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Aircraft record

N520AU1988 Boeing 737-3B7

DeregisteredUnclaimedSource: FAA, updated Oct 20, 2026

This N-number isn't registered right now. Below is its last known registration, canceled Nov 30, 2007.

Safety record in brief:No NTSB accidents or incidents since 198221 ADs may apply83 service difficulty reports

Registration
Deregistered
Last based in
Salt Lake City, UT
owner city / state
Engine
CFM56 SERIES · 2200 hp
Cfm Intl.
Owners
1
since 2007
NTSB events
None
since 1982
ADs may apply
21
confirm with A&P
Service reports
83
since 1995

Registration

FAA Aircraft Registry · Oct 20, 2026
Last registered owner
Wells Fargo Bank Northwest NA Trustee
Owner type
Corporation
City, state
Salt Lake City, UT
Certificate issued
Jul 6, 2007
Canceled
Nov 30, 2007
Airworthiness
Standard · Transport
Airworthiness date
Feb 1, 1988

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
737-3B7
Year
1988
Serial number
23706
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
A68901

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. 2007Wells Fargo Bank Northwest NA TrusteeSalt Lake City, UT

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.

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 (737-3B7)
2002-20-07 R1Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-3B7)
2002-20-07Boeing Model 737 Series AirplanesNov 12, 2002Airframe (737-3B7)
2001-11-11Boeing Model 737, 747, and 777 Series AirplanesJul 16, 2001Airframe (737-3B7)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 (737-3B7)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 (737-3B7)
2000-22-02 R1Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-3B7)
2000-22-02Boeing Model 737 Series AirplanesNov 13, 2000Airframe (737-3B7)
2000-15-16Boeing Model 737, 757, 767, and 777 Series AirplanesSep 12, 2000Airframe (737-3B7)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 (737-3B7)
99-22-16Boeing Model 737 Series AirplanesDec 7, 1999Airframe (737-3B7)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 (737-3B7)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 (737-3B7)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 (737-3B7)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 (737-3B7)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 (737-3B7)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 (737-3B7)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 (737-3B7)
97-05-10Boeing Model 737 Series AirplanesMar 19, 1997Airframe (737-3B7)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 (737-3B7)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 (737-3B7)

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

Service Difficulty Reports (83)

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.

  • Fuselage · angle · crackedSep 13, 2006

    FOUND ANGLE CRACKED, STA 294 STR 12L. REMOVED DAMAGED PARTS AND INSTALLED FABRICATED PARTS IAW 65-17664 , DEFECT SIZE: 1".

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Landing gear · warning light · false indicationAug 29, 2005

    CLT - UPON LOWERING LANDING GEAR, CREW RECEIVED A GEAR INDICATION OF 3 GREEN AND 3 RED. CREW ACCOMPLISHED A GO-AROUND, CYCLED THE GEAR AND RECEIVED A NORMAL GEAR INDICATION OF 3 GREEN. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE JACKED AIRCRAFT AND TROUBLESHOT SYSTEM. PERFORMED LANDING…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Lights · charger · inoperativeAug 23, 2005

    MAINTENANCE REPORTED THE BATTERY CHARGER FOR THE AFT ENTRY DOOR EMERGENCY EXIT SIGN WAS INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY CHARGER ASSEMBLY. OPS CHECK GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 10 reports
  • Lights · battery pack · dischargedJul 21, 2005

    PVD MAINTENANCE REPORTED THE EMERGENCY EXIT LIGHT OVER THE AFT LEFT ENTRY DOOR INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK. OPERATIONAL CHECK GOOD.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · stringer · crackedFeb 18, 2005

    PIT - FOUND STRINGER CRACKED 3 INCHES, BS 1138 S5A LEFT. TRIM OUT DAMAGE AND SPLICE IN NEW SECTION OF STRINGER PER TYPICAL REPAIR 53-80-04. (M)

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · skin · chafedFeb 18, 2005

    PIT - FOUND SKIN CHAFED .013 INCH BY .011 INCH DEEP BY 20 INCHES LONG, BS 867-887 LT/RT SIDE OF SKIN UNDER DORSAL FIN. CUT AREA OUT, INSTALLED FILLER, DOUBLER AND TRIPLER AND CHAFED STRAPS PER SRM 53-60-01 FIG 201 PAGE 241. (M)

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Wings · support angle · crackedFeb 17, 2005

    PIT - FOUND SUPPORT ANGLE CRACKED 1 INCH, TRAILING EDGE OF SUPPORT PANEL, RT WING JUST ABOVE INBOARD EDGE OF NR 5 FLAP. FABRICATED AND INSTALLED NEW SUPPORT ANGLE PER BOEING DWG 69-47542 AND SRM 57-51-02. (M)

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · channel · crackedFeb 16, 2005

    PIT - FOUND U-CHANNEL WITH 1 INCH CRACK, BS 747-767. FABRICATED AND INSTALLED NEW U-CHANNEL SUPPORT. (M)

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · floor support · corrodedFeb 16, 2005

    PIT - FOUND FLOOR SUPPORT CORRODED 1 INCH BY 1 INCH AREA, FLOOR SUPPORT BEAM S-26R BS 787-867. CORROSION LEVEL 1, TASK C53-208-01. REMOVED AND REPLACED FLOOR SUPPORT BEAM WITH FABRICATED BEAM PER SRM 51-40-02. (M)

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuselage · skin · crackedFeb 13, 2005

    PIT - FOUND SKIN CRACKED 1.5 INCH, FORWARD SERVICE DOOR CUTOUT AFT LOWER CORNER. INSTALLED DOUBLER PER SRM 53-10-01. (M)

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

Showing the 10 most recent of 83 reports.

Related aircraft

Show all 8 related 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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