# Service difficulty reports: Boeing 737-436

A list on [Boeing 737-436](https://openairdocs.org/model/boeing-737-436.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 8 · 390 reports

- [SDR TSAA2026092800003](https://openairdocs.org/sdr/TSAA2026092800003.md): Slide · unwanted deploy · Sep 28, 2026 · N405YK · Boeing 737436 · Emergency Equipment
  > SLIDE DEPLOYED INADVERTENTLY
- [SDR K11A2026092400392](https://openairdocs.org/sdr/K11A2026092400392.md): Control Panel · failed · Sep 24, 2026 · N733CK · Boeing 737436 · Cabin Pressure Control System
  > PRESSURIZATION FAIL DURING DESCENT, MANUAL MODE DID NOT WORK. REMOVED AND REPLACED PRESSURE CONTROL MODULE IAW AMM 21-31-25, OPS CHECK PERFORMED IAW AMM 21-31-00/205 OPS CHECK GOOD NO DEFECTS NOTED, REF LP 737-004-8615 ITEM #2. PERFORMED CABIN PRESSURIZATION
- [SDR K11A2026090400389](https://openairdocs.org/sdr/K11A2026090400389.md): Fmc · faulted · Sep 4, 2026 · N733CK · Boeing 737436 · Flight Management Computing Hardware System
  > BOTH FMC'S FAILED IN FLIGHT AND BECAME OPERATIONAL APPROXIMATELY AFTER ONE MINUTE. REMOVED AND REINSTALLED FMC COMPUTERS IAW MM 34-62-21, OPS CHECK GOOD. NO DEFECTS NOTED
- [SDR 2026FA0000569](https://openairdocs.org/sdr/2026FA0000569.md): Adc · no test · Jun 23, 2026 · N853AT · Boeing 737436 · Air Data Computer
  > RIGHT ADC SELF TEST FAILED AMM 34-12-11 REV 103 - 25-MAR-2026. ADC WAS REPLACED AND OPERATIONAL TEST WAS PERFORMED BY AMM 34-12-01 REV. 103 - 25-MAR-2026. AIR DATA SYSTEM TEST WAS PERFORMED AMM 34-12-01 REV. 103 - 25-MAR-2026. THE EVENT OCCURRED ON 23TH JUNE
- [SDR NACA2026062200001](https://openairdocs.org/sdr/NACA2026062200001.md): Outflow Valve · failed · Jun 22, 2026 · N409YK · Boeing 737436 · Pressure Regulator/Outflow Valve
  > CABIN ALT WARNING IN CRUISE. UNCONTROLLABLE IN AUTO OR STANDBY. WAS CONTROLLABLE IN MANUAL MODE. CR FLT 320 FOR ABOUT 30 MINS. REMOVED AND REPLACED CABIN PRESS OUTFLOW VALVE, OPS CHECK GOOD REF B737-400 AMM 21-31-11
- [SDR NACA2026050400001](https://openairdocs.org/sdr/NACA2026050400001.md): Slide · unwanted deploy · May 4, 2026 · N409YK · Boeing 737436 · Escape Slide
  > L1 DOOR SLIDE DEPLOYED (INADVERTENT, HUMAN ERROR). REMOVED AND REPLACED L1 DOOR SLIDE ASSY REF AMM 25-61-35-402-003
- [SDR TSAA2026042400002](https://openairdocs.org/sdr/TSAA2026042400002.md): Symbol Generator · failed · Apr 24, 2026 · N405YK · Boeing 737436 · Navigation System
  > CAPTAINS SIDE EFIS DISPLAYS WENT BLANK. NR 1 SG FAILED.
