N21591 is a 2004 Cessna 172S (fixed wing single engine) with serial number 172S9658, registered in San Carlos, CA. Its FAA registration is valid and runs until Aug 31, 2028; the renewal window opens on Feb 29, 2028. It is powered by a Lycoming IO-360-L2A rated at 180 hp. Its airworthiness certificate is in the standard class (normal, utility), issued Jun 29, 2004. It is one of 1,914 172S aircraft in the FAA registry, 213 of them registered in California. About 49% of them were built after it. The NTSB accident database lists one record for this airframe since 2008, the latest on Sep 21, 2009.
Registration
- FAA status
- Valid registration
- Expires
- Aug 31, 2028
- Registrant type
- LLC
- Registered owner
- KOHN AVIATION LLC
- Location
- San Carlos, CA
- Local FAA office (FSDO)
- San Jose FSDO (SJC FSDO) · (408) 795-4000
- Certificate issued
- Aug 24, 2018
- Last FAA action
- Jun 3, 2023
- Mode S code (hex)
- A1CFC2
- Mode S code (octal)
- 50347702
- Official record
- registry.faa.gov
Aircraft
- Manufacturer
- CESSNA
- Model
- 172S
- Type certificate (TCDS)
- 3A12 (Textron Aviation Inc.)
- Year manufactured
- 2004
- Serial number
- 172S9658
- Aircraft type
- Fixed wing single engine
- Engine type
- Reciprocating
- Engine
- LYCOMING IO-360-L2A (180 hp)
- Engines / seats
- 1 / 4
- Weight class
- Up to 12,499 lb
- Airworthiness
- Standard since Jun 29, 2004
- Approved operations
- Normal, Utility
Public airports near San Carlos
| Airport | ID | Distance | Tower | Fuel |
|---|---|---|---|---|
| San Carlos San Carlos, CA | KSQL | 1 mi | Towered | 100LL, A, A+, UL94 |
| Palo Alto Palo Alto, CA | KPAO | 9 mi | Towered | 100LL, A |
| San Francisco International San Francisco, CA | KSFO | 10 mi | Towered | 100LL, A, A++ |
Straight-line distance from the registration city, from the FAA airport directory (NASR). The registry does not say where an aircraft is based.
Earlier registrations of this number
| Canceled | Aircraft | Serial | Year | Exported to | Same airframe today |
|---|---|---|---|---|---|
| Sep 11, 1980 | CESSNA 172M | 17263980 | 1974 |
NTSB accident and incident records
| Date | Place | Aircraft (as NTSB recorded it) | Damage | Highest injury | NTSB no. |
|---|---|---|---|---|---|
| Sep 21, 2009 | San Carlos, CA | Cessna 172S this airframe | Substantial | None | WPR09CA461 |
From the NTSB aviation accident database (events since 2008, data through Oct 28, 2026), matched by N-number. An N-number can move between aircraft, so each row is checked against the serial number on the current registration.