# N398WH: 2025 Hammond Alan WHISPER X 350

- Status: Valid registration
- Airframe: [Hammond Alan WHISPER X 350](https://openairdocs.org/model/hammond-alan-whisper-x-350) (registry code 056420Q, 2 seats)
- Engine: [Ulpower 520IS](https://openairdocs.org/engine/ulpower-520is) (registry code 63045)
- Serial number: 001
- Year built: 2025
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Whisper Aircraft WHISPER X 350
- Airworthiness: Experimental, amateur built
- Airworthiness date: August 10, 2026
- Certificate issued: April 26, 2025
- Expires: April 30, 2032
- Mode S code: A4A27D
- Registered owner: [Hammond Alan](https://openairdocs.org/faa-owner/HAMMOND%20ALAN)
- Location: [Taylorsville, UT](https://openairdocs.org/faa-place/UT/Taylorsville)
- Owner type: Individual
- Owner's area on the map: 40.6584° N, 111.9217° W: Placed by OpenAirDocs at the center of ZIP code 84123, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=398WH
- Page: https://openairdocs.org/aircraft/N398WH

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 (Hammond Alan WHISPER X 350)

None in force.

### Matched by engine (Ulpower 520IS)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N398WH.

## FAA accident and incident reports

None matched to N398WH.

## 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 Hammond Alan WHISPER X 350 aircraft: https://openairdocs.org/model/hammond-alan-whisper-x-350/aircraft.md
- The Ulpower 520IS engine: https://openairdocs.org/engine/ulpower-520is.md

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