# N401MS: 2015 Michael W Stewart PITTS S1

- Status: Valid registration
- Airframe: [Michael W Stewart PITTS S1](https://openairdocs.org/model/michael-w-stewart-pitts-s1) (registry code 05634AL, 1 seats)
- Engine: [Lycoming O-320-EXP](https://openairdocs.org/engine/lycoming-o-320-exp) (registry code 42406)
- Serial number: 085
- Year built: 2015
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 28, 2015
- Certificate issued: January 30, 2026
- Expires: January 31, 2033
- Mode S code: A4B17C
- Registered owner: [Martine Zachary](https://openairdocs.org/faa-owner/MARTINE%20ZACHARY)
- Location: [Carterville, IL](https://openairdocs.org/faa-place/IL/Carterville)
- Owner type: Individual
- Owner's area on the map: 37.7864° N, 89.0862° W: Placed by OpenAirDocs at the center of ZIP code 62918, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=401MS
- Page: https://openairdocs.org/aircraft/N401MS

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 (Michael W Stewart PITTS S1)

None in force.

### Matched by engine (Lycoming O-320-EXP)

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 CEN26LA074](https://openairdocs.org/ntsb/CEN26LA074), Dec 31, 2025: Pitts S1S (N401MS), Carbondale, IL, substantial damage. Probable cause: A loss of engine power due to fuel starvation resulting from an uncommanded change to the fuel servo mixture position due to the improperly installed mixture cable.

## 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 20251231020229A](https://openairdocs.org/incident/20251231020229A), Dec 31, 2025: Michael W Stewart PITTS S1 (N401MS), Murphysboro, IL, Destroyed. After a low pass on runway 18, the aircraft climbed to traffic pattern altitude and leveled off. Shortly after leveling off, the clamp on the mixture cable…

## 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 N401MS

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N401MS before.

- [Cancelled 2009-09-03](https://openairdocs.org/deregistered/N401MS-2009-09-03): Winward Performance OWL, S/N 001. Triennial form not returned. Owner: [Mississippi State University](https://openairdocs.org/faa-owner/MISSISSIPPI%20STATE%20UNIVERSITY), [Starkville, MS](https://openairdocs.org/faa-place/MS/Starkville)
- [Cancelled 2001-09-27](https://openairdocs.org/deregistered/N401MS-2001-09-27): North American NA-265-60, S/N 306-17. Owner: [Centurion Investments Inc DBA](https://openairdocs.org/faa-owner/CENTURION%20INVESTMENTS%20INC%20DBA), [Saint Louis, MO](https://openairdocs.org/faa-place/MO/Saint%20Louis)

## Related

- Other Michael W Stewart PITTS S1 aircraft: https://openairdocs.org/model/michael-w-stewart-pitts-s1/aircraft.md
- The Lycoming O-320-EXP engine: https://openairdocs.org/engine/lycoming-o-320-exp.md

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