# N506AU: 1987 Boeing 737-3B7, registration cancelled 2010-09-29

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: September 29, 2010
- Status when cancelled: Triennial form not returned
- 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: 23381
- Year built: 1987
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: June 8, 1987
- Certificate issued: June 27, 2006
- Last registry action: June 16, 2009
- Mode S code: A6504D
- Owner when cancelled: [Aircraft Statutory Trust N506au](https://openairdocs.org/faa-owner/AIRCRAFT%20STATUTORY%20TRUST%20N506AU)
- 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/N506AU
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=506AU
- Page: https://openairdocs.org/deregistered/N506AU-2010-09-29

From the FAA registry file of November 4, 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 (104, newest 50)

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

- [SDR USAA2010070991391](https://openairdocs.org/sdr/USAA2010070991391), Jul 9, 2010: SCREW. LOOSE. MCN - WEEKLY - EEL - EMERGENCY LIGHTS WILL NOT HOLD A CHARGE IN ROWS 1 THRU 4 & AFT CABIN BULL NOSES LAST 4 POSITIONS DO NOT STAY ILLUMINATED FOR REQUIRED TIME 
- [SDR USAA20100709SB113](https://openairdocs.org/sdr/USAA20100709SB113), Jul 8, 2010: SCREW. LOOSE. MCN - MAINTENANCE REPORTED THE EMERGENCY LIGHTS WON'T HOLD A CHARGE AT SEAT ROWS 1 TO 4 AND AT AFT CABIN BULLNOSE IN LAST FOUR POSITIONS. EMERGENCY LIGHTS DON'T
- [SDR USAA20100505SB066](https://openairdocs.org/sdr/USAA20100505SB066), May 3, 2010: BATTERY. FAULTY. CLT - PILOT REPORTED THAT THE RIGHT AFT LAVATORY SMOKE DETECTOR WENT OFF DURING TAXI-OUT. MAINTENANCE REMOVED AND REPLACED THE BATTERY FOR THE RIGHT AFT LAVATOR
- [SDR USAA2009092492616](https://openairdocs.org/sdr/USAA2009092492616), Sep 22, 2009: STRINGER. CORRODED. CLT - C6 - MAJOR REPAIR - CORROSION ON STRINGER BETWEEN BS 978 TO BS 1016, S27L. REPLACED STRINGER BETWEEN BS 978 TO BS 1016, S27L IAW B737 SRM 53-00-03.
- [SDR USAA2009092392601](https://openairdocs.org/sdr/USAA2009092392601), Sep 22, 2009: TIE CLIP. CRACKED. CLT - C5 - MAJOR REPAIR - CRACK ON STRINGER TIE CLIPS AT BS 986 & BS 1006, S27L. REPLACED STRINGER TIE CLIPS AT BS 986 & BS 1006, S27L IAW BOEING DWG 65-46567.
- [SDR USAA2009092492615](https://openairdocs.org/sdr/USAA2009092492615), Sep 21, 2009: SKIN. CORRODED. CLT - C6 - MAJOR REPAIR - CORROSION ON FUSELAGE SKIN BETWEEN BS 1016 TO BS 953 & BETWEEN S25L TO S25R. REPAIRED FUSELAGE SKIN BETWEEN BS 1016 TO BS 953 & BETWEE
- [SDR USAA2009012990220](https://openairdocs.org/sdr/USAA2009012990220), Jan 28, 2009: SKIN. CRACKED. CLT - LINE - MAJOR REPAIR - A 3 INCH CRACK IN FUSELAGE SKIN AT AFT LOWER CORNER OF R1 DOOR, BS 328, WL 208, S17R. REPAIRED FUSELAGE SKIN AT AFT LOWER CORNER OF 
- [SDR USAA920081704](https://openairdocs.org/sdr/USAA920081704), Sep 21, 2008: SKIN. CRACKED. CLT - C5 - MAJOR REPAIR, CRACK ON FUSELAGE SKIN AT BS 727E BELOW S23L. REPAIRED FUSELAGE SKIN AT BS 727E BELOW S23L IAW B737 SRM 53-00-01 REPAIR NR 31 TEMPORARY
- [SDR USAA920081401](https://openairdocs.org/sdr/USAA920081401), Jul 22, 2008: BATTERY. DISCHARGED. FLT 1640 (CLT-EWR) - EMERG EQUIP - EMERGENCY FLASHLIGHT IN AFT GALLEY LIGHT NOT BLINKING. MAINTENANCE REMOVED AND REPLACED THE BATTERY IN THE AFT GALLEY FLASHLI
- [SDR USAA920080671](https://openairdocs.org/sdr/USAA920080671), Mar 22, 2008: STRINGER. CORRODED. CLT - MAJOR REPAIR - RON - CORROSION ON STRINGER, BS 1006 - BS 1016, S26R. REPAIRED STRINGER, BS 1006 - BS 1016, S26R IAW B737 SRM 53-60-03.
