# N525AU: 1988 Boeing 737-3B7, registration cancelled 2007-11-06

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 6, 2007
- Status when cancelled: Valid registration
- Airframe: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (registry code 138447F)
- Engine: [GE CFM56 series](https://openairdocs.org/engine/ge-cfm56-series) (registry code 30016)
- Serial number: 23860
- Year built: 1988
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: June 6, 1988
- Certificate issued: October 26, 2006
- Last registry action: October 26, 2006
- Mode S code: A69B94
- Owner when cancelled: [737 Portfolio Trust](https://openairdocs.org/faa-owner/737%20PORTFOLIO%20TRUST)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: Corporation
- Owner's area on the map: 39.7357° N, 75.5321° W: Placed by OpenAirDocs: center of Wilmington, DE, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N525AU
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=525AU
- Page: https://openairdocs.org/deregistered/N525AU-2007-11-06

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 (118, newest 50)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR USAA200703007](https://openairdocs.org/sdr/USAA200703007), Mar 27, 2007: SKIN. CRACKED. FOUND 3 INCH CRACK AT STA 767 STR 21L SKIN. REPAIRED PER SRM 53-00-01, REPAIR 31, TR 53-60-03A.
- [SDR USAA20703006](https://openairdocs.org/sdr/USAA20703006), Mar 26, 2007: SKIN. CRACKED. A 1 INCH CRACK FOUND RT SIDE OF FUSELAGE, STA 767, STR 21R. REPAIRED AS PER BAC SRM 53-00-01 REPAIR 31.
- [SDR USAASB06120](https://openairdocs.org/sdr/USAASB06120), Nov 30, 2006: LAMP. BURNED OUT. PIT FLT1904 - ON APPROACH TO PIT FROM CLT, DURING GEAR EXTENSION, CAPTAIN REPORTED HE DID NOT RECEIVE GREEN LIGHTS FOR ALL THREE OF THE GEAR. THE RIGHT MAIN LAN
- [SDR USAA061218](https://openairdocs.org/sdr/USAA061218), Oct 16, 2006: SKIN. CRACKED. AT 2 INCHES FWD OF BS 727E AT S24R CRACK. INSTALLED REPAIR DOUBLER IAW EA 98168, DEFECT SIZE: 2 INCHES.
- [SDR USAA051409](https://openairdocs.org/sdr/USAA051409), Nov 22, 2005: SPAR. CRACKED. LBL 135.5, 12 INCHES FWD FROM REAR SPAR CRACKED. MAJOR REPAIR, REMOVED DAMAGE, INSTALLED REPAIR TEE, FILLERS, AND VERT STIFFENER IAW EA 97047. DEFECT SIZE: 1.5 
- [SDR USAA051377](https://openairdocs.org/sdr/USAA051377), Nov 15, 2005: ANGLE. CORRODED. LEFT TRANSITION ANGLE, STA 727D-807 CORRODED. FABRICATED NEW TRANS ANGLE AND INSTALLED IAW SRM 53-60-53, SRM 51-10-02. DEFECT SIZE: .500 INCH AREA CORROSION AT 
- [SDR USAA051378](https://openairdocs.org/sdr/USAA051378), Nov 15, 2005: FLOOR SUPPORT. CORRODED. BS 500D BETWEEN 26L AND 26R CORRODED. REMOVED DAMAGED PART AND INSTALLED NEW ANGLE IAW SRM 53-30-53 AND SRM 53-00-53. DEFECT SIZE: CORROSION AREAS APPROXIMATELY
- [SDR USAA051379](https://openairdocs.org/sdr/USAA051379), Nov 15, 2005: ANGLE. CORRODED. TOP OF TRANSITION ANGLE BETWEEN STA 767 AND 787 CORRODED. REMOVED DAMAGED SECTION, FAB AND REPLACED WITH NEW SECTION IAW SRM 51-10-2 & BOEING DWG 65-47957. DEFE
- [SDR USAA051380](https://openairdocs.org/sdr/USAA051380), Nov 15, 2005: DOOR FRAME. CRACKED. AFT CARGO DOOR FRAME AFT WEBBING CRACKED. FABRICATED AND INSTALLED NEW WEBBING IAW SRM 51-70-13. DEFECT SIZE: 1 INCH CRACK.
