# N520AU: 1988 Boeing 737-3B7, registration cancelled 2007-11-30 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: November 30, 2007 - Exported to: New Zealand - Status when cancelled: Valid registration - Airframe: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (registry code 138447F) - Engine: [CFM International CFM56 series](https://openairdocs.org/engine/cfm-international-cfm56-series) (registry code 13802) - Serial number: 23706 - Year built: 1988 - Type of aircraft: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: February 1, 1988 - Certificate issued: July 6, 2007 - Last registry action: July 6, 2007 - Mode S code: A68901 - Owner when cancelled: [Wells Fargo Bank Northwest Na Trustee](https://openairdocs.org/faa-owner/WELLS%20FARGO%20BANK%20NORTHWEST%20NA%20TRUSTEE) - Location: [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City) - Owner type: Corporation - Owner's area on the map: 40.7558° N, 111.8843° W: Placed by OpenAirDocs at the center of ZIP code 84111, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N520AU - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=520AU - Page: https://openairdocs.org/deregistered/N520AU-2007-11-30 From the FAA registry file of November 3, 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 737-3B7: https://openairdocs.org/model/boeing-737-3b7.md ## Service difficulty reports (83, newest 50) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR USAA061166](https://openairdocs.org/sdr/USAA061166), Sep 13, 2006: ANGLE. CRACKED. FOUND ANGLE CRACKED, STA 294 STR 12L. REMOVED DAMAGED PARTS AND INSTALLED FABRICATED PARTS IAW 65-17664 , DEFECT SIZE: 1". - [SDR SB05101](https://openairdocs.org/sdr/SB05101), Aug 29, 2005: WARNING LIGHT. FALSE INDICATION. 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 GEA - [SDR SB05097](https://openairdocs.org/sdr/SB05097), Aug 23, 2005: CHARGER. INOPERATIVE. MAINTENANCE REPORTED THE BATTERY CHARGER FOR THE AFT ENTRY DOOR EMERGENCY EXIT SIGN WAS INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY CHARGER ASSEMB - [SDR SB05083](https://openairdocs.org/sdr/SB05083), Jul 21, 2005: BATTERY PACK. DISCHARGED. PVD MAINTENANCE REPORTED THE EMERGENCY EXIT LIGHT OVER THE AFT LEFT ENTRY DOOR INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK. OPERATIONAL CHECK - [SDR USAA050309](https://openairdocs.org/sdr/USAA050309), Feb 18, 2005: SKIN. CHAFED. 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 A - [SDR USAA050295](https://openairdocs.org/sdr/USAA050295), Feb 18, 2005: STRINGER. CRACKED. 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) - [SDR USAA050310](https://openairdocs.org/sdr/USAA050310), Feb 17, 2005: SUPPORT ANGLE. CRACKED. 