ASN Wikibase Occurrence # 42618
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| Date: | Monday 16 May 1994 |
| Time: | 16:02 LT |
| Type: |  Bell 47G-2 |
| Owner/operator: | Cypert, Gerald |
| Registration: | N47GY |
| MSN: | 2207 |
| Year of manufacture: | 1958 |
| Total airframe hrs: | 7844 hours |
| Engine model: | Lycoming VO-435-A1D |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Tulsa, OK -
 United States of America
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Jenks, OK (KRVS) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WITNESSES HEARD A LOUD NOISE AND SAW AN OBJECT SEPARATE FROM THE SECOND OF TWO HELICOPTERS. THIS HELICOPTER THEN IMPACTED INVERTED IN THE BACK YARD OF A RESIDENCE. THE LEFT SYNCHRONIZED ELEVATOR AND END CAP WERE FOUND 240 FEET AWAY. AN INDENTATION ON THE LEADING EDGE OF ONE OF THE MAIN ROTOR BLADES MATCHED THAT OF THE END CAP. THE PILOT OF THE FIRST HELICOPTER SAID HE HAD WARNED THE SECOND PILOT OF A FLOCK OF BIRDS, AND THAT HE HAD TO BANK SHARPLY TO AVOID HITTING THEM. WHEN HE RECEIVED NO REPLY, HE TURNED AROUND BUT THE OTHER HELICOPTER WAS NOT IN SIGHT.
Probable Cause: IN FLIGHT LOSS OF CONTROL DUE TO THE PILOT'S IMPROPER USE OF THE CYCLIC AND COLLECTIVE CONTROLS WHEN HE MANEUVERED ABRUPTLY TO AVOID COLLIDING WITH A FLOCK OF BIRDS. FACTORS WERE THE BIRDS AND THE INFLIGHT SEPARATION OF THE LEFT SYNCHRONIZED ELEVATOR.
Accident investigation:
 |
|
Sources:
NTSB FTW94FA158
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 07:35 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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