# N21QQ: 1983 Shilling E E Q-2

- Status: Valid registration
- Airframe: [Shilling E E Q-2](https://openairdocs.org/model/shilling-e-e-q-2) (registry code 05645MA, 1 seats)
- Engine: [Revmaster 2100](https://openairdocs.org/engine/revmaster-2100) (registry code 52550)
- Serial number: 2005
- Year built: 1983
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 20, 1983
- Certificate issued: September 19, 1986
- Expires: April 30, 2028
- Mode S code: A1B896
- Registered owner: [Moore Michael R](https://openairdocs.org/faa-owner/MOORE%20MICHAEL%20R)
- Location: [Spokane, WA](https://openairdocs.org/faa-place/WA/Spokane)
- Owner type: Individual
- Owner's area on the map: 47.7407° N, 117.2614° W: Placed by OpenAirDocs at the center of ZIP code 99217, 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=21QQ
- Page: https://openairdocs.org/aircraft/N21QQ

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 (Shilling E E Q-2)

None in force.

### Matched by engine (Revmaster 2100)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (2)

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 SEA92LA103](https://openairdocs.org/ntsb/SEA92LA103), May 16, 1992: E.E. Shilling Q-2 (N21QQ), Billings, MT, substantial damage. Probable cause: AN UNDETERMINED LOSS OF ENGINE POWER.
- [NTSB DEN86LA228](https://openairdocs.org/ntsb/DEN86LA228), Aug 8, 1986: E. E. Schilling Q-2 (N21QQ), Billings, MT, substantial damage

## FAA accident and incident reports

None matched to N21QQ.

## Reports on N21QQ not matched to an aircraft (2)

They name N21QQ, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Accident 19920516015099A](https://openairdocs.org/incident/19920516015099A), May 16, 1992: Amtrqk QUICKIE2 (N21QQ), Billings, MT, Substantial damage. Engine quit on test flight after engine overhaul. Damaged landing in rough field.
- [Accident 19860808038559A](https://openairdocs.org/incident/19860808038559A), Aug 8, 1986: Amtrqk QUICKIE2 (N21QQ), Billings, MT, Substantial damage. Engine lost power on final. Aircraft made it to the runway but bounced damaging aircraft. Density altitude a factor.

## 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 Shilling E E Q-2 aircraft: https://openairdocs.org/model/shilling-e-e-q-2/aircraft.md
- The Revmaster 2100 engine: https://openairdocs.org/engine/revmaster-2100.md

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