# N4999X: 1975 Rockwell International S-2R

- Status: Valid registration
- Airframe: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202, 1 seats)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 2136R
- Year built: 1975
- Type: Fixed wing single engine
- Engine type: Turbo-prop
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: April 16, 1975
- Certificate issued: June 5, 1995
- Expires: July 31, 2027
- Mode S code: A63530
- Registered owner: [Fountain Inc](https://openairdocs.org/faa-owner/FOUNTAIN%20INC)
- Location: [Moscow, ID](https://openairdocs.org/faa-place/ID/Moscow)
- Owner type: Corporation
- Owner's area on the map: 46.7222° N, 116.9402° W: Placed by OpenAirDocs at the center of ZIP code 83843, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4999X
- Page: https://openairdocs.org/aircraft/N4999X

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 (Rockwell International S-2R)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## 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 SEA79DYM37](https://openairdocs.org/ntsb/SEA79DYM37), May 25, 1979: Aero Comdr S2R (N4999X), Helix, OR, 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 19790525014069A](https://openairdocs.org/incident/19790525014069A), May 25, 1979: Ayres S2R (N4999X), Helix, OR, Substantial damage. Engine lost power during spray run. Sprayed oil on windscreen. Found cracked rocker box. Crashed in farm field. .

## Service difficulty reports (1)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 2010FA0000022](https://openairdocs.org/sdr/2010FA0000022), Jan 4, 2010: SPAR. CRACKED. TOP RUDDER ATTACH BRACKET CRACKED OUT OF REAR SPAR ON THE VERTICAL FIN. NOTICED CRACK AT ANNUAL INSPECTION. POSSIBLY INSTALL A HEAVIER REAR SPAR OR BEEF UPS IN 

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Rockwell International S-2R aircraft: https://openairdocs.org/model/rockwell-international-s-2r/aircraft.md
- The Pratt & Whitney R1340 series engine: https://openairdocs.org/engine/pratt-whitney-r1340-series.md

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