# Michael W Stewart PITTS S1

- Type: Aircraft model (FAA registry)
- Registry code: 05634AL
- Manufacturer (registry): MICHAEL W STEWART
- Model: PITTS S1
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 1
- Weight class: Up to 12,499 lb
- Certification: Not type certificated
- Registered aircraft: 1
- Page: https://openairdocs.org/model/michael-w-stewart-pitts-s1

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (1)

- [N401MS](https://openairdocs.org/aircraft/N401MS): [Martine Zachary](https://openairdocs.org/faa-owner/MARTINE%20ZACHARY), [Carterville, IL](https://openairdocs.org/faa-place/IL/Carterville), built 2015, S/N 085

## 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…

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Aerotek PITTS S-1](https://openairdocs.org/model/aerotek-pitts-s-1): 1 registered aircraft, registry code 0110100
- [Hildebrant Earl L PITTS S-1](https://openairdocs.org/model/hildebrant-earl-l-pitts-s-1): 1 registered aircraft, registry code 0560509
- [Young David E PITTS S-1](https://openairdocs.org/model/young-david-e-pitts-s-1): 1 registered aircraft, registry code 05607JU
- [Henderson Lance L PITTS S1](https://openairdocs.org/model/henderson-lance-l-pitts-s1): 1 registered aircraft, registry code 05617K1
- [Clute William A PITTS S-1](https://openairdocs.org/model/clute-william-a-pitts-s-1): 1 registered aircraft, registry code 05628KF
- [Sutton Todd K PITTS S-1](https://openairdocs.org/model/sutton-todd-k-pitts-s-1): 1 registered aircraft, registry code 05628Q8
- [Farion Donald PITTS S1](https://openairdocs.org/model/farion-donald-pitts-s1): 1 registered aircraft, registry code 056292K
- [Germann David E PITTS S1](https://openairdocs.org/model/germann-david-e-pitts-s1): 1 registered aircraft, registry code 05629VY
- [Edward Malley III PITTS S-1](https://openairdocs.org/model/edward-malley-iii-pitts-s-1): 1 registered aircraft, registry code 05634VW
- [Frank Jerry W PITTS S-1](https://openairdocs.org/model/frank-jerry-w-pitts-s-1): 1 registered aircraft, registry code 056415O
- [Jimmie Kevin Alderman PITTS S1](https://openairdocs.org/model/jimmie-kevin-alderman-pitts-s1): 1 registered aircraft, registry code 05642SZ
- [Baumgartner PITTS S-1](https://openairdocs.org/model/baumgartner-pitts-s-1): 1 registered aircraft, registry code 72201A4

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