# Service difficulty reports: Boeing 747-400 A list on [Boeing 747-400](https://openairdocs.org/model/boeing-747-400.md). Newest first. General aviation reporting is voluntary. Page 1 of 6 · 275 reports - [SDR 9WGA2026042725802](https://openairdocs.org/sdr/9WGA2026042725802.md): Skin · corroded · Apr 25, 2026 · N258SN · Boeing 747400 · Wing, Plate/Skin > RIGHT HAND WING UPPER SURFACE TRAILING EDGE SIDE WAS FOUND WITH CORROSION FROM STA ERSS 1646.716 TO WBL 1247, DURING HEAVY CHECK, PER WO 15698, NRC 940659, SEQ 459, PERFORMED BLEND AREA RH WING UPPER SURFACE T/E SIDE FROM STA ERSS 1646.716 TO WBC 1241 (1687 - - [SDR U2RA2026011000029](https://openairdocs.org/sdr/U2RA2026011000029.md): Skin · cracked · Jan 7, 2026 · N663CA · Boeing 747400 · Wing, Plate/Skin > THREE INCH CRACK WAS IDENTIFIED IN THE LEFT WING LEADING EDGE UPPER SPLICE PLATE. ACCOMPLISHED MAJOR REPAIR IAW FLIGHT VEHICLES CONSULTING INC. ENGINEERING ORDER CONTROL 25197-3. - [SDR UIEA2025091101180](https://openairdocs.org/sdr/UIEA2025091101180.md): Idg · faulted · Sep 9, 2025 · N405KZ · Boeing 747400 · AC Generator-Alternator > ELEC DRIVE 1 ILLUMINATED ON EICAS. REMOVED AND REPLACED #1 IDG PER AMM 24-11-01. OPS/LEAK CHECK GOOD. MESSAGE CLEARED.

