# N3HU: 1953 Grumman HU 16A

- Status: Valid registration
- Airframe: [Grumman HU 16A](https://openairdocs.org/model/grumman-hu-16a) (registry code 3950406, 8 seats)
- Engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020)
- Data sheets: [TCDS A33SO](https://openairdocs.org/tcds/A33SO) (Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), c/o Dunlap Bennett & Ludwig, PLLC) (OpenAirDocs)
- Serial number: 131906
- Year built: 1953
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: August 28, 2018
- Certificate issued: July 26, 2017
- Expires: July 31, 2027
- Mode S code: A31B62
- Registered owner: [Tuthill James G](https://openairdocs.org/faa-owner/TUTHILL%20JAMES%20G)
- Location: [Burr Ridge, IL](https://openairdocs.org/faa-place/IL/Burr%20Ridge)
- Owner type: Individual
- Owner's area on the map: 41.7431° N, 87.9292° W: Placed by OpenAirDocs at the center of ZIP code 60527, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=3HU
- Page: https://openairdocs.org/aircraft/N3HU

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 Wright R-1820 model are included.

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

### Matched by airframe (Grumman HU 16A)

None in force.

### Matched by engine (Wright R-1820 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N3HU.

## FAA accident and incident reports

None matched to N3HU.

## 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) (3)

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 (Grumman HU 16A)

- [STC SA02511SE](https://openairdocs.org/stc/SA02511SE): Installation of replacement fuel quantity indicator sending unit(s). CiES Inc
- [STC SA39CH](https://openairdocs.org/stc/SA39CH): Installation of an Amphibian Landing Gear Position Advisory System/Laser Gear Advisory System. Wipaire Inc
- [STC ST334CH](https://openairdocs.org/stc/ST334CH): Installation of Superflite 102 fabric. Aviation Products Systems Inc

## Earlier aircraft with N3HU

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N3HU before.

- [Cancelled 1991-10-30](https://openairdocs.org/deregistered/N3HU-1991-10-30): Dehavilland DHC-6 TWIN OTTER, S/N 722. Exported to Guatemala. Owner: [Otter Corporation](https://openairdocs.org/faa-owner/OTTER%20CORPORATION), [Kirkland, WA](https://openairdocs.org/faa-place/WA/Kirkland)

## Related

- Other Grumman HU 16A aircraft: https://openairdocs.org/model/grumman-hu-16a/aircraft.md
- The Wright R-1820 series engine: https://openairdocs.org/engine/wright-r-1820-series.md

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