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Aircraft record

N172451999 Boeing 737-824

Registration validUnclaimedSource: FAA, updated Oct 19, 2026

Safety record in brief:No NTSB accidents or incidents since 198221 ADs may apply106 service difficulty reports

Registration
Valid
expires Oct 31, 2029
Based in
Chicago, IL
owner city / state
Engine
CFM56 SERIES · 2200 hp
Cfm Intl.
Owners
1
since 2019
NTSB events
None
since 1982
ADs may apply
21
confirm with A&P
Service reports
106
since 1995

Registration

FAA Aircraft Registry · Oct 19, 2026
Registered owner
United Airlines INC
Owner type
Corporation
City, state
Chicago, IL
Certificate issued
Oct 16, 2019
Expires
Oct 31, 2029
Airworthiness
Standard · Transport
Airworthiness date
Nov 4, 1999

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
737-824
Year
1999
Serial number
28955
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
A1239D

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. 2019 – nowUnited Airlines INCChicago, IL · current
  2. until 1988Individual ownerdifferent airframe: Ballard B-8m S/N 1

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 19, 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 (737-824)
2002-20-07 R1Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-824)
2002-20-07Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-824)
2001-11-11Boeing Model 737, 747, and 777 Series AirplanesJul 16, 2001Airframe (737-824)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 (737-824)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 (737-824)
2000-22-02 R1Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-824)
2000-22-02Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-824)
2000-15-16Boeing Model 737, 757, 767, and 777 Series AirplanesSep 12, 2000Airframe (737-824)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 (737-824)
99-22-16Boeing Model 737 Series AirplanesDec 7, 1999Airframe (737-824)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 (737-824)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 (737-824)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 (737-824)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 (737-824)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 (737-824)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 (737-824)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 (737-824)
97-05-10Boeing Model 737 Series AirplanesMar 19, 1997Airframe (737-824)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 (737-824)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 (737-824)

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

Service Difficulty Reports (106)

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 · unknown · odorOct 10, 2026

    HOT DIRTY SOCK ODOR ON T/O PWR SET. GOT STRONGER ON INITIAL C LIMB. DISSAPATED AFTER DEBRIEFED CREW AND THEY STATED THAT THE ODOR DISSAPEARED AFTER REACHING 800 FEET. COMPRESSOR WAS PERFORMED THE PREVIOUS NIGHT, PER FIM 21-00 TASK 806 STEP A.(4), ODORS IN THE CABIN AFTER AN ENGINE HAS BEEN…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Doors · skin · dentedJun 28, 2026

    L1 DOOR EXTERNAL SKIN AFT SIDE LOWER SURFACE HAS A DENT ON SKIN EDGE. REPAIRED DENT LOCATED AT LOWER AFT CORNER OF THE L1 DOOR EXTERNAL SKIN IAW EC/RA 5210-03547 AND ESR-WI NR: 2024419-18-15361.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · angle · crackedJun 27, 2026

    KEELBEAM ANGLE CRACKED JUST BEHIND RT WHEEL WELL CUTOUT INTERNAL SIDE. REMOVED AND REPLACED KEELBEAM ANGLE JUST BEHIND RT WHEEL WELL CUTOUT INTERNAL SIDE . REPAIR ACCOMPLISHED IN REF SRM 51-40-02-0G-0. AND DWG 149A7692.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 10 reports
  • Fuselage · deck plate · dentedJun 25, 2026

    FOUND LARGE DENT AT FLIGHT DECK FLOOR WEB LBL 15, BS 259. REPAIRED DENT AT FLIGHT DECK FLOOR WEB LBL 15, BS 259, IAW SRM 53-10-51-2R-2.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · stringer · corrodedJun 11, 2026

    FOUND CORROSION AT E AND E COMPARTMENT INTERNAL S-27L, BS 344 - 380. REPAIRED STRINGER 27L FROM STA 344 TO STA 368 IAW AAR-MIA ESR-WI 2024419-12-15287 AND EC/RA 5310-08935. PERFORM AN INSPECTION OF STRINGER 27L REPAIR BETWEEN BS 344 & 368 IAW PART 2 OF THE LATEST REVISION OF ECRA 5310-08935. I

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Exhaust · skin · corrodedJun 10, 2026

    RIGHT ENGINE THRUST REVERSER INBOARD HALF INNER FAN DUCT WALL AFT SKIN HAS SURFACE CORROSION. REMOVED CORROSION AT RIGHT ENG THRUST REVERSER INBOARD HALF INNER FAN DUCT WALL AFT SKIN IN REF SRM 51-10-02-0G-0. ORIGINAL THICKNESS 0.071" MIN THICKNESS NOTED: 0.053, REMOVED MATERIAL: 0.018" FOUND OUT…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Stabilizers · rib · crackedJun 9, 2026

    R/H HORIZONTAL STAB RIB #2 STIFFENER #1 CRACK. REPAIRED RIB#2 STIFFENER #1 AT RIGHT HORIZONTAL STAB AS PER SRM 55-10-09-2R-4.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · door sill · crackedJun 7, 2026

    FOUND CRACK FWD MAIN CABIN WET AREA L-1 DOOR LOWER SILL INNER CHORD LBL 60 STA 303.9. REMOVED AND REPLACED L1 DOOR INNERCHORD AS PER SRM 51-40-02-0G-0 AND DRAWING 141A8110 SHEET 8,

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · threshold · corrodedJun 5, 2026

    R-2 DOOR THRESHOLD INNER CORD IS CORRODED IN SEVERAL PLACES. REMOVED AND REPLACED R2 INNER CHORD AS PER SRM 51-40-02-0G-0 AND DRAWING 147A8501 SHEET 69 AND 70.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · splice angle · corrodedJun 5, 2026

    FOUND CORROSION AT E AND E COMPARTMENT INTERNAL S-28L STA 360 MKD DOT 135.REF AAR NR 100033385. REMOVED AND REPLACED PRODUCTION SPLICE( P/N 141A8513-50), AND SPLICE ANGLE (P/N 141A8513-48) AS PER DRAWINGS 140A9101 SHEET 9 AND SHEET 12 AND SRM 51-40-02-0G-0. ESFR ENTRY REQUIRED. REMOVED AND…

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

Showing the 10 most recent of 106 reports.

Related aircraft

Show all 8 related aircraft
All 135 registered Boeing 737-824 aircraft

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 19, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 19, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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