Cessna 172S
N21591 is a Cessna 172S, a fixed-wing airplane with one motor with a piston engine, built in 2004. It has 4 seats. It is registered to Kohn Aviation LLC, an LLC in San Carlos, California. The registration is valid: it was issued on August 24, 2018 and expires on August 31, 2028. It holds a standard airworthiness certificate for normal; utility, dated June 29, 2004.
Aircraft
- Maker
- Cessna
- Model
- 172S · all 172Ss and related versions
- Serial number
- 172S9658
- Type
- Fixed-wing, single engine
- Power
- Piston (reciprocating), 1 motor · Lycoming IO-360-L2A · 180 hp
- Seats
- 4
- Year built
- 2004
- Transponder code
- A1CFC2 (octal 50347702)
Registration
- Status
- Valid registration
- Certificate issued
- August 24, 2018
- Expires
- August 31, 2028
- Last FAA action
- June 3, 2023
- Airworthiness
- Standard · Normal; Utility · June 29, 2004
- FAA region
- Western-Pacific
- FAA record id
- 00117099
Owner as the FAA publishes it
- Name
- Kohn Aviation LLC
- Type
- LLC
- Address
- 108 Wildwood Ave
San Carlos, CA 94070-4517
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
Records check free · 2 to understand · 3 clear
The public federal record on N21591, 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.
Valid registration to Kohn Aviation LLC, an LLC, certificate issued August 24, 2018, expires August 31, 2028. No fractional interest recorded. [1]
Standard certificate for normal; utility, dated June 29, 2004, consistent with the 2004 manufacture year. [1]
No earlier tail number is recorded against serial 172S9658 for this model in the deregistered file. [2]
N21591 was previously assigned to 1 other aircraft: Cessna 172M (serial 17263980, cancelled September 11, 1980). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]
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]
1 NTSB record under N21591: Accident on September 21, 2009 at San Carlos, CA: no injuries, substantial damage. Details below. [4]
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.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
NTSB records 1
Aircraft on the NTSB record: Cessna 172S · operated under 091
The student pilot's failure to maintain clearance with a fence post during taxi.
Search the NTSB's CAROL system for WPR09CA461 for the docket and final report. Open CAROL
- FAA Releasable Aircraft Database, master file, file of October 2, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of October 2, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of October 2, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through August 27, 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 2, 2026. See this record on the FAA site · This record as data