# Grumman HU-16D

- Type: Aircraft model (FAA registry)
- Registry code: 3950413
- Manufacturer (registry): GRUMMAN
- Model: HU-16D
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 2 · Reciprocating
- Seats: 27
- Weight class: 20,000 lb and over
- Cruise speed: 187 mph
- Certification: Type certificated
- Data sheet: [TCDS A33SO](https://openairdocs.org/tcds/A33SO) (OpenAirDocs)
- Holder: Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), c/o Dunlap Bennett & Ludwig, PLLC
- Registered aircraft: 1
- Page: https://openairdocs.org/model/grumman-hu-16d

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023

## Registered aircraft (1)

- [N20861](https://openairdocs.org/aircraft/N20861): [Upper Limit LLC](https://openairdocs.org/faa-owner/UPPER%20LIMIT%20LLC), [Big Lake, AK](https://openairdocs.org/faa-place/AK/Big%20Lake), built 1955, S/N 141278

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports

None matched to aircraft with this model.

## STCs that may be installed (OpenAirDocs) (1)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SA02511SE](https://openairdocs.org/stc/SA02511SE): Installation of replacement fuel quantity indicator sending unit(s). CiES Inc

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