FAA Aircraft Registry · Live Lookup · As of Apr 28, 2026
N23721 — Boeing 737-724
Rendered live from the FAA Aircraft Registry (refreshed weekly). This tail has no NTSB events or airworthiness directives indexed against it — type-level history is on the type page below.
Registration
Registrant
UNITED AIRLINES INC
Registrant Type
Corporation
Location
CHICAGO, IL
Status
Registration Valid
Certificate Issued
Mar 10, 1999
Airworthiness Date
Mar 9, 1999
Registration Expires
Oct 31, 2029
Last Action
Sep 9, 2023
Aircraft
Serial Number
28940
Year Manufactured
1999
Aircraft Type
Fixed Wing Multi Engine
Certification
Standard (+1 flag)
Engine
CFM INTL. CFM56 SERIES
Engines / Seats
2 / 149
Weight Class
CLASS 3
Mode S (Hex)
A22539
Type History
Boeing 737-724 type page → — 36 registered · 13 NTSB records · 0 airworthiness directives
Live position via ICAO24 A22539
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