# N57E: 1938 Howard DGA-11

- Status: Valid registration
- Airframe: [Howard DGA-11](https://openairdocs.org/model/howard-dga-11) (registry code 4690302, 5 seats)
- Engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008)
- Data sheets: [TCDS TC 672](https://openairdocs.org/tcds/TC%20672) (Howard Aircraft Foundation) (OpenAirDocs)
- Serial number: 88
- Year built: 1938
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: June 12, 1961
- Certificate issued: May 8, 2015
- Expires: May 31, 2028
- Mode S code: A74C74
- Registered owner: [Terry Michael R Trustee](https://openairdocs.org/faa-owner/TERRY%20MICHAEL%20R%20TRUSTEE)
- Location: [Santa Paula, CA](https://openairdocs.org/faa-place/CA/Santa%20Paula)
- Owner type: Individual
- Owner's area on the map: 34.3868° N, 119.0941° W: Placed by OpenAirDocs at the center of ZIP code 93060, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=57E
- Page: https://openairdocs.org/aircraft/N57E

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 Pratt & Whitney R-985 model are included.

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

### Matched by airframe (Howard DGA-11)

None in force.

### Matched by engine (Pratt & Whitney R-985 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N57E.

## FAA accident and incident reports

None matched to N57E.

## 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) (9)

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 (Howard DGA-11)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA02594SE](https://openairdocs.org/stc/SA02594SE): SkyView HDX Instrumentation and Autopilot System manufactured. Dynon Avionics
- [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC
- [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc
- [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation
- [STC SA02283SE PAGE 1](https://openairdocs.org/stc/SA02283SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc
- [STC SA02402SE PAGE 1](https://openairdocs.org/stc/SA02402SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc

## Earlier aircraft with N57E

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N57E before.

- [Cancelled 1965-05-18](https://openairdocs.org/deregistered/N57E-1965-05-18): Howard DGA-11, S/N 87, built 1938. Owner: [Casparis John O](https://openairdocs.org/faa-owner/CASPARIS%20JOHN%20O), [Alpine, TX](https://openairdocs.org/faa-place/TX/Alpine)
- [Cancelled 1930-10-18](https://openairdocs.org/deregistered/N57E-1930-10-18): Dehavilland DH-4B, S/N 395, built 1918. Owner: [Parks Tom D/Safe Way Airlines](https://openairdocs.org/faa-owner/PARKS%20TOM%20D%2FSAFE%20WAY%20AIRLINES), [Tulsa, OK](https://openairdocs.org/faa-place/OK/Tulsa)

## Related

- Other Howard DGA-11 aircraft: https://openairdocs.org/model/howard-dga-11/aircraft.md
- The Pratt & Whitney R-985 series engine: https://openairdocs.org/engine/pratt-whitney-r-985-series.md

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