# N504AU: 1987 Boeing 737-3B7, registration cancelled 2010-10-06 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: October 6, 2010 - Status when cancelled: Triennial form not returned - Airframe: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (registry code 138447F) - Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000) - Serial number: 23379 - Year built: 1987 - Type of aircraft: Fixed wing multi engine - Engine type: None - Airworthiness: Standard, transport - Airworthiness date: March 26, 1987 - Certificate issued: June 28, 2006 - Last registry action: July 21, 2009 - Mode S code: A648DF - Owner when cancelled: [Aircraft Statutory Trust N504au](https://openairdocs.org/faa-owner/AIRCRAFT%20STATUTORY%20TRUST%20N504AU) - Location: [Boston, MA](https://openairdocs.org/faa-place/MA/Boston) - Owner type: Corporation - Owner's area on the map: 42.3582° N, 71.0519° W: Placed by OpenAirDocs at the center of ZIP code 02110, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N504AU - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=504AU - Page: https://openairdocs.org/deregistered/N504AU-2010-10-06 From the FAA registry file of November 5, 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 (123, newest 50) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR USAA2010051290948](https://openairdocs.org/sdr/USAA2010051290948), May 10, 2010: SKIN. CRACKED. CLT - RON - MAJOR REPAIR - 3 CRACKS IN FUSELAGE SKIN LEFT SIDE ABOVE UPPER LAP SEAM AT BS 500C + 3 INCHES & +12 INCHES, S10L. ALSO AT BS 500B + 14 INCHES, S10L. - [SDR USAA20100416SB052](https://openairdocs.org/sdr/USAA20100416SB052), Apr 14, 2010: LIGHT. INOPERATIVE. CLT - THE OVERHEAD 5C INTERIOR EMERGENCY EXIT LIGHT WAS INOPERATIVE. MAINTENANCE REPLACED THE 5C INTERIOR EMERGENCY EXIT LIGHT. OPERATIONALLY CHECKS OK. - [SDR USAA20090909SB146](https://openairdocs.org/sdr/USAA20090909SB146), Sep 8, 2009: BATTERY PACK. DISCHARGED. CLT - MAINTENANCE REPORTED SEVERAL EMERGENCY EXIT LIGHTS IN THE MID CABIN AISLE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK AT ROW 123ABC CEI - [SDR USAA2009062491580](https://openairdocs.org/sdr/USAA2009062491580), Jun 18, 2009: SLIDING WINDOW. BINDING. CLT - C6 - EES - FIRST OFFICER'S SLIDING WINDOW STIFF TO OPERATE. EXTERNAL HANDLE WILL NOT OPEN WINDOW AND DOES NOT LIE FLUSH TO FUSELAGE. CLEANED AND LUBED FIR - [SDR USAA2009061991525](https://openairdocs.org/sdr/USAA2009061991525), Jun 16, 2009: SKIN. DELAMINATED. CLT - C6 - MAJOR REPAIR - DELAMINATION ON LEFT WING OUTBOARD AFT FLAP INBOARD LOWER SURFACE. REPLACED LEFT WING OUTBOARD AFT FLAP IAW B737 AMM 27-51-39. - [SDR