- [SDR USAA051381](https://openairdocs.org/sdr/USAA051381), Nov 15, 2005: ANGLE. CORRODED. RBL 13.80, STA 787-847 CORRODED. CUT OUT DAMAGED SECTION AND SPLICE IN NEW SECTION IAW SRM 53-00-53 FIG 201. DEFECT SIZE: 6 INCH CORROSION.
- [SDR USAA051382](https://openairdocs.org/sdr/USAA051382), Nov 15, 2005: SHEAR TIE. CORRODED. STA 727E BETWEEN STRINGER 27L TO 27R CORRODED. INSTALLED REPAIR PARTS PER SRM 53-00-07. DEFECT SIZE: 2 INCH LONG AREA OF CORROSION.
- [SDR USAA051383](https://openairdocs.org/sdr/USAA051383), Nov 15, 2005: SUPPORT. CORRODED. STA 294-312, LBL 12 CORRODED. REPLACE INTERCOSTAL MEMBER AND T-FITTING IAW SRM 51-10-02. DEFECT SIZE: INTERCOSTAL HAS A 70 INCH AREA OF CORROSION.
- [SDR USAA051384](https://openairdocs.org/sdr/USAA051384), Nov 15, 2005: ANGLE. CRACKED. BS 294; S-17R; ATTACHED TO OUTBOARD SIDE OF ZEE ANGLE CRACKED. PART REPLACED WITH IDENTICAL PART IAW SRM 51-10-02. DEFECT SIZE: 1.5 INCH CRACK IN A 4 INCH LONG 
- [SDR USAA051385](https://openairdocs.org/sdr/USAA051385), Nov 15, 2005: ANGLE. CORRODED. BS 300-353; ZEE ANGLE AT S-17L CORRODED. REPLACED WITH IDENTICAL PART, REMOVED CORRODED ZEE ANGLE WITH NEW IAW SRM 51-10-02 BOEING DWG 65-17688. DEFECT SIZE: AP
- [SDR USAA051386](https://openairdocs.org/sdr/USAA051386), Nov 15, 2005: ANGLE. CORRODED. TRANSITION ANGLE 727B THRU 727D CORRODED. FABRICATED AND INSTALLED REPAIR PART IAW SRM 53-60-53, DEFECT SIZE: 1 INCH CORROSION.
- [SDR USAA051366](https://openairdocs.org/sdr/USAA051366), Nov 11, 2005: ANGLE. CORRODED. FOUND CORROSION BS 300-353 ZEE ANGLE AT S-17L. DEFECTIVE PART REPLACED WITH IDENTICAL PART, REMOVED CORRODED ZEE ANGLE IAW 65-17688, DEFECT SIZE: 1 BY 43 INCHES
- [SDR USAA051365](https://openairdocs.org/sdr/USAA051365), Nov 11, 2005: ANGLE. CORRODED. FOUND CORROSION ON R-1 DOOR THRESHOLD INNER CHORD ANGLE BS 296. REPAIR, DEFECTIVE PART REPLACED WITH IDENTICAL PARTY IAW SRM 51-10-02, DEFECT SIZE: 2" BY 5".
- [SDR USAA051364](https://openairdocs.org/sdr/USAA051364), Nov 11, 2005: WEB. CRACKED. FOUND CRACK FUSELAGE STATION 353 STRINGER 16 LEFT. REPAIR, CUT WEB TO REMOVE DAMAGE, FABRICATED AND INSTALLED REPAIR IAW SRM 53-10-04, EA 97004 DEFECT SIZE: 2.1
- [SDR USAA051363](https://openairdocs.org/sdr/USAA051363), Nov 10, 2005: INTERCOSTAL. CRACKED. STA 344, STA 360, BL0 MAJOR REPAIR, FABRICATED NEW REPAIR PARTS IAW SRM 51-70-11, DEFECT SIZE: .250".
