# NTSB investigations: Lycoming IO-720 series, 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 SEA87LA016](https://openairdocs.org/ntsb/SEA87LA016.md): Piper PA-24-400 · Oregon City, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 2, 1986 · N8419P · Substantial damage
  > Shortly after takeoff, an eng failure occurred. The plt elected to make a forced lndg on a freeway. During the landing, the acft collided with two vehicles. An inspection revealed an eng oil line had ruptured which led to oil exhaustion. Evidence indicated…
- [NTSB CHI86LA153](https://openairdocs.org/ntsb/CHI86LA153.md): Piper PA-36-375 · Breckenridge, MN · Accident · No injuries · Limited investigation · Final report · Jun 13, 1986 · N6184A · Substantial damage
  > Aircraft collided with a truck while engaged in aerial application work. Pilot was unable to maintain control and the aircraft collided with terrain after an uncontrolled descent. Investigation revealed that the aileron had separated due to the collision.
- [NTSB MIA86LA179](https://openairdocs.org/ntsb/MIA86LA179.md): Piper PA-24-400 · St.Augustine, FL · Accident · No injuries · Limited investigation · Final report · Jun 11, 1986 · N8495P · Substantial damage
  > A forced ldg was made after the eng failed while cruising at 8000 ft. an exam of the eng revealed that the top of the crankcase was cracked & a hole was in the top of the case at the no. 2 cylinder. The bottom of the cap of the no. 2 connecting rod had broken…

## 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 ('41546'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41546&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.