) - [SDR 2023F00284](https://openairdocs.org/sdr/2023F00284.md): Duct · damaged · Sep 21, 2023 · N904A · Boeing 747400 · Trailing Edge Flap Control System > DURING FLAP RETRACTION - FLAP DRIVE MSG (LE L1 DRIVE FAIL FCU 27674), CREW DECLARED EMERGENCY,DUMPED FUEL AND RETURNED TO AIRPORT (LAX).AFTER T/S SYSTEM, FOUND LE L1 PDU NPEUMATIC DUCT FLANGE DAMAGE. - [SDR UIEA2022111701192](https://openairdocs.org/sdr/UIEA2022111701192.md): Panel · missing · Nov 17, 2022 · N406KZ · Boeing 747400 · Nacelle/Pylon Structure > #3 PYLON FOUND MISSING PANEL 471AL MISSING ON ARRIVAL(INSTALLED TEMP PANEL PER EO 4454A089 AND PERFORMED PART DEPARTURE INSPECTION PER AMM 05-51-58-200-801.) - [SDR SBOY202207260002](https://openairdocs.org/sdr/SBOY202207260002.md): Tank · leaking · Jul 26, 2022 · Boeing 747400 · Powerplant System > AIRCRAFT REG: 9V-SCB. AIRCRAFT RETURNED TO BASE DUE FLIGHT CREW REPORTED FUEL MIST OBSERVED AT THE RIGHT HAND (RH) ENGINE DURING CRUISE. ACTION TAKEN:FOLLOWING AIRCRAFT ARRIVAL, INSPECTION PERFORMED ON THE RH ENGINE FOUND 1-OFF MOUNTING BOLT OF THE HYDRO-M - [SDR SBOY202207220001](https://openairdocs.org/sdr/SBOY202207220001.md): Skin Panel · cracked · Jul 22, 2022 · Boeing 747400 · Fuselage Main, Bulkhead > DURING ACCOMPLISHMENT OF IED STA 2598 BULKHEAD SURFACE & OPEN HOLE HFEC INSPECTION (UPPER AREA), FOUND 2 OPEN FASTENER HOLE WITH CRACK INDICATION ON FRAME SUPPORT LOWER SPLICE FITTING LH & RH. AIRCRAFT REG: 9V-SFI 747-400 FREIGHTER. REFERENCE SB 747-53A2427. - [SDR 2022FA0000353](https://openairdocs.org/sdr/2022FA0000353.md): None · none · Jul 18, 2022 · N577UP · Boeing 747400 · Lighting System > CREW REPORTED ON PREFLIGHT, THAT THE RIGHT WING NAV LIGHT IS NOT WORKING. CREW MADE A LOGBOOK ENTRY. AMT TRANSFERRED THE ENTRY TO MAINTENIX AND DEFERRED THE RIGHT WING NAV LIGHT T3F18E000FN37. HE DID NOT CLOSE THE WORK PACKAGE. THE WORK PACKAGE WAS READY TO C - [SDR SAJF202201250001](https://openairdocs.org/sdr/SAJF202201250001.md): None · none · Jan 21, 2022 · Boeing 747400 · Fuel Control/Turbine Engines > 2022/01/21 B-18725 CI-5321 JFK-ANC/JFK ENG 4 N1/N2 100%/90% TWO TIMES DURING CLIMB AND A/C VIBRATION FEEL. FLIGHT CREW FELT AIRCRAFT YAW AND VIBRATION CAUSED BY POWER LOSS. AFTER CHECKING OTHER PARAMETERS, THERE WAS NO ABNORMALITY. THE FLIGHT CREW FOLLOW QRH F - [SDR SAJF202201210001](https://openairdocs.org/sdr/SAJF202201210001.md): None · none · Jan 17, 2022 · Boeing 747400 · Turbine Engine Compressor Section > 2022/01/17 B-18720 CI-5122 ANC-ORD/ANC RTO DUE TO TAKE OFF ROLL ENGINE 1 SURGE AND NOISE SOUND. THE CREW FOLLOWS QRH TO RETARD THRUST LEVER TO IDLE, ABORT TAKEOFF AND RETURN TO GATE. - [SDR KC1R20211104001](https://openairdocs.org/sdr/KC1R20211104001.md): Disc · cracked · Nov 4, 2021 · Boeing 747400 · Turbine Section > AS RECEIVED, THERE ARE MULTIPLE CRACK INDICATIONS FOUND ON THE SERRATION LOCATION 61. THE CRACK INDICATIONS ARE FOUND AT 35 SERRATION LOCATIONS. THE CRACKS APPEAR TO CROSS CORNERS AT SOME LOCATIONS. NO CRACKS ARE PERMITTED PER INSPECTION/CHECK-05.AD 2012-02-11 - [SDR KC1R20210622001](https://openairdocs.org/sdr/KC1R20210622001.md): Turbine Wheel · cracked · Jun 22, 2021 · Boeing 747400 · Turbine Section > AS RECEIVED, THERE ARE MULTIPLE CRACK INDICATIONS FOUND ON THE SERRATION LOCATION 61. THE CRACK INDICATIONS ARE FOUND AT TWO SERRATION LOCATIONS. THE CRACKS APPEAR TO CROSS CORNERS AT SOME LOCATIONS. THE CRACKS APPEAR TO GROW IN THE DIRECTION OF THE DISK BORE. - [SDR UIEA2021050701087](https://openairdocs.org/sdr/UIEA2021050701087.md): Skin · broken · May 4, 2021 · N405KZ · Boeing 747400 · Ailerons > BROKEN SKIN, LH WING INBD AILERON T/E OUTBD EDGE(

REPAIR BROKEN SKIN, LH WING INBD AILERON T/E OUTBD EDGE. SEE J/C ATTACHING SHEET NO. 0237793, 0237794, 0237673 FOR REPAIR DETAIL. CONDITION CHECK IS SATISFACTORY.

