Single-engine piston

N521AG

1979 Mooney M20K 231

Registered No accidents on file
Built
1979
Serial
25-0139
Class
Single-engine piston
Engines
Continental TSIO-360 series
Status
Current as of October 2026
Registered owner
LLC
Based
—
1979 Mooney M20K 231
Representative photo of a Mooney M20K 231. Not a photo of N521AG.
Registration record

N521AG on the FAA register

Type
1979 Mooney M20K 231
Serial
25-0139
Engines
Continental TSIO-360 series
Registered owner
—
Certificate issued
2013-01-10
Airworthiness date
1979-04-30
Registration expires
2029-01-31
Airworthiness class
Standard · normal
Mode S (hex)
A68CAC
Mode S (octal)
51506254
Seats (type)
4
Weight class
up to 12,499 lb
Range (type)
980 nm
Cruise (type)
191 kt
Status
Current as of October 2026
Market asking range
$121,250 to $149,750
Middle half of 20 live Mooney M20K 231 listings, 1979–1985 models (median $139,950). Asking prices, not an appraisal of N521AG.
Registry history

Timeline

  • 2029-01-31
    Registration expires (renewal due).
  • 2013-01-10
    Certificate of registration issued as N521AG.
  • 1979-04-30
    Airworthiness date on the current FAA record (standard category (normal)).
Overview

About N521AG

N521AG is a 1979 Mooney M20K 231, serial number 25-0139. It is registered to a llc. The current certificate of registration was issued on January 10, 2013 and expires on January 31, 2029.

The FAA aircraft reference file describes the type as a single-engine piston, one Continental TSIO-360 series engine and 4 seats. Published figures for the type give a cruise speed of about 191 knots and a range of about 980 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category (normal), dated April 30, 1979.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N521AG.

Cruise
191 kt
Range
980 nm
Power / thrust (each)
210
Takeoff over 50 ft
2,060 ft
Landing over 50 ft
2,280 ft
Fuel burn
13 gph

Published figures for the Mooney M20K 231 type. They describe the model, not this airframe's equipment or condition. Mooney M20K 231 specs, prices and for-sale inventory →

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N521AG.

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

Same model

More Mooney M20K 231 aircraft

All 771 Mooney M20K 231 registrations →
Similar aircraft

Other single-engine pistons on the register

More from Mooney

Mooney models on the register

Own N521AG?

Get a free valuation, digitize the logbooks, or list it on fyiAero.

Free valuation Logbook transcription

Browse: Mooney aircraft for sale· Mooney M20K 231 overview· 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.