# Service difficulty reports: N411SN

A list on [N411SN](https://openairdocs.org/aircraft/N411SN.md).

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

- [SDR 9WGA2022102141101](https://openairdocs.org/sdr/9WGA2022102141101.md): Door · misrigged · Oct 21, 2022 · N411SN · Doug MD11F · Landing Gear Doors
  > DISCREPANCY: AIR RETURN DUE TO VIBRATION. FOUND BOTH FORWARD NOSE LANDING GEAR DOORS OUT OF RIG. RE-RIGGED BOTH DRIVE LINKS IAW AMM 32-23-03, TEST OF THE NOSE GEAR OPERATIONS SATIS IAW AMM 32-31-00-700-801.
- [SDR 9WGA2021051841101](https://openairdocs.org/sdr/9WGA2021051841101.md): Hydraulic System · fluid loss · May 18, 2021 · N411SN · Doug MD11F · Hydraulic System, Main
  > DECLARED EMERGENCY DUE TO LOSS OF HYDRAULIC SYSTEM 3 FLUID QUANTITY.
- [SDR 9WGA2021030441101](https://openairdocs.org/sdr/9WGA2021030441101.md): Fuel Tank · abnormal · Mar 3, 2021 · N411SN · Doug MD11F · Fuel Indicating System
  > FUEL QUANTITY INCREASED DURING FLIGHT. FUEL IN TANKS 1 AND 3 19600KG. TOTAL RISES AND FALLS 3-4K. TANK 1/3 INCREASE 1200K AFTER LANDING.
- [SDR 9WGA2021020341101](https://openairdocs.org/sdr/9WGA2021020341101.md): Unknown · vibration · Feb 3, 2021 · N411SN · Doug MD11F · Fuselage Structure (General)
  > AIR TURN BACK DUE TO SEVERE AIRFRAME VIBRATION AFTER GEAR RETRACTION.
- [SDR 9WGA2021012441101](https://openairdocs.org/sdr/9WGA2021012441101.md): Hydromech Unit · failed · Jan 24, 2021 · N411SN · Doug MD11F · Hydraulic System, Main
  > LVL 2 HYD 3 FAIL. WAS PRECEDED BY HYD 3 ELEV OFF AND HYD 3 QTY LOW. PERFORMED MANUAL GEAR EXTENSION, IAW CHECK LIST.
- [SDR 9WGA2020100241101](https://openairdocs.org/sdr/9WGA2020100241101.md): Oil System · leaking · Oct 2, 2020 · N411SN · Doug MD11F · Turbine Engine Oil System
  > ENGINE 1 OIL QTY REDUCED FROM 20 TO 0/ OIL QTY ZERO.
- [SDR 9WGA2020060874101](https://openairdocs.org/sdr/9WGA2020060874101.md): Unknown · vibration · Jun 7, 2020 · N411SN · Doug MD11F · Fuselage Structure (General)
  > RETURNED BACK TO ANC SECOND TIME. PASSING 1000 FEET, LOUD BANG SHOOK WHOLE AIRPLANE AND FLIGHT CONTROLS.
- [SDR 9WGA2020060641101](https://openairdocs.org/sdr/9WGA2020060641101.md): Unknown · vibration · Jun 6, 2020 · N411SN · Doug MD11F · Fuselage Structure (General)
  > RETURN TO ANC DUE TO STRONG VIBRATIONS OF FRONT FUSELAGE.
- [SDR 9WGA2020060141101](https://openairdocs.org/sdr/9WGA2020060141101.md): Warning System · activated · May 30, 2020 · N411SN · Doug MD11F · Door Warning System
  > A LEVEL 2 ALERT "CARGO DOOR CTR A " APPEARED IN THE CLIMB THROUGH 2000', LIGHT VIBRATION.
