# N25DF: 1943 Grumman G-44

- Status: Valid registration
- Airframe: [Grumman G-44](https://openairdocs.org/model/grumman-g-44) (registry code 3951502, 5 seats)
- Engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521)
- Data sheets: [TCDS A-734](https://openairdocs.org/tcds/A-734) (Frakes Aviation) (OpenAirDocs)
- Serial number: 1306
- Year built: 1943
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Certificate issued: August 28, 1992
- Expires: January 31, 2028
- Mode S code: A25576
- Registered owner: [Hough Robert M](https://openairdocs.org/faa-owner/HOUGH%20ROBERT%20M)
- Location: [Windham, NH](https://openairdocs.org/faa-place/NH/Windham)
- Owner type: Individual
- Owner's area on the map: 42.8111° N, 71.3027° W: Placed by OpenAirDocs at the center of ZIP code 03087, 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=25DF
- Page: https://openairdocs.org/aircraft/N25DF

From the FAA registry file of October 21, 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 Lycoming GO-435C&D model are included.

## ADs that may apply (OpenAirDocs): 3 in force

### Matched by airframe (Grumman G-44)

- [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 54-26-01](https://openairdocs.org/ad/54-26-01): Landing Gear Valve Placard · Gulfstream American G-44 and G-44A
- [AD 48-31-01](https://openairdocs.org/ad/48-31-01): Stabilizer Strut · Gulfstream American G-44 and G-44A

### Matched by engine (Lycoming GO-435C&D series)

None in force.

## Information bulletins (advisory) (1 in force)

- [SAIB SW-18-31](https://openairdocs.org/saib/SW-18-31): NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM. Issued Nov 21, 2018

## NTSB investigations

None matched to N25DF.

## FAA accident and incident reports

None matched to N25DF.

## Service difficulty reports

None filed for this aircraft.

## Related

- Other Grumman G-44 aircraft: https://openairdocs.org/model/grumman-g-44/aircraft.md
- STCs for the Grumman G-44: https://openairdocs.org/model/grumman-g-44/stcs.md
- The Lycoming GO-435C&D series engine: https://openairdocs.org/engine/lycoming-go-435c-d-series.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.