# N4SX: 1999 Scherr Allan L LANCAIR IV

- Status: Valid registration
- Airframe: [Scherr Allan L LANCAIR IV](https://openairdocs.org/model/scherr-allan-l-lancair-iv) (registry code 05607OS, 4 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: LIV-116
- Year built: 1999
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Lancair Intl Inc LANCAIR IV P
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 20, 1999
- Certificate issued: March 9, 2023
- Expires: March 31, 2030
- Mode S code: A4A995
- Registered owner: [Gallant Arthur](https://openairdocs.org/faa-owner/GALLANT%20ARTHUR)
- Location: [Boxboro, MA](https://openairdocs.org/faa-place/MA/Boxboro)
- Owner type: Individual
- Owner's area on the map: 42.4860° N, 71.5210° W: Placed by OpenAirDocs at the center of ZIP code 01719, 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=4SX
- Page: https://openairdocs.org/aircraft/N4SX

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 (Scherr Allan L LANCAIR IV)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4SX.

## FAA accident and incident reports (3)

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.

- [Incident 20100106025739I](https://openairdocs.org/incident/20100106025739I), Jan 6, 2010: Scherr Alla LANCAIR IV (N4SX), Poughkeepsie, NY, Minor damage. Subject airman stated that he and two passengers departed kpou at approximately 1550 EST for a local sightseeing flight. He stated that there were no…
- [Incident 20071113830279I](https://openairdocs.org/incident/20071113830279I), Nov 13, 2007: Amtr LANCAIRIV (N4SX), Rochester, NY, Minor damage. (-23) At approximately 1730 hours on 11-13-07, a Lancair iv, bearing registration N4SX, piloted by the pilot [privacy data omitted], landed with the gear…
- [Incident 20000625032349I](https://openairdocs.org/incident/20000625032349I), Jun 25, 2000: Amtr LANCAIRIV (N4SX), Mansfield, MA, Minor damage. (-23)A/c landed runway 14, winds were at 17015 KTS. Per (PIC) it was a hard landing nose gear first. A/c bounced up & came down on the nose gear and sheared…

## 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 N4SX

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4SX before.

- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N4SX-undated): Lockheed 1329, S/N 5081. N-number assigned, not yet registered

## Related

- Other Scherr Allan L LANCAIR IV aircraft: https://openairdocs.org/model/scherr-allan-l-lancair-iv/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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