- [SDR 9WGA4112020021801](https://openairdocs.org/sdr/9WGA4112020021801.md): Rivet · loose · Feb 18, 2020 · N411SN · Doug MD11F · Nacelle/Pylon, Main Frame
  > REF BOEING TASK CARD 71-101-05-02, WHILE PERFORMING AFT ENG GVI, FOUND SEVERAL LOOSE AND POPPED RIVETS INSIDE ENG INLET (6 O CLOCK POSITION), CORROSION ISSUES.
- [SDR 9WGA202002180192](https://openairdocs.org/sdr/9WGA202002180192.md): Rivet · loose · Feb 18, 2020 · N411SN · Doug MD11F · Nacelle/Pylon, Main Frame
  > DURING SERVICE CHECK, INSPECTION OF BOEING TASK CARD 71-101-05-02, PERFORMING AFT ENG., GVI FOUND SEVERAL LOOSE AND POPPED RIVETS INSIDE ENG INLET (6 O CLOCK POSITION), CORROSION ISSUES BEING WORKED.
- [SDR 9WGA20190617501](https://openairdocs.org/sdr/9WGA20190617501.md): Fire Warning · illuminated · Jun 15, 2019 · N411SN · Doug MD11F · Fire Detection
  > ON DESCENT, #2 ENG FIRE WARNING, ACTIVATED FIRE BOTTLE AND SHUTDOWN #2 ENG
- [SDR 9WGA2019043001](https://openairdocs.org/sdr/9WGA2019043001.md): Connector · shorted · Apr 27, 2019 · N411SN · Doug MD11F · Fire Protection System Wiring
  > AFTER TAKEOFF AND CRUISE LVL 1 INTERMITTENT FIRE DETECTOR ENGINE 2 FAIL WITH ENGINE 2 FIRE WARNING. T/S PER FIM 26-11-01 PERFORMED WIRING CHECK LOOP "A" PIN J AND K FOUND SHORTED TO GROUND. CLEAN CONTAMINATION PERFORMED RTS PER AMM 26-11-02 ALL TEST PASS.
- [SDR 9WGA20190225001](https://openairdocs.org/sdr/9WGA20190225001.md): Hydraulic System · failed · Feb 22, 2019 · N411SN · Doug MD11F · Hydraulic System, Main
  > HYD 3 QTY LO / HYD 3 FAIL. UPON INSPECTION, FOUND NLG DOORS DAMAGED. AIRCRAFT STILL IN WORK TO TROUBLESHOOT AND RESOLVE.
- [SDR 9WGA20180806001](https://openairdocs.org/sdr/9WGA20180806001.md): Longeron · corroded · Aug 6, 2018 · N411SN · Doug MD11 · Fuselage Main, Longeron/Stringer
  > LONGERON 52 CORRODED BETWEEN FRAMES BS 1039 - 1059, IN FORWARD CARGO BAY.
- [SDR 9WGA201804250001](https://openairdocs.org/sdr/9WGA201804250001.md): Bleed Valve · stuck · Apr 25, 2018 · N411SN · Doug MD11F · Compressor Bleed Valve
  > ON TAKE OFF, NR 3 ENGINE EXPERIENCED COMPRESSOR STALL. DUMPED FUEL AND PERFORMED AN AIR TURN BACK. TROUBLESHOT SYSTEM, BORESCOPED ENGINE WITH NO DISCREPANCIES NOTED. FOUND HIGH STAGE BLEED VALVE STUCK IN THE OPEN POSITION.
- [SDR 9WGA5432018030801](https://openairdocs.org/sdr/9WGA5432018030801.md): Bolt · loose · Mar 8, 2018 · N411SN · Doug MD11F · Leading Edge Devices
  > LEVEL 2 ALERT, SLAT DISAGREE DURING INITIAL CLIMB WITH THE FLAP & SLAT HANDLE AT FLAPS 20 DEGREES EXTENDED. FOUND A LOOSE BOLT ON SLAT TRACK NR 16. TIGHTENED IAW AMM 27-20-30. PERFORMED RETURN TO SERVICE OF FCC NR 1 & THE NR 1 SLAT SYSTEM IAW AMM 27-20-01. A
- [SDR 9WGA201711210001](https://openairdocs.org/sdr/9WGA201711210001.md): Landing Gear · malfunctioned · Nov 21, 2017 · N411SN · Doug MD11F · Landing Gear Retraction/Extension System
  > AFTER TAKEOFF, NO LANDING GEAR RETRACTION INDICATION. VIBRATION AND NOISE SUGGESTED THAT GEAR WERE DOWN.
