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Registered aircraft · FAA record as of September 25, 2026
N21SR

Oneill Terrence Z

Valid Colorado

N21SR is an Oneill Terrence Z, a fixed-wing airplane with one motor with a piston engine. It has 4 seats. It is registered to an individual in Niwot, Colorado. The registration is valid: it was issued on July 21, 1987 and expires on October 31, 2027. No airworthiness certificate is on file, which is normal for drones and for aircraft still being built or tested.

Aircraft

Maker
Oneill Terrence
Model
Z
Serial number
1
Type
Fixed-wing, single engine
Power
Piston (reciprocating), 1 motor
Seats
4
Year built
Not given
Transponder code
A1B8C9 (octal 50334311)

Registration

Status
Valid registration
Certificate issued
July 21, 1987
Expires
October 31, 2027
Last FAA action
July 1, 2026
Airworthiness
None on file
FAA region
Northwest Mountain
FAA record id
00775580

Owner as the FAA publishes it

Name
Oneill Terrence
Type
Individual
Address
7659 Nikau Dr
Niwot, CO 80503-8671

Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.

Documents on file 0

No bills of sale, loans or other documents are indexed against this tail number.

Source: FAA Civil Aviation Registry, Releasable Aircraft Database, September 25, 2026. See this record on the FAA site · This record as data