a fuel nozzle installation error during engine overhaul at Delta TechOps. A fuel nozzle b-nut was cross threaded, which allowed fuel to leak on hot engine case surfaces and subsequently ignite.
- [NTSB ANC17LA052](https://openairdocs.org/ntsb/ANC17LA052.md): Cessna A185 · Aniak, AK · Accident · No injuries · Limited investigation · Final report · Aug 18, 2017 · N92DC · Substantial damage
  > The pilot's inadequate preflight inspection, which failed to detect a crack in the propeller blade, which led to the separation of a section of a propeller blade due to fatigue.
- [NTSB ERA17LA277](https://openairdocs.org/ntsb/ERA17LA277.md): Piper PA28 · Canton, GA · Accident · Minor injuries · Limited investigation · Final report · Aug 15, 2017 · N2804T · Substantial damage
  > Maintenance personnel's failure to ensure the proper throttle linkage travel clearance after the installation of an exhaust system.
- [NTSB CEN17LA317](https://openairdocs.org/ntsb/CEN17LA317.md): Piper PA22 · Beckville, TX · Accident · Minor injuries · Limited investigation · Final report · Aug 14, 2017 · N2591A · Substantial damage
  > A stuck exhaust valve, which resulted in the failure of the valve and a loss of engine power. Contributing to the valve failure and loss of engine power was the extended time since the last overhaul.
- [NTSB ERA17LA275](https://openairdocs.org/ntsb/ERA17LA275.md): Piper J3C · Salisbury, CT · Accident · Minor injuries · Limited investigation · Final report · Aug 13, 2017 · N98550 · Substantial damage
  > An improper replacement of the crankshaft by maintenance personnel, which resulted in a failure of the crankshaft gear and total loss of engine power.
- [NTSB CEN17LA316](https://openairdocs.org/ntsb/CEN17LA316.md): Navion Navion G · Adrian, MI · Accident · Serious injuries · Limited investigation · Final report · Aug 11, 2017 · N249KC · Substantial damage
  > A leak in the gascolator, which allowed air to enter the fuel system and resulted in a partial loss of engine power.
- [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 WPR17LA157](https://openairdocs.org/ntsb/WPR17LA157.md): Cirrus Design SR22 · Ogden, UT · Accident · No injuries · Class 3 · Limited · Final report · Jul 15, 2017 · N754AP · Substantial damage
  > The failure of the No. 4 cylinder exhaust valve head, which resulted in a total loss of engine power due to oil starvation.
- [NTSB ERA17LA278](https://openairdocs.org/ntsb/ERA17LA278.md): Piper PA28 · Gainsville, GA · Accident · No injuries · Limited investigation · Final report · Jul 7, 2017 · N6653J · Substantial damage
  > The separation of the mixture control cable from the mixture control lever at the carburetor, which resulted in the partial loss of engine power.
- [NTSB CEN17LA255](https://openairdocs.org/ntsb/CEN17LA255.md): Beech A36 · El Paso, TX · Accident · No injuries · Limited investigation · Final report · Jul 4, 2017 · N24LF · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because a postaccident examination did not reveal any anomalies that would have precluded normal engine operation.
- [NTSB DCA17LA182](https://openairdocs.org/ntsb/DCA17LA182.md): Bombardier CL 600 2C10 · Denver, CO · Accident · No injuries · Class 3 · Limited · Final report · Jul 2, 2017 · N796SK · Substantial damage
  > The fuel supply tube fitting pulling out of the left engine’s operability bleed valve (OBV) during the landing rollout, allowing fuel to leak and contact hot engine cases, which ignited a fire that caused thermal damage to the engine pylon. Contributing to…
- [NTSB WPR17LA144](https://openairdocs.org/ntsb/WPR17LA144.md): Cessna U206F · Page, AZ · Accident · No injuries · Limited investigation · Final report · Jun 23, 2017 · N71001 · Substantial damage
  > The failure of the throttle control cable due to fatigue and maintenance personnel’s failure to replace the cable at the last engine overhaul, which resulted in the pilots’ inability to control engine power and led to a precautionary landing during which the…
- [NTSB ENG17IA028](https://openairdocs.org/ntsb/ENG17IA028.md): Bombardier CL 600 2C10 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Jun 10, 2017 · N715SK · Minor damage
  > A Bombardier CRJ700 No. 1 engine failure caused by buckling of the combustion outer liner due to fatigue cracks. The liner buckling resulted in airflow disruption and reduced engine performance. The engine fuel control unit attempted to compensate for the…
- [NTSB CEN17LA226](https://openairdocs.org/ntsb/CEN17LA226.md): Piper PA 32R-301T · Dalhart, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 2017 · N782SW · Substantial damage
  > The failure of the engine's front bearing seal due to maintenance personnel’s installation of an improperly sized crankshaft seal, which resulted in oil starvation and a forced landing.
- [NTSB WPR17LA121](https://openairdocs.org/ntsb/WPR17LA121.md): Bob Frederick Titan T-51 · Goodyear, AZ · Accident · No injuries · Limited investigation · Final report · Jun 4, 2017 · N51FB · Substantial damage
  > Failure of the propeller speed reduction gearbox input drive gear during the airplane’s initial climb for reasons that could not be determined due to extensive damage.
- [NTSB WPR17LA119](https://openairdocs.org/ntsb/WPR17LA119.md): Paul R Seipt Sonex · Garfield, WA · Accident · No injuries · Class 3 · Limited · Final report · Jun 3, 2017 · N255BZ · Substantial damage
  > The pilot’s improper torque of screws that attached the flywheel mounting flange to the crankshaft during engine assembly, which resulted in heavy vibrations and the subsequent in-flight loss of the propeller.
- [NTSB ENG17IA027](https://openairdocs.org/ntsb/ENG17IA027.md): Boeing 737 7H4 · Washington, DC · Incident · No injuries · Incident investigation · Final report · Jun 3, 2017 · N765SW · Minor damage
  > The failure the control alternator gearshaft, which disconnected the accessory gearbox from the rest of the engine and resulted in an uncommanded in-flight shutdown of the left engine and subsequent flight diversion. The control alternator gearshaft failed…
- [NTSB CEN17FA207](https://openairdocs.org/ntsb/CEN17FA207.md): Varga 2150A · Bowling Green, OH · Accident · 1 fatal · Field investigation · Final report · Jun 1, 2017 · N4635V · Substantial damage
  > The pilot's loss of control due to impairment from carbon monoxide poisoning. Contributing to the accident was the corrosion of the heat exchanger and the failure of maintenance personnel to adequately inspect and repair or replace the exchanger during the…
- [NTSB ERA17LA185](https://openairdocs.org/ntsb/ERA17LA185.md): Cessna 182 · West Chester, PA · Accident · No injuries · Limited investigation · Final report · May 21, 2017 · N378ES · Substantial damage
  > An engine crankcase overpressurization and the subsequent loss of engine oil for reasons that could not be determined, which resulted in the failure of the No. 6 cylinder connecting rod due to a lack of lubrication.

Next page: https://openairdocs.org/ntsb-events/340/sequence.md?status=final&page=6

## 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=5&status=final

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