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Aircraft record

N157121998 Boeing 737-724

Registration validUnclaimedSource: FAA, updated Oct 20, 2026

Safety record in brief:No NTSB accidents or incidents since 198221 ADs may apply105 service difficulty reports

Registration
Valid
expires Mar 31, 2028
Based in
Chicago, IL
owner city / state
Engine
CFM56 SERIES · 2200 hp
Cfm Intl.
Owners
1
since 2018
NTSB events
None
since 1982
ADs may apply
21
confirm with A&P
Service reports
105
since 1995

Registration

FAA Aircraft Registry · Oct 20, 2026
Registered owner
United Airlines INC
Owner type
Corporation
City, state
Chicago, IL
Certificate issued
Mar 13, 2018
Expires
Mar 31, 2028
Airworthiness
Standard · Transport
Airworthiness date
Sep 23, 1998

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer
Boeing
Model
737-724
Year
1998
Serial number
28783
Aircraft type
Fixed wing multi engine
Category
Land
Certification
Type Certificated
Seats
149
Engines
2
Max takeoff weight
20,000 and over lb
Mode S code
A0E6C6

Engine

Make and model
Cfm Intl. Cfm56 Series
Type
Turbo-fan
Power
2200 hp

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. 2018 – nowUnited Airlines INCChicago, IL · current
  2. until 1972Trans World Airlines INCKansas City, MO · different airframe: Boeing 707-331c S/N 20068

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 20, 2026 · SDRs · Oct 16, 2026

NTSB events (0)

No NTSB accidents or incidents found for this airframe since 1982.

Accident history for this model

ADs published since 1998 that may apply (21)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

ADSubjectEffectiveApplies to
2019-14-02Hydraulic powerAug 27, 2019Airframe (737-724)
2002-20-07 R1Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-724)
2002-20-07Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-724)
2001-11-11Boeing Model 737, 747, and 777 Series AirplanesJul 16, 2001Airframe (737-724)Serial numbers per Boeing Service Bulletins 737-25-1371 Rev 2, 737-25-1407, 747-25-3196 Rev 1, 777-25-0111 Rev 1
2001-10-14Boeing Model 737, 747, 757, 767, and 777 Series AirplanesJun 8, 2001Airframe (737-724)Serial numbers per Boeing Special Attention Service Bulletins 737-35-1076, 737-35-1077, 747-35-2111, 757-35-0021, 757-35-0022, 767-35-0043, 767-35-0044, 777-35-0008, all dated March 1, 2001. Only with: Equipped with chemical oxygen generators.
Show all 21 ADs
ADSubjectEffectiveApplies to
2001-08-24Boeing Model 737 Series AirplanesMay 10, 2001Airframe (737-724)
2000-22-02 R1Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-724)
2000-22-02Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-724)
2000-15-16Boeing Model 737, 757, 767, and 777 Series AirplanesSep 12, 2000Airframe (737-724)Certain serial numbers: 737 1–2984; 757 1–798; 767 1–682; 777 1–083. Only with: Ranges are line numbers; equipped with Puritan-Bennett passenger and flight attendant oxygen masks as listed in Boeing Service Bulletins 737-35-1049, 757-35-0014, 767-35-0033, or 777-35-0005.
99-11-05Boeing Model 737 Series AirplanesJun 28, 1999Airframe (737-724)
99-22-16Boeing Model 737 Series AirplanesDec 7, 1999Airframe (737-724)Serial numbers per Boeing Service Bulletin 737-52-1128, dated April 22, 1999, or Boeing Service Bulletin 737-52-1137, dated May 13, 1999
98-13-12 R1Boeing Model 737, 747, 757, 767, and 777 Series AirplanesDec 28, 1998Airframe (737-724)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368 Revision 2, 757-27A0128, 767-27A0156, 777-27A0029 Revision 1
98-22-10Boeing Model 737 Series AirplanesNov 12, 1998Airframe (737-724)Serial numbers per Boeing Service Bulletin 737-53A1108, Revision 5, dated October 26, 1989
98-18-20Boeing Model 727 and Model 737 Series Airplanes Equipped with J.C. Carter Company Fuel…Oct 21, 1998Airframe (737-724)Only with: Equipped with J.C. Carter Company fuel valve actuators P/N 40574-2 (Kearfott Models 3715-7 and -8) or 40574-5 (Kearfott Model 3715-9).
98-13-12Boeing Model 737, 747, 757, 767, and 777 Series AirplanesJul 6, 1998Airframe (737-724)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368, 757-27A0128, 767-27A0156, and 777-27A0029, dated March 26, 1998
98-03-10Boeing Model 737, 747, 757, and 767 Series AirplanesFeb 19, 1998Airframe (737-724)Certain serial numbers: 737 1–2836; 747 1–1104; 757 1–731; 767 1–642. Only with: Equipped with non-powered IPECO pilots' seats; ranges are line position numbers.
97-22-07Boeing Model 737 Series AirplanesNov 12, 1997Airframe (737-724)Certain serial numbers: 737 292–2565. Only with: Limited to airplanes with line numbers 292 through 2565 inclusive.
97-18-06Boeing Model 737 Series AirplanesNov 12, 1997Airframe (737-724)
97-05-10Boeing Model 737 Series AirplanesMar 19, 1997Airframe (737-724)Only with: Having a main rudder power control unit (PCU) identified in Boeing Service Letter 737-SL-27-112-B, dated February 6, 1997.
97-04-01Boeing Model 737 Series AirplanesMar 21, 1997Airframe (737-724)Serial numbers per Boeing Service Bulletin 737-27-1155, dated October 26, 1989, as revised by Notices of Status Change 737-27-1155NSC1, NSC2, and NSC3
95-23-10Boeing Model 737 Series AirplanesDec 13, 1995Airframe (737-724)

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (105)

Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.

