# NTSB investigations: Cessna 421: Loss of engine power(partial) - mech failure/malf

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 CHI96FA146](https://openairdocs.org/ntsb/CHI96FA146.md): Cessna 421 · Bernard, IA · Accident · 3 fatal · Field investigation · Final report · Apr 29, 1996 · N341DA · Destroyed
  > the pilot's operation of the airplane with known deficiencies, subsequent loss of oil from the left engine, and the pilot's failure to maintain minimum controllable airspeed (VMC), while diverting to an alternate airport. Factors relating to the accident…
- [NTSB DEN91LA066](https://openairdocs.org/ntsb/DEN91LA066.md): Cessna 421 · Englewood, CO · Accident · Minor injuries · Limited investigation · Final report · May 1, 1991 · N18DF · Substantial damage
  > Power loss on both engines as a result of exhaust system failure.
- [NTSB LAX89LA217](https://openairdocs.org/ntsb/LAX89LA217.md): Cessna 421 · Picacho, AZ · Accident · Minor injuries · Limited investigation · Final report · Jun 17, 1989 · N421S · Destroyed
  > Failure of the number three exhaust valve on the left engine. A major factor was the high density altitude where the airplane would not operate on single engine.
- [NTSB NYC88FA181](https://openairdocs.org/ntsb/NYC88FA181.md): Cessna 421 · Taunton, MA · Accident · 1 fatal · Field investigation · Final report · Jul 14, 1988 · N825DW · Destroyed
  > Bfr rchg his destn, the plt adzd apch ctl that his rgt eng was 'blowing some smoke' & losing oil pressure. Vectors were provided for a visual apch, but there were low clouds in the area & vis was restricted due to haze. After reaching the vcnty of the arpt,…

## 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.aircraft_model_code IN ('2076010')
    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" = 352))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=2076010&occurrence=352

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