# Service difficulty reports: Boeing 737-4Q8

A list on [Boeing 737-4Q8](https://openairdocs.org/model/boeing-737-4q8.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 125 · 6,249 reports

- [SDR K11A2026090400388](https://openairdocs.org/sdr/K11A2026090400388.md): Controller · failed · Sep 4, 2026 · N403CK · Boeing 7374Q8 · Cabin Pressure Control System
  > AUTO FAIL LIGHT ON IN AIR, CABIN ALT NOT CONTROLLABLE IN MANUAL MODE. REMOVED AND REPLACED PRESSURE CONTROLLER IAW AMM 21-31-21. CONTROLLER OPS CHECK PERFORMED IAW AMM 21-31-00 OPS TEST GOOD PERFORMED CABIN PRESSURE LEAK TEST IAW AMM 05-51-91, OPS CHECK GOO
- [SDR 2026FA0000070](https://openairdocs.org/sdr/2026FA0000070.md): Power Supply · inoperative · Jan 31, 2026 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > R/H MID TO AFT EMERGENCY LIGHT POWER SUPPLY INOP
- [SDR 2026FA0000069](https://openairdocs.org/sdr/2026FA0000069.md): Power Supply · inoperative · Jan 31, 2026 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > R/H MID TO AFT EMERGENCY LIGHT POWER SUPPLY INOP
- [SDR K11A2025120300362](https://openairdocs.org/sdr/K11A2025120300362.md): Oil System · leaking · Dec 3, 2025 · N403CK · Boeing 7374Q8 · Turbine Engine Oil System
  > AFTER FURTHER INVESTIGATION OIL WAS FOUND AROUND AND IN NR 1 ENGINE INLET COWL AND BOOSTER MODULE. R&R ENGINE NR 1 IAW AMM 71-00-02. PERFORMED TEST 9 IAW AMM 71-00-00 ALL CHECKS GOOD NO DEFECTS NOTED AT THIS TIME. ENGINE: CFM563C1
- [SDR K11A2025120300361](https://openairdocs.org/sdr/K11A2025120300361.md): Control Panel · failed · Dec 2, 2025 · N403CK · Boeing 7374Q8 · Auto Flight System
  > MODE CONTROL PANEL FROZE IN FLIGHT, WITHOUT THE ABILITY TO CHANGE ANY MODE (COURSE) ALT, HLD, SPEED, N1, HDG SEL, LNAV, VNAV, FD MASTER SIDE. AUTO THROTTLE CONTINUED TO WORK. AUTO PILOT A OR B WOULD NOT ENGAGE. AFTER GROUND IDLING FOR 1.7 HR SUSPECT SMOKE IN C
- [SDR K11A2025120200361](https://openairdocs.org/sdr/K11A2025120200361.md): Control Panel · faulted · Dec 2, 2025 · N403CK · Boeing 7374Q8 · Navigation System
  > MODE CONTROL PANEL FROZE IN FLIGHT, WITHOUT THE ABILITY TO CHANGE ANY MODE (COURSE) ALT, HLD, SPEED, N1, HDG SEL, LNAV, VNAV, FD MASTER SIDE. AUTO THROTTLE CONTINUED TO WORK. AUTO PILOT A OR B WOULD NOT ENGAGE. AWAITING TROUBLESHOOTING. OPEN
- [SDR 2025F00278](https://openairdocs.org/sdr/2025F00278.md): A/C Pack · warning light · Dec 1, 2025 · N663FL · Boeing 7374Q8 · Cabin Cooling System
  > PACK LIGHT ILLUMINATED LEFT SIDE IAW AMM 21-61-83 PAGE 405 NR 4 ITEM B BITE INSTRUCTIONS TEST SATISFACTORILY.
- [SDR 2025F00276](https://openairdocs.org/sdr/2025F00276.md): Wire · damaged · Nov 26, 2025 · N663FL · Boeing 7374Q8 · Fuel System Wiring
  > DURING THE TAKEOFF ROLL, PRIOR TO REACHING 60 UNIDS THE RIGHT AFT TANK LOW PRESSURE LIGHT ILLUMINATED, THE TAKEOFF WAS DISCONTINUE. IAW SWPM 20-10-13 PAG 7-10 THE ELECTRICAL WIRE W518-301-18B WAS REPAIRED REFLECTED IN WDM 28-23-01 PAG 509-514 FUEL BOOST PUMP
- [SDR 2025FA0000789](https://openairdocs.org/sdr/2025FA0000789.md): Relay · unstable · Nov 26, 2025 · N663FL · Boeing 7374Q8 · Aircraft Fuel Distribution System
  > THE AFT FUEL PUMP ON THE TANK #2 LOW PRESSURE LIGHT ILLUMINATED. IAW AMM 28-22-41 PAG 501-506 GROUND FAULT INTERRUPTER RELAY "20" RESET WAS PERFORMED.