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 ANG - [SDR USAA050314](https://openairdocs.org/sdr/USAA050314), Feb 16, 2005: FLOOR SUPPORT. CORRODED. 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 SU - [SDR USAA050311](https://openairdocs.org/sdr/USAA050311), Feb 16, 2005: CHANNEL. CRACKED. PIT - FOUND U-CHANNEL WITH 1 INCH CRACK, BS 747-767. FABRICATED AND INSTALLED NEW U-CHANNEL SUPPORT. (M) - [SDR USAA050296](https://openairdocs.org/sdr/USAA050296), Feb 13, 2005: SKIN. CRACKED. PIT - FOUND SKIN CRACKED 1.5 INCH, FORWARD SERVICE DOOR CUTOUT AFT LOWER CORNER. INSTALLED DOUBLER PER SRM 53-10-01. (M) - [SDR USAA050297](https://openairdocs.org/sdr/USAA050297), Feb 13, 2005: SUPPORT ANGLE. CORRODED. PIT - FOUND SUPPORT ANGLE CORRODED APPROX 24 INCHES, FORWARD SERVICE DOOR FLOOR THRESHOLD SUPPORT ANGLE. REPLACED SUPPORT PER SRM 53-10-15. (M) - [SDR USAA050316](https://openairdocs.org/sdr/USAA050316), Feb 11, 2005: SKIN. DELAMINATED. PIT - FOUND EXT COMPOSITE SURFACE DELAMINATED 4 INCHES LONG BY .0625 INCHE WIDE SINGLE LAYER DAMAGE, RUDDER LEFT SIDE 38 INCHES FROM BOTTOM, 13.5 INCHES FROM T/ - [SDR USAA050315](https://openairdocs.org/sdr/USAA050315), Feb 11, 2005: SKIN PANEL. DELAMINATED. PIT - FOUND COMPOSITE SKIN PANEL DELAMINATED .5 INCH BY .0625 INCH SINGLE LAYER DAMAGE, LT SIDE RUDDER 57 INCHES FROM BOTTOM, 34 INCHES FROM T/E. INSTALLED REPA - [SDR USAA050317](https://openairdocs.org/sdr/USAA050317), Feb 11, 2005: SKIN. DELAMINATED. FOUND EXT COMPOSITE SURF DELAMINATED .5 INCH LONG BY .0625 INCH WIDE SINGLE LAYER DAMAGE, RUDDER LEFT SIDE 66 INCHES FROM BOTTOM, 14 INCHES FROM T/E. REMOVED DA - [SDR USAA050320](https://openairdocs.org/sdr/USAA050320), Feb 11, 2005: SKIN. DELAMINATED. PIT - FOUND EXT COMPOSITE SURF WITH 1 INCH SINGLE LAYER DAMAGE DELAMINATION, RUDDER RT SIDE 41 INCHES FROM BOTTOM, 8 INCH FROM T/E. INSTALLED REPAIR PLYS, SEALE - [SDR USAA050321](https://openairdocs.org/sdr/USAA050321), Feb 11, 2005: SKIN. DELAMINATED. PIT - FOUND EXIT COMPOSITE SURF, 2 INCHES LONG BY .125 INCH WIDE SINGLE LAYER DAMAGE, RUDDER RT SIDE 57 INCH FROM BOTTOM, 10 INCH FROM T/E. INSTALLED REPAIR PLY - [SDR USAA050322](https://openairdocs.org/sdr/USAA050322), Feb 11, 2005: SKIN. DELAMINATED. PIT - FOUND EXT COMPOSITE SURF 4 INCH LONG BY .125 INCH SINGLE LAYER DAMAGE, RUDDER RT SIDE 64 INCHES FROM BOTTOM 34 INCHES FROM T/E. INSTALLED REPAIR PLYS, SEA - [SDR USAA050323](https://openairdocs.org/sdr/USAA050323), Feb 11, 2005: SKIN. DELAMINATED. PIT - FOUND EXT COMPOSITE SURF WITH DELAMINATION 5 INCHES LONG BY .125 INCH WIDE SINGLE LAYER DAMAGE, RUDDER RT IDE 114 INCH FROM BOTTOM 7 INCH FROM T/E. INSTAL - [SDR USAA050313](https://openairdocs.org/sdr/USAA050313), Feb 11, 2005: ATTACH FITTING. CORRODED. PIT - FOUND ATTACH RING CORRODED 1 INCH BY 20 INCH AREA, ACCESS PANEL NR 7405. DEFECTIVE PART REPLACED WITH IDENT PART PER AMM 57-00-00. (M) - [SDR USAA050318](https://openairdocs.org/sdr/USAA050318), Feb 11, 2005: SKIN PANEL. DELAMINATED. PIT - FOUND COMPOSITE SKIN PANEL DELAMINATED .1875 INCH DIAMETER SINGER LAYER DAMAGE, RUDDER LT SIDE 70 INCHES FROM BOTTOM, 9 INCHES FROM T/E. INSTALLED REPAIR - [SDR USAA050319](https://openairdocs.org/sdr/USAA050319), Feb 11, 2005: SKIN PANEL. DELAMINATED. PIT - FOUND COMPOSITE SKIN PANEL WITH DELAMINATION 3 INCH BY .0625 INCH SINGLE LAYER DAMAGE, 165 INCHES FROM BOTTOM, 13 INCHES FROM T/E RUDDER LT SIDE. INSTALLE - [SDR USAA050298](https://openairdocs.org/sdr/USAA050298), Feb 11, 2005: SKIN. CHAFED. PIT - FOUND RIGHT OUTBOARD MID FLAP CHAFED .25 INCH BY 2 INCH BY .016 INCH, OUTBOARD 4 EDGE SURFACE. DOUBLER INSTALLED PER SRM 57-53-01 FIG 208. (M) - [SDR USAA050235](https://openairdocs.org/sdr/USAA050235), Feb 11, 2005: WEB. CORRODED. PIT - FOUND WEB CORRODED 8 INCH BY 30 INCH AREA, BS 794-828, CORROSION LEVEL 1, TASK NR C53-202-01. DEFECTIVE PART REPLACED WITH IDENT PART NR PER SRM 51-40-00. - [SDR USAA050233](https://openairdocs.org/sdr/USAA050233), Feb 10, 2005: WEB. TORN. PIT - FOUND WEB WITH .5 INCH SQUARE SECTION TORN OUT, BS 847 AT S24R. CUT OUT DAMAGE AND INSTALLED DOUBLER SPLICE AND NEW WEB PER SRM 51-70-13. (M) - [SDR USAA050232](https://openairdocs.org/sdr/USAA050232), Feb 10, 2005: FRAME. CRACKED. PIT - FOUND FRAME CRACKED .25, BS 440 BETWEEN S8R AND S9R. CUT OUT DAMAGE AND INSTALLED REPAIR ANGLES PER TYPICAL REPAIR 53-10-20A. (M) - [SDR USAA050312](https://openairdocs.org/sdr/USAA050312), Feb 9, 2005: HINGE BRACKET. WORN. PIT - FOUND HINGE PLATES WITH THREE WORN HOLES .25 INCH DIAMETER, RUDDER HINGE NR 7 PLATES ON VERTICAL STABILIZER. DEFECTIVE PART REPLACED WITH IDENT PART PER A - [SDR USAA050300](https://openairdocs.org/sdr/USAA050300), Feb 9, 2005: SKIN. DENTED. PIT - FOUND SKIN DENTED AND PUNCTURED, 1 INCH BY 1 INCH BY .125 INCH, BETWEEN S-26R AND S27R AND STA 500D PLUS 10 INCHES. REPAIR DOUBLER INSTALLED PER SRM 53-00 - [SDR USAA050234](https://openairdocs.org/sdr/USAA050234), Feb 9, 2005: ANGLE. CHAFED. PIT - FOUND SKATE ANGLE CHAFED, VERT STAB RT AND LT LOWER SKATE ANGLE. DEFECTIVE PART REPLACED WITH IDENT PART PER SRM 51-40-00 AND DWG 65-54842. (M) - [SDR USAA050231](https://openairdocs.org/sdr/USAA050231), Feb 9, 2005: FRAME. CRACKED. PIT - FOUND FRAME CRACKED .25 INCH, FS 887 S-9R. DOUBLER REPAIR INSTALLED PER 53-10-20A. (M) - [SDR USAA050236](https://openairdocs.org/sdr/USAA050236), Feb 