# NTSB investigations: Hughes 269C: Loss of engine power(total) - 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 SEA96FA130](https://openairdocs.org/ntsb/SEA96FA130.md): Hughes 269C · Eldon, WA · Accident · 1 fatal · Field investigation · Final report · Jun 19, 1996 · N7400F · Destroyed
  > fatigue failure of the connecting rod cap, which resulted in loss of engine power and ditching at sea.
- [NTSB FTW95GA090](https://openairdocs.org/ntsb/FTW95GA090.md): Hughes 269C · Dumont, TX · Accident · No injuries · Final report · Jan 12, 1995 · N796 · Destroyed
  > The loss of engine power due to overstress fractures of the #3 cylinder connecting rod cap bolts. The origin of the fractures could not be determined.
- [NTSB BFO91LA014](https://openairdocs.org/ntsb/BFO91LA014.md): Hughes 269C · Louisville, KY · Accident · No injuries · Limited investigation · Final report · Nov 15, 1990 · N9280F · Substantial damage
  > Fatigue failure of the number 1 cylinder connecting rod.
- [NTSB MKC89LA200](https://openairdocs.org/ntsb/MKC89LA200.md): Hughes 269C · Bloomington, MN · Accident · No injuries · Limited investigation · Final report · Sep 28, 1989 · N95KS · Substantial damage
  > Failure of the engine crankshaft. The light conditions at dawn and the vehicles were considered to be contributing factors.
- [NTSB LAX89LA246](https://openairdocs.org/ntsb/LAX89LA246.md): Hughes 269C · Kalapana, HI · Accident · Serious injuries · Limited investigation · Final report · Jul 25, 1989 · N58344 · Substantial damage
  > The loss of engine power due to the failure of the engine exhaust valve in the no. 2 cylinder and the disregard of the Lycoming service bulletin by company maintenance personnel. Contributing to the accident was the high vegetation and trees located at the…
- [NTSB CHI89FA062](https://openairdocs.org/ntsb/CHI89FA062.md): Hughes 269C · De Kalb, IL · Accident · Serious injuries · Field investigation · Final report · Mar 22, 1989 · N8642F · Destroyed
  > Fatigue failure of the number four connecting rod which resulted in an engine failure. Factors in the accident were the broken ring in the number one piston and a deteriorated center main bearing.
- [NTSB ATL89FA035](https://openairdocs.org/ntsb/ATL89FA035.md): Hughes 269C · Mohawk, TN · Accident · 2 fatal · Field investigation · Final report · Nov 14, 1988 · N9575F · Destroyed
  > The helicopter had landed at a private airstrip and the instructor deplaned. The dual student remained in the helicopter with the engine running. The CFI reboarded and the student made the takeoff. Later, on downwind in traffic pattern, a witness reported a…
- [NTSB SEA86LA026](https://openairdocs.org/ntsb/SEA86LA026.md): Hughes 269C · Brooks, OR · Accident · No injuries · Limited investigation · Final report · Nov 24, 1985 · N58181 · Substantial damage
  > A total loss of power occurred due to the number 4 cylinder failing. A tail boom strike occurred during a hard landing in a parking lot, severing the tail boom.
- [NTSB MKC85LA115](https://openairdocs.org/ntsb/MKC85LA115.md): Hughes 269C · West Liberty, IA · Accident · No injuries · Limited investigation · Final report · May 29, 1985 · N8976F · Substantial damage
  > On a downwind swath run the helicopter experienced an eng failure and the plt entered an autorotation. The plt then made a hard landing which resulted in substantial damage. Inspection of the engine revealed that the nut which retains the gear to crankshaft…

## 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 ('4470504')
    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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470504&occurrence=351

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