# N211SD: 1985 Siai-Marchetti S 211

- Status: Valid registration
- Airframe: [Siai-Marchetti S 211](https://openairdocs.org/model/siai-marchetti-s-211) (registry code 8120419, 2 seats)
- Engine: [Pratt & Whitney Canada JT15D 5 series](https://openairdocs.org/engine/pratt-whitney-canada-jt15d-5-series) (registry code 52113)
- Serial number: 013/02-010
- Year built: 1985
- Type: Fixed wing single engine
- Engine type: Turbo-fan
- Airworthiness: Experimental, exhibition
- Airworthiness date: September 29, 2017
- Certificate issued: March 26, 2022
- Expires: March 31, 2029
- Mode S code: A1BECD
- Registered owner: [S211 LLC](https://openairdocs.org/faa-owner/S211%20LLC)
- Location: [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell)
- Owner type: LLC
- Owner's area on the map: 48.2306° N, 114.4033° W: Placed by OpenAirDocs at the center of ZIP code 59901, within about 12 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=211SD
- Page: https://openairdocs.org/aircraft/N211SD

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 Canada JT15D 5 model are included.

## ADs that may apply (OpenAirDocs): 3 in force

### Matched by airframe (Siai-Marchetti S 211)

None in force.

### Matched by engine (Pratt & Whitney Canada JT15D 5 series)

- [AD 2008-24-10](https://openairdocs.org/ad/2008-24-10): Fuel Control Hydro Mechanical Unit (HMU) P3 servo · Pratt & Whitney Canada JT15D-5, JT15D-5B, JT15D-5F and 1 more. Effective Jan 2, 2009
- [AD 93-19-03](https://openairdocs.org/ad/93-19-03): Flow Divider Start Salve Diaphragm · Pratt & Whitney Canada JT15D-5A. Effective Oct 12, 1993
- [AD 91-01-03](https://openairdocs.org/ad/91-01-03): Hydromechanical Fuel Control Units · Pratt & Whitney Canada JT15D-5, PW118, PW118A and 3 more. Effective Jan 7, 1991

### Historical (superseded or no longer in force)

- [AD 92-22-15](https://openairdocs.org/ad/92-22-15) (historical): Pratt & Whitney Canada JT15D-5A. Effective Oct 21, 1992

## Information bulletins (advisory) (1 in force)

- [SAIB NE-07-03](https://openairdocs.org/saib/NE-07-03): Dual-engine flameouts. Issued Oct 12, 2006

## NTSB investigations

None matched to N211SD.

## FAA accident and incident reports

None matched to N211SD.

## 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) (1)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (Pratt & Whitney Canada JT15D 5 series)

- [STC SE01232AT](https://openairdocs.org/stc/SE01232AT): Installation of Unison Ignition Lead, P/N 10-395428-3, 38.5-inch Type 3 Ignition Lead. Unison Industries

## Earlier aircraft with N211SD

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N211SD before.

- [Cancelled 2014-09-16](https://openairdocs.org/deregistered/N211SD-2014-09-16): San Diego Aero-Space Museum RYAN NYP-3, S/N AM-1, built 1979. Registration expired, pending cancellation. Owner: [San Diego Aero Space Museum Inc](https://openairdocs.org/faa-owner/SAN%20DIEGO%20AERO%20SPACE%20MUSEUM%20INC), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego)

## Related

- Other Siai-Marchetti S 211 aircraft: https://openairdocs.org/model/siai-marchetti-s-211/aircraft.md
- The Pratt & Whitney Canada JT15D 5 series engine: https://openairdocs.org/engine/pratt-whitney-canada-jt15d-5-series.md

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