) - [SDR UIEA2021050701088](https://openairdocs.org/sdr/UIEA2021050701088.md): Skin · chafed · May 4, 2021 · N405KZ · Boeing 747400 · Ailerons > CHAFFING SKIN PANEL, RH WING INBD AILERON OUTBD END T/E AREA(

REPAIR CHAFFING SKIN PANEL, RH WING INBD AILERON OUTBD END T/E AREA. SEE J/C ATTACHING SHEET NO. 0237792, 0237674 FOR REPAIR DETAIL. CONDITION CHECK IS SATISFACTORY.

) - [SDR UIEA2021050701089](https://openairdocs.org/sdr/UIEA2021050701089.md): Door Frame · broken · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Structure > FOUND MAIN DECK CGO L5 ENTRY DOOR FWD FRAME BROKEN(

REMOVED AFFECTED FASTENERS TO GET ACCESS IAW SRM 51-40-02 REV 91. REPAIRED DAMAGED AREA IAW SRM 53-60-15-2R-3 REPAIR 3 REV 91 AND EI NO. T2021A53M-1269 REV 1. REINSTALLED FASTENERS IAW SRM 51-40-02 RE - [SDR UIEA2021050701090](https://openairdocs.org/sdr/UIEA2021050701090.md): Rib · cracked · May 4, 2021 · N405KZ · Boeing 747400 · Horizontal Stabilizer, Spar/Rib > CRACKED RIB, RH HORIZONTAL STAB INTERNAL RIB. STAB BL 421(

REMOVED AFFECTED FASTENERS TO GET ACCESS IAW SRM 51-40-02 REV 91. REPAIR DAMAGE AREA IAW SRM 55-10-09-2R-13 REPAIR 13 REV 91. INSTALLED FASTENERS IAW SRM 51-40-02 REV 91. AND DWG NO. 65BO3520 SHEET 2 - [SDR UIEA2021050701091](https://openairdocs.org/sdr/UIEA2021050701091.md): Seal · out of position · May 4, 2021 · N405KZ · Boeing 747400 · Cargo/Baggage Doors > FOUND THE PRESSURE SEAL INTERFERE WITH ARM SWITCH IN AFT CGO DOOR CONTROL PANEL(

ACCOMPLISHED EGAT EI NO. T202152E-1450 REV. 0 AND W/O NO. 5881407 CLOSE

) - [SDR UIEA2021050701092](https://openairdocs.org/sdr/UIEA2021050701092.md): Stiffener · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Wing Miscellaneous Structure > EXFOLIATION CORROSION - STIFFENER, LH WING CTR L/E REFUELING DOOR(

REMOVED AND REPLACED DAMAGED PARTS IAW SRM 51-40-02 REV 91 AND DWG NO. 65B10882 SH 7 REV C. CONDITION CHECK NORMAL.

) - [SDR UIEA2021050701093](https://openairdocs.org/sdr/UIEA2021050701093.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEM ASSEMBLY INTERIOR STRUCTURE, STA 1271 RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP REFER TO J/C ATTACHING SHEET NO. 0291702 AND DATA SHEET NO. 5767394-1. ACCOMPLISHED EI NO. T202153M-1167 REV 1. C - [SDR UIEA2021050701094](https://openairdocs.org/sdr/UIEA2021050701094.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1400 LBL 9(

BLENEDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORM NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291706 AND DATA SHEET NO. 5767375-1. ACCOMPLISHED EI NO. T202153M-1167 REV 1 AN - [SDR UIEA2021050701095](https://openairdocs.org/sdr/UIEA2021050701095.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE, STA 1383 LBL 9(