- [SDR K11A2025091600339](https://openairdocs.org/sdr/K11A2025091600339.md): Pump · faulted · Sep 16, 2025 · N403CK · Boeing 7374Q8 · Hydraulic Pump (Electric/Engine), Main
  > LOW PRESSURE HYDRAULIC LIGHT ILLUMINATED ON ELECTRIC PUMP #1, "B" SIDE. R AND R SYSTEM "B" EMDP IAW AMM 29-15-22, OPS AND LEAK CHECK GOOD IAW AMM 29-15-00.
- [SDR 4TXA202506070001](https://openairdocs.org/sdr/4TXA202506070001.md): Light · inoperative · May 14, 2025 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > LEFT FORWARD WING EMERGENCY EXIT EXTERIOR LIGHT INOP. SECURED CONTACTS AND REPLACED LAMPS
- [SDR K11A2024092300286](https://openairdocs.org/sdr/K11A2024092300286.md): Water Separator · faulted · Sep 23, 2024 · N403CK · Boeing 7374Q8 · Humidity Control System
  > AT 14500 FT AUTO FAIL AND STANDBY LIGHTS CAME ON. I CALLED FOR THE QRH, AS MY F.O. STARTED THE QRH FOR CABIN ALTITUDE LIGHT AND HORN CAME ON. I IMMEDIATELY STARTED A DECENT FROM 15000 FT TO 10000 FT, WE RAN THE QRH AND WAS NOT ABLE TO MAINTAIN CABIN ALTITUDE A
- [SDR K11A202406140263](https://openairdocs.org/sdr/K11A202406140263.md): Clamp · disconnected · Jun 17, 2024 · N403CK · Boeing 7374Q8 · Cabin Cooling System
  > LOST L/H PAC INFLIGHT. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: RESECURED L/H PACK CLAMP ON CONDENSER IAW B737 AMM 20-50-11 PRESSURIZED L/H AND R/H PACK SYSTEM IAW B 737 AMM 36-05-00. LEAK CHECK GOOD. PER GROUND OPERATIONAL CHECK OF L/H & R/H PACK S
- [SDR I5EA2024011600007](https://openairdocs.org/sdr/I5EA2024011600007.md): Power Supply · no test · Jan 16, 2024 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > MODULE M1137 REQUIRES REPLACEMENT. REMOVED AND REPLACED POWER SUPPLY MODULE M1137 AT STA. 975R AND TEST IAW B737-400 AMM 33-51-51. TEST OK.
- [SDR I5EA2024011600006](https://openairdocs.org/sdr/I5EA2024011600006.md): Battery Pack · no test · Jan 16, 2024 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > SEVERAL R/H AFT EMERGENCY AISLE LIGHT INOP. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY M1137 AT STA. 975R AND TEST IAW B737-400 AMM 33-51-51. TEST OK.
- [SDR I5EA2023090800003](https://openairdocs.org/sdr/I5EA2023090800003.md): Battery Pack · no test · Sep 8, 2023 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > AISLE LIGHT AT STA 500E + R INOP FOR EMERGENCY LIGHT. REMOVED AND REPLACED BATTERY PACK FOR AILSE LIGHT M1468 STA 500C + 10L IAW B737-400 AMM 33-51-51.
- [SDR I5EA2023081100019](https://openairdocs.org/sdr/I5EA2023081100019.md): Unknown · unknown · Aug 11, 2023 · N807TJ · Boeing 7374Q8 · Fuselage Main, Plate/Skin
  > FUSELAGE SKIN CRACK AT STA. 727E, STR 24R, REPAIRED FUSELAGE RH SKIN AT STA.727E, STR. 24R, IAW B737-400 SRM 53-00-01, REPAIR 31
- [SDR K11A2023071000218](https://openairdocs.org/sdr/K11A2023071000218.md): Unknown · unknown · Jul 10, 2023 · N403CK · Boeing 7374Q8 · Standard Practices/Structures
  > AIRCRAFT DOOR FAULTY INDICATION. CREW WAS ALERTED TO HIGH SOUND AIR FLOW AND A PRONOUNCED SOUND OF THE ENGINES.
