# NTSB investigations: Lycoming TVO-435-GIA: Loss of engine power(total) - mech failure/malf

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 LAX03TA043](https://openairdocs.org/ntsb/LAX03TA043.md): Bell 47G-3B-1 · Panaca, NV · Accident · No injuries · Final report · Dec 1, 2002 · N48020 · Substantial damage
  > separation of the no. 6 cylinder intake valve head from the valve stem, which resulted in a loss of engine power. The mechanism responsible for the valve failure is unknown.
- [NTSB SEA98LA069](https://openairdocs.org/ntsb/SEA98LA069.md): Bell 47G3B2A · Stanwood, WA · Accident · No injuries · Limited investigation · Final report · May 3, 1998 · N7965J · Substantial damage
  > The failure of the number two connecting rod, which led to additional internal engine damage and a complete loss of power. Factors include soft terrain in the area where the pilot found it necessary to execute his forced landing.
- [NTSB FTW98GA097](https://openairdocs.org/ntsb/FTW98GA097.md): Bell 47G-3B-2 · Spanish Fork, UT · Accident · 1 fatal · Final report · Jan 14, 1998 · N1461W · Substantial damage
  > A total loss of power due to repeated engine overspeeds. A related factor was unsuitable terrain.
- [NTSB LAX94LA200](https://openairdocs.org/ntsb/LAX94LA200.md): Bell 47G-3B-1 · Yuma, AZ · Accident · No injuries · Limited investigation · Final report · Apr 17, 1994 · N304JP · Substantial damage
  > an uncommanded engine deceleration to idle due to the improper installation of the throttle arm on the carburetor shaft.
- [NTSB SEA93LA034](https://openairdocs.org/ntsb/SEA93LA034.md): Bell 47G3-B2A · Montpelier, ID · Accident · No injuries · Limited investigation · Final report · Dec 7, 1992 · N58131 · Substantial damage
  > The loss of engine power due to leaking internal carburetor seals, resulting from improper repair of the carburetor by an acft repair station.
- [NTSB SEA91LA109](https://openairdocs.org/ntsb/SEA91LA109.md): Bell 47G-3B-1 · Malott, WA · Accident · No injuries · Limited investigation · Final report · May 19, 1991 · N73903 · Destroyed
  > An undetermined failure of the fuel pump casing resulting in an in flight fire and loss of engine power.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41526')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41526&occurrence=351

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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.