9, 2005: STRINGER SPLICE. CRACKED. PIT - FOUND STRINGER SPLICE CRACKED 1 INCH IN TWO LOCATIONS, BS 908 S4L AND S4R. REMOVED TWO SPLICES, MANUFACTURED NEW AND INSTALLED PER SRM 51-40-02 AND DWG NR - [SDR USAA050299](https://openairdocs.org/sdr/USAA050299), Feb 8, 2005: SKIN. CRACKED. PIT - FOUND NR 5 SLAT SKIN CRACKED 1 INCH, OUTBOARD FORWARD EDGE ABOVE UPSTOP. INSTALLED DOUBLER PER SRM 57-43-01. (M) - [SDR USAA050230](https://openairdocs.org/sdr/USAA050230), Feb 7, 2005: FRAME. CRACKED. PIT - FOUND FRAME CRACKED .75 INCH, FS 616 S17R. INSTALLED DOUBLER PER TYPICAL REPAIR 53-62-01. (M) - [SDR USAA050227](https://openairdocs.org/sdr/USAA050227), Feb 4, 2005: FRAME. CRACKED. PIT - FOUND FRAME CRACKED .125 INCH, BETWEEN 4TH DOOR STOP FORWARD SIDE. INSTALLED DOUBLER PER TYPICAL REPAIR 52-10-11. (M) - [SDR USAA050228](https://openairdocs.org/sdr/USAA050228), Feb 4, 2005: DOOR FRAME. CRACKED. PIT - FOUND FRAME CRACKED .125 INCH, FRAME FORWARD SIDE NR 3 DOOR STOP CUTOUT. INSTALLED DOUBLER PER TYPICAL REPAIR 52-10-11. (M) - [SDR USAA050229](https://openairdocs.org/sdr/USAA050229), Feb 3, 2005: DOOR FRAME. CRACKED. PIT - FOUND FORWARD ENTRY DOOR CRACKED .3750, FRAME AND INNER WEB AT STOPS NR 5 AND NR 6 CUTOUTS. REMOVED DAMAGE, INSTALLED DOUBLER PER TYPICAL REPAIR 51-10-16. - [SDR USAA040522](https://openairdocs.org/sdr/USAA040522), Sep 1, 2004: SKIN. CRACKED. PIT - FOUND SKIN CRACKED 1.125 INCH LONG, STATION 727D PLUS 18 INCHES STRINGER 22L FUSELAGE SKIN. INSTALLED DOUBLER AND TRIPLER PER SRM 53-00-01 FIG 229. (M) - [SDR USAA040051](https://openairdocs.org/sdr/USAA040051), Feb 25, 2004: SKIN. CRACKED. CLT - FOUND SKIN WITH 3 CRACKS, 2 INCHES, 2.5 INCHES AND .5 INCHES, BS 727D S23R-S24R. INSTALLED DOUBLER PER SRM 53-00-01 FIG 229. (M) - [SDR USAASB03190](https://openairdocs.org/sdr/USAASB03190), Oct 17, 2003: CHARGER. INOPERATIVE. FOUND L1 DOOR EMERGENCY EXIT SIGN INOPERATIVE. MAINTENANCE REPLACED THE BATTERY AND CHARGER. (M) - [SDR USAASB03185](https://openairdocs.org/sdr/USAASB03185), Oct 17, 2003: CHARGER. FAILED. MAINTENANCE REPORTED THE AFT LEFT ENTRY DOOR EMERGENCY EXIT SIGN DOES NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE CHARGER ASSEMBLY AND THE BATTERY PACK - [SDR USAASB03186](https://openairdocs.org/sdr/USAASB03186), Oct 17, 2003: BATTERY PACK. INOPERATIVE. MAINTENANCE REPORTED THE FORWARD ENTRY DOOR EMERGENCY EXIT SIGN WILL NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK. OPS CHECK GOOD. (M) - [SDR USAASB03191](https://openairdocs.org/sdr/USAASB03191), Oct 17, 2003: BATTERY. INOPERATIVE. FOUND L2 DOOR EMERGENCY EXIT SIGN INOPERATIVE. MAINTENANCE REPLACE THE BATTERY. (M) - [SDR