Registry / Boeing / 737-724 / N25705

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N25705 V

Boeing 737-724 · 1998 · Chicago, IL

This aircraft — FAA registration facts

N25705 is a 1998 Boeing 737-724 (serial 28766), registered to United Airlines Inc (corporation) in Chicago, IL. Its FAA registration is recorded as v and expires March 2030; the airworthiness certificate dates from May 1998 (28 years ago). It carries 2 Ama/Expr UNKNOWN ENG engines, the engine on 3% of registered Boeing 737-724s. Its Mode-S transponder broadcasts the ICAO 24-bit address A273F5. It is one of 36 Boeing 737-724 aircraft on the FAA registry. United Airlines Inc holds 1,218 aircraft on the registry.

Registered owner
United Airlines Inc
Owner type
Corporation
Based in
Chicago, IL
Serial number
28766
Year built
1998 · 28 yrs old
Airworthiness class
Standard – Transport
FAA status
V
Mode-S / ICAO24
A273F5 · 50471765 octal
Certificate issued
Mar 22, 2017
Airworthiness date
May 12, 1998
Last FAA activity
Feb 24, 2023
Registration expires
Mar 31, 2030
FAA region
Central

Source: FAA aircraft registry (public record). Community reviews and photos below.

Engine on this aircraft

Engine
Ama/Expr UNKNOWN ENG
Engine type
Turbo-fan
FAA engine code
99999

1 of the 36 registered Boeing 737-724 carry this engine (3%), across 3 engine variants on the type.

Source: FAA engine reference (ENGINE.txt), matched on this registration's engine code.

Community facts about N25705

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Flight history & live tracking recent positions on file

ICAO24: a273f5
Last known — 5 days ago UAL2351
Observed 2026-10-21 18:20:27 MST
Auto-refresh • Updated 0s ago
Ground speed
0 kt
Altitude (baro)
GROUND
Track
—
Squawk
—
Wind / OAT
—
Autopilot target
—
Lat 41.98105, Lng -87.91057
Map loads when scrolled into view …
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Aircraft Type — ACFTREF 13844BY

Boeing 737-724
Engines: 2
Type: jet
Seats: 149
Category: Standard

Engine — CODE 99999

Manufacturer: Ama/Expr
Model: UNKNOWN ENG
Type:

FAA Registration Record

N-Number: N25705
Serial Number: 28766
Year Manufactured: 1998
ACFTREF Code: 13844BY
Engine Code: 99999
Status: V (V)
Certification: Standard – Transport
Type Aircraft: Fixed Wing Multi Engine (5)
Type Engine: Turbo-fan (5)
Source: master

Documents & resources

Commonly available reference sources for the Boeing 737-724. Always confirm against the manufacturer's current, authoritative publication for your specific aircraft.

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Transponder / ADS-B

Mode S (octal): 50471765
ICAO 24-bit (hex): A273F5

Registrant

United Airlines Inc
Corporation
View all 1,218 aircraft registered to this owner →
233 S Wacker Dr
Chicago, IL, 606067147
FAA Region: Central

Key Dates

Certificate Issued Mar 22, 2017
Airworthiness May 12, 1998
Expiration Mar 31, 2030
Last Activity Feb 24, 2023
Data as of Oct 5, 2026

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