Twin piston

N5548A

1959 Grumman G-21A

Registered 2 NTSB/FAA records
Built
1959
Serial
75-7661
Class
Twin piston
Engines
2 × Pratt & Whitney R-985 series
Status
Current as of October 2026
Registered owner
Stage One Associates LLC (LLC)
Based
Oxford, CT
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Registration record

N5548A on the FAA register

Type
1959 Grumman G-21A
Serial
75-7661
Engines
2 × Pratt & Whitney R-985 series
Registered owner
Stage One Associates LLC
Oxford, CT
Certificate issued
2026-04-01
Airworthiness date
1960-03-25
Registration expires
2033-04-30
Airworthiness class
Standard
Mode S (hex)
A711B8
Mode S (octal)
51610670
Seats (type)
8
Weight class
up to 12,499 lb
Range (type)
695 nm
Cruise (type)
166 kt
Status
Current as of October 2026
Registry history

Timeline

  • 2033-04-30
    Registration expires (renewal due).
  • 2026-04-01
    Certificate of registration issued as N5548A.
  • 1999-03-25
    Accident at Lauderdale Lake, FL; damage: destroyed.
  • 1966-03-19
    Accident at C.Amalie St.Th.Vi, 62; damage: substantial.
  • 1960-03-25
    Airworthiness date on the current FAA record (standard category).
  • 1959
    Manufactured (1959).
Overview

About N5548A

N5548A is a 1959 Grumman G-21A, serial number 75-7661. The FAA register lists Stage One Associates LLC as the registrant in Oxford, Connecticut. The current certificate of registration was issued on April 1, 2026 and expires on April 30, 2033.

The FAA aircraft reference file describes the type as a twin piston, two Pratt & Whitney R-985 series engines and 8 seats. Published figures for the type give a cruise speed of about 166 knots and a range of about 695 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category, dated March 25, 1960.

N5548A has 2 accident/incident records on file (most serious damage: destroyed); details are below.

Cruise
166 kt
Range
695 nm
Fuel burn
16 gph

Published figures for the Grumman G-21A type. They describe the model, not this airframe's equipment or condition.

Safety record

Accident & incident history

1999-03-25 Accident · Lauderdale Lake, FL Damage: Destroyed Fatal injury NTSB · MIA99FA114
Reported aircraft: Grumman G-21A
Probable cause: The pilots failure to correctly identify an in-flight emergency (fluctuating manifold pressure and rpm due to a disconnected spark plug lead / unscrewed ignition lead shroud) and failure to complete the engine shutdown procedure once it was initiated (propeller not feathered). This resulted in a forced landing and subsequent in-flight collision with a tree, dirt bank and canal. Contributing to the accident was the FAA inspectors improper supervision of the pilot, and the improper supervision of the inspector by her supervisor, in his failure to follow written procedures / directives in assigning a non-current inspector to conduct a competency flight.
1966-03-19 Accident · C.Amalie St.Th.Vi, 62 Damage: Substantial NTSB · 2 0362
Reported aircraft: Grumman G-21A

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

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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.