USAASA03168](https://openairdocs.org/sdr/USAASA03168), Sep 16, 2003: SOCKET. INOPERATIVE. MAINTENANCE REPORTED THE EMERGENCY EXIT ILGHT AT SEAT ROW 4, RIGHT SIDE, INOPERATIVE. MAINTENANCE REPLACED THE LIGHT SOCKET. (M) - [SDR USAA030180](https://openairdocs.org/sdr/USAA030180), Sep 2, 2003: ANGLE. CRACKED. FOUND SEAL ANGLE CRACKED 10.5 INCHES, LEFT GEARWELL, TIRE O/D AT FILLET FAIRING. DEFECTIVE PART REPLACED WITH IDENT PART NR PER SRM 51-10-02. (M) - [SDR USAASB03133](https://openairdocs.org/sdr/USAASB03133), Aug 8, 2003: CONTROL MODULE. FAULTY. ORF - FLT 636 - EN ROUTE FROM CLT-PVD, AT FL330, THE NR 1 ENGINE OVERHEAT LIGHT ILLUMINATED. CREW REDUCED THE NR 1 ENGINE THROTTLE TO IDLE AND THE LIGHT EXTINGU - [SDR USAASB01254](https://openairdocs.org/sdr/USAASB01254), Sep 12, 2001: BATTERY PACK. DISCHARGED. LGA - MAINTENANCE FOUND THE RIGHT OVERWING EMERGENCY LIGHT INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE RIGHT OVERWING EMERGENCY LIGHT BATTERY PACK. OPERAT - [SDR USAA010801](https://openairdocs.org/sdr/USAA010801), Jul 3, 2001: SKIN. CRACKED. PIT - FOUND SKIN CRACKED 1.125 INCH, RIGHT SIDE STATION 727E STRINGER 24 RIGHT. CUT OUT DAMAGE, INSTALLED EXT DOUBLER PER SRM 53-00-01 FIG 201. (M) - [SDR USAASB01090](https://openairdocs.org/sdr/USAASB01090), Mar 27, 2001: DOOR. NOT CLOSED. PWM - FLT 2271 - ON CLIMB-OUT FROM PWM, THE A/C WOULD NOT PRESSURIZE. CREW ASSUMED IT WAS A MALFUNCTION OF THE PRESSURIZATION SYSTEM SINCE THERE WAS NO DOOR WAR - [SDR USAASB01074](https://openairdocs.org/sdr/USAASB01074), Mar 6, 2001: DOOR. NOT CLOSED. IAH - FLT 744 - ON CLIMB-OUT FROM IAH, CAPTAIN REPORTED THEY COULD NOT GET THE CABIN TO PRESSURIZE. AT 8,000 FEET, FLIGHT ATTENDANT ADVISED CAPTAIN THAT THE AFT - [SDR USAASB01056](https://openairdocs.org/sdr/USAASB01056), Feb 24, 2001: DOOR. NOT CLOSED. PWM - FLT 1433 - ON CLIMB-OUT FROM PWM, EN ROUTE TO PIT, THE AIRCRAFT WOULD NOT PRESSURIZE. AT 5,000 FEET, THE CREW LEVELED OFF AND TRIED TO PRESSURIZE. AIRCRAF - [SDR USAA010111](https://openairdocs.org/sdr/USAA010111), Feb 5, 2001: FLOORBEAM. CORRODED. CLT - FOUND T-CAP CORRODED 70 INCHES, RBL 46 TO LBL 48. REPLACED T-CAP PER SRM 53-10-51. (M) All 83: https://openairdocs.org/deregistered/N520AU-2007-11-30/reports.md ## FAA accident and incident reports (1) 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 19960119002799I](https://openairdocs.org/incident/19960119002799I), Jan 19, 1996: Boeing 737300 (N520AU), Pittsburgh, PA. Narrative: while in cruise flight at 37,000 ft., cabin began to climb at 2000 ft/min. Pilots noted that l. duct pressure was 42 PSI on l. engine EGT was 754… --- 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.