# N2503B: 2000 Blankenship Douglas M CHALLENGER II SPEC

- Status: Valid registration
- Airframe: [Blankenship Douglas M CHALLENGER II SPEC](https://openairdocs.org/model/blankenship-douglas-m-challenger-ii-spec) (registry code 056075L, 2 seats)
- Engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050)
- Serial number: CH20697CW1621
- Year built: 2000
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Quad City Ultralight Acft Corp CHALLENGER II
- Airworthiness: Experimental, amateur built
- Airworthiness date: March 23, 2000
- Certificate issued: February 22, 2005
- Expires: September 30, 2029
- Mode S code: A25A41
- Registered owner: [Maldonado Robert R](https://openairdocs.org/faa-owner/MALDONADO%20ROBERT%20R)
- Location: [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield)
- Owner type: Individual
- Owner's area on the map: 35.3394° N, 119.0237° W: Placed by OpenAirDocs at the center of ZIP code 93304, 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=2503B
- Page: https://openairdocs.org/aircraft/N2503B

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 (Blankenship Douglas M CHALLENGER II SPEC)

None in force.

### Matched by engine (Bombardier ROTAX (ALL))

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N2503B.

## FAA accident and incident reports

None matched to N2503B.

## 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 N2503B

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2503B before.

- [Cancelled 1996-07-18](https://openairdocs.org/deregistered/N2503B-1996-07-18): Piper PA-38-112, S/N 3879A0095. Owner: [Swan Michael D](https://openairdocs.org/faa-owner/SWAN%20MICHAEL%20D), [Woodbury, MN](https://openairdocs.org/faa-place/MN/Woodbury)
- [Cancelled 1971-01-07](https://openairdocs.org/deregistered/N2503B-1971-01-07): Aeronca L-16A, S/N 47-1114. Owner: [Texas Wing Civil Air Patrol](https://openairdocs.org/faa-owner/TEXAS%20WING%20CIVIL%20AIR%20PATROL), [Breckenridge, TX](https://openairdocs.org/faa-place/TX/Breckenridge)

## Related

- Other Blankenship Douglas M CHALLENGER II SPEC aircraft: https://openairdocs.org/model/blankenship-douglas-m-challenger-ii-spec/aircraft.md
- The Bombardier ROTAX (ALL) engine: https://openairdocs.org/engine/bombardier-rotax-all.md

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