- [SDR USAA920071350](https://openairdocs.org/sdr/USAA920071350), Dec 18, 2007: SKIN. CRACKED. CLT - MAJOR REPAIR - A CRACK FOUND ON FUSELAGE SKIN AT BS 520 S10L. INSTALLED REPAIR ON FUSELAGE SKIN AT BS 520, S10L.
- [SDR USAA920070902](https://openairdocs.org/sdr/USAA920070902), Oct 6, 2007: SKIN. CRACKED. CLT - MAJOR REPAIR - C-4 CHECK, CRACKED FUSELAGE SKIN, BS 767, S21R. REPAIRED FUSELAGE SKIN, BS 767, S21R IAW B737-300 SRM 53-00-01.
- [SDR USAA920070901](https://openairdocs.org/sdr/USAA920070901), Oct 6, 2007: WEB. CRACKED. CLT - MAJOR REPAIR -C-4 CHECK, CRACKED WEB, BS 727, S18A RIGHT. REPLACED WEB, BS 727, S18A RIGHT IAW B737-300 SRM 51-10-02 AND 51-40-00.
- [SDR USAA920070905](https://openairdocs.org/sdr/USAA920070905), Oct 5, 2007: SKIN. CRACKED. CLT - MAJOR REPAIR - C-4 CHECK, CRACKED FUSELAGE SKIN, BS 727E - BS 747, S25R. REPAIRED FUSELAGE SKIN, BS 727E - BS 747, S25R IAW B737-300 SRM 53-00-01 REPAIR 3
- [SDR USAA920070904](https://openairdocs.org/sdr/USAA920070904), Oct 5, 2007: STRAP. CRACKED. CLT - MAJOR REPAIR - C-4 CHECK, CRACKED FRAME STRAP, BS 312, S13L. REPLACED FRAME STRAP, BS 312, S13L IAW BOEING DRAWING 65-17684.
- [SDR USAA920070903](https://openairdocs.org/sdr/USAA920070903), Oct 5, 2007: STRINGER. CRACKED. CLT - MAJOR REPAIR - C-4 CHECK, CRACKED STRINGER WEB, BS 727, S18A LEFT. REPAIRED STRINGER WEB, BS 727, S18A LEFT IAW USAIRWAYS EA 98912.
- [SDR USAA070664](https://openairdocs.org/sdr/USAA070664), Aug 24, 2007: SKIN. CRACKED. STA 727D + 17" TO +19", .5 INCH ABOVE STR 22L CENTER LINE HAS CRACK. DOUBLER REPAIR FROM .050 2024-TS INSTALLED PER SRM 53-00-01, REP 31, DEFECT SIZE: 2 INCHES.
- [SDR SB07071](https://openairdocs.org/sdr/SB07071), Aug 22, 2007: SOLENOID. FAULTY. CLT - AFTER TAKEOFF FROM CLT, DURING GEAR RETRACTION FROM UP TO OFF, CREW RECEIVED TWO MAIN LANDING GEAR RED LIGHTS AND A LEFT MAIN LANDING GEAR GREEN LIGHT. FL
- [SDR SB07062](https://openairdocs.org/sdr/SB07062), Aug 8, 2007: LIGHT. INOPERATIVE. DCA - MAINTENANCE REPORTED THE EMERGENCY LIGHT AT SEAT 22C INOPERATIVE. MAINTENANCE REPAIRED THE LIGHT ASSEMBLY AT SEAT 22C. OPERATIONAL CHECK GOOD.