- [SDR 9WGA4112017060202](https://openairdocs.org/sdr/9WGA4112017060202.md): Pitot Tube · blocked · Jun 2, 2017 · N411SN · Doug MD11F · Pitot/Static System
  > SECOND AIR TURN BACK, CADC NR 2 FAILED ON DEPARTURE. TROUBLESHOT SYSTEM AND FOUND A PITOT TUBE BLOCKAGE. REMOVED AND CLEANED PITOT TUBE DRAIN IAW AMM 34-11-01 RETURNED AIRCRAFT TO SERVICE..
- [SDR 9WGA4112017060201](https://openairdocs.org/sdr/9WGA4112017060201.md): Adc · faulted · Jun 2, 2017 · N411SN · Doug MD11F · Air Data Computer
  > LOSS OF CADC NR 2 DURING DEPARTURE. REPLACED THE NR 2 CADC AND RETURN AIRCRAFT TO SERVICE.
- [SDR KO0R201605260057](https://openairdocs.org/sdr/KO0R201605260057.md): Wire · cut · May 26, 2016 · N411SN · Doug MD11F · Light System Wiring
  > COURIER AREA ATTIC AT 53-901 TERMINAL STRIP FOUND TWO CUT WIRES.
- [SDR KO0R201605260056](https://openairdocs.org/sdr/KO0R201605260056.md): Switch · intermittent · May 26, 2016 · N411SN · Doug MD11F · Emergency Lighting
  > ELECTRICAL CONTROL PANEL HAS INTERMITTENT EMER POWER SWITCH.
- [SDR KO0R201605260055](https://openairdocs.org/sdr/KO0R201605260055.md): Light · inoperative · May 26, 2016 · N411SN · Doug MD11F · Emergency Lighting
  > EMERGENCY LIGHTING INOPERATIVE.
- [SDR ERKR2015122600021](https://openairdocs.org/sdr/ERKR2015122600021.md): Spar Cap · corroded · Dec 14, 2015 · N411SN · Doug MD11F · Wing Spar
  > RIGHT UPPER TE SKIN PANEL, OTBD OF WING STATION XW=680, SHOWS SIGNS OF CORROSION. AFTER EVALUATION, RT WING UPPER SPAR CAP CORRODED FROM XORS=773 TO XORS=799.
- [SDR ERKR2016010200024](https://openairdocs.org/sdr/ERKR2016010200024.md): Skin · corroded · Nov 17, 2015 · N411SN · Doug MD11F · Ailerons
  > RIGHT WING UPPER SKIN AT MID-SPAN OF AILERON, APPROX XORS=966 - 1000, CORRODED.
- [SDR ERKR2016012200028](https://openairdocs.org/sdr/ERKR2016012200028.md): Seat Track · broken · Oct 30, 2015 · N411SN · Doug MD11F · Fuselage, Seat/Cargo Attach Fittings
  > MAIN CABIN SEAT TRACK BS 635, X=+27.5 LOWER FLANGES BROKEN AWAY FROM FLOORBEAM.
- [SDR ERKR2015122600018](https://openairdocs.org/sdr/ERKR2015122600018.md): Spar Cap · corroded · Oct 23, 2015 · N411SN · Doug MD11F · Wing Spar
  > RIGHT WING REAR SPAR, LOWER CHORD BY OTBD AILERON HAS CORROSION ON EXISTING REPAIR, AT XORS=1048 - XORS=1054.
- [SDR ERKR2015122600019](https://openairdocs.org/sdr/ERKR2015122600019.md): Spar Cap · corroded · Oct 15, 2015 · N411SN · Doug MD11F · Wing Spar
  > RIGHT WING MID SPAN OF AILERON, AFT SKIN PANEL BULGING.