- [SDR USAA051362](https://openairdocs.org/sdr/USAA051362), Nov 10, 2005: FRAME. DAMAGED. FOUND HOLE IN FRAME STA 380, S15L. ENLARGED HOLE TO .125 AND INSTALLED RIVET IAW EA 97066, DEFECT SIZE: .100".
- [SDR USAA051355](https://openairdocs.org/sdr/USAA051355), Nov 9, 2005: ATTACH ANGLE. CRACKED. FOUND STR 25L AND FRAME AT BS 380 CRACKED. FABRICATED AND INSTALLED NEW ANGLE BOEING DWG 69-38780 AND SRM 53-00-01, DEFECT SIZE: 1".
- [SDR USAA051354](https://openairdocs.org/sdr/USAA051354), Nov 9, 2005: FLOORBEAM. CORRODED. FOUND STA 344, LBL42-RBL31; AROUND CLIP NUT HOLES IN FLOOR BEAM CORRODED. REMOVED CORRODED OUT OF LIMITS SECTION OF "T" CAP FROM LBL31 TO RBL31 IAW SRM 53-10-51
- [SDR USAA051356](https://openairdocs.org/sdr/USAA051356), Nov 9, 2005: FLOORBEAM. CRACKED. FOUND BS28/LBL27 CRACKED. FABRICATED AND INSTALLED STIFFENER IAW SRM 51-10-02, DEFECT SIZE: 1".
- [SDR USAA051357](https://openairdocs.org/sdr/USAA051357), Nov 9, 2005: STRINGER CLIP. CRACKED. CRACK FOUND STATION 343 AT STRINGER 11R. STRINGER TIE CLIP WAS FABRICATED IAW BOEING DRAWING 69-38939-5, DEFECT SIZE: .025.
- [SDR USAA051359](https://openairdocs.org/sdr/USAA051359), Nov 9, 2005: FLOORBEAM. CORRODED. FOUND STA 344, LBL 42-RBL3, AROUND CLIP NUT HOLES IN FLOORBEAM. REMOVED AND REPLACED T-CAP FROM LBL 1 TO RBL 32 IAW SRM 53-10-51, FIG 201, DEFECT SIZE: 1" BY 1"
- [SDR USAA051360](https://openairdocs.org/sdr/USAA051360), Nov 9, 2005: INTERCOSTAL. CRACKED. FOUND CRACK BS312 BL0 CABIN FLOOR SUPPORT STRUCTURE. CUTOUT CRACKED AREA, FABRICATED AND INSTALLED REPAIR IAW SRM 51-70-11, DEFECT SIZE: .25".
- [SDR USAA051361](https://openairdocs.org/sdr/USAA051361), Nov 9, 2005: STIFFENER. CRACKED. FOUND STA 328 LBL45 FWD ENTRY FLOOR SUPPORT STRUCTURE CRACKED. REPAIR, FABRICATED NEW L-ANGLE AND INSTALLED IAW SRM 51-10-02 BOEING DWR 65-45812 DEFECT SIZE: .2
- [SDR USAA051358](https://openairdocs.org/sdr/USAA051358), Nov 9, 2005: FLOORBEAM. CORRODED. FOUND CORROSION BS 328 AT RBL 15 AND 12. FABRICATED SPLICE ANGLES AND INSTALLED SPLICE ANGLES AND "T" CAP IAW SRM 53-10-51, DEFECT SIZE: 7" BY.65".
- [SDR USAA051352](https://openairdocs.org/sdr/USAA051352), Nov 8, 2005: ANGLE. CRACKED. FOUND STA 350 AT STRINGER 16L CRACKED. REMOVED, FAB, HEAT TREATED AND INST NEW ANGLE IAW SRM 51-10-02, DWG 69-26555 JOB CARD J020-37-20, DEFECT SIZE: .250" CRAC
- [SDR USAA051351](https://openairdocs.org/sdr/USAA051351), Nov 8, 2005: CHANNEL. CRACKED. FOUND BS 360; S15L CRACKED. REMOVED CRACKED CHANNEL AND INSTALLED NEW CHANNEL IAW SRM 51-10-02, DEFECT SIZE: APPROX 1" CRACK.
