# N4729U: Boeing 747-122, registration cancelled 1998-05-29 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: May 29, 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: 19926 - Type of aircraft: Fixed wing multi engine - Certificate issued: May 16, 1988 - Last registry action: September 20, 1995 - Mode S code: A5CC2E - 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/N4729U - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4729U - Page: https://openairdocs.org/deregistered/N4729U-1998-05-29 From the FAA registry file of October 31, 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 97UAL900517](https://openairdocs.org/sdr/97UAL900517), Jul 9, 1997: LINE. LEAKING. LOSS OF ALL HYDRAULIC FLUID ON NR 1 SYSTEM. *S/D* LEAKING LINE, REPLACED LINE AND UNION. - [SDR 96UAL900134](https://openairdocs.org/sdr/96UAL900134), Feb 20, 1996: LIGHT. FAILED. OVERWING EMERGENCY LIGHT ON LEFT SIDE INOP. REPLACED LIGHT. - [SDR 96UAL900039](https://openairdocs.org/sdr/96UAL900039), Jan 17, 1996: ASPIRATOR ASSY. INOPERATIVE. CREW SLIDE FOUND WITH LARGE WAD OF PACKING PAPER BLOCKING ASPIRATOR FLAPPER DOORS. REMOVED ASPIRATOR FROM SLIDE AND REMOVED PAPER WAD. PAPER WAS INSTALLED IN TH - [SDR 95UAL900294](https://openairdocs.org/sdr/95UAL900294), Dec 6, 1995: CIRCUIT BREAKER. FAILED. SMOKE, SPARKS AND FLAMES SEEN FROM COFFEE MAKER AT GALLEY 411. EXTINGUISHER USED AND CIRCUIT BREAKERS WERE PULLED. REPLACED FAILED CIRCUIT BREAKER AND ENTREE CA - [SDR 95UAL900035](https://openairdocs.org/sdr/95UAL900035), Jul 5, 1995: SMOKE DET. MALFUNCTIONED. FORWARD LOWER CARGO FIRE WARNING LIGHT CAME ON DURING FLIGHT. NO EVIDENCE OF FIRE. REPLACED SMOKE DETECTOR. FOUND GROUND WIRE BROKEN AT PC BOARD GOING TO CONNEC - [SDR 95UAL747025](https://openairdocs.org/sdr/95UAL747025), Apr 26, 1995: EEL. INOPERATIVE. EMERGENCY OVERHEAD LIGHT IS INOPERATIVE AT DOOR 5 LEFT. REPLACED EMERGENCY LIGHT ASSEMBLY AND HARNESS. ## NTSB investigations (3) 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 BFO93WA148](https://openairdocs.org/ntsb/BFO93WA148), Aug 27, 1993: Boeing 747-100 (N4729U), Milan, Italy, incident, no damage - [NTSB LAX92WA091](https://openairdocs.org/ntsb/LAX92WA091), Jan 9, 1992: Boeing 747-100 (N4729U), Narita, Japan, no damage - [NTSB CHI86FA096](https://openairdocs.org/ntsb/CHI86FA096), Mar 4, 1986: Boeing 747-122 (N4729U), Honolulu, HI, no damage ## FAA accident and incident reports (8) 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 19931003051809I](https://openairdocs.org/incident/19931003051809I), Oct 3, 1993: Boeing 747122 (N4729U), Washington, DC. Passenger aboard aircraft allegedly interfered with crew embers inflight. Aircraft met by police. - [Incident 19920109040689I](https://openairdocs.org/incident/19920109040689I), Jan 9, 1992: Boeing 747122 (N4729U), Tokyo, JA. Encountered unexpected severe turbulence. Passenger in aisle at lavatory broke leg. Refused return seat. Belt light - [Accident 19860303005309A](https://openairdocs.org/incident/19860303005309A), Mar 3, 1986: Boeing 747122 (N4729U), Honolulu, HI. Encountered cat at FL330 500 miles east of Honolulu. Passengers and attendents were injured . Continued destination - [Incident 19840111010879I](https://openairdocs.org/incident/19840111010879I), Jan 11, 1984: Boeing 747* (N4729U), San Francisco, CA. A parked helicopter and a twin otter was damaged by the thrust of the 747 as the pilot was turning into the gate. - [Incident 19821023065159I](https://openairdocs.org/incident/19821023065159I), Oct 23, 1982: Boeing 747* (N4729U), Los Angeles, CA, Minor damage. Stewardess caught her toes between the lift and elevator shaft. Broke four toes. Paramedics met aircraft. - [Incident 19810303020229I](https://openairdocs.org/incident/19810303020229I), Mar 3, 1981: Boeing 747122 (N4729U), Los Angeles, CA, Minor damage. Refueling panel found on runway. Determined to have come from ual B747. - [Incident 19800930072059I](https://openairdocs.org/incident/19800930072059I), Sep 30, 1980: Boeing 747/ (N4729U), Chicago, IL. Shutdown engine due to compressor stall on climbout. Metal particles in tailpipe and on turbine blades. - [Incident 19800902082109I](https://openairdocs.org/incident/19800902082109I), Sep 2, 1980: Boeing 747/ (N4729U), Chicago, IL. Takeoff rejected when one engine did not advance. Sequence actuator was stuck in reverse. ## Other aircraft with N4729U - [Cancelled 2022-03-21](https://openairdocs.org/deregistered/N4729U-2022-03-21): Cessna 150E, S/N 15061177, built 1965. Sale reported, canceled. Owner: [Johnstown, CO](https://openairdocs.org/faa-place/CO/Johnstown) --- 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.