- [SDR I5EA2023051600006](https://openairdocs.org/sdr/I5EA2023051600006.md): Module · no test · May 16, 2023 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > MODULE M1134 REQUIRES REPLACEMENT. REMOVE AND REPLACE MODULE M1134 AT STA. 634L IAW B737-400 AMM 33-51-51. OPS CHECK GOOD.
- [SDR I5EA2023051600005](https://openairdocs.org/sdr/I5EA2023051600005.md): Battery Pack · no test · May 16, 2023 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > OVERWING EMERGENCY EXIT LIGHT FOR HATCH INOP. REMOVED AND REPLACED BATTERY PACK AT M1134 AT STA. 634L IAW B737-400 AMM 33-51-51. OPS CHECK GOOD.
- [SDR K11A2023032400190](https://openairdocs.org/sdr/K11A2023032400190.md): Light · inoperative · Feb 15, 2023 · N129AC · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHTS INOP IN GALLEY AREA NEAR L1 DOOR.
- [SDR I5EA2023020600002](https://openairdocs.org/sdr/I5EA2023020600002.md): Battery Pack · inoperative · Feb 5, 2023 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHT INOP AT STA. 727A+17 BULLNOSE. REMOVED AND REPLACED EMERGENCY BATTERY BACK AT M1576 STA. 727A WITH SERVICEABLE UNIT IAW B737-400 AMM 33-51-51, TEST OK
- [SDR I5EA2023020200001](https://openairdocs.org/sdr/I5EA2023020200001.md): Battery Pack · no test · Feb 2, 2023 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > CENTER OVER WING ISLE R/H EMERGENCY LIGHT IS INOP. REMOVE AND REPLACED EMERGENCY LIGHT BATTERY PACK M1479 AT STA. 598R IAW B737-400 AMM 33-51-51. OPS CHECK GOOD.
- [SDR I5EA2022112800006](https://openairdocs.org/sdr/I5EA2022112800006.md): Battery Pack · inoperative · Nov 25, 2022 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > FOUND EMERGENCY LIGHTS INOPERATIVE, REMOVED AND REPLACED FIVE BATTERY PACKS IAW AMM 33-5-51, OPS CHECKED GOOD.
- [SDR I5EA2022110100002](https://openairdocs.org/sdr/I5EA2022110100002.md): Battery Pack · no test · Nov 1, 2022 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > FWD SERVICE LIGHT INOP. REMOVE AND REPLACE BATTERY PACK AT M1133 STA. 330L IAW B737-400 AMM 33-51-51. TEST GOOD.
- [SDR I5EA2022110100001](https://openairdocs.org/sdr/I5EA2022110100001.md): Battery Pack · no test · Nov 1, 2022 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY EXIT LIGHT INOP AT ROW 3 CLASS DIVIDERS. REMOVED AND REPLACE BATTERY PACK AT M1132 STA. 330R IAW B737-400 AMM 33-51-51. TEST GOOD.
- [SDR I5EA2022101700008](https://openairdocs.org/sdr/I5EA2022101700008.md): Battery Pack · discharged · Oct 14, 2022 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHT OUT AT OVERWING HATCH EXIT LIGHT RIGHT, REMOVED AND REPLACED EMERGENCY BATTERY WITH SERVICEABLE AT M1474, STA. 598R, IAW B737-400 AMM 33-51-51
- [SDR I5EA2022101400006](https://openairdocs.org/sdr/I5EA2022101400006.md): Power Supply · no test · Oct 13, 2022 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHT OUT OVERWING. REMOVED AND REPLAED EMERGENCY LIGHT POWER SUPPLY M1134, STA. 634L FOR LEFT OVERWING IAW B737 AMM 33-51-51, OPS CHECK GOOD
- [SDR I5EA2022101700007](https://openairdocs.org/sdr/I5EA2022101700007.md): Battery Pack · discharged · Oct 12, 2022 · N807TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHT OUT AISLE LIGHT RIGHT STA. 704R. REMOVED AND REPLACED BATTERY PACK FOR AISLE LIGHT AT M1435, STA. 747R, IAW B737-400 AMM 33-51-51
- [SDR K11A2022092000162](https://openairdocs.org/sdr/K11A2022092000162.md): Hose · damaged · Sep 20, 2022 · N129AC · Boeing 7374Q8 · Landing Gear System
  > PROBLEM DESCRIPTION: HYD SYSTEM A, LOW PRESSURE ON THE ENGINE HYD PUMP AND ELEC 2 PUMP LOW PRESSURE. HYD SYSTEM A ZERO IN RESERVOIR CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: FOUND GEAR UPLOCK HOSE DAMAGED, REMOVED HOSE AND INSTALLED TEMP FLEX LINE, LEAK
- [SDR K11A2022080900153](https://openairdocs.org/sdr/K11A2022080900153.md): Sensor · dirty · Aug 9, 2022 · N129AC · Boeing 7374Q8 · Nose/Tail Landing Gear
  > PROBLEM DESCRIPTION: NO GREEN INDICATION OF NOSE LANDING GEAR WHEN EXTENDED IN BNA, FOLLOWED LANDING GEAR ALTERNATE EXTENSION CHECKLIST, DECIDED TO DIVERT TO CVG, DURING APPROACH IN CVG FOUND CB (AIR/GROUND) RELAY POPPED. AFTER RUNNING CHECK LIST CREW WAS ABLE
- [SDR I5EA2022071500002](https://openairdocs.org/sdr/I5EA2022071500002.md): Battery Pack · no test · Jul 15, 2022 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY ISLE LIGHT INOP AT STA 607R. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK AT STA 500C + 10 IAW B737-400 AMM 33-51-514. TEST OK.