- [SDR K11A2026042200377](https://openairdocs.org/sdr/K11A2026042200377.md): Door · unsecure · Apr 22, 2026 · N733CK · Boeing 737436 · Cargo/Baggage Doors
  > REJECTED TAKE OFF AT 60 KNOTS, AFT CARGO DOOR LIGHT INDICATED OPEN. RESECURED AFT CARGO DOOR IAW B737-345 AMM 52-31-00, NO DEFECTS NOTED. PERFORMED HIGH ENERGY STOP CONDITIONAL INSPECTION IAW B737-345 AMM 05-51-07, NO DEFECTS NOTED
- [SDR K11A2026033100375](https://openairdocs.org/sdr/K11A2026033100375.md): Door · missing · Mar 31, 2026 · N733CK · Boeing 737436 · Wing, Plate/Skin
  > DURING WALKAROUND FOUND RH FUEL BOOST PUMP DOOR MISSING. TRANSFERRED TO DMI #73300134, CAT D, DUE 7/29/26 IAW B737 KC2 MEL CDL REF 57-30-4, SPECIAL PROCEDURES DCL 57-30-04 COMPLIED WITH PLACARDS INSTALLED. PERFORMED GROUND HANDLING HITS AIRPLANE OR PART DEPAR
- [SDR K11A2026031700374](https://openairdocs.org/sdr/K11A2026031700374.md): Battery Pack · inoperative · Mar 17, 2026 · N405CK · Boeing 737436 · Emergency Lighting
  > DURING T/S FOUND L1 DOOR AND FLIGHT DECK ENTRY DOOR EMERGENCY LIGHTS INOP. REMOVED AND REPLACED LEFT HAND EMERGENCY LIGHT BATTERY PACK IAW B737 AMM 33-51-51 OPS CHECK GOOD
- [SDR TSAA2026030900001](https://openairdocs.org/sdr/TSAA2026030900001.md): Symbol Generator · failed · Mar 7, 2026 · N405YK · Boeing 737436 · Navigation System
  > NR 1 SYMBOL GENERATOR FAILED.
- [SDR 2026F00007](https://openairdocs.org/sdr/2026F00007.md): Cabin Pressure · faulted · Feb 2, 2026 · N853AT · Boeing 737436 · Cabin Pressure Control System
  > AFTER TAKEOFF, THE AIRCRAFT DOES NOT PRESSURIZE, IT IS NECESSARY TO RETURN TO PDA
- [SDR K11A2026012900367](https://openairdocs.org/sdr/K11A2026012900367.md): Pump · power loss · Jan 29, 2026 · N733CK · Boeing 737436 · Fuel Boost Pump
  > WITH PUMPS ON, FUEL PUMPS TO CENTER TANK LOST OF ELECTRICAL POWER ON CLIMB OUT. PERFORMED AC GENERATION SYSTEM TEST IAW AMM 24-21-00. OPS CHECK PASS WITH NO DEFECTS NOTED. REF BLOCK 2 OF LP 737-004-1877 FOR CENTER TANK FUEL QUANTITY INDICATION ERROR. CENTER T
- [SDR NACA2026011920001](https://openairdocs.org/sdr/NACA2026011920001.md): Skin · ground damage · Dec 15, 2025 · N407YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > LEFT AFT FUSELAGE APPROX STA 927 TO 947 STRINGER 22 TO 25 L DAMAGED BY WIND BLOWN GSE. ACCOMPLISHED IAW AWATS EO 25-737-53-01 NAC EO 737 53-0438
- [SDR K11A2025102200356](https://openairdocs.org/sdr/K11A2025102200356.md): Seat Track · corroded · Oct 9, 2025 · N734CK · Boeing 737436 · Fuselage, Seat/Cargo Attach Fittings
  > MAIN DECK SEAT TRACK AT STA 887 - 986.5 RBL 43.5 CORRODED
- [SDR TSAA202510020002](https://openairdocs.org/sdr/TSAA202510020002.md): Skin · cracked · Sep 9, 2025 · N405YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > CRACK FOUND AT BS 7270+13 BELOW; STR 23L APPRX 1.75"LONG. CORRECTIVE: 8110 RECEIVED FOR IAW EO 737-53-0407
- [SDR K11A2025121500363](https://openairdocs.org/sdr/K11A2025121500363.md): Skin · cracked · Sep 5, 2025 · N734CK · Boeing 737436 · Fuselage Main, Plate/Skin
  > REPLACED FUSELAGE SKIN AT STA 907 - 1016, S14R - 20R.
