ASN Wikibase Occurrence # 385236
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| Date: | Thursday 26 May 2022 |
| Time: | 13:40 LT |
| Type: |  Robinson R44 |
| Owner/operator: | High Tide Helicopters LLC |
| Registration: | N132TC |
| MSN: | 1259 |
| Year of manufacture: | 2002 |
| Total airframe hrs: | 3711 hours |
| Engine model: | Lycoming O-540 F1B5 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | North Myrtle Beach, SC -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Oak Island-Cape Fear Regional Jetport, NC (KSUT) |
| North Myrtle Beach, SC | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The Robinson R44 helicopter, N132TC, was substantially damaged when it was involved in an accident during an instructional flight. The flight instructor and the student pilot were not injured.
Seconds after liftoff to a hover, the helicopter began to 'aggressively shudder.' Loud, rapid reports were heard, and the nose of the helicopter yawed to the left. The instructor assumed control of the helicopter, closed the throttle, and performed an autorotation from a hover, landing the helicopter upright on its skids; however, the airframe sustained substantial damage. The instructor completed an engine shutdown, egressed the helicopter, and noticed that the main rotor was still turning while the tail rotor remained stationary. A cursory examination of the helicopter revealed that the clutch shaft yoke fractured at one of its two bolt lugs where the yoke attached to the flex plate. All other damage depicted appeared to be impact damage from the rotating assemblies left unsecured by the fractured lug.
Examination of the damaged yoke and flexplate in the NTSB materials laboratory revealed a fractured attachment lug on the forward clutch shaft yoke due to fatigue failure with multiple origins.
Probable Cause: The fractured attachment lug on the forward clutch shaft yoke due to fatigue failure with multiple origins.
Accident investigation:
 |
|
Sources:
NTSB ERA22LA256
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2024 08:11 | ASN Update Bot | Added |
| 04-Apr-2024 08:56 | ASN | Updated [Narrative] |
Corrections or additions? ... Edit this accident description
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