# N4735U: Boeing 747-122, registration cancelled 1998-05-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 4, 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: 19928
- Type of aircraft: Fixed wing multi engine
- Certificate issued: June 21, 1988
- Last registry action: September 20, 1995
- Mode S code: A5CF59
- Owner when cancelled: [United Air Lines Inc](https://openairdocs.org/faa-owner/UNITED%20AIR%20LINES%20INC)
- Location: [Amf Ohare, IL](https://openairdocs.org/faa-place/IL/Amf%20Ohare)
- Physical address: [Elk Grove Township, IL](https://openairdocs.org/faa-place/IL/Elk%20Grove%20Township)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4735U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4735U
- Page: https://openairdocs.org/deregistered/N4735U-1998-05-04

From the FAA registry file of October 29, 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 97UAL900270](https://openairdocs.org/sdr/97UAL900270), Mar 28, 1997: ACTUATOR. FAILED. AFTER TAKEOFF ON GEAR RETRACTION, LEFT WING GEAR AND DOOR LIGHT ILLUMINATED. LIGHT ON IN BOTH PRIMARY AND ALTERNATE POSITIONS. FOLLOWED IRREGULAR PROCEDURES, LI
- [SDR 97UAL900244](https://openairdocs.org/sdr/97UAL900244), Mar 28, 1997: ACTUATOR. FAILED. AFTER TAKEOFF, LEFT WING DOOR LIGHT ILLUMINATED IN BOTH PRIMARY AND ALTERNATE POSITION ACCOMPANIED WITH RED DOOR AND GEAR LIGHT. AIRCRAFT RETURNED TO BKK. REPLA
- [SDR 97UAL900204](https://openairdocs.org/sdr/97UAL900204), Mar 12, 1997: SEQUENCE VALVE. FAILED. AIRCRAFT RETURNED TO FIELD DUE TO LANDING GEAR DOOR WARNING LIGHT. *S/D* REPLACED LWLG UPLOCK SEQUENCE VALVE, SWUNG GEAR SEVERAL TIMES. ACCOMPLISHED VERIFICATIO
- [SDR 97UAL900205](https://openairdocs.org/sdr/97UAL900205), Mar 7, 1997: SEQUENCE VALVE. MALFUNCTIONED. AFTER TAKEOFF, LEFT BODY GEAR DOOR AND LEFT WING DOOR OPEN LIGHTS ILLUMINATED. AIRCRAFT RETURNED TO FIELD. *S/D* REPLACED LBLG UPLOCK SEQUENCE VALVE, LEFT BODY 
- [SDR 96UAL900968](https://openairdocs.org/sdr/96UAL900968), Dec 24, 1996: POWER SUPPLY. INOPERATIVE. EXIT EMERGENCY LIGHT ABOVE UPPER DECK CREW EXIT DOOR IS INOP. REPLACED BATTERY POWER SUPPLY OVER UPPER DECK EMERGENCY EXIT.
- [SDR 96UAL900297](https://openairdocs.org/sdr/96UAL900297), Apr 29, 1996: SLIDE. LEAKING. DURING ROUTINE OVERHAUL OF CREW SLIDE, UNIT FAILED AIR RETENTION TEST DUE TO SEAM LEAKS, POROSITY AND MINOR PUNCTURES. SCRAPPED UNIT.
- [SDR 96UAL900169](https://openairdocs.org/sdr/96UAL900169), Mar 5, 1996: SLIDE. FAILED TEST. SLIDE FAILED AIR RETENTION TEST DURING OVERHAUL. FAILED DUE TO POROSITY. SLIDE SCRAPPED.
- [SDR 95UAL900037](https://openairdocs.org/sdr/95UAL900037), Jul 12, 1995: TUBE. FAILED. SLIDE RAFT WAS FOUND TO HAVE POROSITY ON BOTH THE RT AND LT UPPER TOP TUBES AND IN BOTH ASPIRATOR TUBE AREAS. SCRAPPED SLIDE.

## NTSB investigations (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 OAK76IP007](https://openairdocs.org/ntsb/OAK76IP007), Aug 24, 1975: Boeing 747 (N4735U), No.Pacific Ocean (Pacific Ocean), incident, minor damage

## FAA accident and incident reports (5)

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 19931022047999I](https://openairdocs.org/incident/19931022047999I), Oct 22, 1993: Boeing 747122 (N4735U), Washington, DC. NR1 engine experienced compressor stall on climb. Shut engine down. Returned. Found metal in tail pipe.
- [Incident 19920131005599I](https://openairdocs.org/incident/19920131005599I), Jan 31, 1992: Boeing 747122 (N4735U), Los Angeles, CA. Aircraft departed without the emergency escape hatch properly latched. Returned. Hatch secured after landing.
- [Incident 19890114006679I](https://openairdocs.org/incident/19890114006679I), Jan 14, 1989: Boeing 747122 (N4735U), Honolulu, HI, Minor damage. Compressor stall NR1 engine on takeoff roll. Aborted safely. Noted short engine fire. Turbine blades failed.
- [Incident 19850130006269I](https://openairdocs.org/incident/19850130006269I), Jan 30, 1985: Boeing 747122 (N4735U), Chicago, IL, Minor damage. Baggage container was driven into reverser cowl of nr 4 engine.
- [Incident 19800301027969I](https://openairdocs.org/incident/19800301027969I), Mar 1, 1980: Boeing 747122 (N4735U), Denver, CO. #1R windshield cracked & leaked air. Airplane was depressurized & made unscheduled landing en route.

## Other aircraft with N4735U

- [Cancelled 1964-08-31](https://openairdocs.org/deregistered/N4735U-1964-08-31): Cessna 180G, S/N 18051435. Exported to Costa Rica. 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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