# N504WS: 2025 Diamond Aircraft Ind DA20-C1

- Status: Valid registration
- Airframe: [Diamond Aircraft Ind DA20-C1](https://openairdocs.org/model/diamond-aircraft-ind-da20-c1) (registry code 2990001, 2 seats)
- Engine: [Continental IO-240-B](https://openairdocs.org/engine/continental-io-240-b) (registry code 17177)
- Data sheets: [TCDS TA4CH](https://openairdocs.org/tcds/TA4CH) (Diamond Aircraft Industries Inc.), [TCDS E7SO](https://openairdocs.org/tcds/E7SO) (Continental Aerospace Technologies, Inc.) (OpenAirDocs)
- Serial number: C0784
- Year built: 2025
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, utility
- Airworthiness date: June 10, 2025
- Certificate issued: July 6, 2025
- Expires: July 31, 2032
- Mode S code: A64AD1
- Registered owner: [Gc Aviation Services 1 LLC](https://openairdocs.org/faa-owner/GC%20AVIATION%20SERVICES%201%20LLC)
- Location: [Miamisburg, OH](https://openairdocs.org/faa-place/OH/Miamisburg)
- Owner type: LLC
- Owner's area on the map: 39.6293° N, 84.2760° W: Placed by OpenAirDocs at the center of ZIP code 45342, 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=504WS
- Page: https://openairdocs.org/aircraft/N504WS

From the FAA registry file of October 20, 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): 5 in force

### Matched by airframe (Diamond Aircraft Ind DA20-C1)

- [AD 2026-15-18](https://openairdocs.org/ad/2026-15-18): Emergency Locator Beacon · Diamond Aircraft Industries DA20-C1. Effective Sep 8, 2026
- [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI). Effective Mar 21, 2022
- [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005

### Matched by engine (Continental IO-240-B)

- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2010-11-04](https://openairdocs.org/ad/2010-11-04): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 190 more. Effective Jun 16, 2010

### Historical (superseded or no longer in force)

- [AD 2009-24-51](https://openairdocs.org/ad/2009-24-51) (historical): Hydraulic lifters · Teledyne Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 156 more

## Information bulletins (advisory) (8 in force)

- [SAIB SW-18-31](https://openairdocs.org/saib/SW-18-31): NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM. Issued Nov 21, 2018
- [SAIB CE-12-09](https://openairdocs.org/saib/CE-12-09): Landing Gear, Nose: Diamond DA20 Nose Landing Fork Assembly. Issued Dec 22, 2011
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013
- [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012
- [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009
- [SAIB NE-05-38](https://openairdocs.org/saib/NE-05-38): . Issued Mar 18, 2005
- [SAIB CE-98-21R1](https://openairdocs.org/saib/CE-98-21R1): . Issued Jun 10, 1998

## NTSB investigations

None matched to N504WS.

## FAA accident and incident reports

None matched to N504WS.

## Service difficulty reports

None filed for this aircraft.

## Related

- Other Diamond Aircraft Ind DA20-C1 aircraft: https://openairdocs.org/model/diamond-aircraft-ind-da20-c1/aircraft.md
- STCs for the Diamond Aircraft Ind DA20-C1: https://openairdocs.org/model/diamond-aircraft-ind-da20-c1/stcs.md
- The Continental IO-240-B engine: https://openairdocs.org/engine/continental-io-240-b.md

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