# Service difficulty reports: N401YK, cancelled Oct 6, 2026

A list on [N401YK, cancelled Oct 6, 2026](https://openairdocs.org/deregistered/N401YK-2026-10-06.md).

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

- [SDR NACA2024120200001](https://openairdocs.org/sdr/NACA2024120200001.md): Seat Track · cracked · Dec 2, 2024 · N401YK · Boeing 737436 · Fuselage, Seat/Cargo Attach Fittings
  > SEAT TRACK CRACKED BELOW STOP FITTING AT BS 887 LBL 45.50. SEAT TRACK REMOVED AND REPLACED FROM 480-510 AT LBL 24.75 IAW 737-400 SRM 51-4002 REPAIR OPTION 2.
- [SDR NACA2023122200002](https://openairdocs.org/sdr/NACA2023122200002.md): Smoke Detector · failed · Dec 22, 2023 · N401YK · Boeing 737436 · Smoke Detection
  > LAVATORY SMOKE ALARM ACTIVATED IN FLIGHT, RESULTING IN MI @ 1740Z. DEFERRED PER MEL 26-16-02 CAT D. LAV SMOKE DETECTOR REMOVED AND REPLACED. PART INFO UNKNOWN TO TRAX.
- [SDR NACA2023112800001](https://openairdocs.org/sdr/NACA2023112800001.md): Power Supply · failed · Nov 28, 2023 · N401YK · Boeing 737436 · Emergency Lighting
  > OPERATIONAL TEST FOUND THE EMERGENCY LIGHT FAILURE, EQUIP.NO: M1675, S/N:32476. REPLACED THE EMERGENCY LIGHT POWER SUPPLY REF AMM 33-51-51-962-016.
- [SDR NACA2023102700001](https://openairdocs.org/sdr/NACA2023102700001.md): Unknown · unknown · Oct 27, 2023 · N401YK · Boeing 737400 · Leading Edge Devices
  > DURING NRC: CA1502/253 AFTER CORROSION REMOVED CHK OVER LIMIT. REMOVED DAMAGED SKIN AT #3 SLAT T/E WEDGE UPPER SURFACE BETWEEN SS 36.5 AND SS 38.3. MADE THE REPAIR FILLER AND DOUBLER, INSTALLED REPAIRED PARTS AND PERFORMED PERMANENT 250 DEGREE CURE METAL BOND
- [SDR NACA2023102600001](https://openairdocs.org/sdr/NACA2023102600001.md): Unknown · unknown · Oct 26, 2023 · N401YK · Boeing 737436 · Flight Compartment Windows
  > CABIN WINDOW FRAME GOT CORROSION ON STA 767+10 (R33) 1. BS767+7 S-11R+1.5'' 2. BS767+16 S-11R+13''. REPAIRED PER SRM 56-20-02
- [SDR NACA2023102100003](https://openairdocs.org/sdr/NACA2023102100003.md): Unknown · unknown · Oct 21, 2023 · N401YK · Boeing 737400 · Fuselage Main, Structure
  > CABIN WINDOW FRAME GOT CORROSION ON STA 727G+10(L30). BS727+5, S-11L+15". REPAIRED PER SRM 56-20-02 AND EO 737-56-007
- [SDR NACA2023102100002](https://openairdocs.org/sdr/NACA2023102100002.md): Unknown · unknown · Oct 21, 2023 · N401YK · Boeing 737400 · Fuselage Main, Structure
  > CABIN WINDOW FRAME GOT CORROSION ON STA 727F+10(L29).1.BS727+6,S-11L+8" 2.BS727+11,S-11L+16". REPAIRED PER SRM 56-20-02
- [SDR NACA2023102100001](https://openairdocs.org/sdr/NACA2023102100001.md): Unknown · unknown · Oct 21, 2023 · N401YK · Boeing 737400 · Fuselage Main, Structure
  > CABIN WINDOW FRAME CORROSION ON STA 727C +10 (L26), REPAIRED PER SRM 56-20-02
- [SDR NACA2023102000001](https://openairdocs.org/sdr/NACA2023102000001.md): Light · failed · Oct 20, 2023 · N401YK · Boeing 737400 · Emergency Lighting
  > OPERATIONAL TEST FOUND EMERGENCY LIGHT FAILURE. REPLACE EMERGENCY LIGHT IAW AMM 33-51-51-962-016. OPS TEST NORMAL.
