Boeing 737-724
N23721 is a Boeing 737-724, a fixed-wing airplane with more than one motor with turbofan engines, built in 1999. It has 149 seats. It is registered to United Airlines INC, a corporation in Chicago, Illinois. The registration is valid: it was issued on March 10, 1999 and expires on October 31, 2029. It holds a standard airworthiness certificate for transport, dated March 9, 1999.
Aircraft
- Maker
- Boeing
- Model
- 737-724 · all 737-724s and related versions
- Serial number
- 28940
- Type
- Fixed-wing, multi-engine
- Power
- Turbofan, 2 motors · Cfm Intl. CFM56 SERIES · 2200 hp
- Seats
- 149
- Year built
- 1999
- Transponder code
- A22539 (octal 50422471)
Registration
- Status
- Valid registration
- Certificate issued
- March 10, 1999
- Expires
- October 31, 2029
- Last FAA action
- September 9, 2023
- Airworthiness
- Standard · Transport · March 9, 1999
- FAA region
- Great Lakes
- FAA record id
- 00323647
Owner as the FAA publishes it
- Name
- United Airlines INC
- Type
- Corporation
- Address
- Attn: Treasurer Willis Tower
233 S Wacker Dr
Chicago, IL 60606-7147
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Records check free · 0 to understand · 5 clear
The public federal record on N23721, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to United Airlines INC, a corporation, certificate issued March 10, 1999, expires October 31, 2029. No fractional interest recorded. [1]
Standard certificate for transport, dated March 9, 1999, consistent with the 1999 manufacture year. [1]
No earlier tail number is recorded against serial 28940 for this model in the deregistered file. [2]
No other airframe has carried N23721 according to the deregistered file. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
No NTSB investigation records located under N23721. CLEAR means the query ran and returned nothing, not that nothing ever happened. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
- FAA Releasable Aircraft Database, master file, file of October 2, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of October 2, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of October 2, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through August 27, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this record on the FAA site · This record as data