# N4005M: 1978 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: 2493R
- Year built: 1978
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: May 29, 1979
- Certificate issued: January 29, 2019
- Expires: January 31, 2029
- Mode S code: A4AFB4
- Registered owner: [Foster Floyd W](https://openairdocs.org/faa-owner/FOSTER%20FLOYD%20W)
- Location: [Coahoma, MS](https://openairdocs.org/faa-place/MS/Coahoma)
- Owner type: Individual
- Owner's area on the map: 34.3617° N, 90.4906° W: Placed by OpenAirDocs at the center of ZIP code 38617, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4005M
- Page: https://openairdocs.org/aircraft/N4005M

From the FAA registry file of October 24, 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### Historical (superseded or no longer in force)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 N4005M.

## FAA accident and incident reports

None matched to N4005M.

## 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.

## Earlier aircraft with N4005M

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4005M before.

- [Cancelled 1965-07-19](https://openairdocs.org/deregistered/N4005M-1965-07-19): Piper PA-12, S/N 12-2882, built 1947. Owner: [Sac Aero Club](https://openairdocs.org/faa-owner/SAC%20AERO%20CLUB), [Topeka, KS](https://openairdocs.org/faa-place/KS/Topeka)

## 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

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.