# N4728U: Boeing 747-122, registration cancelled 1999-04-14

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 14, 1999
- 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: 19925
- Type of aircraft: Fixed wing multi engine
- Certificate issued: May 16, 1988
- Last registry action: September 16, 1998
- Mode S code: A5CC0B
- 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)
- Physical address: [Elk Grove Township, IL](https://openairdocs.org/faa-place/IL/Elk%20Grove%20Township)
- 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/N4728U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4728U
- Page: https://openairdocs.org/deregistered/N4728U-1999-04-14

From the FAA registry file of November 5, 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 (8)

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

- [SDR 98UAL900208](https://openairdocs.org/sdr/98UAL900208), May 25, 1998: SMOKE DETECTOR. MALFUNCTIONED. FORWARD LOWER CARGO FIRE INDICATED IN FLIGHT. EXTINGUISHING AGENT FIRED INTO COMPARTMENT. *S/D* FOUND NO EVIDENCE OF FIRE IN FWD CARGO COMPT. BOTH SMOKE DETECTO
- [SDR 98UAL900039](https://openairdocs.org/sdr/98UAL900039), Jan 25, 1998: SWITCH. FAILED. ENGINE BACKFIRE, POP DURING LANDING ROLL WITH ACCOMPANYING FLASH NOTICED FROM CABIN. NO ABNORMAL ENGINE INDICATIONS. *S/D* WHEN THE STALL IN REVERSE OCCURRED TH
- [SDR 97UAL900598](https://openairdocs.org/sdr/97UAL900598), Aug 5, 1997: BULB. FAILED. BOTH FORWARD AND AFT FOOD CART ELEVATOR EMERGENCY LIGHTS HAVE BURNT OUT BULBS. REPLACED BULBS, CHECKED OK.
- [SDR 97UAL900397](https://openairdocs.org/sdr/97UAL900397), May 23, 1997: CARBON SEAL. DAMAGED. NR 4 ENGINE SHUTDOWN DUE TO LOSS OF OIL PRESSURE. LANDED AT LAX UNDER AMBER ALERT. *S/D* CSD QUICK ATTACH DEVICE WORKED LOOSE CAUSING EXCESSIVE PRESSURE ON THE 
- [SDR 96UAL900687](https://openairdocs.org/sdr/96UAL900687), Sep 6, 1996: CENTER TUBE. WORN. DURING TIME CONTROLLED OVERHAUL WEAR WAS FOUND IN THE CENTER INFLATION TUBE AND SLIDING SURFACE. PATCHED TUBE AND SLIDING SURFACE PER VENDOR MANUAL
- [SDR 96UAL900132](https://openairdocs.org/sdr/96UAL900132), Feb 20, 1996: ASPIRATOR. SHEARED. DURING TEST INFLATION OF DOOR 5 RT SLIDE, AT OVERHAUL ONE ASPIRATOR SHEARED IN TWO. SHEAR POINT IS LOCATED BELOW THE RETAINING BANDS WHICH HOLD THE ASPIRATOR IN
- [SDR 95UAL900253](https://openairdocs.org/sdr/95UAL900253), Nov 9, 1995: BATTERY PACK. DISCHARGED. EMERGENCY EXIT LIGHTS STAY ON E-ZONE AT DOOR 5 CROSS AISLE. REPLACED EEL BATTERY PACK.
- [SDR 95UAL900125](https://openairdocs.org/sdr/95UAL900125), Sep 11, 1995: EEL BATTERY. DISCHARGED. DOOR MOUNTED EMERGENCY LIGHTS AT SEVERAL MAIN ENTRY DOORS INOP. REPLACED CONNECTOR, BATTERY PACK AND REPAIRED DAMAGED SPLICE.

## FAA accident and incident reports (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.

- [Incident 19890112015789I](https://openairdocs.org/incident/19890112015789I), Jan 12, 1989: Boeing 747122 (N4728U), Honolulu, HI. Aborted 2 takeoffs due to asymetrical power. Took off and landed. 8 tires went flat due to overheat while taxiing.
- [Incident 19810817060409I](https://openairdocs.org/incident/19810817060409I), Aug 17, 1981: Boeing 747* (N4728U), Honolulu, HI. Zr inflight fire in lavatory trash bin extinguished by cabin crew. No damage.

## Other aircraft with N4728U

- [Cancelled 1964-08-24](https://openairdocs.org/deregistered/N4728U-1964-08-24): Cessna 180G, S/N 18051428. Exported to Canada. Owner: [Cessna Aircraft Co](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20CO), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

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