Staging copy. The live site is at https://staging.data.eflight.com.
eFlight RegistryFAA data, updated daily
Registered aircraft · FAA record as of September 25, 2026
N121SD

Monnett SONERAI-IIB

Valid Texas

N121SD is a Monnett SONERAI-IIB, a fixed-wing airplane with one motor with a piston engine. It has 2 seats. It is registered to an individual in New Braunfels, Texas. The registration is valid: it was issued on May 29, 2026 and expires on May 31, 2033. It holds an experimental airworthiness certificate for amateur built, dated February 26, 1980.

Aircraft

Maker
Monnett
Model
SONERAI-IIB
Serial number
2-2B
Type
Fixed-wing, single engine
Power
Piston (reciprocating), 1 motor · Volkswagen CONVERSION · 36 hp
Seats
2
Year built
Not given
Cruising speed
85 mph
Transponder code
A058FD (octal 50054375)

Registration

Status
Valid registration
Certificate issued
May 29, 2026
Expires
May 31, 2033
Last FAA action
May 29, 2026
Airworthiness
Experimental · Amateur built · February 26, 1980
FAA region
Southwestern
FAA record id
00451692

Owner as the FAA publishes it

Name
Doiron Stephen R
Type
Individual
Address
1330 Homestead Cv
New Braunfels, TX 78132-0131

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.

Earlier use of this number 1

2018-01-11Sawyer Steve M GOLDWING · Registration expired, pending cancellation

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