# N21ZA: 2011 Flight Design CTLS

- Status: Valid registration
- Airframe: [Flight Design CTLS](https://openairdocs.org/model/flight-design-ctls) (registry code 060005B, 2 seats)
- Engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572)
- Serial number: F-10-09-04
- Year built: 2011
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Light sport, airplane
- Airworthiness date: August 17, 2011
- Certificate issued: August 17, 2011
- Expires: August 31, 2027
- Mode S code: A1B969
- Registered owner: [Ras Aviation LLC](https://openairdocs.org/faa-owner/RAS%20AVIATION%20LLC)
- Location: [Elyria, OH](https://openairdocs.org/faa-place/OH/Elyria)
- Owner type: LLC
- Owner's area on the map: 41.3700° N, 82.1360° W: Placed by OpenAirDocs at the center of ZIP code 44035, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=21ZA
- Page: https://openairdocs.org/aircraft/N21ZA

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. The registry lists only the engine series, so ADs for every Rotax 912ULS model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Flight Design CTLS)

None in force.

### Matched by engine (Rotax 912ULS series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (3)

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 GAA19CA049](https://openairdocs.org/ntsb/GAA19CA049), Nov 4, 2018: Flight Design Ctls (N21ZA), Elyria, OH, substantial damage. Probable cause: The pilot's failure to maintain adequate airspeed during landing in variable gusting crosswind conditions, which resulted in a hard landing and runway excursion.
- [NTSB CEN13IA024](https://openairdocs.org/ntsb/CEN13IA024), Oct 17, 2012: Flight Design Ctls (N21ZA), Elyria, OH, incident, minor damage. Probable cause: The manufacturing defects in the main landing gear leg, which resulted in its eventual failure.
- [NTSB CEN12LA676](https://openairdocs.org/ntsb/CEN12LA676), Jul 20, 2012: Flight Design Ctls (N21ZA), Elyria, OH, substantial damage. Probable cause: The pilot’s misjudged landing flare, which resulted in a hard landing.

## 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.

- [Accident 20181104021489A](https://openairdocs.org/incident/20181104021489A), Nov 4, 2018: Flight Design Gmbh CTLS (N21ZA), Elyria, OH, Substantial damage. Upon landing on runway 7, the aircraft was at 10 feet going approximately 61 knots. When the aircraft was at approximately 5 feet, going approximately 55…
- [Incident 20121017023889I](https://openairdocs.org/incident/20121017023889I), Oct 17, 2012: Flight Design Gmbh CTLS (N21ZA), Elyria, OH, Minor damage. The right main landing gear strut failed shortly after touchdown. This is a fixed gear aircraft. The aircraft, including the landing gear strut is made of…
- [Accident 20120719025239A](https://openairdocs.org/incident/20120719025239A), Jul 19, 2012: Flight Design Gmbh CTLS (N21ZA), Elyria, OH, Substantial damage. On 7/19/2012, landed hard on the nose landing gear. This damaged the nose landing gear, engine mount, firewall, and the right main landing gear. The damage to…

## 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 Flight Design CTLS aircraft: https://openairdocs.org/model/flight-design-ctls/aircraft.md
- The Rotax 912ULS series engine: https://openairdocs.org/engine/rotax-912uls-series.md

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