# Fatal NTSB investigations: Lycoming GO-435C&D series

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 LAX97FA330](https://openairdocs.org/ntsb/LAX97FA330.md): Ryan Navion B · Pacoima, CA · Accident · 2 fatal · Field investigation · Final report · Sep 26, 1997 · N5241K · Destroyed
  > the dual student's improper positioning of the fuel selector and the CFI's inadequate supervision, which led to a takeoff with the auxiliary fuel tank selected and resulted in fuel starvation. A contributing factor was the position of the nomenclature on the…
- [NTSB BFO89FA069](https://openairdocs.org/ntsb/BFO89FA069.md): Beech B50 · Church Creek, MD · Accident · 3 fatal · Field investigation · Final report · Aug 23, 1989 · N3688B · Destroyed
  > VFR flight into IMC and pilot disorientation, which resulted in the loss of aircraft control. Contributing to the accident was the pilot's lack of instrument experience, darkness, and the adverse weather condition.
- [NTSB FTW84FA047](https://openairdocs.org/ntsb/FTW84FA047.md): Aero Commander 520 · Clines Corners, NM · Accident · 2 fatal · Field investigation · Final report · Nov 9, 1983 · N4116B · Destroyed
  > The non-instrument rated plt was on ferry flt from bartlesville, ok to ontario, CA. An en route stop was made at tucumcari, NM, where the acft was refueled & 14 qts of oil was added to the left eng. The line boy who serviced the acft saw no visible oil leaks…
- [NTSB LAX82FA357](https://openairdocs.org/ntsb/LAX82FA357.md): Aero Commander 520 · Agoura, CA · Accident · 3 fatal · Field investigation · Final report · Sep 26, 1982 · N2622B · Destroyed
  > During departure, the pilot climbed in IFR conditions to 600O ft. after leveling, a frequency change was made and he was cleared to 8000 ft, which he acknowledged. About 2 min later, the controller radioed to the pilot that he was about 4 mi north of the…
- [NTSB OAK70A0012](https://openairdocs.org/ntsb/OAK70A0012.md): Navion B · Ash Meadows, NV · Accident · 2 fatal · Closed · Aug 21, 1969 · N5255K · Destroyed
- [NTSB LAX69A0072](https://openairdocs.org/ntsb/LAX69A0072.md): Aero Comdr 520 · Olberg, AZ · Accident · 1 fatal · Closed · May 28, 1969 · N4127B · Destroyed
- [NTSB NYC69A0008](https://openairdocs.org/ntsb/NYC69A0008.md): Helio H-391B · Royalston, MA · Accident · 2 fatal · Closed · Jul 10, 1968 · N28B · 2 aircraft · Destroyed
- [NTSB DEN68A0014](https://openairdocs.org/ntsb/DEN68A0014.md): Aero-Comdr 520 · Parshall, CO · Accident · 4 fatal · Closed · Aug 9, 1967 · N8000G · Destroyed

## 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41521'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41521&fatal=1

---
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.