The U.S. aircraft register, updated daily

No free picture of N51641 or its model is known to the site yet; spotters' pictures may be on Planespotters · JetPhotos · Airliners.net. Operator or owner? Send your own picture.

Registered aircraft · FAA record as of October 29, 2026
N51641

Flightstar IISC

ValidFAA registration status code V: Valid registration. All codesWisconsin

N51641 is a Flightstar IISC, a fixed-wing airplane with one motor with a two-stroke engine. It has 2 seats. It is registered to an individual in Poplar, Wisconsin. The registration is valid: it was issued on May 31, 2007 and expires on July 31, 2027. It holds an experimental airworthiness certificate for registered before jan 31, 2008, dated November 13, 2007.

Where is it now checking the live feed…

Checking the volunteer receiver network for a recent position…

Aircraft broadcast their own position; volunteer receivers pool what they hear. Owners who have asked the FAA not to be displayed are not shown.

Flight history: where it flew in the last seven days · follow it on the live map

Aircraft

Maker
Flightstar
Model
IISC · all IISCs and related versions
Built of
aluminium tube and fabric
An ultralight-style airframe: bolted aluminium tubing under sailcloth or fabric, the construction of weight-shift trikes and the lightest two-seaters. An ultralight-style airframe: bolted aluminium tubing under sailcloth. This is how the Flightstar IISC family is built; the FAA does not record construction for each aircraft, and the type certificate data sheet is the authority for this one.
Serial number
306
Type
Fixed-wing, single engineFAA type of aircraft code 4 (the FAA's broad category for the airframe). Every aircraft with this code · All codes
Power
Two-cycle pistonFAA type of engine code 7 (what powers it, as the FAA classes engines). Every aircraft with this code · All codes, 1 motor · Rotax 503 DCDI · 52 hp
Seats
2
Year built
Not given
Transponder code
A67AB7 (octal 51475267)

Registration

Status
Valid registrationFAA registration status code V (whether the registration certificate is in force). Every aircraft with this code · All codes
Certificate issued
May 31, 2007
Expires
July 31, 2027
Last FAA action
March 4, 2023
Airworthiness
ExperimentalFAA airworthiness class code 4 (the kind of airworthiness certificate it flies under and what it is approved for). Every aircraft with this code · All codes · Registered before Jan 31, 2008FAA certificate purpose code 8A (the kind of airworthiness certificate it flies under and what it is approved for). All codes · November 13, 2007
FAA region
Great LakesFAA region code C (the FAA regional office that handles the record). All codes
FAA record id
00360439

Owner as the FAA publishes it

Name
Maas Harvey L
Type
IndividualFAA type of owner code 1 (who holds the registration: a person, a company, a trust or a government body). Every aircraft with this code · All codes
Address
10661 e Sarri Rd
Poplar, WI 54864-9243

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

2004-12-15Cessna T206H · exported to Korea Rep of (S) · Sale reported

Connections how N51641 links to the rest of the register

Design
Engine
Place
  • Poplar, WI 3 aircraft registered in this town
  • Wisconsin 6,164 aircraft registered

The whole map of how records connect · these connections as data: /graph/aircraft/N51641.json.

Records check free · 2 to understand · 2 clear

The public federal record on N51641, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.

CLEARRegistration and identity

Valid registration to Maas Harvey L, an individual, certificate issued May 31, 2007, expires July 31, 2027. No fractional interest recorded. [1]

NOTEAirworthiness certificate

Experimental certificate for registered before jan 31, 2008; the FAA file gives no certificate date and no manufacture year. [1]

CLEARPrior registrations of this airframe

No earlier tail number is recorded against serial 306 for this model in the deregistered file. [2]

ATTENTIONTail number reuse

N51641 was previously assigned to 1 other aircraft: Cessna T206H (serial T20608368, cancelled December 15, 2004). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]

NOTERecent registry documents

No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]

ATTENTIONAccident and incident record

1 NTSB record under N51641: Accident on May 22, 1999 at Santa Ana, CA: no injuries, substantial damage. Details below. [4]

PENDINGTitle chain, liens and 337 forms

These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.

PENDINGAirworthiness directives and utilization

AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.

NTSB records 1

LAX99LA196Accident on May 22, 1999 at Santa Ana, CA: no injuries, substantial damage.serial on NTSB record: 6047L

Aircraft on the NTSB record: Maule M-5-210C · operated under 091

The pilot's failure to maintain directional control and his excessive use of the rudder to regain runway alignment.

Full record in plain English · Docket and reports at the NTSB

CLEAR the source was checked and shows no adverse findingATTENTION a fact a buyer or lender should understand, often routineNOTE context onlyPENDING covered by the full report
  1. FAA Releasable Aircraft Database, master file, file of October 29, 2026. registry.faa.gov/
  2. FAA deregistered aircraft file (part of the same download), file of October 29, 2026. registry.faa.gov/
  3. FAA document index: registry documents received in recent weeks, file of October 29, 2026. registry.faa.gov/
  4. NTSB aviation accident database (CAROL), records through September 30, 2026. data.ntsb.gov/carol-main-public/basic-search

This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.

Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 29, 2026. See this record on the FAA site · This record as data