- [SDR USAA051339](https://openairdocs.org/sdr/USAA051339), Nov 7, 2005: SKIN. DAMAGED. LEFT RUDDER SKIN 96 INCHES FROM THE BASE AND 11 INCHES FROM THE TRAILING EDGE DAMAGED. REMOVED DAMAGED, LAID UP AND INSTALLED REPAIR IAW SRM 55-40-01. DEFECT SI
- [SDR USAA051340](https://openairdocs.org/sdr/USAA051340), Nov 7, 2005: SKIN. DELAMINATED. LEFT RUDDER SKIN 99 INCHES FROM THE BASE AND 19 INCHES IN FROM THE TRAILING EDGE DELAMINATED. REMOVED DAMAGE, LAID UP AND INSTALLED REPAIR IAW SRM 55-40-01. DEF
- [SDR USAA051341](https://openairdocs.org/sdr/USAA051341), Nov 7, 2005: SKIN. GOUGED. WEDGE SKIN 13.5 INCH FROM THE OUTBOARD END GOUGED. REMOVED SKIN AND DAMAGED CORE, INSTALLED CORE, FILLER AND DOUBLER IAW SRM 57-50-15 REV A. DEFECT SIZE: 4.3 X 
- [SDR USAA051342](https://openairdocs.org/sdr/USAA051342), Nov 7, 2005: FLOORBEAM. CORRODED. BS 312, WL 208, LBL 16 TO RBL 16 LEVEL 1 CORROSION. SPLICED IN REPLACEMENT EXTRUSION IAW SRM 53-10-51 FIG 201. DEFECT SIZE: .50 X .50 INCH.
- [SDR USAA051333](https://openairdocs.org/sdr/USAA051333), Nov 4, 2005: TIE CLIP. CRACKED. FUSELAGE STATION 277 STRINGER 10R. REMOVED AND REPLACED STRINGER TIE CLIP IAW SRM 51-10-02. DEFECT SIZE: .075 INCH.
- [SDR USAA051334](https://openairdocs.org/sdr/USAA051334), Nov 4, 2005: FRAME. CRACKED. BETWEEN STRINGERS S-8R AND S-9R STA 480. CUT OUT DAMAGE, INSTALL FRAME DOUBLERS IAW TR 53-10-20. DEFECT SIZE: .5 INCH.
- [SDR USAA051326](https://openairdocs.org/sdr/USAA051326), Nov 3, 2005: SKIN. CRACKED. IN LOWER SKIN OF NR 5 SLAT AT RIVET, ADJACENT TO SLAT ACTUATOR ATTACH. A 30.25 X 3.75 INCH REPAIR DOUBLER ON LOWER SKIN AT CTR OF SLAT ADJ TO ACTUATOR ATTACH IA
- [SDR USAA051327](https://openairdocs.org/sdr/USAA051327), Nov 3, 2005: SKIN. CRACKED. FLOOR SKIN, STA 665, LBL 30. REMOVED DAMAGE, INSTALL FILLER DOUBLER & STIFFENER IAW TYPE REPAIR 53-60-04. DEFECT SIZE: .500 INCH CRACK.
- [SDR USAA051331](https://openairdocs.org/sdr/USAA051331), Nov 3, 2005: SKIN. CRACKED. LOWER SKIN T/E CRACKED. FABRICATED AND INSTALLED REPAIR DOUBLER IAW SRM 57-43-01 FIG 201, DEFECT SIZE: 6 INCH CRACK.
- [SDR USAA051332](https://openairdocs.org/sdr/USAA051332), Nov 3, 2005: TRIM TAB. DELAMINATED. OUTBOARD T/E CORNER DELAMINATED. ROUTED TO COMPOSITE FOR REPAIR IAW SRM 51-70-06 REPAIR NR 6 DEFECT SIZE: 3 INCHES DELAM.