USAA2009061791493](https://openairdocs.org/sdr/USAA2009061791493), Jun 16, 2009: SKIN. CRACKED. CLT - C6 - MAJOR REPAIR - CRACK IN FUSELAGE SKIN AT BS 767, S23R. REPAIRED FUSELAGE SKIN AT BS 767, S23R IAW B737 SRM 53-00-01 REPAIR 31. - [SDR USAA2009062391569](https://openairdocs.org/sdr/USAA2009062391569), Jun 15, 2009: SLIDE. MISROUTED. CLT - C6 - EES - AFT ENTRY DOOR SLIDE RELEASE CABLE IS NOT ROUTED PROPERLY. RE-ROUTED AFT ENTRY DOOR SLIDE RELEASE CABLE IAW B737 AMM 25-61-35. - [SDR USAA2009041390863](https://openairdocs.org/sdr/USAA2009041390863), Apr 11, 2009: SKIN. CRACKED. PIT - WALK AROUND - MAJOR REPAIR - DURING WALK AROUND, DISCOVERED 3 INCH CRACK IN FUSELAGE SKIN RIGHT SIDE AFT OF WING TO BODY FAIRING ROUGHLY 5 INCHES ABOVE EX - [SDR USAA920081638](https://openairdocs.org/sdr/USAA920081638), Sep 5, 2008: BULKHEAD. CRACKED. PIT FPBH MAJOR REPAIR LOG NR 4353301. 2 CRACKS ON 178 BULKHEAD AT RIVET FASTENERS AT WL234, RBL8, ON FORWARD SIDE. REPAIRED 178 BULKHEAD AT RIVET FASTENERS AT W - [SDR USAA920081637](https://openairdocs.org/sdr/USAA920081637), Sep 4, 2008: BULKHEAD. CRACKED. PIT FPBH MAJOR REPAIR EO NR 5300V152 & LOG NR 4352189. 5 INCH CRACK AFT OF BULKHEAD BS178 TO 182, WL226-234, RBL17. REPAIRED BULKHEAD BS178 TO 182, WL226-234, R - [SDR USAA920081301](https://openairdocs.org/sdr/USAA920081301), Jul 1, 2008: FLASHLIGHT. FAILED. CLT - FLT 923 - FWD FLT ATTENDANT LOWER FLASHLIGHT INOP. MX REPLACED FWD F/A FLASHLIGHT. OPERATIONAL TEST WAS GOOD. (S) - [SDR USAA920081271](https://openairdocs.org/sdr/USAA920081271), Jun 25, 2008: SKIN. CRACKED. CLT - C5 - MAJOR REPAIR - FUSELAGE SKIN CRACKED AT FORWARD ENTRY DOOR LOWER FORWARD HINGE CUTOUT BETWEEN BS 294-312, BETWEEN S12-14L. REPAIRED FUSELAGE SKIN AT - [SDR USAA920081270](https://openairdocs.org/sdr/USAA920081270), Jun 25, 2008: SKIN. CANNING. CLT - C5 - MAJOR REPAIR - FUSELAGE SKIN OIL CANNING AT BS 727E TO BS 740, S18-19R. REPAIRED FUSELAGE SKIN, BS 727E TO BS 740, S18-19R IAW B737 SRM 53-00-01 REPA - [SDR USAA920081269](https://openairdocs.org/sdr/USAA920081269), Jun 25, 2008: WEB. CRACKED. CLT - C-5 - MAJOR REPAIR - AFT CARGO DOOR LOWER WEB FWD END IS CRACKED APPROX 4TH FASTENER AFT AND ANGLE IS CRACKED AT 3 FASTENER LOCATIONS. REMOVED DEFECTIVE D - [SDR USAA920081249](https://openairdocs.org/sdr/USAA920081249), Jun 19, 2008: BATTERY PACK. DISCHARGED. FLT 1129 - CLT - EEL - AFT RT EMERGENCY LIGHT OVER AFT RT DOOR WILL NOT ILLUMINATE. MX REPLACED THE BATTERY PACK. OPERATIONAL CHECK WAS GOOD. (S) - [SDR USAA920080888](https://openairdocs.org/sdr/USAA920080888), Apr 16, 2008: STRINGER. CORRODED. CLT - MAJOR REPAIR - NR 4364480, CORROSION ON STR 27L AT