- [SDR ERKR2015122100013](https://openairdocs.org/sdr/ERKR2015122100013.md): Skin · corroded · Oct 15, 2015 · N411SN · Doug MD11F · Fuselage Main, Plate/Skin
  > UNDER FLOOR PANEL 263BF, APPROX BS 1239, RBL 5 WING CENTER BOX CORRODED. ADDITIONAL AREAS OF EXFOLIATION ON CTR WING UPPER SKIN LOCATED AT, RBL XCW=-15.5, -17, -20, 56.5 & -82.0 ALONG STRINGER 15 & XCW=-71.5 AT STRINGER 19 ALSO XCW=+4.0 STRINGER 15.
- [SDR ERKR2015122600020](https://openairdocs.org/sdr/ERKR2015122600020.md): Spar · corroded · Oct 14, 2015 · N411SN · Doug MD11F · Wing Spar
  > RIGHT WING UPPER TE SKIN PANEL, OTBD OF WING STATION XW=716, SHOWS SIGNS OF CORROSION. AFTER EVALUATION, FOUND RT WING UPPER SPAR CAP CORRODED FROM XORS=799 TO XORS=841.
- [SDR ERKR2015122100014](https://openairdocs.org/sdr/ERKR2015122100014.md): Skin · corroded · Oct 14, 2015 · N411SN · Doug MD11F · Wing, Plate/Skin
  > LEFT WING UPPER TE SKIN PANEL AT XW=670 CORRODED.
- [SDR ERKR2016F00023](https://openairdocs.org/sdr/ERKR2016F00023.md): Spar Cap · corroded · Oct 14, 2015 · N411SN · Doug MD11F · Wing Spar
  > LEFT WING UPPER T/E SKIN PANEL CORRODED AT WS XW670 EXTENDING INBD ALONG THE UPPER WING REAR SPAR UPPER CAP ON FORWARD SIDE OF CHORD BETWEEN WING UPPER SKIN AND CHORD AT BS 772.5.
- [SDR ERKR2016010400027](https://openairdocs.org/sdr/ERKR2016010400027.md): Floorbeam · corroded · Sep 24, 2015 · N411SN · Doug MD11F · Fuselage Main, Floor Beam
  > MAIN DECK FLOOR SUPPORT AT STATION 495, BETWEEN RBL 66 - RBL 94.5, CORRODED.
- [SDR ERKR2016010400026](https://openairdocs.org/sdr/ERKR2016010400026.md): Floorbeam · corroded · Sep 24, 2015 · N411SN · Doug MD11F · Fuselage Main, Floor Beam
  > MAIN DECK FLOOR SUPPORT AT STATION 495, BETWEEN RBL 29 - RBL 61, CORRODED.
- [SDR ERKR2016010200025](https://openairdocs.org/sdr/ERKR2016010200025.md): Floorbeam · corroded · Sep 24, 2015 · N411SN · Doug MD11F · Fuselage Main, Floor Beam
  > MAIN DECK FLOOR SUPPORT AT STATION 460, BETWEEN BL 0 & RBL 88, CORRODED.
- [SDR ERKR2015122600022](https://openairdocs.org/sdr/ERKR2015122600022.md): Skin · corroded · Jul 30, 2015 · N411SN · Doug MD11F · Wing, Plate/Skin
  > LEFT WING UPPER SURFACE SKIN AT XOR 532, STRINGER 10 AT FWD SIDE OF TANK ACCESS HAS EXFOLIATION.
- [SDR ERKR2015121400012](https://openairdocs.org/sdr/ERKR2015121400012.md): Support · corroded · Jun 6, 2015 · N411SN · Doug MD11F · Fuselage Miscellaneous Structure
  > AFT SUPPORT RAIL FOR WING TO BODY FAIRING 153DB, CORRODED SEVERAL LOCATIONS.

## 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 n_number = 'N411SN' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N411SN/reports

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