BLENDED OUT THE DAMAGED AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291704 AND DATA SHEET NO. 5767374-1. ACCOMPLISHED EI NO. T202153M-1167 REV 1 - [SDR UIEA2021050701096](https://openairdocs.org/sdr/UIEA2021050701096.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1441, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51+10+02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291711 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. CONDITION - [SDR UIEA2021050701097](https://openairdocs.org/sdr/UIEA2021050701097.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1425, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291709 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. COND - [SDR UIEA2021050701098](https://openairdocs.org/sdr/UIEA2021050701098.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE, STA 1442, LBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291712 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. CON - [SDR UIEA2021050701099](https://openairdocs.org/sdr/UIEA2021050701099.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1413, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291708 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. COND - [SDR UIEA2021050701100](https://openairdocs.org/sdr/UIEA2021050701100.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1270 LBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291701 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. CONDI - [SDR UIEA2021050701101](https://openairdocs.org/sdr/UIEA2021050701101.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY, INTERIOR STRUCTURE STA 1387, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291705 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. CON - [SDR UIEA2021050701102](https://openairdocs.org/sdr/UIEA2021050701102.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1331.5, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291703 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. CO - [SDR UIEA2021050701103](https://openairdocs.org/sdr/UIEA2021050701103.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1400, RBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291707 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. COND - [SDR UIEA2021050701104](https://openairdocs.org/sdr/UIEA2021050701104.md): Keelbeam · corroded · May 4, 2021 · N405KZ · Boeing 747400 · Fuselage Main, Keel > CORROSION - CHORD, KEEL BEAM ASSEMBLY INTERIOR STRUCTURE STA 1433, LBL 9(

BLENDED OUT THE DAMAGE AREA IAW SRM 51-10-02 REV 91. PERFORMED NDT INSP. REFER TO J/C ATTACHING SHEET NO. 0291710 AND DATA SHEET NO. 5767371-1. ACCOMPLISHED EI NO. T202153M. COND - [SDR UIEA2021050701105](https://openairdocs.org/sdr/UIEA2021050701105.md): Wire · misrouted · May 4, 2021 · N405KZ · Boeing 747400 · Electrical Power System Wiring > FOUIND WIRE NO. W4698-705-20 NOT ROUTE CORRECTLY IAW SB 747-21-2550 (AD)(

TRANSFER TO EO NO. 4421A098 REV 9 AND W/O NO. 5775917 CLOSE.