BS 1007. INSTALLED NEW SECTION OF STRINGER IAW SRM 53-60-03. - [SDR USAA920080887](https://openairdocs.org/sdr/USAA920080887), Apr 16, 2008: STRINGER. CORRODED. CLT - MAJOR REPAIR-NR 4364480, CORROSION ON STR 26R AT BS 1007. INSTALLED NEW SECTION OF STRINGER IAW SRM 53-60-03. - [SDR USAA920080874](https://openairdocs.org/sdr/USAA920080874), Apr 12, 2008: SKIN. CRACKED. CLT - MAJOR REPAIR - A .5 INCH CRACK ON FUSELAGE SKIN AT BS 219, LBL 29 (PILOTS WINDOW B-POST AREA). INSTALLED DOUBLER REPAIR IAW SRM 53-10-01 REPAIR 10. - [SDR USAA920080869](https://openairdocs.org/sdr/USAA920080869), Apr 12, 2008: SKIN. CRACKED. A 1.25 INCH CRACK ON FUSELAGE SKIN AT BS 727D + 17" - 18", S23R. INSTALLED DOUBLER REPAIR IAW SRM 53-00-01 REPAIR 3 FIG 201. - [SDR USAA920080001](https://openairdocs.org/sdr/USAA920080001), Jan 1, 2008: SMOKE DETECTOR. FALSE ACTIVATION. BOS - FFW - FLT 854 - CARGO FIRE MX LIGHT ON MX TEST SHOWS FALSE ALARM. MX REPLACED THE CARGO SMOKE DETECTOR. OPERATIONAL CHECK WAS GOOD. - [SDR USAA920070807](https://openairdocs.org/sdr/USAA920070807), Sep 2, 2007: SKIN. CRACKED. CTL - MAJOR REPAIR - NR 4214778 - CRACKED FUSELAGE SKIN, BS 520, S10L. REPAIRED FUSELAGE SKIN, BS 520, S10L IAW B737-300 SRM 53-00-01 REPAIR 31. - [SDR USAA070522](https://openairdocs.org/sdr/USAA070522), Jul 11, 2007: SKIN. CRACKED. FWD OF STA 727E & 3 INCHES AFT OF EXISTING REPAIR DOUBLER AT S-24L HAS CRACK. FABRICATED DOUBLERS & INSTALLED PER SRM 53-00-01, DEFECT SIZE: 1.25 INCH. - [SDR USAA070524](https://openairdocs.org/sdr/USAA070524), Jul 11, 2007: WEB. CORRODED. FUSELAGE WEB AT DOOR SKIN, STA 847-867 AFT OF AFT CARGO DOOR HAS CORROSION. REMOVED DAMAGE & INSTALLED REPAIR PARTS PER EA 97955A, DEFECT SIZE: 20 INCHES. - [SDR SB07014](https://openairdocs.org/sdr/SB07014), Feb 21, 2007: BATTERY PACK. DISCHARGED. DCA - MAINTENANCE REPORTED THE EMERGENCY EXIT SIGNS AT THE FORWARD ENTRY DOOR AND FORWARD SERVICE DOOR INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE FORWARD - [SDR SB06096](https://openairdocs.org/sdr/SB06096), Oct 5, 2006: BATTERY PACK. DISCHARGED. MAINTENANCE REPORTED THE FIRST CLASS SEAT EMERGENCY LIGHTS DIM/INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE FORWARD EMERGENCY LIGHT BATTERY PACK. OPERATION - [SDR USAA061040](https://openairdocs.org/sdr/USAA061040), Aug 11, 2006: SKIN. CRACKED. BS 518 S12L CRACKED. INSTALLED TEAR STRAP, DOUBLER AND TRIPLER IAW EA 97864A, DEFECT SIZE: 3 INCHES. - [SDR USAA061041](https://openairdocs.org/sdr/USAA061041), Aug 11, 2006: FLOORBEAM. CRACKED. BS 663.75 BL 0 CRACKED. FABRICATED AND INSTALLED REPAIR ANGLES AND STRAPS IAW EA 97880, DEFECT SIZE: 2 