- [SDR 2022F00063](https://openairdocs.org/sdr/2022F00063.md): Hinge Fitting · cracked · Feb 23, 2022 · N401YK · Boeing 737 · Fuselage, Door Hinge
  > FORWARD ENTRY DOOR LOWER HINGE FITTING PN: 65C36075-1; INSTALLED FITTING IS CRACKED.
- [SDR 2022FA0000097](https://openairdocs.org/sdr/2022FA0000097.md): Hinge Fitting · cracked · Feb 23, 2022 · N401YK · Boeing 737 · Fuselage, Door Hinge
  > FORWARD ENTRY DOOR LOWER HINGE FITTING PN: 65C36075-1; INSTALLED FITTING IS CRACKED.
- [SDR 2022F00105](https://openairdocs.org/sdr/2022F00105.md): Tee Angle · corroded · Feb 10, 2022 · N401YK · Boeing 737400 · Fuselage Structure (General)
  > AFT CARGO FLOOR PANEL STA 727-STA 727D SHOWS AMUMINUM BUT-JOINT STRIP PRIMER & PAINT DETERIORATED. NRC495
- [SDR 2022F00077](https://openairdocs.org/sdr/2022F00077.md): Lens · cracked · Feb 9, 2022 · N401YK · Boeing 100BOEING · Emergency Lighting
  > FWD GALLEY SERVICE DOOR AREA EMERGENCY EXIT PLASTIC SIGN B08 BROKEN AT BOTH FWD/AFT UPPER CORNERS
- [SDR 2022F00078](https://openairdocs.org/sdr/2022F00078.md): Lens · cracked · Feb 9, 2022 · N401YK · Boeing 737400 · Emergency Lighting
  > FWD ENTRY DOOR AREA PLASTIC EXIT EMERGENCY EXIT SIGN BROKEN AT LOWER FWD CORNER.
- [SDR NACA2020010824177](https://openairdocs.org/sdr/NACA2020010824177.md): Stringer Clip · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Attach Fittings
  > BS727A, S20L CRACKED STRINGER CLIP. REPLACED CRACKED STRINGER CLIP AT STA 727A, STR 20L WITH NEW PART, PN 69-35352-2 IAW B737-400 SRM 51-40-02, REV 104 AND BOEING DWG #65-46595 REV K.
- [SDR NACA2020010800176](https://openairdocs.org/sdr/NACA2020010800176.md): Frame · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Frame
  > BS500F, S20L - S21L, 1.04" WIRING PENETRATION HOLE CRACKED IN FRAME WEB. REPAIR IAW SB 737-53A1279 B737-400, 53-00-07 REPAIR 20
- [SDR NACA2019122400175](https://openairdocs.org/sdr/NACA2019122400175.md): Frame · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Frame
  > BS500B, S21R - S22R TOOLING HOLE CRACKED IN FRAME. CONTACT BOEING ENGINEERING, SDR STILL OPEN
- [SDR NACA2019122400174](https://openairdocs.org/sdr/NACA2019122400174.md): Skin · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > BS340, WL208 3 CRACKS FOUND AT L1 DOOR AFT LOWER CORNER ON FUSELAGE SKIN. CONTACT PEMCO ENGINEERING, SDR STILL OPEN
- [SDR NACA2020010800173](https://openairdocs.org/sdr/NACA2020010800173.md): Bulkhead · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Bulkhead
  > CRACK FOUND ON BS178 BULKHEAD WEB AT LBL5.7 BETWEEN WL207 AND WL195. REPAIR PER SRM 53-10-08 REPAIR 10
- [SDR NACA2020010800172](https://openairdocs.org/sdr/NACA2020010800172.md): Probe · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Pitot/Static System
  > RIGHT HAND ELEVATOR FEEL PITOT PROBE DAMAGED/CORRODED. REPLACED L/H ELEVATOR FEEL PITOT PROBE PN: 0851CM-2 SN: 167646 WITH NEW PITOT PROBE PN: 0851CM-2 SN: 166550 IAW B737-400 AMM 27-31-94 REV 90 SEE ATTACHED MTC-114 FOR SYSTEM TESTS AND DETAILS.
- [SDR NACA2020010800171](https://openairdocs.org/sdr/NACA2020010800171.md): Probe · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Pitot/Static System
  > LEFT HAND ELEVATOR FEEL PITOT PROBE DAMAGED/CORRODED. REPLACED L/H ELEVATOR FEEL PITOT PROBE PN: 0851CM-2 SN: 167646 WITH NEW PITOT PROBE PN: 0851CM-2 SN: 166550 IAW B737-400 AMM 27-31-94 REV 90 SEE ATTACHED MTC-114 FOR SYSTEM TESTS AND DETAILS.