- [SDR NACA2025081000002](https://openairdocs.org/sdr/NACA2025081000002.md): Iru · failed · Aug 10, 2025 · N405YK · Boeing 737436 · Inertial Guidance System
  > NUMBER 1 IRU FAULT ILLUMINATED, IRU FAILED. REMOVED AND REPLACED NR 1 IRU IAW AMM 34-28-31, OPS CHECK GOOD.
- [SDR NACA2025052500006](https://openairdocs.org/sdr/NACA2025052500006.md): Bracket · cracked · May 25, 2025 · N409YK · Boeing 737436 · Wing Miscellaneous Structure
  > RH FIXED TRAILING EDGE UPPER INBOARD PANEL ANGLE BRACKET CRACKED. STOP DRILLED CRACK. FAB DBLR 15-5.050 HEAT TREATED ROCKWELL @33. PRIMED INSTALLED ANGLES REF B737 SRM 57-51-90 AND EO 737-53-00003
- [SDR NACA2025052500005](https://openairdocs.org/sdr/NACA2025052500005.md): Bracket · cracked · May 25, 2025 · N409YK · Boeing 737436 · Wing Miscellaneous Structure
  > LH FIXED TRAILING EDGE UPPER INBD PANEL ANGLE BRACKET CRACKED. STOP DRILLED END OF CRACK. FABRICATED CBER 15-5 050 FOR HEAT TREAT - ROCKWELL TEST @33. PRIMED AND INSTALLED REF B737-400 SRM 51-51-90 AND EO 737-00003
- [SDR NACA2025051900001](https://openairdocs.org/sdr/NACA2025051900001.md): Skin · cracked · May 19, 2025 · N407YK · Boeing 737436 · Elevator, Tab Structure
  > RH ELEVATOR TAB LE SKIN CRACK APPROX 1" LENGTH OB OF HINGE 1 OPENING. REMOVED AND REPLACED RH ELEVATOR TAB ASSY REF 737 AMM 27-31-31
- [SDR K11A2025051100319](https://openairdocs.org/sdr/K11A2025051100319.md): Battery Pack · inoperative · May 11, 2025 · Boeing 737436 · Emergency Lighting
  > PROBLEM DESCRIPTION: R1 DOOR EMERGENCY EXIT LIGHT INOP. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: R&R R/H EMERGENCY LIGHT BATTERY PACK OPS CHECK GOOD IAW B737 AMM 33-51-51, NO DEFECTS NOTED, THIS CLEARS DMI 73300123, ALL PLACARDS REMOVED
- [SDR K11A2025042500315](https://openairdocs.org/sdr/K11A2025042500315.md): Warning Light · illuminated · Apr 25, 2025 · N405CK · Boeing 737436 · Door Warning System
  > ON THE RUNWAY CLEARED FOR TAKE-OFF, PER TAKE-OFF, AIRCRAFT WAS NOT MOVING, THROTTLE WAS NOT ADVANCING. CARGO DOOR ARMED LIGHT ILLUMINATED, REJECTED THE TAKE-OFF AND ADVISED TOWER NEEDED TO EXIT RUNWAY. WHEN EXCITED THE RUNWAY AND SET THE PARKING BRAKE THE LIGH
- [SDR NACA2025031800001](https://openairdocs.org/sdr/NACA2025031800001.md): Outflow Valve · faulted · Mar 18, 2025 · N405YK · Boeing 737436 · Pressure Regulator/Outflow Valve
  > CABIN ALTITUDE UNCONTROLLABLE IN STBY MODE. CABIN ALTITUDE 10,000 AT FL220. CABIN ALTITUDE CONTROLLABLE AFTER DESCENT INITIATED TO 10,000 FEET. REPLACED FWD OUTFLOW VALVE, ALSO FOUND CLAMP ON RH HEAT EXCHANGER BROKEN AND REPAIRED. OPS AND PRESSURE CHECK NORMAL
- [SDR K11A2025021700298](https://openairdocs.org/sdr/K11A2025021700298.md): Selector · out of position · Feb 17, 2025 · N733CK · Boeing 737436 · Central Warning
  > TAKEOFF WARNING HORN SOUNDED DURING TAKEOFF ROLL AT 30 KNOTTS. FOUND SPEED BRAKE OUT OF DETENT, PUT SPEED BRAKE INTO DETENT AND PERFORMED AURAL WARNING OPERATION TEST IAW B737 AMM 31-26-00, OPS CHECK GOOD NO DEFECTS NOTED.