INCHES. - [SDR USAA061042](https://openairdocs.org/sdr/USAA061042), Aug 11, 2006: FLOORBEAM. CRACKED. BS 663.75 BL 0 CRACKED. FABRICATED AND INSTALLED NEW WEB SECTION IAW EA 97880, DEFECT SIZE: 3 INCHES. - [SDR USAA061043](https://openairdocs.org/sdr/USAA061043), Aug 11, 2006: STRUCTURE. CORRODED. BS 270 LBL 11 TO RBL 11. INSTALLED REPAIR STRAP AND TAPERED SHIMS IAW EA 97957, DEFECT SIZE: 24 INCHES. - [SDR USAA061044](https://openairdocs.org/sdr/USAA061044), Aug 11, 2006: SILL. CORRODED. BS 847 TO 867 AFT CARGO DOOR SILL CORROSION. INSTALLED NEW WEB, REPAIR STRAP AND FILLERS IAW EA 97955 AND SRM 51-10-02, DEFECT SIZE: 7" X .600". - [SDR USAA061036](https://openairdocs.org/sdr/USAA061036), Aug 10, 2006: DOOR FRAME. CRACKED. FWD CARGO DOOR CUTOUT, AFT FRAME AT LOWER STOP PAD CRACKED. REMOVE DAMAGE, INSTALL FILLERS AND DOUBLERS IAW EA 97869, DEFECT SIZE: .275 INCH. - [SDR USAA061037](https://openairdocs.org/sdr/USAA061037), Aug 10, 2006: WEB. GOUGED. RIGHT STAB, O/B END PLATE CLOSEOUT WEB GOUGED. REMOVED DAMAGE, INSTALLED A BONDED REPAIR IAW EA 97913 DEFECT SIZE: 1.250 INCH. - [SDR USAA061030](https://openairdocs.org/sdr/USAA061030), Aug 9, 2006: DOOR FRAME. CRACKED. STA 440 LOWER DOOR STOP O/B CORNER CRACKED. CUT OUT DAMAGE, INSTALLED DOUBLER REPAIR IAW EA 97905, DEFECT SIZE: .5 INCH. - [SDR USAA061019](https://openairdocs.org/sdr/USAA061019), Aug 9, 2006: PANEL. CORRODED. AFT CARGO FWD DOOR FRAME, LWR CLOSE OUT PANEL CORROSION. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW DWG 65-47959 LEVEL 1 C53-202-01, DEFECT SIZE: 1 X 1 INCH. - [SDR USAA061024](https://openairdocs.org/sdr/USAA061024), Aug 9, 2006: ANGLE. CORRODED. BS 727C+4-827+8, ABOVE S-251 CORROSION. REMOVED DAMAGE AND INSTALLED FABRICATED PARTS IAW SRM 51-10-02 LEVEL 2 C53-208-01, DEFECT SIZE: 8 INCHES. - [SDR USAA061023](https://openairdocs.org/sdr/USAA061023), Aug 9, 2006: BULKHEAD. CORRODED. AT 10 INCHES AFT OF 727 BULKHEAD RBL 0 CORROSION. REMOVED DAMAGE AND INSTALLED FABRICATED PARTS IAW DRWG 200-1-013 LEVEL 2 C53-208-01, DEFECT SIZE: 6 INCHES. - [SDR USAA061022](https://openairdocs.org/sdr/USAA061022), Aug 9, 2006: ANGLE. WORN. RIGHT SKATE ANGLE AT VERT FIN HAS WEAR. INSTALLED REPAIR PARTS IAW TR 53-20-05A, DEFECT SIZE: 2 INCHES. - [SDR USAA061021](https://openairdocs.org/sdr/USAA061021), Aug 9, 2006: CARGO TRACK. CORRODED. BS 945, RBL 13.80 CORROSION. