# N4723U: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 2
- Last cancelled: May 5, 1998
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4723U
- Page: https://openairdocs.org/aircraft/N4723U

## Aircraft that carried N4723U

- [Cancelled 1998-05-05](https://openairdocs.org/deregistered/N4723U-1998-05-05): Boeing 747-122, S/N 19882. Triennial form not returned. Owner: [United Air Lines Inc](https://openairdocs.org/faa-owner/UNITED%20AIR%20LINES%20INC), [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago)
- [Cancelled 1964-08-24](https://openairdocs.org/deregistered/N4723U-1964-08-24): Cessna 180G, S/N 18051423. Exported to Canada. Owner: [Cessna Aircraft Co](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20CO), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

## NTSB investigations on N4723U (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB DCA98MA015](https://openairdocs.org/ntsb/DCA98MA015), Dec 28, 1997: Boeing 747-122 (N4723U), Pacific Ocean (Pacific Ocean), minor damage, 1 fatal. Probable cause: The pilot-in-command's inadvertent flight into adverse weather conditions, and the difficulty of obtaining adequate weather forecasts of over-ocean turbulence. Factors contributing to the accident…

## FAA accident and incident reports on N4723U (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19971228039379A](https://openairdocs.org/incident/19971228039379A), Dec 28, 1997: Boeing 747122 (N4723U), Tokyo, JA, Minor damage, 1 fatal. Narrative: about one hour-forty minutes after takeoff, at 1840Z, in the vicinity of N82-30 latitude, E158-60 longitude, the captain observed slow variations in…
- [Incident 19930804045239I](https://openairdocs.org/incident/19930804045239I), Aug 4, 1993: Boeing 747122 (N4723U), Washington, DC. After departure captain began feeling light headed. Returned. Landed safely. Captain later cleaed by medical.

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