# NTSB investigations: Continental GTSIO-520-C, 1991

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 DEN91LA136](https://openairdocs.org/ntsb/DEN91LA136.md): Cessna 421B · Pagosa Springs, CO · Accident · No injuries · Limited investigation · Final report · Aug 16, 1991 · N80RS · Substantial damage
  > Inadequate preflight of the aircraft by the pilot in command. A factor was: failure of the pilot in command to properly latch the cargo door.
- [NTSB DEN91LA101](https://openairdocs.org/ntsb/DEN91LA101.md): Cessna 421B · Colorado Spring, CO · Accident · No injuries · Limited investigation · Final report · Jul 17, 1991 · N768RA · Substantial damage
  > A fractured fuel line and an improperly performed annual inspection.
- [NTSB MIA91FA172](https://openairdocs.org/ntsb/MIA91FA172.md): Cessna 411 · North Ft. Myers, FL · Accident · Serious injuries · Field investigation · Final report · Jun 28, 1991 · N4940T · Destroyed
  > The pilot in commands failure to follow emergency procedures and his failure to maintain airspeed following loss of power in one engine resulting in an inadvertent stall and the inflight loss of control with subsequent inflight collision with an object and…
- [NTSB NYC91LA108](https://openairdocs.org/ntsb/NYC91LA108.md): Cessna 402A · Albany, NY · Accident · No injuries · Limited investigation · Final report · Apr 7, 1991 · N104EC · Substantial damage
  > A collapse of the nose gear due to a failure of the nose gear trunion.
- [NTSB LAX91LA142](https://openairdocs.org/ntsb/LAX91LA142.md): Cessna 421 · El Monte, CA · Accident · No injuries · Limited investigation · Final report · Mar 23, 1991 · N4071L · Substantial damage
  > The pilot retracting the landing gear during the landing roll.
- [NTSB LAX91LA129](https://openairdocs.org/ntsb/LAX91LA129.md): Cessna 421B · Tucson, AZ · Accident · Serious injuries · Limited investigation · Final report · Mar 12, 1991 · N924MD · Substantial damage
  > The fatigue failure of the right engine turbo exhaust clamp, and, the failure of the flying pilot to complete the single engine emergency procedures in a timely manner. A factor in the accident was the failure of the pilot in command to adequately supervise…
- [NTSB FTW91FA027](https://openairdocs.org/ntsb/FTW91FA027.md): Cessna 421B · Muskogee, OK · Accident · 6 fatal · Field investigation · Final report · Jan 6, 1991 · N421H · Destroyed
  > The pilot's failure to maintain control of the aircraft, due to spatial disorientation. Factors related to the accident were: darkness, adverse weather conditions, and the pilot's physical impairment from the chronic sinus infection.

## 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") = 1991
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('17035'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=17035&year=1991

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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.