# N20AF: 1981 Ayres S-2R

- Status: Valid registration
- Airframe: [Ayres S-2R](https://openairdocs.org/model/ayres-s-2r) (registry code 0970101, 1 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: R1820-021DC
- Year built: 1981
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: July 21, 2000
- Certificate issued: July 27, 2009
- Expires: November 30, 2027
- Mode S code: A18FB0
- Registered owner: [Hawke Ag Aviation](https://openairdocs.org/faa-owner/HAWKE%20AG%20AVIATION)
- Location: [Oakdale, CA](https://openairdocs.org/faa-place/CA/Oakdale)
- Owner type: Corporation
- Owner's area on the map: 37.7915° N, 120.7861° W: Placed by OpenAirDocs at the center of ZIP code 95361, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=20AF
- Page: https://openairdocs.org/aircraft/N20AF

From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Ayres S-2R)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

### Historical (superseded or no longer in force)

- [AD 97-17-03](https://openairdocs.org/ad/97-17-03) (historical): Lower Spar Cap Bolt Hole Areas · Ayres 600 S-2D, S-2R, S2R-G1 and 12 more. Effective Sep 5, 1997
- [AD 97-13-11](https://openairdocs.org/ad/97-13-11) (historical): Lower Spar Cap Bolt Hole Areas · Ayres 600-S-2C, S-2R, S2R-G1 and 12 more. Effective Jul 23, 1997

## Information bulletins (advisory) (1 in force)

- [SAIB ACE-98-42](https://openairdocs.org/saib/ACE-98-42): . Issued Jul 24, 1998

## NTSB investigations

None matched to N20AF.

## FAA accident and incident reports

None matched to N20AF.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Ayres S-2R aircraft: https://openairdocs.org/model/ayres-s-2r/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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