Single-engine piston

N51UD

2017 Cessna 172S

Registered No accidents on file
Built
2017
Serial
172S12088
Class
Single-engine piston
Engines
Lycoming IO-360-L2A
Status
Current as of October 2026
Registered owner
Alf Ix LLC (LLC)
Based
Chicago, IL
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2017 Cessna 172S
Representative photo of a Cessna 172S. Not a photo of N51UD.
Registration record

N51UD on the FAA register

Type
2017 Cessna 172S
Serial
172S12088
Engines
Lycoming IO-360-L2A
Registered owner
Alf Ix LLC
Chicago, IL
Certificate issued
2022-11-03
Airworthiness date
2017-10-30
Registration expires
2029-11-30
Airworthiness class
Standard · normal, utility
Mode S (hex)
A660DC
Mode S (octal)
51460334
Seats (type)
4
Weight class
up to 12,499 lb
Range (type)
517 nm
Cruise (type)
124 kt
Status
Current as of October 2026
Registry history

Timeline

  • 2029-11-30
    Registration expires (renewal due).
  • 2022-11-03
    Certificate of registration issued as N51UD to the current registrant.
  • 2017-10-30
    Airworthiness date on the current FAA record (standard category (normal, utility)).
  • 1999-03-02
    N51UD previously assigned to a Homebuilt Mustang (s/n 001); cancelled.
Overview

About N51UD

N51UD is a 2017 Cessna 172S, serial number 172S12088. The FAA register lists Alf Ix LLC as the registrant in Chicago, Illinois. The current certificate of registration was issued on November 3, 2022 and expires on November 30, 2029.

The FAA aircraft reference file describes the type as a single-engine piston, one Lycoming IO-360-L2A engine and 4 seats. Published figures for the type give a cruise speed of about 124 knots and a range of about 517 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category (normal, utility), dated October 30, 2017.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N51UD.

Cruise
124 kt
Range
517 nm
Power / thrust (each)
180
Takeoff over 50 ft
1,630 ft
Landing over 50 ft
1,335 ft
Fuel burn
10 gph

Published figures for the Cessna 172S type. They describe the model, not this airframe's equipment or condition. Cessna 172S 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 N51UD.

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

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Browse: Cessna aircraft for sale· Cessna 172S overview· Aircraft registered in Illinois· 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.