- [SDR K11A2022040600123](https://openairdocs.org/sdr/K11A2022040600123.md): Switch · none · Apr 6, 2022 · N129AC · Boeing 7374Q8 · Cargo/Baggage Doors
  > PROBLEM DESCRIPTION: MAIN CARGO DOOR WARNING LIGHT ILLUMINATED DURING CLIMB, HOOKS UNLATCHED LIGHT WAS ILLUMINATED ON CARGO DOOR CONTROL PANEL. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: ADJUSTED LATCH LOCK SWITCH IAW B737 AEI MM 52-33-01, OPS CHECK GOOD
- [SDR K11A2022011810110](https://openairdocs.org/sdr/K11A2022011810110.md): Seat Track · worn · Jan 11, 2022 · N403CK · Boeing 7374Q8 · Fuselage, Seat/Cargo Attach Fittings
  > 1ST OFFICER SEAT LOCKING HOLE WORN
- [SDR K11A2022011810109](https://openairdocs.org/sdr/K11A2022011810109.md): Seat Track · worn · Jan 11, 2022 · N403CK · Boeing 7374Q8 · Fuselage, Seat/Cargo Attach Fittings
  > CAPT'S SEAT TRACK LOCKING HOLE WORN
- [SDR I5EA2021111000002](https://openairdocs.org/sdr/I5EA2021111000002.md): Charger · none · Nov 10, 2021 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > FOUND BATTERY CHARGER INOP FOR EMERGENCY LIGHTS AT STA. 975 / M1137. REMOVED AND REPLACED BATTERY CHARGER AT M1137 / STA.975 IAW B737-400 AMM 33-51-51. OPS CHECK GOOD.
- [SDR I5EA2021111000001](https://openairdocs.org/sdr/I5EA2021111000001.md): Battery Pack · no test · Nov 10, 2021 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > RIGHT AFT CABIN EMERGENCY LIGHTS INOP. REMOVED AND REPLACED R/H AFT EMERGENCY LIGHT BATTERY AT M1137 / STA.975 IAW B737-400 AMM 33-51-51. OPS CHECK GOOD.
- [SDR I5EA2021081700012](https://openairdocs.org/sdr/I5EA2021081700012.md): Circuit Breaker · tripped · Aug 16, 2021 · N807TJ · Boeing 7374Q8 · Landing Gear System Wiring
  > LANDING GEAR WILL NOT MOVE TO THE UP POSITIOON AFTER TAKEOFF. DURING TROUBLESHOOT, FOUND CIRCUIT BREAKER (LATCH & PRESS WARN) POPPED OUT, RESET CIRCUIT BREAKER IAW B737 AMM 20-60-01. PERFORMED GEAR EXTENSION AND RETRACTION TEST IAW AMM 32-32-00, TEST NORMAL.
- [SDR I5EA2021032500011](https://openairdocs.org/sdr/I5EA2021032500011.md): Battery Pack · inoperative · Mar 25, 2021 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > RH OVER WING EMERGENCY LIGHT INOP. REPLACED EMERGENCY LIGHT BATTERY M1479 WITH SERVICEABLE UNIT AND TEST IAW B737-400 AMM 33-51-51.