- [SDR K11A2025030600302](https://openairdocs.org/sdr/K11A2025030600302.md): Landing · corroded · Jan 26, 2025 · N405CK · Boeing 737436 · Fuselage Main, Bulkhead
  > FUSELAGE FWD ACCESS DOOR CUTOUT AFT BULKHEAD STA 227.5 RBL 3 LOWER CHORD HAS EVIDENCE OF CORROSION.
- [SDR K11A2025030300300](https://openairdocs.org/sdr/K11A2025030300300.md): Intercostal · corroded · Jan 26, 2025 · N405CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > INTERCOSTAL IN FORWARD ACCESS DOOR SURROUND AT STA 222 - 227.8 BL0 HAS EVIDENCE OF CORROSION.
- [SDR K11A2025032700306](https://openairdocs.org/sdr/K11A2025032700306.md): Floor Support · damaged · Jan 22, 2025 · N405CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > AFT PIT FLOOR SUPPORT DAMAGED AT STA 727F LBL 18".
- [SDR K11A2025032700305](https://openairdocs.org/sdr/K11A2025032700305.md): Frame · damaged · Jan 21, 2025 · N405CK · Boeing 737436 · Fuselage Main, Frame
  > E/E BAY BILGE FRAME AT STA 360 AND APPROX BETWEEN STRINGERS S28R TO S29R DAMAGED WHERE FRAME MEETS FUSELAGE SKIN.
- [SDR K11A2025031100303](https://openairdocs.org/sdr/K11A2025031100303.md): Floor Support · damaged · Jan 20, 2025 · N405CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > FWD CARGO BILDGE LT C-TRACK DAMAGED AT STA 500C BL-S-26
- [SDR K11A2025030400301](https://openairdocs.org/sdr/K11A2025030400301.md): Floor Support · corroded · Jan 17, 2025 · N405CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > AFT PIT STA 945 RBL 14" FLOOR SUPPORT HAS EVIDENCE OF CORROSION.
- [SDR K11A2025040200310](https://openairdocs.org/sdr/K11A2025040200310.md): Attach Angle · corroded · Jan 12, 2025 · N734CK · Boeing 737436 · Fuselage Main, Attach Fittings
  > EVIDENCE OF CORROSION ON FRAME ATTACH ANGLE AT STA 500 BETWEEN STRINGER 27R AND 26R.
- [SDR K11A2024121200295](https://openairdocs.org/sdr/K11A2024121200295.md): Anti-Ice Valve · inoperative · Dec 12, 2024 · N405CK · Boeing 737436 · Airfoil Anti/De-ice System
  > RIGHT VALVE OPEN, THERMAL ANTI-ICE VALVE REMAINS ON IN FLIGHT, SWITCH IN OFF POSITION. REMOVED AND REPLACED RIGHT WING ANTI-ICE SHUTOFF VALVE IAW B737 AMM 30-11-11, OPS CHECK GOOD NO DEFECTS NOTED.
