# NTSB investigations, AK: 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.

## Latest cases

- [NTSB ENG26FA034](https://openairdocs.org/ntsb/ENG26FA034.md): Boeing 747 · Anchorage, AK · Incident · No injuries · Class 3 · Field · Preliminary report · Aug 15, 2026 · B-18725 · Minor damage
  > On August 15, 2026, 1755 Alaska Daylight Time, a China Airlines Flight Number CI-5265, Boeing 747-400F, registration B-18725, powered by four GE Aerospace CF6-80C2B1F turbofan engines, experienced an inflight fire indication during the initial climb from Ted…
- [NTSB ANC25LA025](https://openairdocs.org/ntsb/ANC25LA025.md): Cessna 172A · Fairbanks, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 16, 2025 · N7274T · Substantial damage
  > The pilot’s decision to initiate the flight despite identifying a malfunction in the carburetor heat system during the pre-takeoff engine run-up, which led to a partial loss of engine power during climb out. Contributing to the accident was maintenance…
- [NTSB ANC24LA025](https://openairdocs.org/ntsb/ANC24LA025.md): Cessna 120 · Talkeetna, AK · Accident · No injuries · Class 3 · Limited · Final report · Apr 21, 2024 · N77032 · Substantial damage
  > A degraded ignition system, which resulted in a total loss of engine power. Contributing to the accident was maintenance personnel’s inadequate inspection of the ignition system.
- [NTSB ANC22LA049](https://openairdocs.org/ntsb/ANC22LA049.md): Piper PA-20 · Palmer, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 20, 2022 · N7048K · Substantial damage
  > The loss of engine power due to carburetor icing and the pilot’s failure to utilize carburetor heat.
- [NTSB ANC21LA094](https://openairdocs.org/ntsb/ANC21LA094.md): Dehavilland DHC-3 · Bettles, AK · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2021 · N560TR · Substantial damage
  > The seizure of the engine during flight for undetermined reasons, which led to a total loss of engine power.
- [NTSB ANC21LA038](https://openairdocs.org/ntsb/ANC21LA038.md): Enstrom F-28F · Palmer, AK · Accident · No injuries · Class 3 · Limited · Final report · May 9, 2021 · N8627J · Substantial damage
  > A loss of drive to the rotor system due to the disengagement of the main belt drive tensioning system, which resulted in a forced landing. The disengagement was due to inadequate clearance between the clutch handle and the roll pin in the handle bellcrank…
- [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 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 ANC17LA007](https://openairdocs.org/ntsb/ANC17LA007.md): Piper PA-18 · Bethel, AK · Accident · No injuries · Limited investigation · Final report · Nov 22, 2016 · N83641 · Substantial damage
  > The mechanic's failure to install a whistle slot in the engine breather tube, which resulted in a frozen tube, displacement of the crankshaft oil seal, a loss of oil, and smoke in the cockpit, which led to a forced landing.
- [NTSB ANC17LA006](https://openairdocs.org/ntsb/ANC17LA006.md): Piper PA32R · Bethel, AK · Accident · Minor injuries · Limited investigation · Final report · Nov 12, 2016 · N9084J · Substantial damage
  > A total loss of engine power due to oil starvation, which resulted from an oil cooler leak at a fractured brazed seam.
- [NTSB ANC15FA066](https://openairdocs.org/ntsb/ANC15FA066.md): Cessna 180 · Kasilof, AK · Accident · 2 fatal · Field investigation · Final report · Aug 23, 2015 · N3043E · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on postaccident examination and testing.
- [NTSB ANC14LA085](https://openairdocs.org/ntsb/ANC14LA085.md): Cessna TU206 · Deadhorse, AK · Accident · No injuries · Limited investigation · Final report · Sep 22, 2014 · N206J · Substantial damage
  > The application of insufficient torque to the engine cylinder through bolts during the replacement of the No. 1 cylinder, which resulted in the displacement of the No. 2 bearing, oil starvation, and a catastrophic engine failure.
- [NTSB ANC13LA102](https://openairdocs.org/ntsb/ANC13LA102.md): Piper J3L-65 · Nondalton, AK · Accident · No injuries · Limited investigation · Final report · Sep 5, 2013 · N38262 · Substantial damage
  > The fracture and subsequent failure of the No. 4 cylinder exhaust valve during cruise flight, which resulted in a total loss of engine power.
- [NTSB ANC13LA079](https://openairdocs.org/ntsb/ANC13LA079.md): Piper PA-18-150 · Paxson, AK · Accident · No injuries · Limited investigation · Final report · Aug 13, 2013 · N44RT · Substantial damage
  > The partial loss of engine power due to a loose throttle cable clamp.
- [NTSB ANC13LA012](https://openairdocs.org/ntsb/ANC13LA012.md): Cessna 208B · Mekoryuk, AK · Accident · Minor injuries · Limited investigation · Final report · Dec 3, 2012 · N169LJ · Substantial damage
  > The total loss of engine power as a result of a fractured first-stage compressor blade due to fatigue cracking. The source of the fatigue crack could not be determined due to secondary damage sustained to the fracture surface.
- [NTSB ANC12LA075](https://openairdocs.org/ntsb/ANC12LA075.md): Piper PA-18-150 · Kenai, AK · Accident · No injuries · Limited investigation · Final report · Jul 14, 2012 · N7154Z · Substantial damage
  > The in-flight separation of a propeller tip due to an unauthorized and undocumented propeller repair.
- [NTSB ANC09LA065](https://openairdocs.org/ntsb/ANC09LA065.md): Noorduyn UC-64A · Akiachak, AK · Accident · No injuries · Limited investigation · Final report · Jul 11, 2009 · N225BL · Substantial damage
  > The loss of engine power due to the failure of a crankshaft component, resulting in an off-airport landing.
- [NTSB ANC09LA009](https://openairdocs.org/ntsb/ANC09LA009.md): Construcciones Aeronauticas CASA-212 · Toksook Bay, AK · Accident · Minor injuries · Limited investigation · Final report · Nov 2, 2008 · N437RA · Substantial damage
  > The flight crew’s inability to adjust/increase power to the right engine during the landing approach due to an in-flight disconnect of the engine power control linkage, resulting in a loss of control of the airplane. Contributing to the accident was the…
- [NTSB ANC08LA097](https://openairdocs.org/ntsb/ANC08LA097.md): Piper PA-31-350 · Aniak, AK · Accident · Serious injuries · Limited investigation · Final report · Aug 4, 2008 · N40YR · Substantial damage
  > A partial loss of engine power during takeoff due to a failure of the left engine's turbocharger as a result of the failure of a turbine shaft bearing. Contributing to the accident was unsuitable terrain for a forced landing.
- [NTSB ANC08IA092](https://openairdocs.org/ntsb/ANC08IA092.md): Saab-Scania Saab 340B · Anchorage, AK · Incident · No injuries · Incident investigation · Final report · Jul 29, 2008 · N364PX · No damage
  > The failure of one of the stage 1 gas generator rotor blades due to high-cycle fatigue, resulting in a contained engine failure during the takeoff roll.
- [NTSB ANC08LA089](https://openairdocs.org/ntsb/ANC08LA089.md): Dehavilland DHC-3 · Iliamna, AK · Accident · No injuries · Limited investigation · Final report · Jul 22, 2008 · N61FE · Substantial damage
  > A total loss of engine power due to the separation of the number 8 cylinder from the engine, which separated an oil line, resulting in a loss of oil and oil pressure. Contributing to the accident was the float-equipped airplane's forced landing on a road.

## 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" = 'AK' 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=AK

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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.