Probable cause
A loss of main rotor rpm for undetermined reasons.
NTSB analysis
The certificated flight instructor (CFI) and his passenger were flying about 2 miles offshore. The helicopter had just completed a turn at about 100 feet above the water when the low main rotor rpm horn sounded. When an adjustment of the throttle failed to remedy the situation, the CFI entered an autorotation. The tail of the helicopter stuck the water during the flare, which resulted in the helicopter entering an uncontrollable spin. The helicopter immediately sank and at the time of this writing, has not been located or recovered. The helicopter’s flight manual showed that at the time of the accident, the flight was being operated within a region of performance in the height-velocity diagram that the manufacturer recommended avoiding. A review of the helicopter’s maintenance records did not reveal any discrepancies with the helicopter prior to the accident flight.
Text from the NTSB. Open the NTSB docket for ERA10LA190 for the full record.
Event
- Date
- Mar 28, 2010
- Type
- Accident
- Place
- Miami, Florida
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Robinson R22
- N-number
- N72377
- Category
- Helicopter
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.