N666U — 2004 Robinson Helicopter Company R44 II
DeregisteredChecked against FAA & NTSB records · as of Aug 29, 2026
N666U appears in 1 NTSB accident record (most recent 2022, minor injuries). Registration and accident data compiled from public FAA and NTSB records as of Aug 29, 2026.
Aircraft record
- Serial number
- 10476
- Manufacturer
- Robinson Helicopter Company
- Model
- R44 II
- Year
- 2004
- Category
- Rotorcraft
- Engine
- Lycoming Io-540 Ser
- Registration
- Deregistered
Accident & incident history
The flight instructor’s failure to maintain control of the helicopter during the takeoff, which resulted in a dynamic rollover.
Registration timeline
Ownership and registration events for this airframe (the 2004 Robinson Helicopter Company R44 II).
- Jun 8, 2023deregistered — Sale Reported
Earlier aircraft on this N-number
The tail number N666U was previously assigned to a different aircraft. A registration number can be reused across unrelated airframes over decades — these are not the 2004 Robinson Helicopter Company R44 II above.
- until Dec 13, 20061989 Robinson Helicopter R22 BETA (s/n 1036)
Frequently asked
- Has N666U been in an accident?
- Yes. N666U appears in 1 NTSB accident record, the most recent in 2022.
- What kind of aircraft is N666U?
- N666U is a 2004 Robinson Helicopter Company R44 II (rotorcraft), serial number 10476.
The full N666U report
$12 $29 launch pricing
- Full NTSB investigation narratives for all 1 record — the complete text, not just the cause line
- Pre-buy question list generated from this aircraft’s actual records
- Complete registration & deregistration timeline, print-ready
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