N4123D — 1957 Helio H-391B
Active registrationChecked against FAA & NTSB records · as of Jul 28, 2026
N4123D has no NTSB accident records on file. Registration data compiled from public FAA records as of Jul 28, 2026.
Aircraft record
- Serial number
- 042
- Manufacturer
- Helio
- Model
- H-391B
- Year
- 1957
- Category
- Fixed wing single-engine
- Engine
- Lycoming Go-435c&d Ser
- Registration
- Active
- Registered to
- Thun Karl J — Graham, WA
Accident & incident history
No NTSB accident records on file.
Registration timeline
Ownership and registration events for this airframe (the 1957 Helio H-391B).
- Mar 3, 1978registered — Thun Karl J
Frequently asked
- Has N4123D been in an accident?
- No NTSB accident records are on file for N4123D.
- What kind of aircraft is N4123D?
- N4123D is a 1957 Helio H-391B (fixed wing single-engine), serial number 042.
- Who is N4123D registered to?
- N4123D is registered to Thun Karl J of Graham, WA. Registration status: active.
The full N4123D report
$12 $29 launch pricing
- Full NTSB investigation narratives — 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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