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW SRM 53-00-53B REPAIR 2 LEVEL 2 C53-208-01, DEFECT SIZE: 1 INCH. - [SDR USAA061020](https://openairdocs.org/sdr/USAA061020), Aug 9, 2006: DOOR FRAME. CRACKED. AFT CARGO, FWD DOOR FRAME, 3RD STOP PAD FTG DOWN FROM TOP AT FASTENER HOLE CRACKED. INSTALLED FACTORY NEW FRAME AND REINFORCING DOUBLER IAW SRM 51-10-02, DEFECT - [SDR USAA061013](https://openairdocs.org/sdr/USAA061013), Aug 2, 2006: DOOR FRAME. CRACKED. AFT CARGO, FWD DOOR FRAME, 3RD STOP PAD FTG DOWN FROM TOP AT FASTENER HOLE. INSTALLED FACTORY NEW FRAME AND REINFORCING DOUBLER IAW SRM 51-10-02, DEFECT SIZE: . - [SDR USAA061007](https://openairdocs.org/sdr/USAA061007), Aug 1, 2006: ATTACH ANGLE. CRACKED. FOUND ATTACH ANGLE CRACKED, BS 807 RBL 20. DEFECTIVE PART REPLACED WITH IDENTICAL PART IAW SRM 51-40-02, DEFECT SIZE: .5". - [SDR USAA061000](https://openairdocs.org/sdr/USAA061000), Jul 31, 2006: ANGLE. CORRODED. FOUND ANGLE CORRODED, STA 251.5 STR 26 RT FWD NLG AREA. REMOVED DAMAGED PARTS AND INSTALLED REPAIR PARTS IAW EA 97887 LEVEL 2 J3-53-100-01, DEFECT SIZE: 6" BY 1 - [SDR USAA061003](https://openairdocs.org/sdr/USAA061003), Jul 31, 2006: STRINGER. CRACKED. FOUND STRINGER CRACKED BS 530 S4R. REMOVED DAMGED SECTION OF STRINGER FROM BS 510 TO 540 IAW SRM 53-00-03, DEFECT SIZE: .375". - [SDR USAA061004](https://openairdocs.org/sdr/USAA061004), Jul 31, 2006: BRACKET. CRACKED. FOUND BRACKET CRACKED, STA 1156 BL0. INSTALL DOUBLER AND FILLER IAW SRM 51-70-13, DEFECT SIZE: .500". - [SDR USAA061005](https://openairdocs.org/sdr/USAA061005), Jul 31, 2006: MOUNT. CRACKED. FOUND ANTENNA MOUNT CRACKED, STA 727D BL0. FABRICATED NEW ANTENNA MOUNT ANGLES IAW SRM 51-40-02, DEFECT SIZE: .5". - [SDR USAA060973](https://openairdocs.org/sdr/USAA060973), Jul 27, 2006: ANGLE. CORRODED. STA 251.5 STR 26 RT FWD NLG AREA. REMOVED DAMAGED PARTS AND INSTALLED REPAIR PARTS IAW EA 97887 LEVEL 2 J3-53-100-01, 6 INCH X 1 INCH. - [SDR USAA060976](https://openairdocs.org/sdr/USAA060976), Jul 27, 2006: ANGLE. CORRODED. STATION 312 TO 344 IN FWD INTRY DOOR SILL. DEFECTIVE PART REPLACED WITH IDENTICAL PART , REPLACED ANGLE IAW SRM 51-10-02 LEVEL 1, C53-107-01. DEFECT SIZE: 4 INC - [SDR USAA060972](https://openairdocs.org/sdr/USAA060972), Jul 26, 2006: STRINGER. CORRODED. STA 986.5 0BL. REMOVED 9.0 SECTION OF STRINGER, SPLICED NEW SECTION IAW SRM 53-00-03 LEVEL 2 C53-202-01 DEFECT SIZE: 7.5 INCH. - [SDR USAA060971](https://openairdocs.org/sdr/USAA060971), Jul 26, 2006: ANGLE. CORRODED. BS831-892 ABOVE S-26L, REPLACED WITH IDENTICAL PART IAW CC 1729840, LEVEL 1 C53-208-01, DEFECT SIZE: 6 INCHES X 1 INCHES. - [SDR USAA060962](https://openairdocs.org/sdr/USAA060962), Jul 26, 2006: STRAP. CRACKED. BS312 RBL 48, REPLACED STRAP IAW SRM 51-10-02 DEFECT SIZE: 1 INCH. All 123: https://openairdocs.org/deregistered/N504AU-2010-10-06/reports.md --- 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.