- [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 K11A2024101700289](https://openairdocs.org/sdr/K11A2024101700289.md): Regulator · inoperative · Oct 17, 2024 · N733CK · Boeing 737436 · Cabin Pressure Control System
  > THE AIRCRAFT WOULD NOT PRESSURIZE. THE NUMBER ONE BLEED VALVE INDICATED 3 PSI. R&R #1 ENGINE BLEED AIR PRESSURE REGULATOR IAW B737 AMM 36-11-16, OPS CHECK GOOD. BLEED AIR SYSTEM LEAK CHECK GOOD IAW B737 AMM 36-11-05, PERFORMED ENGINE RUN TO IDLE, OPS CHECK G
- [SDR NACA2024091300001](https://openairdocs.org/sdr/NACA2024091300001.md): Blowout Panel · blown · Sep 13, 2024 · N407YK · Boeing 737436 · Fuselage Main, Structure
  > AT 37000 FT IN CRUISE, CABIN ALTITUDE CLIMBED RAPIDLY AND EXCEEDED 20,000 FEET. FOLLOWED QRH, CABIN WAS NOT CONTROLLABLE IN MAN AC W/ VALVE CLOSED INDICATION. AIRCRAFT RETURNED TO PAOM. PERFORMED CABIN DEPRESSURIZATION CONDITIONAL INSPECTION IAW AMM 05-51-081
- [SDR NACA2024082700001](https://openairdocs.org/sdr/NACA2024082700001.md): Skin · cracked · Aug 27, 2024 · N403YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > WHILE PERFORMING A DVI FOR AN UNRELATED EO, FOUND A 7/8 INCH FUSELAGE SKIN CRACK BELOW STR 22L AND BS 7278+2 3/8, CONFIRMED WITH EDDY CURRENT. ACCOMPLISHED EO 737-53-0360, REFERENCE ATTACHED PROJECT WORKSHEET.
- [SDR K11A2024082800280](https://openairdocs.org/sdr/K11A2024082800280.md): Support · cracked · Aug 19, 2024 · N733CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > FWD PIT STATION APPRX 520 RBL APPRX 8 FRAME SUPPORT CRACKED.
- [SDR K11A2024091300284](https://openairdocs.org/sdr/K11A2024091300284.md): Frame · cracked · Aug 16, 2024 · N733CK · Boeing 737436 · Fuselage Main, Frame
  > AT STA 344 FRAME FOUND CRACKED BETWEEN S-22L AND S-23L AT 1 INCH HYDRAULIC LINE HOLE
- [SDR K11A2024090500281](https://openairdocs.org/sdr/K11A2024090500281.md): Floor Support · corroded · Aug 13, 2024 · N733CK · Boeing 737436 · Fuselage Miscellaneous Structure
  > FWD PIT FLOOR SUPPORT HAS CORROSION AT STA 540 RBL 16
- [SDR K11A2024081300277](https://openairdocs.org/sdr/K11A2024081300277.md): Sensor · out of limits · Aug 13, 2024 · N734CK · Boeing 737436 · Flight Control System
  > DURING CLIMB SOON AFTER REACHING 1000 FT CLIMB AGL FEEL DIFF PRESS AND SPEED TRIM FAIL ANNUNCIATOR LIGHTS ILLUMINATED, ELEVATOR CONTROL WAS MARGINALLY HEAVY, AND AUTO PILOT WOULD NOT MAINTAIN PITCH CONTROL.: R&R ELEVATOR FEEL COMPUTER IAW B737 AMM 22-31-37 PA
- [SDR K11A2024090500282](https://openairdocs.org/sdr/K11A2024090500282.md): Door Frame · cracked · Aug 7, 2024 · N733CK · Boeing 737436 · Fuselage Main, Structure
  > FOUND CRACK INDICATION AT L-1 DOOR S-16 DOOR STOP LOWER FASTENER ROW MIDDLE HOLE.
