N525DK — 1990 Ayres Corporation S2R-R1340, Elsie, MI

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This aircraft — FAA registration facts

N525DK is a 1990 Ayres Corporation S2R-R1340 (serial R1340-026), registered to Slf Air LLC (LLC) in Elsie, MI. Its FAA registration is recorded as v and expires May 2032; the airworthiness certificate dates from September 1990 (36 years ago). It carries a P&W R1340 SERIES engine rated at 600 hp, the engine on 83% of registered Ayres Corporation S2R-R1340s. Its Mode-S transponder broadcasts the ICAO 24-bit address A69BD6. It is one of 12 Ayres Corporation S2R-R1340 aircraft on the FAA registry. Slf Air LLC holds 2 aircraft on the registry.

Registered owner: Slf Air LLC
Owner type: LLC
Based in: Elsie, MI
Serial number: R1340-026
Year built: 1990 · 36 yrs old
Airworthiness class: 31
FAA status: V
Mode-S / ICAO24: A69BD6 · 51515726 octal
Certificate issued: May 21, 2025
Airworthiness date: Sep 7, 1990
Last FAA activity: May 21, 2025
Registration expires: May 31, 2032
FAA region: Central

Source: FAA aircraft registry (public record). Community reviews and photos below.

Engine on this aircraft

Engine: P&W R1340 SERIES
Engine type: Reciprocating (Piston)
Rated power: 600 hp
Power per seat: 600 hp
FAA engine code: 52016

10 of the 12 registered Ayres Corporation S2R-R1340 carry this engine (83%), across 3 engine variants on the type.

Source: FAA engine reference (ENGINE.txt), matched on this registration's engine code.

Community facts about N525DK

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Flight history & live tracking

ICAO24: a69bd6

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Aircraft Type — ACFTREF 0970210

Ayres Corporation S2R-R1340

Engines: 1

Type: piston

Seats: 1

Category: Standard

Engine — CODE 52016

Manufacturer: P&W

Model: R1340 SERIES

Type: Reciprocating (Piston)

Horsepower: 600 HP

FAA Registration Record

N-Number: N525DK

Serial Number: R1340-026

Year Manufactured: 1990

ACFTREF Code: 0970210

Engine Code: 52016

Status: V (V)

Certification: 31

Type Aircraft: Fixed Wing Single Engine (4)

Type Engine: Reciprocating (Piston) (1)

Source: master

Transponder / ADS-B

Mode S (octal): 51515726

ICAO 24-bit (hex): A69BD6

ADS-B Exchange ↗ | FlightAware ↗

Registrant

Slf Air LLC

LLC

View all 2 aircraft registered to this owner →

11495 E S Gratiot Co Line Rd
Elsie, MI, 488319100

FAA Region: Central

Key Dates

Certificate Issued May 21, 2025

Airworthiness Sep 7, 1990

Expiration May 31, 2032

Last Activity May 21, 2025

Data as of Oct 5, 2026

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N525DK V

This aircraft — FAA registration facts

Engine on this aircraft

Community facts about N525DK

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Flight history & live tracking

Aircraft Type — ACFTREF 0970210

Engine — CODE 52016

FAA Registration Record

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