# N8991Q: 1972 Aero Commander S2R

- Status: Valid registration
- Airframe: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022, 1 seats)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 1661R
- Year built: 1972
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: August 4, 1972
- Certificate issued: August 10, 2026
- Expires: August 31, 2033
- Mode S code: AC694D
- Registered owner: [Thrush Heavy LLC](https://openairdocs.org/faa-owner/THRUSH%20HEAVY%20LLC)
- Location: [Billings, MT](https://openairdocs.org/faa-place/MT/Billings)
- Owner type: LLC
- Owner's area on the map: 45.8137° N, 108.7098° W: Placed by OpenAirDocs at the center of ZIP code 59106, 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=8991Q
- Page: https://openairdocs.org/aircraft/N8991Q

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 (Aero Commander S2R)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N8991Q.

## 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.

- [Incident 19900801059979I](https://openairdocs.org/incident/19900801059979I), Aug 1, 1990: Ayres S2RRESTD (N8991Q), Sunray, TX, Minor damage. Engine lost power on climb. Forced landing on dirt road. Particular mechanical problem could not be isolated.

## 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 Aero Commander S2R aircraft: https://openairdocs.org/model/aero-commander-s2r/aircraft.md
- The Pratt & Whitney R1340 series engine: https://openairdocs.org/engine/pratt-whitney-r1340-series.md

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