# N4002Q: 1978 Ayres S-2R

- Status: Valid registration
- Airframe: [Ayres S-2R](https://openairdocs.org/model/ayres-s-2r) (registry code 0970101, 1 seats)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 2477R
- Year built: 1978
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Certificate issued: August 9, 2016
- Expires: August 31, 2029
- Mode S code: A4AF4E
- Registered owner: [Pietron Spraying Inc](https://openairdocs.org/faa-owner/PIETRON%20SPRAYING%20INC)
- Location: [Larimore, ND](https://openairdocs.org/faa-place/ND/Larimore)
- Owner type: Corporation
- Owner's area on the map: 47.9544° N, 97.6999° W: Placed by OpenAirDocs at the center of ZIP code 58251, 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=4002Q
- Page: https://openairdocs.org/aircraft/N4002Q

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. The registry lists only the engine series, so ADs for every Pratt & Whitney R1340 model are included.

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

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

None in force.

### Matched by engine (Pratt & Whitney R1340 series)

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### Historical (superseded or no longer in force)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 (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB OAK79DVA04](https://openairdocs.org/ntsb/OAK79DVA04), Oct 9, 1978: Thrush Cmdr S2R (N4002Q), Corcoran, CA, substantial damage

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19781009031799A](https://openairdocs.org/incident/19781009031799A), Oct 9, 1978: Ayres S2B (N4002Q), Corcoran, CA, Substantial damage. Eng,s/n 87797,crankshaft sheared.

## 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 Pratt & Whitney R1340 series engine: https://openairdocs.org/engine/pratt-whitney-r1340-series.md

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