- [SDR SB07032](https://openairdocs.org/sdr/SB07032), Apr 19, 2007: BATTERY PACK. DISCHARGED. BOS - DURING OVERNIGHT CHECK, MAINTENANCE FOUND THE AFT RIGHT REAR GALLEY EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE AFT RIGHT BATTERY P
- [SDR SB07026](https://openairdocs.org/sdr/SB07026), Apr 10, 2007: BATTERY PACK. DISCHARGED. CLT - MAINTENANCE REPORTED THE EMERGENCY LIGHTS AFT OF SEAT ROW 16 INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK FOR AFT SECTION OF SEAT MOUNTE
- [SDR USAA061348](https://openairdocs.org/sdr/USAA061348), Nov 20, 2006: PANEL. CRACKED. STA 685 AT KEELBEAM PANEL CRACKED. DEFECTIVE PART REPLACED WITH IDENTICAL PART, REMOVED AND REPLACED IAW BOEING DWG 65-45866, DEFECT SIZE: 2 INCHES.
- [SDR USAA061334](https://openairdocs.org/sdr/USAA061334), Nov 13, 2006: TEE FITTING. CRACKED. LEFT WING STA 135 INTERNAL CRACKED. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW EA 98206, DEFECT SIZE: 2 INCHES.
- [SDR USAA061335](https://openairdocs.org/sdr/USAA061335), Nov 13, 2006: ANGLE. CRACKED. LOWER TEE ANGLE INSIDE OF RIGHT WING FUEL TANK AT WS 135 CRACKED. REMOVED DAMAGE, FABRICATED REPAIR TEE, FILLER AND DOUBLER AND INSTALLED IAW EA 98207, DEFECT S
- [SDR USAA061336](https://openairdocs.org/sdr/USAA061336), Nov 13, 2006: SPAR. CRACKED. LEFT WING REAR SPAR STA 223 CRACKED. REMOVED AND REPLACED IMG BEAM SUPPORT FITTING PER EA 98203, DEFECT SIZE: .125 INCH.
- [SDR USAA061331](https://openairdocs.org/sdr/USAA061331), Nov 7, 2006: DOOR FRAME. CRACKED. FWD SERVICE DOOR FWD STUB FRAME CRACKED. REMOVED DAMAGED FRAME AND FABRICATED REPAIR PARTS AND INSTALLED NEW FRAME IAW SRM 51-20-01, DEFECT SIZE: .125 INCH.
- [SDR USAA061332](https://openairdocs.org/sdr/USAA061332), Nov 7, 2006: INTERCOSTAL. CRACKED. BS 344 STR 3R CRACKED. REMOVED DAMAGED INTERCOSTAL AND FABRICATED INTERCOSTAL/WEB IAW EA 98233, DEFECT SIZE: .25 INCH.
- [SDR USAA061320](https://openairdocs.org/sdr/USAA061320), Nov 6, 2006: INTERCOSTAL. CRACKED. BS 294.5 AND STR 7L CRACKED. REMOVED AND REPLACED INTERCOSTAL IAW SRM 51-10-02, DEFECT SIZE: 1 INCH.
- [SDR USAA061325](https://openairdocs.org/sdr/USAA061325), Nov 6, 2006: SKIN. DELAMINATED. LEFT I/B AFT FLAP O/B END LWR SIDE DELAMINATED. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW SRM 51-70-10, DEFECT SIZE: 5.250 X 11 INCHES.
- [SDR USAA061324](https://openairdocs.org/sdr/USAA061324), Nov 6, 2006: INTERCOSTAL. CRACKED. STR 14 BETWEEN STA 277 AND STA 294.5 CRACKED. REMOVED DAMAGED INTERCOSTAL AND INSTALLED NEW PART IAW DWG 65-45807, DEFECT SIZE: .250 INCH.
