# N4718U: Boeing 747-122, registration cancelled 1998-02-17

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 17, 1998
- Status when cancelled: Triennial form not returned
- Airframe: [Boeing 747-122](https://openairdocs.org/model/boeing-747-122) (registry code 1384872)
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE) (OpenAirDocs)
- Serial number: 19879
- Type of aircraft: Fixed wing multi engine
- Certificate issued: July 2, 1971
- Last registry action: September 20, 1995
- Mode S code: A5C854
- Owner when cancelled: [United Air Lines Inc](https://openairdocs.org/faa-owner/UNITED%20AIR%20LINES%20INC)
- Location: [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago)
- Owner type: Corporation
- Owner's area on the map: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4718U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4718U
- Page: https://openairdocs.org/deregistered/N4718U-1998-02-17

From the FAA registry file of November 4, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Boeing 747-122: https://openairdocs.org/model/boeing-747-122.md

## Service difficulty reports (6)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 97UAL900217](https://openairdocs.org/sdr/97UAL900217), Mar 17, 1997: STRIP. INOPERATIVE. EMERGENCY EXIT LIGHTING BETWEEN MED'S NR 5 INOP. REPLACED EMERGENCY EXIT LIGHTING STRIP. OPERATION CHECKS NORMAL.
- [SDR 97UAL900192](https://openairdocs.org/sdr/97UAL900192), Mar 10, 1997: SKIN. CRACKED. LONGITUDINAL CRACK IN SKIN PANEL APPROXIMATELY 1 INCH LONG AT STATION 2022. CRACK IS 0.5 INCH ABOVE AND OUTBOARD OF STRINGER 45 CENTERLINE. THE CRACK IS BETWEEN
- [SDR 97UAL900065](https://openairdocs.org/sdr/97UAL900065), Jan 4, 1997: POWER FEEDER. FAILED. EMERGENCY EXIT LIGHT, INOP ON RIGHT HAND AISLE FROM SEATS 21 TO 26. REPLACED POWER FEEDER FROM SIDEWALL TO ROW 27.
- [SDR 96UAL900113](https://openairdocs.org/sdr/96UAL900113), Feb 14, 1996: SLIDE. FAILED TEST. DURING OVERHAUL, DOOR 2 RIGHT SLIDE FAILED AIR RETENTION TEST DUE TO POROSITY ON BOTH FILL TUBES. PATCHED AREAS OF POROSITY.
- [SDR 95UAL900080](https://openairdocs.org/sdr/95UAL900080), Aug 3, 1995: SLIDE. FAILED. SLIDE FAILED AIR RETENTION TEST. SCRAPPED SLIDE.
- [SDR 95UAL900040](https://openairdocs.org/sdr/95UAL900040), Jul 13, 1995: TUBE. FAILED. SLIDE HAS POROSITY ON BOTH LT AND RT UPPER TOP TUBES, ASPIRATOR TUBE AREAS, AND ON THE ASPIRATOR TUBE SLEEVE. SCRAPPED SLIDE.

## NTSB investigations (2)

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 CHI87FA081](https://openairdocs.org/ntsb/CHI87FA081), Feb 12, 1987: Boeing 747-122 (N4718U), Detroit, MI, no damage
- [NTSB LAX86MA275](https://openairdocs.org/ntsb/LAX86MA275), Jun 24, 1986: Boeing 747-122 (N4718U), Pacific Ocean (Pacific Ocean), incident, no damage

## FAA accident and incident reports (3)

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 19870211003519A](https://openairdocs.org/incident/19870211003519A), Feb 11, 1987: Boeing 747122 (N4718U), Detroit, MI. Bomb threat caused non scheduled landing and evacuation. Some slides failed, one detached by error. Several injured
- [Incident 19861024079641I](https://openairdocs.org/incident/19861024079641I), Oct 24, 1986: Boeing 747122 (N4718U), Chicago, IL, Substantial damage. During turn onto taxiway, right wingtip struck rudder of N607AW.
- [Incident 19830419020189I](https://openairdocs.org/incident/19830419020189I), Apr 19, 1983: Boeing 747122 (N4718U), Chicago, IL. Turning into the gate area from taxiway the jet blast from engine overturned a parked food truck.

## Other aircraft with N4718U

- [Cancelled 1964-07-07](https://openairdocs.org/deregistered/N4718U-1964-07-07): Cessna 180G, S/N 18051418. Exported to Canada. Owner: [Cessna Aircraft Co](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20CO), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.