Twin piston

N4575C

Grumman G-21A

Registered No accidents on file
Built
—
Serial
B-120
Class
Twin piston
Engines
2 × Pratt & Whitney R-985 series
Status
Current as of October 2026
Registered owner
International Air Services Inc Trustee (Corporation)
Based
Carson City, NV
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Registration record

N4575C on the FAA register

Type
Grumman G-21A
Serial
B-120
Engines
2 × Pratt & Whitney R-985 series
Registered owner
International Air Services Inc Trustee
Carson City, NV
Certificate issued
2026-10-08
Airworthiness date
1983-12-12
Registration expires
2033-10-31
Airworthiness class
Standard · normal
Mode S (hex)
A58F27
Mode S (octal)
51307447
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

  • 2033-10-31
    Registration expires (renewal due).
  • 2026-10-08
    Certificate of registration issued as N4575C to the current registrant.
  • 1983-12-12
    Airworthiness date on the current FAA record (standard category (normal)).
  • 1957-05-14
    N4575C previously assigned to a Cessna 170B (s/n 25519); cancelled.
Overview

About N4575C

N4575C is a Grumman G-21A, serial number B-120. The FAA register lists International Air Services Inc Trustee as the registrant in Carson City, Nevada. The current certificate of registration was issued on October 8, 2026 and expires on October 31, 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 (normal), dated December 12, 1983.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N4575C.

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

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N4575C.

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.