- [SDR NACA2024071700006](https://openairdocs.org/sdr/NACA2024071700006.md): Skin · corroded · Jul 17, 2024 · N405YK · Boeing 737436 · Wing, Plate/Skin
  > DURING NRC CA1559/473 CORRECTIVE ACTION REMOVE WING TIP SKIN FOUND CORROSION AT RH WING TIP FAIRING PANEL LOWER SKIN. REPAIRED CORROSION IAW EO 737-57-0046
- [SDR NACA2024071700005](https://openairdocs.org/sdr/NACA2024071700005.md): Skin · corroded · Jul 17, 2024 · N405YK · Boeing 737436 · Wing, Plate/Skin
  > DURING NRC CA1559/473 CORRECTIVE ACTION REMOVE WING TIP SKIN FOUND CORROSION AT RH WING CLOSURE RIB ASSY LOWER HORIZONTAL FLANGE WBL560. REPAIRE CORROSION IAW EO 737-57-0045
- [SDR NACA2024071700004](https://openairdocs.org/sdr/NACA2024071700004.md): Cargo Track · corroded · Jul 17, 2024 · N405YK · Boeing 737436 · Fuselage, Seat/Cargo Attach Fittings
  > MAIN DECK CARGO LATERAL TRACK GOT CORROSION, STA727R, 727AR, 727FR, 727GR. REPLACED TRACK IAW SRM 51-40-02
- [SDR NACA2024071700002](https://openairdocs.org/sdr/NACA2024071700002.md): Skin · corroded · Jul 17, 2024 · N405YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > SURFACE CORROSION ON FUSELAGE EXTERNAL SKIN (AFT LAVATORY ACCESS PANEL1502 R L/E SIDE) BETWEEN BS998 AND BS1006 FROM S24R TO S25R. REPLACED ACCESS PANEL IAW AMM 52-49-6
- [SDR K11A2024071600269](https://openairdocs.org/sdr/K11A2024071600269.md): Flap System · faulted · Jul 16, 2024 · N734CK · Boeing 737436 · Leading Edge Slat Control System
  > PROBLEM DESCRIPTION: TRAILING EDGE FLAP ASYMMETRY LEFT FLAP INDICATE UP & RIGHT FLAP INDICATES L1, SLATS DID NOT EXTEND WHEN FLAP HANDLE WAS MOVED TO #1 DETENT. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: FOUND #3 FLAP TRANSMISSION TORQUE TUBE COUPLING DI
- [SDR NACA2024071200006](https://openairdocs.org/sdr/NACA2024071200006.md): Pressure Blkhd · cracked · Jul 12, 2024 · N405YK · Boeing 737436 · Fuselage Main, Bulkhead
  > MWW PRESSURE BULKHEAD GOT CRACK ABOUT 0.375", STA 663.75 LBL25+16", IN MAIN DECK CARGO COMP'T. REPAIRE CRACK IAW NAC EO 737-57-0356
- [SDR NACA2024071200005](https://openairdocs.org/sdr/NACA2024071200005.md): Pressure Blkhd · cracked · Jul 12, 2024 · N405YK · Boeing 737436 · Fuselage Main, Bulkhead
  > MWW PRESSURE BULKHEAD GOT CRACK ABOUT 1.5" 2 LOCATIONS, STA 663.75 LBL30, IN MAIN DECK CARGO COMP'T. REPAIRED CRACK IAW NAC EO 737-57-0356
- [SDR NACA2024071200004](https://openairdocs.org/sdr/NACA2024071200004.md): Skin · corroded · Jul 12, 2024 · N405YK · Boeing 737436 · Fuselage Main, Plate/Skin
  > SURFACE CORROSION ON AFT CARGO DOOR LOWER AND AFT CUT OUT CORNER SKIN UNDER AFT SCUFF PLATE AT BS847 BETWEEN S23R AND S24R. REPAIRED CORROSION IAW SRM 53-60-01

Next page: https://openairdocs.org/model/boeing-737-436/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 = '737436'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/boeing-737-436/reports

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