N21SG — 1976 Cessna 421C
Active registrationChecked against FAA & NTSB records · as of Jul 16, 2026
N21SG appears in 1 NTSB accident record (most recent 2016, no injuries). Registration and accident data compiled from public FAA and NTSB records as of Jul 16, 2026.
Aircraft record
- Serial number
- 421C0039
- Manufacturer
- Cessna
- Model
- 421C
- Year
- 1976
- Category
- Fixed wing multi-engine
- Engine
- Cont Motor Gtsio-520 Ser
- Registration
- Active
- Registered to
- Two One Sierra Golf Llc — Seattle, WA
Accident & incident history
A runway overrun for reasons that could not be determined based on the available information.
Registration timeline
Ownership and registration events for this airframe (the 1976 Cessna 421C).
- Sep 18, 2012registered — Two One Sierra Golf Llc
Frequently asked
- Has N21SG been in an accident?
- Yes. N21SG appears in 1 NTSB accident record, the most recent in 2016.
- What kind of aircraft is N21SG?
- N21SG is a 1976 Cessna 421C (fixed wing multi-engine), serial number 421C0039.
- Who is N21SG registered to?
- N21SG is registered to Two One Sierra Golf Llc of Seattle, WA. Registration status: active.
The full N21SG 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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