# N4425S: 1997 Yakovlev YAK-9U-M

- Status: Valid registration
- Airframe: [Yakovlev YAK-9U-M](https://openairdocs.org/model/yakovlev-yak-9u-m) (registry code 05603QW, 1 seats)
- Engine: [Allison V1710 series](https://openairdocs.org/engine/allison-v1710-series) (registry code 03001)
- Serial number: 0470405
- Year built: 1997
- Type: Fixed wing single engine
- Engine type: Turbo-shaft
- Airworthiness: Experimental, exhibition
- Airworthiness date: December 1, 1998
- Certificate issued: July 31, 2015
- Expires: July 31, 2028
- Mode S code: A55523
- Registered owners: [Andreini Linda J](https://openairdocs.org/faa-owner/ANDREINI%20LINDA%20J), [Andreini Edward J](https://openairdocs.org/faa-owner/ANDREINI%20EDWARD%20J), [Andreini Sandra L](https://openairdocs.org/faa-owner/ANDREINI%20SANDRA%20L)
- Location: [Half Moon Bay, CA](https://openairdocs.org/faa-place/CA/Half%20Moon%20Bay)
- Owner type: Co-owned
- Owner's area on the map: 37.4557° N, 122.4081° W: Placed by OpenAirDocs at the center of ZIP code 94019, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4425S
- Page: https://openairdocs.org/aircraft/N4425S

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 Allison V1710 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Yakovlev YAK-9U-M)

None in force.

### Matched by engine (Allison V1710 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4425S.

## FAA accident and incident reports

None matched to N4425S.

## 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 N4425S

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4425S before.

- [Cancelled 1989-09-07](https://openairdocs.org/deregistered/N4425S-1989-09-07): Air Tractor AT-301, S/N 3010085. N-number assigned, not yet registered

## Related

- Other Yakovlev YAK-9U-M aircraft: https://openairdocs.org/model/yakovlev-yak-9u-m/aircraft.md
- The Allison V1710 series engine: https://openairdocs.org/engine/allison-v1710-series.md

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