Aircraft record

N177301999 Boeing 737-724

Registration validUnclaimedSource: FAA, updated Oct 19, 2026

Safety record in brief:No NTSB accidents or incidents since 198221 ADs may apply99 service difficulty reports

Registration: Valid; expires Jun 30, 2030
Based in: Chicago, IL; owner city / state
Engine: CFM56 SERIES · 2200 hp; Cfm Intl.
Owners: 1; since 2023
NTSB events: None; since 1982
ADs may apply: 21; confirm with A&P
Service reports: 99; since 1995

Registration

FAA Aircraft Registry · Oct 19, 2026

Registered owner: United Airlines INC
Owner type: Corporation
City, state: Chicago, IL
Certificate issued: Jun 16, 2023
Expires: Jun 30, 2030
Airworthiness: Standard · Transport
Airworthiness date: Aug 3, 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: 737-724
Year: 1999
Serial number: 28798
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: A13608

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

2023 – nowUnited Airlines INCChicago, IL · current
1945Pester Propeller SerivceMineola, NY · different airframe: 1937 Waco Zgc-7 S/N 4578

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.

AD	Subject	Effective	Applies to
2019-14-02	Hydraulic power	Aug 27, 2019	Airframe (737-724)
2002-20-07 R1	Boeing Model 737 Series Airplanes	Nov 12, 2002	Airframe (737-724)
2002-20-07	Boeing Model 737 Series Airplanes	Nov 12, 2002	Airframe (737-724)
2001-11-11	Boeing Model 737, 747, and 777 Series Airplanes	Jul 16, 2001	Airframe (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
2001-10-14	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Jun 8, 2001	Airframe (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

AD	Subject	Effective	Applies to
2001-08-24	Boeing Model 737 Series Airplanes	May 10, 2001	Airframe (737-724)
2000-22-02 R1	Boeing Model 737 Series Airplanes	Nov 13, 2000	Airframe (737-724)
2000-22-02	Boeing Model 737 Series Airplanes	Nov 13, 2000	Airframe (737-724)
2000-15-16	Boeing Model 737, 757, 767, and 777 Series Airplanes	Sep 12, 2000	Airframe (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.
99-11-05	Boeing Model 737 Series Airplanes	Jun 28, 1999	Airframe (737-724)
99-22-16	Boeing Model 737 Series Airplanes	Dec 7, 1999	Airframe (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 R1	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Dec 28, 1998	Airframe (737-724)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368 Revision 2, 757-27A0128, 767-27A0156, 777-27A0029 Revision 1
98-22-10	Boeing Model 737 Series Airplanes	Nov 12, 1998	Airframe (737-724)Serial numbers per Boeing Service Bulletin 737-53A1108, Revision 5, dated October 26, 1989
98-18-20	Boeing Model 727 and Model 737 Series Airplanes Equipped with J.C. Carter Company Fuel…	Oct 21, 1998	Airframe (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).
98-13-12	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Jul 6, 1998	Airframe (737-724)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368, 757-27A0128, 767-27A0156, and 777-27A0029, dated March 26, 1998
98-03-10	Boeing Model 737, 747, 757, and 767 Series Airplanes	Feb 19, 1998	Airframe (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.
97-22-07	Boeing Model 737 Series Airplanes	Nov 12, 1997	Airframe (737-724)Certain serial numbers: 737 292–2565. Only with: Limited to airplanes with line numbers 292 through 2565 inclusive.
97-18-06	Boeing Model 737 Series Airplanes	Nov 12, 1997	Airframe (737-724)
97-05-10	Boeing Model 737 Series Airplanes	Mar 19, 1997	Airframe (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.
97-04-01	Boeing Model 737 Series Airplanes	Mar 21, 1997	Airframe (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
95-23-10	Boeing Model 737 Series Airplanes	Dec 13, 1995	Airframe (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 (99)