- [SDR USAA061323](https://openairdocs.org/sdr/USAA061323), Nov 6, 2006: SPAR. CRACKED. LEFT LG REAR SPAR UPPER CHORD CRACKED. REAMED AND REWORKED FASTENER HOLE IAW EO 5702V054, DEFECT SIZE: .25 INCH.
- [SDR USAA061321](https://openairdocs.org/sdr/USAA061321), Nov 6, 2006: SKIN. CRACKED. FWD GALLEY DOOR INNER SKIN CRACKED. REMOVED DAMAGE AND INSTALLED FABRICATED REPAIR PARTS IAW TR 52-10-16, DEFECT SIZE: 1 INCH.
- [SDR USAA061310](https://openairdocs.org/sdr/USAA061310), Nov 6, 2006: STRUCTURE. CRACKED. LEFT WING STA 135 INTERNAL CRACKED. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW EA 98206, DEFECT SIZE: 2.5 INCHES.
- [SDR USAA061319](https://openairdocs.org/sdr/USAA061319), Nov 6, 2006: SKIN. CRACKED. FWD GALLEY DOOR INNER SKIN CRACKED. REMOVED DAMAGE AND INSTALLED FABRICATED REPAIR PARTS IAW TR 52-10-16, DEFECT SIZE: 1 INCH.
- [SDR USAA061318](https://openairdocs.org/sdr/USAA061318), Nov 6, 2006: FRAME. CRACKED. BS 291.5 BETWEEN STR 11R AND 10R CRACKED. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW DWG 65-45807, DEFECT SIZE: 2 INCHES.
- [SDR USAA061317](https://openairdocs.org/sdr/USAA061317), Nov 6, 2006: ANGLE. CORRODED. STA 312 360 AT ENTRY DOOR HAS CORROSION. DEFECTIVE PART REPLACED WITH IDENTICAL PART IAW SRM 51-10-02 LEVEL 1 C53-107-02, DEFECT SIZE: 48 INCHES.
- [SDR USAA061316](https://openairdocs.org/sdr/USAA061316), Nov 6, 2006: SUPPORT ANGLE. CRACKED. BETWEEN STA 291.5 AND LOWER STUB FRAME FOR RIGHT SERVICE DOOR CUTOUT. FABRICATED REPAIR ANGLE AND INSTALLED IAW SRM 51-10-02, DEFECT SIZE: 1 INCH.
- [SDR USAA061315](https://openairdocs.org/sdr/USAA061315), Nov 6, 2006: ANGLE. CRACKED. STA 360 STR 15L ANGLE CRACKED. DEFECTIVE PART REPLACED WITH IDENTICAL PART IAW SRM 51-10-02, DEFECT SIZE: 1 INCH.
- [SDR USAA061313](https://openairdocs.org/sdr/USAA061313), Nov 6, 2006: ANGLE. CORRODED. STA 312 TO 360 AT ENTRY DOOR HAS CORROSION. REMOVE AND REPLACE IAW SRM 51-10-02 LEVEL 1 C53-107-02, DEFECT SIZE: 48 INCHES.
- [SDR USAA061312](https://openairdocs.org/sdr/USAA061312), Nov 6, 2006: ANGLE. CORRODED. AFT CARGO RT SIDE FROM STA 747-767 HAS CORROSION. REMOVED DAMAGE AND INSTALLED FABRICATED REPAIR PARTS IAW SRM 53-30-53 LEVEL 2 C53-202-01, DEFECT SIZE: 20 INCH
- [SDR USAA061311](https://openairdocs.org/sdr/USAA061311), Nov 6, 2006: FLOORBEAM. CORRODED. STA 344 24 INCHES FROM LEFT OF BUTT LINE -0- HAS CORROSION. INSTALLED NEW T-CAP SECTION, IAW SRM 53-10-51 FIG 201 LEVEL 1 C53-107-02, DEFECT SIZE: 1 X 1 INCH.