- [SDR NACA2020010800170](https://openairdocs.org/sdr/NACA2020010800170.md): Floorbeam · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Floor Beam
  > BS660 - BS666, FLOOR BEAM LOWER CHORD, LBL24.82 CRACK INDICATION IN FORWARD HOLE. RBL24.82 CRACK INDICATIONS IN FORWARD AND AFT HOLES. UPSIZE TO REMOVE CRACK IAW SB737-57A1296
- [SDR NACA2020010800169](https://openairdocs.org/sdr/NACA2020010800169.md): Intercostal · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS279, S14R, CRACK FOUND ON FORWARD RADIUS TRIM OUT OF INTERCOSTAL (NDT HAS VERIFIED). REPLACED INTERCOSTAL AT STA 279 STR 14R WITH NEW PART IAW B737-400 SRM 51-10-02 REV 104 AND INSTALLED IAW B737-400 SRM 51-40-02 REV 104. INSTALLED PART NUMBER 65-45807-8 IA
- [SDR NACA2020010800168](https://openairdocs.org/sdr/NACA2020010800168.md): Bracket · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS332.1, S8R, INTERCOSTAL T-BRACKET FOR DOOR STOP #1 CRACKED IN LOWER RADIUS. (VERIFIED BY NDT). AFT SIDE OF R1 DOOR. REPLACED STA 332.1 STR 8R, INTERCOSTAL T-BRACKET FOR DOOR STOP #1 AFT SIDE OF R1 DOOR IAW BOEING DOC# 65-45813 REV AC & INSTALLED IAW B737-40
- [SDR NACA2020010800167](https://openairdocs.org/sdr/NACA2020010800167.md): Skin · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Horizontal Stabilizer, Plate/Skin
  > RIGHT HAND LOWER HORIZONTAL STABILIZER SKIN, HSS142, ZONE "C" FORWARD OF REAR SPAR, SKIN CRACKED. REPAIRED R/H LOWER H-STAB SKIN. SSTA 147.9 ZONE "C" FWD OF REAR SPAR IAW BOEING SB 737-55-1059 FIG. 4 REV. 1 DATED APRIL 6, 2016.
- [SDR NACA2020010800166](https://openairdocs.org/sdr/NACA2020010800166.md): Skin · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Horizontal Stabilizer, Plate/Skin
  > LEFT HAND HORIZONTAL STABILIZER UPPER SKIN BLISTERED @ AFT SPAR @ ES149. REPAIRED LH H-STAB UPR SKIN @ AFT SPAR @ ELEV STA 149 IAW SR# 4-4652338756, WITHOUT DEVIATION.
- [SDR NACA2019122400165](https://openairdocs.org/sdr/NACA2019122400165.md): Support Fitting · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Wing, Landing Gear Attach Fittings
  > LEFT HAND MAIN LANDING GEAR SUPPORT FITTING, #5 HOLE IS CRACKED IN 2 PLACES. DETERMINE WHICH LAYER CRACK IS IN. SDR STILL OPEN FOR FINAL FIX.
- [SDR NACA2019122400164](https://openairdocs.org/sdr/NACA2019122400164.md): Support Fitting · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Wing, Landing Gear Attach Fittings
  > RIGHT HAND MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING 2 CRACKS FOUND, MOST INBOARD UPPER 2 HOLES (MARKED ON AIRCRAFT). REPAIRED 2 CRACKS FOUND DURING RH MLG BEAM FWD FITTING INSPECTION IAW BOEING SR#4-4628443870. SEE FAA FORM 8100-9 FOR APPROVAL. RII D
- [SDR NACA2020010800163](https://openairdocs.org/sdr/NACA2020010800163.md): Spar · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Wing Spar
  > FRONT SPAR LEFT HAND UPPER WING SURFACE WS246 CORROSION. L/H UPPER WING SURFACE W.S. 246, FRONT SPAR, REPAIRED IAW BOEING SERVICE REQUEST 4-4649225247, SEE 8100-9 FOR FINAL APPROVAL.
- [SDR NACA2019122400162](https://openairdocs.org/sdr/NACA2019122400162.md): Structure · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > POSSIBLE CRACK BS290 S11R - S12R, RIGHT HAND ON OUTER CHORD. REPLACED CRACKED OUTER CHORD AT STA 290 STR 11-12 RH WITH PART NUMBER 65-45807-31 IAW BOEING DWG #65-45807 REV K.
