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ASN Wikibase Occurrence # 175371
 
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Date:29-FEB-2004
Time:13:00
Type:Silhouette image of generic EXEC model; specific model in this crash may look slightly different
Geoffrion Rotorway Exec 162
Owner/operator:Private
Registration: N198BG
MSN: 1
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Medina, OH -   United States of America
Phase: Landing
Nature:Private
Departure airport:Atwater, OH (NONE)
Destination airport:Medina, OH (NONE)
Investigating agency: NTSB
Narrative:
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.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040309X00297&key=1

Location


Revision history:

Date/timeContributorUpdates
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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