- [SDR USAA061322](https://openairdocs.org/sdr/USAA061322), Nov 6, 2006: SPAR. CRACKED. LEFT LG REAR SPAR UPPER CHORD CRACKED. REAMED AND REWORKED FASTENER HOLE IAW EO 5702V054, DEFECT SIZE: .25 INCH.
- [SDR USAA061299](https://openairdocs.org/sdr/USAA061299), Nov 1, 2006: ANGLE. CORRODED. AFT RIGHT DOOR ZEE ANGLE BETWEEN STA 917.5 TO STA 1006 CORROSION. REMOVED DAMAGED ZEE ANGLE AND REPLACED WITH NEW ANGLE IAW SRM 51-40-02 C53-107-02 LEVEL 1, DEF
- [SDR USAA061300](https://openairdocs.org/sdr/USAA061300), Nov 1, 2006: ANGLE. CRACKED. LOWER TEE ANGLE INSIDE OF RIGHT WING FUEL TANK AT WS 135. REMOVED DAMAGE, FABRICATED REPAIR TEE, FILLER AND DOUBLER INSTALLED IAW EA 98207, DEFECT SIZE: 2.0 INC
- [SDR USAA061301](https://openairdocs.org/sdr/USAA061301), Nov 1, 2006: FLOOR SUPPORT. CORRODED. AFT CARGO RT SIDE FROM STA 747 TO 767 CORROSION. REMOVED DAMAGE AND INSTALLED FABRICATED REPAIR PARTS LEVEL 2 C53-202-01, DEFECT SIZE: 20 INCHES.
- [SDR USAA061302](https://openairdocs.org/sdr/USAA061302), Nov 1, 2006: KEELBEAM. CRACKED. STA 685 AT KEEL BEAM CRACKED. REMOVED AND REPLACED DAMAGE, DEFECT SIZE: 2 INCHES.
- [SDR USAA061303](https://openairdocs.org/sdr/USAA061303), Nov 1, 2006: SKIN. DELAMINATED. LEFT I/B AFT FLAP O/B END LWR SIDE DELAMINATED. REMOVED DAMAGE AND INSTALLED REPAIR PARTS IAW SRM 51-70-10, DEFECT SIZE: 5.250 X 11 INCHES.
- [SDR USAA061304](https://openairdocs.org/sdr/USAA061304), Nov 1, 2006: FLOORBEAM. CORRODED. STA 312 BUTT LINE 0 CORROSION. REMOVED DAMAGED SECTION OF TEE CAP AND INSTALLED REPAIR PARTS IAW SRM 53-10-51 LEVEL 2 C53-107-02, DEFECT SIZE: .25 INCH.
- [SDR USAA061305](https://openairdocs.org/sdr/USAA061305), Nov 1, 2006: DOOR FRAME. CRACKED. FWD CARGO DOOR FRAME AT STA 440 STR 24R LOWER O/B HOLE CRACKED. REMOVED DAMAGE FRAME AND INSTALLED NEW FRAME IAW DWG 6-15224, DEFECT SIZE: 1 INCH.
- [SDR USAA061292](https://openairdocs.org/sdr/USAA061292), Oct 30, 2006: ANGLE. CORRODED. FOUND Z-ANGLES CORRODED, MAIN ENTRY DOOR SILL SUPPORT STRUCTURE. INSTALLED BLENDED MINOR SURFACE CORROSION IAW SRM 51-10-02 LEVEL 1 C53-107-01, DEFECT SIZE: 10"

All 104: https://openairdocs.org/deregistered/N506AU-2010-09-29/reports.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ENG09IA009](https://openairdocs.org/ntsb/ENG09IA009), Jul 15, 2009: Boeing 737-3B7 (N506AU), Charlotte (CLT), NC, incident, minor damage. Probable cause: The failure of the left hand main landing gear was caused by heat induced cracks resulting from abusive grinding/polishing of the chrome plate that was applied during the last overhaul.

## 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 19890604053969I](https://openairdocs.org/incident/19890604053969I), Jun 4, 1989: Boeing 7373B7 (N506AU), Middletown, PA, Minor damage. Scraped bottom of tail on touchdown rollout. Maintenance released aircraft but later found more damage.

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