# NTSB investigations: Lycoming TVO-435-GIA: In flight collision with terrain/water

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 SEA00LA124](https://openairdocs.org/ntsb/SEA00LA124.md): Bell 47G · Haines, OR · Accident · Minor injuries · Limited investigation · Final report · Jul 4, 2000 · N30DP · Substantial damage
  > The pilot's failure to correctly judge his rate of descent and his failure to initiate his level off soon enough to keep the helicopter from impacting the terrain. Factors include hilly terrain near the edge of the field he was spraying.
- [NTSB FTW98LA400](https://openairdocs.org/ntsb/FTW98LA400.md): Bell 47-G-2 · Ardmore, OK · Accident · No injuries · Limited investigation · Final report · Sep 17, 1998 · N1575 · Substantial damage
  > The pilots failure to maintain clearance with terrain and the ensuing loss of control.
- [NTSB FTW96TA383](https://openairdocs.org/ntsb/FTW96TA383.md): Bell 47G-3B-1 · Rangely, CO · Accident · No injuries · Final report · Sep 10, 1996 · N1335X · Substantial damage
  > the pilot's excessive cyclic control input during a low altitude operation, and his failure to maintain altitude/clearance from high vegetation (sage brush). The proximity of high vegetation was a related factor.
- [NTSB LAX96LA263](https://openairdocs.org/ntsb/LAX96LA263.md): Bell 47G3 · Wasco, CA · Accident · No injuries · Limited investigation · Final report · Jul 6, 1996 · N154PG · Substantial damage
  > the pilot's failure to maintain adequate engine rpm during an aerial application flight.
- [NTSB NYC92LA159](https://openairdocs.org/ntsb/NYC92LA159.md): Bell 47G-3B-1 · West Mifflin, PA · Accident · No injuries · Limited investigation · Final report · Aug 12, 1992 · N2070P · Substantial damage
  > A yaw for unknown reason(s) which resulted in the tail rotor contacting the dirt bank and a loss of control. A factor related to the accident was the decision of the pilot to operate in close vicinity to the dirk bank.
- [NTSB FTW92LA026](https://openairdocs.org/ntsb/FTW92LA026.md): Bell 47G3B2A · Texarkana, TX · Accident · Serious injuries · Limited investigation · Final report · Nov 24, 1991 · N8134J · Substantial damage
  > The pilot's failure to maintain proper terrain clearance during takeoff. A factor was his lack of total experience in helicopters.
- [NTSB CHI91DER05](https://openairdocs.org/ntsb/CHI91DER05.md): Bell 47G3B1 · Lasalle, MN · Accident · No injuries · Final report · Jun 11, 1991 · N73284 · Substantial damage
  > The pilot's failure to maintain adequate clearance from the terrain. A related factor is the pilot's misjudged altitude above the crop.
- [NTSB FTW90DPA03](https://openairdocs.org/ntsb/FTW90DPA03.md): Bell-Moore 47G-2A · Sivell Bend, TX · Accident · No injuries · Final report · May 8, 1990 · N25126 · Substantial damage
  > Clearance was not maintained by the pilot-in-command.
- [NTSB FTW87GA083](https://openairdocs.org/ntsb/FTW87GA083.md): Bell 47G-3B-1 · Odessa, TX · Accident · No injuries · Final report · Mar 21, 1987 · N62462 · Substantial damage
  > Investigation reveals the helicopter touched down on the heel of its skids, left skid first, and at a slightly low rotor RPM. The tail boom then moved upward while the main rotor blades flexed downward. The main rotor blades contacted and severed the tail…
- [NTSB LAX83LA053](https://openairdocs.org/ntsb/LAX83LA053.md): Bell TH-13T · Phoenix, AZ · Accident · Serious injuries · Limited investigation · Final report · Dec 8, 1982 · N3001F · Substantial damage
  > After a practice spray turn, the helicopter collided with the ground during recovery from a descent back into the field. No discrepancies were reported with the airframe, engine or weather conditions. The pilot was quoted as saying he refrained from pulling…

## 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" = 230))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41526&occurrence=230

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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.