# N18922: 1939 Ryan Aeronautical ST-A

- Status: Valid registration
- Airframe: [Ryan Aeronautical ST-A](https://openairdocs.org/model/ryan-aeronautical-st-a) (registry code 7830402, 2 seats)
- Engine: [Menasco PIRATE C4 D4](https://openairdocs.org/engine/menasco-pirate-c4-d4) (registry code 43504)
- Data sheets: [TCDS ATC 571](https://openairdocs.org/tcds/ATC%20571) (Ryan Aeronautical Company) (OpenAirDocs)
- Serial number: 312
- Year built: 1939
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: July 14, 1956
- Certificate issued: April 22, 2009
- Expires: July 31, 2027
- Mode S code: A164D4
- Registered owner: [Sundale Aviation Inc](https://openairdocs.org/faa-owner/SUNDALE%20AVIATION%20INC)
- Location: [Erwinna, PA](https://openairdocs.org/faa-place/PA/Erwinna)
- Owner type: Corporation
- Owner's area on the map: 40.4930° N, 75.0867° W: Placed by OpenAirDocs at the center of ZIP code 18920, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=18922
- Page: https://openairdocs.org/aircraft/N18922

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 (Ryan Aeronautical ST-A)

None in force.

### Matched by engine (Menasco PIRATE C4 D4)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N18922.

## FAA accident and incident reports

None matched to N18922.

## 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) (8)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Ryan Aeronautical ST-A)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc
- [STC SA1364GL](https://openairdocs.org/stc/SA1364GL): Surrendered and incorporated into STC SA00478CH. Cooper Aviation Supply Company, Inc
- [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International

## Related

- Other Ryan Aeronautical ST-A aircraft: https://openairdocs.org/model/ryan-aeronautical-st-a/aircraft.md
- The Menasco PIRATE C4 D4 engine: https://openairdocs.org/engine/menasco-pirate-c4-d4.md

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