- [SDR NACA2019122400161](https://openairdocs.org/sdr/NACA2019122400161.md): Intercostal · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS867 - BS887 RBL22.5 INTERCOSTAL CRACKED. REPLACED CRACKED INTERCOSTAL AT STA 867-887 RBL 22.5 IAW B737-400 SRM 51-40-02 REV 103. PN INFO NEEDED, STILL OPEN
- [SDR NACA2019122400160](https://openairdocs.org/sdr/NACA2019122400160.md): Structure · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS727 S18A RIGHT HAND CRACK CONFIRMED IN CHORD. REMOVE AND REPLACE IAW BOEING SB737-53-1088 REV 1 AND BOEING DWG 65C33722. REMOVED AND REPLACED CHORD AT STA 727, RH SIDE, STRINGER 17- 26R IAW BOEING SERVICE BULLETIN 737-53-1088 REV 1, DATED MAY 25, 2006 AND B
- [SDR NACA2020010800159](https://openairdocs.org/sdr/NACA2020010800159.md): Structure · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS727 S18A LEFT HAND CRACK CONFIRMED IN CHORD. REMOVE AND REPLACE IAW BOEING SB737-53-1088 REV 1 AND BOEING DWG 65C33722. REMOVED AND REPLACED CHORD AT STA 727, LH SIDE, STRINGER 17- 26L IAW BOEING SERVICE BULLETIN 737-53-1088 REV 1, DATED MAY 25, 2006 AND BOE
- [SDR NACA2019122400158](https://openairdocs.org/sdr/NACA2019122400158.md): Stop Fitting · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Main, Structure
  > AD2018-18-03 REVEALED CRACKED #5 DOOR STOP FITTING ON FORWARD AIRSTAIR DOOR. RE&RE DOOR, REPLACE STOP FITTING, RIG DOOR & STOPS IAW SB737-53A1370 APPENDIX A. DATED DEC 13, 2017. ORIGINAL ISSUE. NEED PART INFO, STILL OPEN
- [SDR NACA2019122400157](https://openairdocs.org/sdr/NACA2019122400157.md): Fitting · cracked · Dec 24, 2019 · N401YK · Boeing 737436 · Engine Mount Section
  > LEFT HAND ENGINE REAR ENGINE MOUNT HANGAR FITTING HAS PITTING CORROSION IN CONE BOLT MATING SURFACE. REPLACED #1 ENGINE REAR MOUNT HANGAR FITTING IAW B737-400 AMM 71-21-03 REV 90. SEE NDT REPORT NDT19-5645 FOR HANGAR BOLT INSPECTION. NO CRACKS FOUND. NEEDS PA
- [SDR NACA2019123024156](https://openairdocs.org/sdr/NACA2019123024156.md): Support · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS 867 - 930, RBL21 SUPPORT ZEE WAS CORRODED AT VARIOUS PLACES, UPPER AND LOWER SIDE IN THE AFT CARGO BAY. BLENDED CORROSION IAW SRM 51-10-02 PAR.14, REV 103. NOMINAL MATERIAL THICKNESS WAS.040" IAW SRM 53-60-53 DETAIL 1, FIGURE 1, REV 103. MINIMUM REMAININ
- [SDR NACA2019123024155](https://openairdocs.org/sdr/NACA2019123024155.md): Channel · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS 927 - 947, RBL 13.8 IN THE AFT CARGO BAY, THE FLOOR CHANNEL WAS CORRODED AT VARIOUS PLACES. REPLACED THE CHANNEL IAW SRM REV 103, 51-10-02, PARA 8 AND 65-46592, REV A.
- [SDR NACA2019123024154](https://openairdocs.org/sdr/NACA2019123024154.md): Channel · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS 727A + 5.0 RBL3.0 AFT CARGO FLOOR CHANNEL CORRODED. REPAIRED THE CHANNEL IAW SRM 53-00-53, REV 103.
- [SDR NACA2019123024153](https://openairdocs.org/sdr/NACA2019123024153.md): Channel · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Fuselage Miscellaneous Structure
  > BS 727F + 5, RBL 8.1, AFT CARGO FLOOR CHANNEL CORRODED. THE CHANNEL WAS BLENDED IAW SRM 51-10-02, PARAGRAPH 14, REV 103. ORIGINAL MATERIAL THICKNESS 0.080" IAW SRM 53-60-53 REV 103. THICKNESS REMOVED 0.036", THICKNESS REMAINING 0.042", THE CHANNEL WAS FOUN
- [SDR NACA2109123024152](https://openairdocs.org/sdr/NACA2109123024152.md): Bolt · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Trailing Edge Flaps
  > LEFT WING OUTBOARD FLAP OUTBOARD GIMBAL BUSHING RETENTION BOLT CORRODED. REPLACED THE LEFT WING OUTBD FLAP OUTBAORD GIMBAL BUSHING AND RETENTION BOLT IAW AMM 27-51-37 REV 90.
