# NTSB investigations, 1999: 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 NYC00LA061](https://openairdocs.org/ntsb/NYC00LA061.md): Zielke RV-4 · Florence, NJ · Accident · Minor injuries · Limited investigation · Final report · Dec 25, 1999 · N8ZZ · Substantial damage
  > Failure of one of the propeller blades. A factor was the necessity land across, rather than in alignment with, the furrowed terrain due to the nature of the emergency.
- [NTSB FTW00LA042](https://openairdocs.org/ntsb/FTW00LA042.md): King Lancair 235/320 · Sterling City, TX · Accident · No injuries · Limited investigation · Final report · Dec 12, 1999 · N717SK · Substantial damage
  > The fatigue fracture of the propeller attaching bolts, due to improper torque during the installation of the propeller by other maintenance personnel. A factor was the lack of suitable terrain for the forced landing.
- [NTSB LAX00LA023](https://openairdocs.org/ntsb/LAX00LA023.md): Luhnau BD-5B · Boulder City, NV · Accident · 1 fatal · Limited investigation · Final report · Oct 22, 1999 · N62765 · Substantial damage
  > The pilot's failure to secure an electrical wire terminal in the propeller pitch control circuit following a maintenance adjustment, which resulted in the propeller malfunctioning and going to a flat pitch. The flat pitch of the propeller produced a high drag…
- [NTSB FTW99LA271](https://openairdocs.org/ntsb/FTW99LA271.md): Stinson L-5 · Woodward, OK · Accident · No injuries · Limited investigation · Final report · Sep 29, 1999 · N68591 · Substantial damage
  > The in-flight separation of the tip of a wood propeller blade. Contributing factors were the soft terrain and ditch encountered during the precautionary landing.
- [NTSB SEA99LA174](https://openairdocs.org/ntsb/SEA99LA174.md): Piper PA-28-180 · Vaughn, WA · Accident · No injuries · Limited investigation · Final report · Sep 26, 1999 · N9395J · Substantial damage
  > The separation of a propeller blade tip due to fatigue, and the improper maintenance procedure.
- [NTSB NYC99LA202](https://openairdocs.org/ntsb/NYC99LA202.md): Mooney M20E · Prattsburg, NY · Accident · Serious injuries · Limited investigation · Final report · Aug 15, 1999 · N3243F · Destroyed
  > Propeller blade separation, resulting from fatigue cracking initiated by intergranular corrosion. A factor was the lack of propeller blade corrosion inspection requirements.
- [NTSB NYC99LA184](https://openairdocs.org/ntsb/NYC99LA184.md): Troy Pietenpol · Collins, OH · Accident · No injuries · Limited investigation · Final report · Jul 26, 1999 · N6286A · Substantial damage
  > In-flight separation of the propeller.
- [NTSB MIA99LA173](https://openairdocs.org/ntsb/MIA99LA173.md): Cessna 182R · Sevierville, TN · Accident · Minor injuries · Limited investigation · Final report · Jun 12, 1999 · N6126E · Substantial damage
  > A loss of propeller governor control due to oil contamination.
- [NTSB FTW99FA148](https://openairdocs.org/ntsb/FTW99FA148.md): Beech C18S · Waldron, AR · Accident · 1 fatal · Field investigation · Final report · May 24, 1999 · N9729H · Destroyed
  > the separation of a propeller blade in cruise flight as a result of fatigue cracking emanating from surface corrosion pitting.
- [NTSB FTW99FA132](https://openairdocs.org/ntsb/FTW99FA132.md): Grumman American AA-5B · Claremore, OK · Accident · No injuries · Field investigation · Final report · May 8, 1999 · N4546J · Substantial damage
  > The fatigue fracture of the propeller bolts resulting from the improper installation of the propeller assembly.

## 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 year(c."eventDate") = 1999
  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&year=1999

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