- [SDR I5EA2021032500010](https://openairdocs.org/sdr/I5EA2021032500010.md): Charger · inoperative · Mar 25, 2021 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > EMERGENCY LIGHT BATTERY CHARGER INOP AT STA 625 M1479. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY CHARGER M1479 AND TEST IAW B737-400 AMM 33-51-51
- [SDR I5EA2021022200007](https://openairdocs.org/sdr/I5EA2021022200007.md): Charger · inoperative · Feb 21, 2021 · N808TJ · Boeing 7374Q8 · Emergency Lighting
  > BATTERY CHARGER INOP AT M1468, STA. 500C, STR 10L. REMOVED AND REPLACED BATTERY CHARGER M1468 AT STA. 500C, STR. 10L WITH SERVICEABLE UNIT AND TEST IAW B737-400 AMM 33-51-51, TESTS OK.
- [SDR I5EA2021011900006](https://openairdocs.org/sdr/I5EA2021011900006.md): Battery Pack · no test · Jan 19, 2021 · N309GT · Boeing 7374Q8 · Emergency Lighting
  > R1 EMERGENCY LIGHT INOPERABLE. REMOVED AND REPLACED BATTERY PACK M1674. OPERATIONS CHECK GOOD, IAW B737-400 AMM 33-51-02.
- [SDR I5EA2020120700002](https://openairdocs.org/sdr/I5EA2020120700002.md): Battery Pack · discharged · Dec 1, 2020 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > AFT CABIN RT SIDE EMERGENCY LIGHT INOPERABLE. REMOVED AND REPLACED EMERGENCY BATTERY POWER SUPPLY. PERFORMED OPERATIONS CHECK NORMAL, PER B737 AMM 33-51-02.
- [SDR I5EA2020101600006](https://openairdocs.org/sdr/I5EA2020101600006.md): Smoke Detector · false activation · Oct 16, 2020 · N309GT · Boeing 7374Q8 · Smoke Detection
  > INTERMITTENT "MAIN CARGO SMOKE" INDICATION UPON INITIAL DESCENT FOR A FEW MINUTES, THEN NO FURTHER INDICATION. RAN SMOKE DET TEST, PER AMM 10-R-817-MM REV D SUP 26-19-01. TEST GOOD.
- [SDR I5EA2020100500002](https://openairdocs.org/sdr/I5EA2020100500002.md): Slide · unwanted deploy · Sep 13, 2020 · N309GT · Boeing 7374Q8 · Escape Slide
  > L1 DOOR EVACUATION SLIDE INADVERTENTLY DEPLOYED BY GROUND CREW. SLIDE DEFFERED ON LOGPAGE 59980, MEL 52-16, CAT B, EXP 9-16-20, TRACKING NUMBER 2009035. SLIDE REPLACED ON LOGPAGE 59981, IAW B737 AMM 25-61-35.
- [SDR I5EA2020071600003](https://openairdocs.org/sdr/I5EA2020071600003.md): Light · inoperative · Jul 16, 2020 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > RT AISLE EMERGENCY LIGHT INOP AT STA 500E.
- [SDR I5EA2020062370001](https://openairdocs.org/sdr/I5EA2020062370001.md): Outflow Valve · malfunctioned · Jun 17, 2020 · N285XA · Boeing 7374Q8 · Pressure Regulator/Outflow Valve
  > WHILE AT 360 IN CRUISE, CABIN EXCEEDED 10K FT, UNABLE TO CONTROL CABIN PRESSURE AND CHECK LIST COMPLETED. OUTFLOW VALVE MALFUNCTIONED.
- [SDR Q2SA20200608432](https://openairdocs.org/sdr/Q2SA20200608432.md): Buss · malfunctioned · Jun 8, 2020 · N309GT · Boeing 7374Q8 · AC Generator-Alternator
  > AIRCRAFT GROUNDED. GEN 1 LOSS TRANSFER BUS FAIL ALL INSTRUMENTS OFF EXCEPT F/O PFD. FOUND GEN CONTROL UNIT #1 UNLOCKED AND SLID OUT OF RACK APPROX 3 IN RESECURED #1 GCU AND PERFORMED OPS CK IAW B737-400 AMM 24-21-81-404-007 AND 24-21-81-705-001 ALL CKS GOOD
- [SDR I5EA2020051400003](https://openairdocs.org/sdr/I5EA2020051400003.md): Sign · inoperative · Apr 25, 2020 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > SEAT ROW 14 AMD REAR OVERHEAD EXIT SIGN W/N HOLD A CHARGE.
- [SDR I5EA2020051400002](https://openairdocs.org/sdr/I5EA2020051400002.md): Sign · inoperative · Apr 25, 2020 · N285XA · Boeing 7374Q8 · Emergency Lighting
  > AFT GALLEY RIGHT OVER DOOR EXIT SIGN INOP

Next page: https://openairdocs.org/model/boeing-737-4q8/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 = '7374Q8'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/boeing-737-4q8/reports

---
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