N4121D

Pending

1957 HELIO H-391B

Fixed wing single engineWeirsdale, FL

N4121D is a 1957 Helio H-391B (fixed wing single engine) with serial number 041, registered in Weirsdale, FL. It is powered by a Lycoming GO-435C&D SER rated at 260 hp. Its airworthiness certificate is in the standard class, issued Jan 4, 1957. It is one of 16 H-391B aircraft in the FAA registry, 1 of them registered in Florida.

FAA status: Registration pending. There is no expiration date on this record.

Registration

FAA status
Registration pending
Registrant type
Individual
Registered owner
Individual owner, name not shown
Location
Weirsdale, FL
Local FAA office (FSDO)
Orlando FSDO (ORL FSDO) · (407) 487-7000
Last FAA action
Aug 8, 2026
Mode S code (hex)
A4DE0D
Mode S code (octal)
51157015
Official record
registry.faa.gov

Aircraft

Manufacturer
HELIO
Model
H-391B
Type certificate (TCDS)
1A8 (Helio Alaska Inc.)
Year manufactured
1957
Serial number
041
Aircraft type
Fixed wing single engine
Engine type
Reciprocating
Engine
LYCOMING GO-435C&D SER (260 hp)
Engines / seats
1 / 4
Weight class
Up to 12,499 lb
Airworthiness
Standard since Jan 4, 1957