- [SDR USAA051319](https://openairdocs.org/sdr/USAA051319), Nov 2, 2005: BRACKET. CRACKED. LOWER FWD CORNER OF MAIN ENTRY DOOR. FABRICATED AND INSTALLED NEW BRACKET IAW SRM 51-10-02. DEFECT SIZE: .50 INCH.
- [SDR USAA051320](https://openairdocs.org/sdr/USAA051320), Nov 2, 2005: ANGLE. DAMAGED. FOUND VERT STAB TRANSITION ANGLE LEFT SIDE AFT OF REAR ATTACH POINT. FABRICATED AND INSTALLED NEW ANGLE IAW TR 53-20-05A, DEFECT SIZE: 12".
- [SDR USAA051321](https://openairdocs.org/sdr/USAA051321), Nov 2, 2005: STRINGER. CRACKED. S-5AR B.S. 1138 ACTION: INTERIM REPAIR WAS PREVIOUSLY INSTALLED IAW EA 73450B IAW EA 73450B. LENGTH UNKNOWN.
- [SDR USAA051289](https://openairdocs.org/sdr/USAA051289), Nov 1, 2005: ANGLE. CORRODED. FOUND Z-ANGLE CORRODED, STA 955 TO 990 . REMOVED CORRODED PART AND INSTALLED NEW PART AND REPAIR PARTS IAW SRM 53-60-15, DEFECT SIZE: CORROSION ON "Z" ANGLE 1 I
- [SDR USAA051291](https://openairdocs.org/sdr/USAA051291), Nov 1, 2005: FLOORBEAM. CORRODED. FOUND FLOORBEAM CORRODED STA 986.5 AT LT DOOR SILL AREA. REPLACED ENTIRE T-CAP IAW TR 53-10-05B, DEFECT SIZE: .500" AREA OF CORROSION AROUND SEVERAL SCREW HOLES
- [SDR USAA051292](https://openairdocs.org/sdr/USAA051292), Nov 1, 2005: ANGLE. CORRODED. FOUND CORROSION STA 955 TO 990, LBL 53. REMOVED DAMAGED PARTS AND INSTALLED NEW PARTS IAW SRM 51-10-02, DEFECT SIZE: NUMEROUS AREAS OF CORROSION THROUGHOUT THE 
- [SDR USAA051293](https://openairdocs.org/sdr/USAA051293), Nov 1, 2005: ANGLE. CORRODED. FOUND Z-ANGLE CORRODED, FLOOR STRUCTURE AT L2 DOOR, STA 986 AND LBL 53. REMOVED CORRODED PART AND INSTALLED NEW PART IAW SRM 51-10-02, DEFECT SIZE: 1" BY 3" ARE
- [SDR USAA051294](https://openairdocs.org/sdr/USAA051294), Nov 1, 2005: SKIN. DEBONDED. FOUND DISBOND O/B END OF T/E WEDGE. REMOVED DAMAGE, FAB AND INSTALLED REPAIR PARTS IAW TR 51-30-03, DEFECT SIZE: 2" BY 5" DISBOND.
- [SDR USAA051295](https://openairdocs.org/sdr/USAA051295), Nov 1, 2005: SKIN. DEBONDED. FOUND SLAT DISBOND, T/E WEDGE O/B END. REMOVED DAMAGE, FAB AND INSTALLED REPAIR PARTS IAW TR 57-42-04, DEFECT SIZE: 3" X 5" DISBOND.
- [SDR USAA051296](https://openairdocs.org/sdr/USAA051296), Nov 1, 2005: CREASE BEAM. CORRODED. AROUND RIVET HEADS AT CREASE BEAM BS 500B+8 S17L. REMOVED CORROSION AND TREATED AREA IAW SRM 51-20-01, DEFECT SIZE: APPROXIMATE 1/16" DIA SPOTS OF CORROSION.

All 118: https://openairdocs.org/deregistered/N525AU-2007-11-06/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.