# Accident 20120722016159A: Yamokoski William GLASTAR, Chicago, IL, July 22, 2012

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 22, 2012, 13:00 local time
- Place: Chicago, IL
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 41.6097° N, 87.4078° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=41.6097&lon=-87.4078&mi=10
- Aircraft: N4970Y, registered now (https://openairdocs.org/aircraft/N4970Y) (OpenAirDocs)
- Registry model: Yamokoski William GLASTAR (registry code 05614QM, https://openairdocs.org/model/yamokoski-william-glastar) (OpenAirDocs)
- Registry engine: Subaru ALL MDLS A/B (registry code 59050, https://openairdocs.org/engine/subaru-all-mdls-a-b) (OpenAirDocs)
- Reported make and model: YAMOKOSKI WILLIAM GLASTAR
- Reported engine: SUBARU ALL MDLS A/B
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- NTSB investigation: [NTSB CEN12LA470](https://openairdocs.org/ntsb/CEN12LA470) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20120722016159A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON JULY 22, 2012, AT APPROXIMATELY 13:00 CDT, N4970Y AN EXPERIMENTAL AMATEUR BUILT GLASTAR, ENROUTE FROM OSHKOSH, WI TO BENTON HARBOR, MI DECLARED AN EMERGENCY TO GARY TOWER DUE TO LOSS OF ENGINE POWER. THE AIRCRAFT LANDED IN AN EMPTY DREDGE FIELD ALONG LAKE MICHIGAN NORTH OF CALUMET PARK. DURING LANDING ROLLOUT THE NOSE LANDING GEAR SUNK INTO THE SOFT TERRAIN FLIPPING THE AIRCRAFT ONTO ITS BACK.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN12LA470](https://openairdocs.org/ntsb/CEN12LA470), Jul 22, 2012: Yamokoski William Glastar (N4970Y), Chicago, IL, substantial damage. Probable cause: Failure of the automotive engine's reduction gearbox while in cruise flight.

## Other reports on N4970Y (1)

Matched to the same aircraft by N-number and date.

- [Accident 20050821024269A](https://openairdocs.org/incident/20050821024269A), Aug 21, 2005: Amtr GLASTAR (N4970Y), Marcellous, MI, Substantial damage. (-23) Pilot stated that aircraft engine started to run rough and quit running at 2800 feet MSL. Pilot landed aircraft in corn field. Aircraft flipped over upon…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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