Twin piston

N85303

1951 Grumman HU-16B

Registered No accidents on file
Built
1951
Serial
51-5303
Class
Twin piston
Engines
2 × Wright R-1820 series
Status
Current as of October 2026
Registered owner
Duckbutt LLC (LLC)
Based
Castle Rock, CO
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Registration record

N85303 on the FAA register

Type
1951 Grumman HU-16B
Serial
51-5303
Engines
2 × Wright R-1820 series
Registered owner
Duckbutt LLC
Castle Rock, CO
Certificate issued
2024-04-18
Airworthiness date
2023-02-04
Registration expires
2031-04-30
Airworthiness class
Experimental · exhibition
Mode S (hex)
ABB4F1
Mode S (octal)
52732361
Seats (type)
8
Weight class
20,000 lb and over
Range (type)
2,478 nm
Cruise (type)
142 kt
Status
Current as of October 2026
Registry history

Timeline

  • 2031-04-30
    Registration expires (renewal due).
  • 2024-04-18
    Certificate of registration issued as N85303.
  • 2023-02-04
    Airworthiness date on the current FAA record (experimental category (exhibition)).
  • 1951
    Manufactured (1951).
Overview

About N85303

N85303 is a 1951 Grumman HU-16B, serial number 51-5303. The FAA register lists Duckbutt LLC as the registrant in Castle Rock, Colorado. The current certificate of registration was issued on April 18, 2024 and expires on April 30, 2031.

The FAA aircraft reference file describes the type as a twin piston, two Wright R-1820 series engines and 8 seats. Published figures for the type give a cruise speed of about 142 knots and a range of about 2,478 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is experimental category (exhibition), dated February 4, 2023.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N85303.

Cruise
142 kt
Range
2,478 nm
Fuel burn
13 gph

Published figures for the Grumman HU-16B type. They describe the model, not this airframe's equipment or condition.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N85303.

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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Browse: Grumman aircraft for sale· Aircraft registered in Colorado· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.