# N521CF: 1990 Callahan Clarence F CHALLENGER II

- Status: Valid registration
- Airframe: [Callahan Clarence F CHALLENGER II](https://openairdocs.org/model/callahan-clarence-f-challenger-ii) (registry code 05676TJ, 2 seats)
- Engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050)
- Serial number: CH2-0490-0521
- Year built: 1990
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 15, 1997
- Certificate issued: April 19, 2023
- Expires: April 30, 2030
- Mode S code: A68CDD
- Registered owners: [Roggatz Alvin R](https://openairdocs.org/faa-owner/ROGGATZ%20ALVIN%20R), [Roggatz Sandra L](https://openairdocs.org/faa-owner/ROGGATZ%20SANDRA%20L)
- Location: [Correctionville, IA](https://openairdocs.org/faa-place/IA/Correctionville)
- Owner type: Co-owned
- Owner's area on the map: 42.4718° N, 95.8053° W: Placed by OpenAirDocs at the center of ZIP code 51016, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521CF
- Page: https://openairdocs.org/aircraft/N521CF

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 (Callahan Clarence F CHALLENGER II)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB MIA02LA164](https://openairdocs.org/ntsb/MIA02LA164), Sep 1, 2002: Clarence F. Callahan Challenger II (N521CF), Plymouth, FL, substantial damage. Probable cause: The pilot's failure to maintain the proper alignment which resulted in the airplane impacting trees on the south side of the approach end of the landing runway.

## FAA accident and incident reports (1)

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.

- [Accident 20020901026509A](https://openairdocs.org/incident/20020901026509A), Sep 1, 2002: Amtr CHALLENGER2 (N521CF), Plymouth, FL, Substantial damage. (-23) The pilot stated that his final approach to runway 33 was low. The pilot applied power and the aircraft rolled to the right then nosed downward and…

## 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 Callahan Clarence F CHALLENGER II aircraft: https://openairdocs.org/model/callahan-clarence-f-challenger-ii/aircraft.md
- The Bombardier ROTAX (ALL) engine: https://openairdocs.org/engine/bombardier-rotax-all.md

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