Probable cause
The pilot's failure to disconnect the ground power unit prior to takeoff.
NTSB analysis
The pilot stated that during takeoff from a dolly, the helicopter nosed down, contacted the ground, and collapsed the landing skids. Post-accident inspection revealed that the helicopter had not been disconnected from the ground power unit (GPU) prior to take off. The company did not have any written procedures regarding the placement or operation of the GPU. On this flight, the GPU had been placed behind the helicopter due to its "proximity to the taxiway." The pilot did not report any mechanical malfunctions or anomalies with the helicopter.
Text from the NTSB. Open the NTSB docket for ERA09CA485 for the full record.
Event
- Date
- Aug 26, 2009
- Type
- Accident
- Place
- White Plains, New York
- Nearest airport
- Westchester County Airport (HPN)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Bell 206L-3
- N-number
- N22ZA
- Category
- Helicopter
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Positioning
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.