# N4378A: 1991 Quad City Ultralight Acft CHALLENGER II

- Status: Valid registration
- Airframe: [Quad City Ultralight Acft CHALLENGER II](https://openairdocs.org/model/quad-city-ultralight-acft-challenger-ii) (registry code 059010Q, 2 seats)
- Engine: [Rotax 503 DCDI](https://openairdocs.org/engine/rotax-503-dcdi) (registry code 55566)
- Serial number: CH21910757
- Year built: 1991
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: June 21, 2007
- Certificate issued: November 10, 2011
- Expires: November 30, 2027
- Mode S code: A54090
- Registered owner: [Larose John E](https://openairdocs.org/faa-owner/LAROSE%20JOHN%20E)
- Location: [West Glover, VT](https://openairdocs.org/faa-place/VT/West%20Glover)
- Owner type: Individual
- Owner's area on the map: 44.7054° N, 72.2709° W: Placed by OpenAirDocs at the center of ZIP code 05875, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4378A
- Page: https://openairdocs.org/aircraft/N4378A

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 (Quad City Ultralight Acft CHALLENGER II)

None in force.

### Matched by engine (Rotax 503 DCDI)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4378A.

## FAA accident and incident reports

None matched to N4378A.

## 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 N4378A

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4378A before.

- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N4378A-undated): Piper PA-18A 150, S/N 184784. Triennial form not returned

## Related

- Other Quad City Ultralight Acft CHALLENGER II aircraft: https://openairdocs.org/model/quad-city-ultralight-acft-challenger-ii/aircraft.md
- The Rotax 503 DCDI engine: https://openairdocs.org/engine/rotax-503-dcdi.md

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