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
N421GB

Alexander Schleicher ASK 21

Valid Electric gliderMassachusetts

N421GB is an Alexander Schleicher ASK 21, a glider with no engine, built in 2016. It has 2 seats. It is registered to Greater Boston Soaring Club INC, a corporation in Sterling, Massachusetts. The registration is valid: it was issued on August 12, 2016 and expires on August 31, 2029. It holds a standard airworthiness certificate for normal, dated September 14, 2016.

Alexander Schleicher: AS 33 ME

Aircraft

Maker
Alexander Schleicher (Germany)
FAA spelling: ALEXANDER SCHLEICHER GMBH & CO
Model
ASK 21
Serial number
21937
Type
Glider
Power
None · None NONE
Seats
2
Year built
2016
Transponder code
A4FFEE (octal 51177756)

Registration

Status
Valid registration
Certificate issued
August 12, 2016
Expires
August 31, 2029
Last FAA action
August 25, 2023
Airworthiness
Standard · Normal · September 14, 2016
FAA region
New England
FAA record id
01203163

Owner as the FAA publishes it

Name
Greater Boston Soaring Club INC
Type
Corporation
Address
PO Box 655
Sterling, MA 01564-0655

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

2003-08-11Cessna 421A · Triennial registration form was mailed and has not been returned by the Post Office

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