# Accident 20090512047139A: Robinson He R44, Iliamna, AK, May 12, 2009

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 12, 2009, 22:30 local time
- Place: Iliamna, AK
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Operator: AK1J
- Location: 60.0711° N, 156.7211° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=60.0711&lon=-156.7211&mi=10
- Aircraft: N7196H, registered now (https://openairdocs.org/aircraft/N7196H) (OpenAirDocs)
- Registry model: Robinson Helicopter R44 (registry code 7640120, https://openairdocs.org/model/robinson-helicopter-r44) (OpenAirDocs)
- Registry engine: Lycoming 0-540 series (registry code 41532, https://openairdocs.org/engine/lycoming-0-540-series) (OpenAirDocs)
- Reported make and model: ROBINSON HE R44
- Reported engine: LYCOMING 0-540 SERIES
- People aboard: 3
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 4,800 total, 364 in this make and model, 31 in the last 90 days
- NTSB investigation: [NTSB ANC09GA040](https://openairdocs.org/ntsb/ANC09GA040) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20090512047139A

## Narrative

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

(NOTE: NARRATIVE SUBJECT TO AMENDMENT AS INVESTIGATION PROCEEDS - SJS 06/02/09.)  AIRCRAFT WAS LOADED WITH-IN 50 LBS OF GROSS WIEGHT, WITH CG LOCATED 1 INCH FORWARD OF THE FORWARD CG LIMIT.  WHILE IN CRUISE FLIGHT AND AT APPROXIMATELY 100 KIAS, "CHUGGING" OF THE MAIN ROTOR OCCURRED.  IN LIEU OF POWERING OUT OF THE "CHUGGING" THE PILOT IN COMMAND ELECTED TO LAND THE AIRCRAFT.  THE RESULTING UNCONTROLLED LANDING RESULTED IN SUBSTANTIAL DAMAGE.

## 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 ANC09GA040](https://openairdocs.org/ntsb/ANC09GA040), May 12, 2009: Robinson Helicopter R44 (N7196H), Iliamna, AK, substantial damage. Probable cause: The main rotor transmission mount design, which resulted in an in-flight vibration/oscillation, and damage to the helicopter during an emergency descent and hard landing. Contributing to the accident…

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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