ASN Wikibase Occurrence # 175371
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| Date: | Sunday 29 February 2004 |
| Time: | 13:00 |
| Type: |  Geoffrion Rotorway Exec 162 |
| Owner/operator: | Private |
| Registration: | N198BG |
| MSN: | 1 |
| Total airframe hrs: | 10 hours |
| Engine model: | Rotorway RI-162 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Medina, OH -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Atwater, OH |
| Medina, OH | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The amateur built helicopter was in cruise flight at an altitude 1,100 feet above the ground, when the pilot heard a pop and loud bang. He immediately initiated an autorotation and felt that he had the helicopter under control, until it began to pitch down. Due to strong vibrations, the pilot was not able to read any of the instruments, including rotor RPM. The helicopter struck trees and came to rest in a residential area. During the impact, a main rotor blade struck the tail boom in the area of the horizontal stabilizer. Examination of the helicopter revealed that the tail boom was severed, the tail rotor drive pulley was split in half, the tail rotor drive belts were broken, and the third bulkhead was fractured into several pieces. All of the main rotor drive belts and pulleys remained attached. Continuity of the cyclic and collective controls was confirmed; and no engine abnormalities were noted. One tail rotor blade was severed at the pitch pin. Both tail rotor blades exhibited dents; however, they did not display the rearward bending of spar and skin that would be consistent with blade rotation at impact. Due to the impact damage, the pre-impact condition of the tail rotor drive system could not be determined.
Probable Cause: A failure of the helicopter's tail rotor drive system for undetermined reasons.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040309X00297&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Apr-2015 15:44 | Noro | Added |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 17:41 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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