- [SDR NACA2019123024151](https://openairdocs.org/sdr/NACA2019123024151.md): Bushing · worn · Dec 24, 2019 · N401YK · Boeing 737436 · Trailing Edge Flaps
  > LEFT WING OUTBOARD FLAP, OUTBOARD FOREFLAP SEQUENCE CARRIAGE HARDWARE WAS CORRODED AND BUSHINGS WORN. THE HARDWARE & BUSHINGS WERE REPLACED IAW AMM 27- 51-37 C (2) (A), REV 90.
- [SDR NACA2019123040150](https://openairdocs.org/sdr/NACA2019123040150.md): Access Panel · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Horizontal Stabilizer, Plate/Skin
  > RIGHT HORIZONTAL STABILIZER LOWER SURFACE ACCESS PANEL 9222R AT HSS 56.01 WAS CORRODED UNDER AND AROUND ANCHOR NUTS. REPLACED THE ACCESS PANEL IAW SRM 51-30-01, REV 104. AND DWG 6553746, REV H.
- [SDR NACA2019123040149](https://openairdocs.org/sdr/NACA2019123040149.md): Panel · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Vertical Stabilizer, Plate/Skin
  > LEFT VERTICAL STABILIZER PANEL 9566L CORRODED ON LOWER SURFACE. REPLACED THE PANEL IAW SRM 51-30-01 REV 104, AND SRM 51-40-02 REV 104.
- [SDR NACA2019123040148](https://openairdocs.org/sdr/NACA2019123040148.md): Strap · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Horizontal Stabilizer Structure
  > RIGHT HORIZONTAL STABILIZER PANEL 9223R MACHINED STRAP WAS CORRODED ON BOTTOM OF PANEL. REPLACED THE STRAP IAW DWG 65-53746, REV N, AND SRM 51-40-02, REV 104.
- [SDR NACA2019122400147](https://openairdocs.org/sdr/NACA2019122400147.md): Skin · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Wing, Plate/Skin
  > WS150 STRINGER 13 LEFT HAND WING UPPER SURFACE HAS SURFACE CORROSION. L/H UPPER WING SURFACE REPAIRED @ WS 150-112, STR 13U-15U IAW BOEING SERVICE REQUEST 4-4649225247, SEE 8100-9 FOR FINAL APPROVAL
- [SDR NACA2019123040146](https://openairdocs.org/sdr/NACA2019123040146.md): Skin · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Wing, Plate/Skin
  > WS271, STRINGER 13 LEFT HAND WING UPPER SURFACE HAS SURFACE CORROSION. LEFT HAND WING UPPER SURFACE, WS 232 STR 13, REPAIRED IAW BOEING SERVICE REQUEST 4-4649225247, SEE 8100-9 FOR FINAL APPROVAL
- [SDR NACA2019123040145](https://openairdocs.org/sdr/NACA2019123040145.md): Door · corroded · Dec 24, 2019 · N401YK · Boeing 737436 · Fluid Service Doors
  > AFT PORTABLE WATER DOOR SHOWS EVIDENCE OF CORROSION. REPLACED AFT TOILET SERVICE DOOR WITH NEW IAW AMM 52-49-07, REV 90. BONDING CHECK SERVICEABLE.
- [SDR NACA201903270031](https://openairdocs.org/sdr/NACA201903270031.md): Warning System · false activation · Mar 25, 2019 · N401YK · Boeing 737436 · Fire Detection
  > FIRE WARNING, MASTER CAUTION LIGHT & BELL ACTIVATED FOR APPROXIMATELY 1 SECOND THEN SELF CLEARED. FIRE WARN/MASTER CAUTION LIGHT & BELL ACTIVATED UNTIL CANCELLED. UPON RECALL, FIRE WARN REMAINS OFF, MASTER CAUTION ILLUMINATES. PERFORMED AMM 26-11-00 ON THE EN

## 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 = 'N401YK' AND deregistration_id = 'N401YK-2026-10-06'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/deregistered/N401YK-2026-10-06/reports

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