) - [SDR KC1R20210326001](https://openairdocs.org/sdr/KC1R20210326001.md): Turbine Wheel · cracked · Mar 26, 2021 · Boeing 747400 · Turbine Section > AS RECEIVED, THERE ARE MULTIPLE CRACK INDICATIONS FOUND ON THE DISC FIRTREE SERRATION LOCATION 61. SOME OF THE CRACKS ARE VISIBLE TO WHITE LIGHT INSPECTION. THE CRACKS APPEAR TO CROSS THE CORNERS AT SOME LOCATIONS. THIS IS A SIMILAR PROBLEM THAT WAS PREVIOUSLY - [SDR KC1R20210112001](https://openairdocs.org/sdr/KC1R20210112001.md): Turbine Wheel · cracked · Jan 12, 2021 · Boeing 747400 · Turbine Section > WE ARE SUBMITTING THIS SDR PER REQUEST OF ROLLS ROYCE. AS RECEIVED, NDT INSPECTION BY FPI METHOD FINDS MULTIPLE CRACK INDICATIONS IN THE SERRATION LOCATION 61 AND ON OUTSIDE DIAMETER LOCATION 34. WE FIND 58 OF THE 62 SERRATION LOCATIONS CONTAIN CRACKS. SOME - [SDR IPXA2020030652848](https://openairdocs.org/sdr/IPXA2020030652848.md): Control Switch · faulty · Mar 5, 2020 · N583UP · Boeing 747400 · Stabilizer Control System > INSPECTION TYPE:NA**ATB, AC OOS ** RESULTED IN ATB ON CLIMBOUT PASSING =11000' WHILE ACCELERATING THROUGH 310 KTS WITH AUTOPILOT ENGAGED "STAB TRIM 2", "STAB TRIM 3" ADVISORY EICAS MSG ILLUMINATED ALONG WITH >AUTOPILOT CAUTION MSG. EMERGENCY DECLARED, JETTIS - [SDR SAJF2020024108034](https://openairdocs.org/sdr/SAJF2020024108034.md): Blade · cracked · Dec 28, 2019 · N18715 · Boeing 747400 · Turbine Section > CI-5224 TPE-ANC ENG2 VIBRATION DURING CLIMB, GROUND CHECK FOUND 1 EA LPT 5 BLADE GOT A NICK AND METAL CHIPS AT ENGINE EXHAUST. FURTHER BSI FOUND LPT 3 VANE BROKEN AND SEVERAL LPT 3 BLADE DAMAGED OVER AMM LIMIT. ENGINE NEED TO BE REPLACED. CI MOC FURTHER SENT A - [SDR SAJF2019050100000](https://openairdocs.org/sdr/SAJF2019050100000.md): Wire · damaged · Mar 21, 2019 · N18709 · Boeing 747400 · Landing Gear System Wiring > 1.. PROBLEM DESCRIPTION:: DURING TOOK-OFF LANDING GEAR RETRACTED AND DOORS CLOSED, PRIMARY AND ALTERNATE PROX SWITCH TARGET FAIL FOR GEAR TILT FAULT OF LT BLG WERE SHOWN ON EICAS. 2.. IINIITIIAL IINVESTIIGATIION:: WHEN THE AIRPLANE DIVERT TO NRT ON GROUND, THE - [SDR SAJF2018110507024](https://openairdocs.org/sdr/SAJF2018110507024.md): Skin · cracked · Nov 4, 2018 · Boeing 747400 · Wing, Plate/Skin > PREFLIGHT CHECK FOUND NR 3 MAIN TANK OVERWING FILL PORT SEEPING. PERFORM INSPECTION FOUND AT RT WING RIB2-RIB3 UPPER SKIN CORROSION AND CRACK. STRUCTURE ENGINEER HAS ISSUED SR SR:4-4287768980 TO REQUEST REPAIR INSTRUCTION. MANUFACTURER TRIM-OUT INSTRUCTION PER - [SDR SAJF2018082907017](https://openairdocs.org/sdr/SAJF2018082907017.md): Slide · no test · Jul 27, 2018 · N18215 · Boeing 747400 · Escape Slide > PERFORMED A C8 CHECK IAW AMP 25-065-02-01-40, TASK. L1 DOOR SLIDE DEPLOY WAS EXECUTED, DURING THE PROCESS, FOUND SLIDE INFLATION WAS ABNORMAL, WHEN INFLATION PROCESS WAS STABLED, UPPER TUBE WAS FOUND LEAKING, DEPLOY WAS INCOMPLETE. THE SLIDE WAS SENT TO EM - [SDR IPXA2018041728677](https://openairdocs.org/sdr/IPXA2018041728677.md): Fire Loop · malfunctioned · Apr 17, 2018 · N575UP · Boeing 747400 · Fire Detection > DESCENDING THROUGH FL180, NR 3 ENGINE FIRE LOOP B STATUS MESSAGE. GROUND TEST PASSED. REPLACED THE NR 3 ENGINE LOWER LOOP ASSY IAW AMM 26-11-02-4, OPS TESTED GOOD. NO STATUS MESSAGE IAW AMM 26-11-00-715-001. - [SDR UIEA2017112402287](https://openairdocs.org/sdr/UIEA2017112402287.md): Fire Warning · false activation · Nov 23, 2017 · N407KZ · Boeing 747400 · Fire Detection > "ENG FIRE NR 1" EICAS. RAN CHECK LIST INDICATION EXTINGUISHED NO BOTTLES DISCHARGED. - [SDR SAJF2017091806032](https://openairdocs.org/sdr/SAJF2017091806032.md): Control Unit · failed · Sep 16, 2017 · Boeing 747400 · AC Generation System > STATUS MESSAGE FOR STBY BUS APU. CMC FOUND MESSAGE 24727 IAW FIM 24-60 TASK 809, REV 90 FOR TROUBLESHOOTING, J4 TO BCU2 WIRING CHECKED NORMAL. SWAPPED BCU 1 AND BCU 2 AND FOUND BCU 2 FUNCTION BAD. REPLACED THE BCU-2 IAW AMM 24-23-01, REV 90. PERFORMED EPGS - [SDR IPXA2017082821075](https://openairdocs.org/sdr/IPXA2017082821075.md): Seal · broken · Aug 28, 2017 · N575UP · Boeing 747400 · Emergency Equipment > NR 4 EMERGENCY DECENT DEIVCE HAS SEAL BROKEN. REMOVED & REPLACED THE DEVICE IAW MM 25-61-01. - [SDR IPXA2017082821074](https://openairdocs.org/sdr/IPXA2017082821074.md): Seal · broken · Aug 28, 2017 · N575UP · Boeing 747400 · Emergency Equipment > NR 3 EMERGENCY DECENT DEVICE HAS SEAL BROKEN. REMOVED & REPLACED THE DEVICE IAW MM 25-61-01. - [SDR IPXA2017082821070](https://openairdocs.org/sdr/IPXA2017082821070.md): Seal · broken · Aug 28, 2017 · N575UP · Boeing 747400 · Emergency Equipment > NR 2 EMERGENCY ESCAPE DEVICE SEAL BROKEN. REMOVED & REPLACED DEVICE IAW MM 25-61-01. - [SDR IPXA2017082821069](https://openairdocs.org/sdr/IPXA2017082821069.md): Escape Reel · unserviceable · Aug 28, 2017 · N575UP · Boeing 747400 · Emergency Equipment > NR 1 EMERGENCY ESCAPE DEVICE SEAL BROKEN. REMOVED & REPLACED THE DEVICE IAW MM 25-61-01. - [SDR IPXA2017082821051](https://openairdocs.org/sdr/IPXA2017082821051.md): Escape Reel · unserviceable · Aug 28, 2017 · N581UP · Boeing 747400 · Emergency Equipment > DURING A CHECK, FOUND EMERGENCY ESCAPE DESENT DEVICE NR 2. BLUE GORMMET SEAL BROKEN. R & R NR 2 EMERGENCY DESENT DEVICE IAW AMM 25-61-01. - [SDR IPXA2017051417070](https://openairdocs.org/sdr/IPXA2017051417070.md): Axe · damaged · May 13, 2017 · N578UP · Boeing 747400 · Emergency Equipment > MAIN CARGO DECK CRASH AXE BLADE DAMAGED. R & R CRASH AXE IAW AMM 25-60-00-216-005. - [SDR SAJF201705230001](https://openairdocs.org/sdr/SAJF201705230001.md): Rod End · cracked · May 7, 2017 · Boeing 747400 · Aileron Control System > LATERAL CONTROL PROBLEM IN FLT. LOSS OF INBOARD AILERON (RIGHT) IN FLT IS SUSPECTED. GROUND CHECK FOUND RT I/B AILERON ACTUATOR ROD END CRACK. REPLACE ACTUATOR ON MAY 8, RETURN MAY 8, AFTERNOON. - [SDR IPXA2017022814506](https://openairdocs.org/sdr/IPXA2017022814506.md): Web · cracked · Feb 11, 2017 · N581UP · Boeing 747400 · Wing Main, Frame Structure > INSPECTION TYPE: C2, CRACK ON RT WING FRONT SPAR WEB UPPER SIDE NEAR FSSI 655. REPAIRED IAW SRID 4-3693546718. - [SDR U2RA201705250001](https://openairdocs.org/sdr/U2RA201705250001.md): Frame · cracked · Jan 28, 2017 · N919CA · Boeing 747400 · Fuselage Main, Frame > DURING ACCOMPLISHMENT OF AD 2016-05-12, SERVICE BULLETIN 747-53A2507 REVISION 2, FOUND BS 1160 PREVIOUS TENSION TIE ATTACH POINT WITH 2 FASTENER HOLES CRACKED. ACCOMPLISHED PARTIAL FRAME SEGMENT REPLACEMENT IAW SRM 53-40-07, REPAIR 3. Next page: https://openairdocs.org/model/boeing-747-400/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE aircraft_model_key = '747400' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/boeing-747-400/reports --- 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.