# NTSB investigations: Lycoming TVO-435-GIA, 1986

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 DEN87LA019](https://openairdocs.org/ntsb/DEN87LA019.md): Bell 47G-3B-1 · Goshen, UT · Accident · No injuries · Limited investigation · Final report · Nov 10, 1986 · N47042 · Substantial damage
  > The plt was practicing power recovery autorotations then attempted one power off, full stop. The plt allowed the main rotor RPM to decay during approach and took no corrective action. The acft landed hard with slight forward motion and the plt applied aft…
- [NTSB SEA86LA182](https://openairdocs.org/ntsb/SEA86LA182.md): Bell 47G3B1 · Albany, OR · Accident · Serious injuries · Limited investigation · Final report · Jul 29, 1986 · N9417A · Substantial damage
  > A Bell 47G3B1 crashed into the south santiam river after contacting power lines while on an instructional flight. The CFI (helicopter) plt received serious injuries and the private plt (airplane) helicopter student received minor injuries. The helicopter…
- [NTSB SEA86LA176](https://openairdocs.org/ntsb/SEA86LA176.md): Bell 47G-3B1 · Burbank, WA · Accident · 1 fatal · Limited investigation · Final report · Jul 23, 1986 · N1197W · Minor damage
  > The helicopter had landed for reloading and was stationary with rotors idling. A ground loader person approached the helicopter over a small sandy knoll and was struck by the main rotor, sustaining fatal injury.
- [NTSB ATL86LA138](https://openairdocs.org/ntsb/ATL86LA138.md): Bell 47G-3B · Red Bay, AL · Accident · No injuries · Limited investigation · Final report · May 19, 1986 · N73269 · Substantial damage
  > The pilot had completed a dispensing operation and was returning to the ag staging area to refuel. As the helicopter hovered towards the parked refueling vehicle, the main rotor blades struck a metal structure attached to the truck. The pilot stated that the…
- [NTSB MIA86LA152](https://openairdocs.org/ntsb/MIA86LA152.md): Bell 47G-3B-1 · Panama City, FL · Accident · No injuries · Limited investigation · Final report · May 9, 1986 · N1159W · Substantial damage
  > While approaching to land during a sightseeing flt a loss of eng pwr was experienced and an autorotation was made 70 ft short of the helipad. During touchdown, the main rotor struck and severed the tail boom. The plt stated after touchdown the eng continued…
- [NTSB DEN86LA119](https://openairdocs.org/ntsb/DEN86LA119.md): Bell 47G-3B-2 · Santa Fe, NM · Accident · No injuries · Limited investigation · Final report · Apr 25, 1986 · N4073G · Substantial damage
  > According to the student plt, he was attempting to hover the helicopter when he encountered turbulence. The student plt stated that the hard landing which followed resulted in spreading the skids & severing the tailboom.
- [NTSB SEA86LA105](https://openairdocs.org/ntsb/SEA86LA105.md): Bell 47G3B1 · Albany, OR · Accident · No injuries · Limited investigation · Final report · Apr 15, 1986 · N9417A · Substantial damage
  > The plt reported that after aprx 15 minutes of flt, the eng sputtered 2 or 3 times. An autorotation was performed onto rough terrain during which the tail rotor drive shaft was damaged by the main rotor blades. Post accident inspection revealed a hole in the…
- [NTSB DEN86LA079](https://openairdocs.org/ntsb/DEN86LA079.md): Bell 47G3 B-2 · Grand Junction, CO · Accident · Minor injuries · Limited investigation · Final report · Feb 18, 1986 · N1424W · Substantial damage
  > The plt stated that while turning to the intended landing area, the helicopter he was piloting encountered both downdrafts & tailwind. The plt indicated the helicopter settled until grnd contact.

## 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") = 1986
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41526'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41526&year=1986

---
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.