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 · odorSep 10, 2026
FUMES THROUGHOUT AIRCRAFT. ACCOMPLISHED ENG RUN WITH AC PACKS WITH NO ODOR NOTICED THRU OUT CABIN. REF FIM 21-00-806 ITEM 4 AND AMM 71-00-00800-808.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Air conditioning and pressurization · acm · seizedAug 27, 2026
LEFT PACK TRIP OFF AFTER LDG, ACCOMPANIED BRIEFLY WITH A BURNING ODOR. DISSIPATED QUICKLY. TURNED ON LT PACK, NO INLET SUCTION FROM RAM AIR INLET, AND NO EXHAUST (HIGHLY STRONGLY SUSPECT LEFT ACM FAILURE ). NO DAMAGE TO BYPASS DOOR. PACK EXHAUST PATH CLEAR . R & R LEFT ACM IAW AMM…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Air conditioning and pressurization · a/c pack · failedAug 27, 2026
BURNING ODOR BRIEFLY ENCOUNTERED ON CLIMB, AFTER TURNING RT BLEED ON PER BLD OFF TAKEOFF. LT PACK FAILURE AND OVERHEATING, RAN ENGINE 1 AND 2. NO ODORS DETECTED AT THIS TIME.
From FAA Service Difficulty Reports; matched by N-number and serial number.

Show all 10 reports

Fuselage · support beam · damagedJun 12, 2026
SUPPORT BEAM IS DAMAGED ON LOWER FLANGE FROM HP DOOR 192DR LATCH.DAMAGE IS BEYOND ALLOWABLE LIMITS, WILL NEED SRM REPAIR. MAJOR REPAIR. COMPLIED WITH STEPS 4 A-E FOR REPAIR SRM 57-10-13-2R-3. REQUST HFEC SURFACE SCAN FOR DAMAGE CUTOUT AND HOLE PROBE FOR 4 NUTPLATE HOLES REF STEPS 4F AND 4G.…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Lights · battery pack · no testJun 10, 2026
EMERGENCY LIGHT BATTERY PACK M1668 FAILS CAPACITY CHECK.POWER SUPPLY BATTERY PACK CAPACITY CHECK POWER SUPPLY, REMOVED AND REPLACED BATTERY PACK IAW 33-51-06-960-805 OPS CHKD GOOD.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Lights · battery pack · no testJun 10, 2026
EMERGENCY LIGHT BATTERY PACK M1672 FAILS CAPACITY CHECK.POWER SUPPLY. REPLACED #M1672 EMERGENCY LIGHT BATTERY, OPS CHKD GOOD IAW MM 33-51-06-960-805.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Lights · battery pack · no testJun 10, 2026
EMERGENCY LIGHT BATTERY PACK M1675 FAILS CAPACITY CHECK.POWER SUPPLY. REMOVED AND REPLACED BATTERY PACK IAW 33-51-06-960-805 OPS CHKD GOOD
From FAA Service Difficulty Reports; matched by N-number and serial number.
Lights · light · no discrepancyNov 15, 2025
SELECT EMERGENCY LIGHTS ARE ON WHILE SWITCH IN ARMED POSITION. ACCOMPLISHED EMERGENCY LIGHTS OPS TEST IAW AMM 33-51-00-720-801. OPS TESTED GOOD, ACFT GOOD TO CONTINUE.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Equipment and furnishings · girt bar · unpackedOct 14, 2025
R1 DOOR GIRT BAR EXCESS MATERIAL. REMOVED SLIDE, RESECURED GIRT MATERIAL (Z-FOLD) AND REINSTALLED R1 DOOR SLIDE IAW AMM 25-66-01-400-803. NO DEFECTS NOTED. INSPECTION OF R1 SLIDE ASSY. INSTALLATION, IAW GMM 09-25-05, AND AMM 25-66-01.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Equipment and furnishings · slide · out of positionSep 9, 2025
DOOR 2R EXCESS SLIDE MATERIAL STICKING OUT FOUND SLIDE MATERIAL AT DOOR 1R NOT 2R AS REPORTED SLIGHTLY RUBBING, REPOSITIONED. MATERIAL NOW IN PROPER POSITION.DOOR OPENS/CLOSES W/O RUBBING
From FAA Service Difficulty Reports; matched by N-number and serial number.

Showing the 10 most recent of 99 reports.

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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