# NTSB investigations: Hughes 269C, IL

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 CEN10LA560](https://openairdocs.org/ntsb/CEN10LA560.md): Schweizer 269C · Schaumburg, IL · Accident · No injuries · Limited investigation · Final report · Sep 20, 2010 · N34LB · Substantial damage
  > The in-flight separation of the left aft cluster fitting assembly following the loss of torque on the lock nut due to a manufacturing defect.
- [NTSB CHI92LA222](https://openairdocs.org/ntsb/CHI92LA222.md): Hughes 269C · Aurora, IL · Accident · No injuries · Limited investigation · Final report · Aug 1, 1992 · N58335 · Substantial damage
  > Fatigue fracture of the engine crankshaft resulting in loss of power. Factors were the pilot's excessive descent and his lack of total experience.
- [NTSB CHI89FA112](https://openairdocs.org/ntsb/CHI89FA112.md): Hughes 269C · Lockport, IL · Accident · Minor injuries · Field investigation · Final report · Jun 18, 1989 · N26628 · Destroyed
  > Improper flight technique by the PIC during a takeoff from a confined area.
- [NTSB CHI89DEV06](https://openairdocs.org/ntsb/CHI89DEV06.md): Hughes 269C · Millersville, IL · Accident · No injuries · Final report · Jun 6, 1989 · N7439F · Destroyed
  > Loss of rotor RPM for an undetermined reason during a turn to reverse direction while applying agricultural chemicals.
- [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 CHI89LA029](https://openairdocs.org/ntsb/CHI89LA029.md): Mcdonnell Douglas 269C · Frankfort, IL · Accident · Minor injuries · Limited investigation · Final report · Nov 28, 1988 · N1098P · Substantial damage
  > The helicopter experienced a tree strike with the main rotor blades and then rolled over when it struck the ground during a precautionary landing attempt. The helicopter had been conducting contract power line patrol when the PIC noted an apparent partial…
- [NTSB CHI88DEE07](https://openairdocs.org/ntsb/CHI88DEE07.md): Hughes 269C · Sandwich, IL · Accident · No injuries · Final report · Jul 21, 1988 · N7425F · Substantial damage
  > The plt rprtd that while he was conducting spraying opns, he noted a significant loss of eng power. He made a run-on landing in a bean field. As he landed, the left skid dug into a furrow & the helicopter rolled over. During the investigation, which included…
- [NTSB CHI87LA150](https://openairdocs.org/ntsb/CHI87LA150.md): Hughes 300C · Aurora, IL · Accident · No injuries · Limited investigation · Final report · Jun 17, 1987 · N3625B · Substantial damage
  > While the student & instructor (CFI) were on an instructional flt, a decision was made to practice an autorotation & simulated tail rotor failure. Rprtdly, a smooth touchdown was made, but the helicopter began to vibrate. The CFI electedto get the helicopter…
- [NTSB CHI85FA210](https://openairdocs.org/ntsb/CHI85FA210.md): Hughes 300 · Joliet, IL · Accident · Minor injuries · Field investigation · Final report · May 26, 1985 · N404Z · Destroyed
  > The helicopter experienced extreme vertical vibrations while landing from a hover. Inadvertent ground contact during uncontrolled oscillations resulted in destruction of the helicopter.
- [NTSB CHI85LA197](https://openairdocs.org/ntsb/CHI85LA197.md): Hughes 269 · Stonington, IL · Accident · No injuries · Limited investigation · Final report · May 15, 1985 · N7485F · Destroyed
  > After completing a swath run, the plt maneuvered the helicopter up over a power line, then made a turn-around for another swath run. He stated that as he started the next run, he 'felt the wind push the tail upward forcing the nose downward...' He applied aft…
- [NTSB CHI79FEE06](https://openairdocs.org/ntsb/CHI79FEE06.md): Hughes 269C · West Chicago, IL · Accident · No injuries · Closed · Oct 24, 1978 · N7415F · Substantial damage
- [NTSB CHI78DEV35](https://openairdocs.org/ntsb/CHI78DEV35.md): Hughes 269C · Maroa, IL · Accident · No injuries · Closed · May 26, 1978 · N7473F · Substantial damage
- [NTSB CHI78DEE33](https://openairdocs.org/ntsb/CHI78DEE33.md): Hughes 269C · Mendota, IL · Accident · No injuries · Closed · May 6, 1978 · N7476F · Substantial damage
- [NTSB CHI76FEV50](https://openairdocs.org/ntsb/CHI76FEV50.md): Hughes 269C · Maroa, IL · Accident · No injuries · Closed · Jul 20, 1976 · N7435F · 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."eventStateOrRegion" = 'IL' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470504'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

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

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