# NTSB investigations, AK: Propeller failure/malfunction

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 ANC02LA127](https://openairdocs.org/ntsb/ANC02LA127.md): Piper PA-18 · Ekwok, AK · Accident · No injuries · Limited investigation · Final report · Sep 30, 2002 · N723C · Substantial damage
  > A partial separation of one propeller blade during cruise flight.
- [NTSB ANC98LA131](https://openairdocs.org/ntsb/ANC98LA131.md): Cessna 172 · Palmer, AK · Accident · No injuries · Limited investigation · Final report · Aug 15, 1998 · N7966B · Substantial damage
  > Fatigue of the forward end of the engine crankshaft resulting in separation of the propeller assembly, and the operator's failure to comply with a required maintenance procedure. A factor was uneven terrain.
- [NTSB ANC97LA046](https://openairdocs.org/ntsb/ANC97LA046.md): Beech G18S · Nome, AK · Accident · No injuries · Limited investigation · Final report · Mar 21, 1997 · N555CG · Substantial damage
  > fracture of a propeller blade tip.
- [NTSB ANC97FA024](https://openairdocs.org/ntsb/ANC97FA024.md): de Havilland DHC-4A · Sparrevohn, AK · Accident · 1 fatal · Field investigation · Final report · Jan 30, 1997 · N702SC · Destroyed
  > loss of the right engine propeller control oil, which led to an overspeed of the right engine and propeller, and necessitated a shut-down of the right engine; and failure of the pilot to maintain adequate altitude/distance from terrain during visual approach…
- [NTSB ANC96LA096](https://openairdocs.org/ntsb/ANC96LA096.md): Beech 18 · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Jul 6, 1996 · N700WA · Substantial damage
  > The malfunction of the propeller control unit on the right engine.
- [NTSB ANC95IA173](https://openairdocs.org/ntsb/ANC95IA173.md): Piper PA-28-181 · Gustavus, AK · Incident · No injuries · Incident investigation · Final report · Sep 22, 1995 · N38293 · No damage
  > fatigue failure of the propeller blade due to previous foreign object damage.
- [NTSB ANC95IA151](https://openairdocs.org/ntsb/ANC95IA151.md): Piper PA-28-181 · Juneau, AK · Incident · No injuries · Incident investigation · Final report · Aug 26, 1995 · N2937X · Minor damage
  > failure and separation of the propeller blade due to foreign object damage and fatigue.
- [NTSB ANC95LA131](https://openairdocs.org/ntsb/ANC95LA131.md): Piper PA-18-160 · Port Alsworth, AK · Accident · No injuries · Limited investigation · Final report · Aug 6, 1995 · N814JM · Substantial damage
  > An in-flight separation of a propeller blade, which resulted in a severe vibration, shutdown of the engine, and a forced landing in alder bushes.

## 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 o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 131)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=131&state=AK

---
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.