  • Air conditioning and pressurization · outflow valve · faultedOct 9, 2026

    THIS IS A LEVEL"A" CHRONIC FOR AUTO FAIL LIGHT ILLUMINATED AND ALTN LIGHT ILLUMINATED. HAD SEVERAL LRU'S REPLACED DUE TO DECAY CHECK ISSUES. BITE FAULTED CPC1 OFV OR WIRING. CHANGED OUTFLOW VALVE AND TS WIRING TO OUTFLOW VALVE T/S IAW FIM 21-31 TASK 801. WIRING CHECKS GOOD, BETWEEN #1 PRESSURE…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Ice and rain protection · warning light · illuminatedOct 6, 2026

    WINDOW HEAT OVERHEAT LIGHT ON RT SIDE. FOUND NR 2 RIGHT SIDE WINDOW HEAT INOPERATIVE. MEL 3011K APPLIED. FO NOTED POSSIBLE ELECTRICAL ARCING ODOR PRIOR TO WINDOW HEAT LIGHT COMING ON. RAN BITE TEST OF WHCU SYS SEVERAL TIMES IN REF AMM 30-41 TASK 801. NO FAULTS FOUND. OPS TEST GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Equipment and furnishings · unknown · odorFeb 21, 2026

    FA REPORTED RUBBER TYPE ODOR IN AFT GALLEY WHILE DISARMING DOORS COULD NOT REPLICATE FAULT, NO PRESENCE OF RUBBERY SMELL. IAW GMM 06-35-10. NO FAULTS AT THIS TIME ACFT OK FOR SERVICE.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 10 reports
  • Lights · light · detachedJan 16, 2026

    EMERGENCY LIGHTING & WIRES HANGING DOWN AT ROW 29C. ASSEMBLY BROKEN. SECURED LIGHT HOUSING TO SEAT AT 29C, PLACED ON MEL, DDP C/W SECURED LIGHT HOUSING TO SEAT AT 29C, PLACED ON MEL, DDP C/W DEFERRED. *DM* ADDED LIGHT ASSY & BRACKETS AS NEEDED. REMOVED AND REPLACED EMERGENCY LIGHT ASSEMBLY AT ROW…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Equipment and furnishings · girt bar · not seatedJan 14, 2026

    GIRT BAR FELL ON THE FLOOR AS DOOR 1L WAS CLOSING, SLIDE RAFT APPEARS LOOSE. FOUND GIRT BAR AT DOOR 1L NOT STOWED, INSPECTED DOOR 1L ESCAPE SLIDE FOUND TO BE OK NOT LOOSE. SUSPECT GIRT BAR WAS NOT STOWED PROPERLY. STOWED GIRT BAR REF AMM 25-66-00 DOOR CLOSED OK.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · bulb · inoperativeDec 13, 2025

    EMERGENCY EXIT LIGHTS NOT ARM AND NR 2 TANK FWD LOW PRESS INDICATION LIGHTS HAVE ONE LIGHT BULB INOPERATIVE EACH. R & R LIGHT BULBS PER AMM33-18-00, OPS CHECKED GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · battery pack · dischargedSep 12, 2025

    ROW 29-34 IN SEAT EMERGENCY LIGHTS INOP T/S AND FOUND BATTERY DEAD DUE TO INOP CHARGER. REMOVED AND REPLACED BOTH BATTERY AND CHARGER IAW AMM 33-51-06/201. OPS CHECK GOOD. OK FOR CONTINUED SERVICE.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · battery · failedSep 11, 2025

    AFTER LAYOVER CREW FOUND EMERG EXIT LIGHT SWITCH NOT DISARMED. REPLACED AIRCRAFT BATTERY ON L/P 6240561 ALL EMERGENCY LIGHTS OPERATIONAL CHECK GOOD AFTER BATTERY REPLACEMENT IAW 33-51-00 .

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · battery pack · no testJul 29, 2025

    EMERGENCY LIGHT BATTERY PACK M1673 FAILED CAPACITY CHECK. EMERGENCY LIGHTING SYSTEM FUNCTIONAL CHECK (INTERIOR AND EXTERIOR). REMOVED AND REPLACED IAW AMM 33-51-06-960-805. OPS CHECK GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · battery pack · faultyJul 29, 2025

    EMERGENCY LIGHT BATTERY PACK M1672 FAILED CAPACITY CHECK.EMERGENCY LIGHTING SYSTEM FUNCTIONAL CHECK (INTERIOR AND EXTERIOR). REMOVED AND REPLACED BATTERY PACK IAW AMM 33-51-06-960-805. OPS CHECK GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.

Showing the 10 most recent of 105 reports.

Related aircraft

Show all 8 related aircraft
All 36 registered Boeing 737-724 aircraft

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 20, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 20, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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