# Service difficulty reports: CFM International CFM56-7B26E series

A list on [CFM International CFM56-7B26E series](https://openairdocs.org/engine/cfm-international-cfm56-7b26e-series.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2026FA0000907](https://openairdocs.org/sdr/2026FA0000907.md): Oil System · leaking · Oct 27, 2026 · N400AS · Boeing 73782R · Turbine Engine Oil System
  > AIRCRAFT HAD COMPLETED TEST FLIGHT AND WAS RETURNING TO BASE WHEN WARNING INDICATION SHOWED NR 2 ENGINE OIL QUANTITY WAS LOW (SHOWING 3 QUARTS). FLIGHT CREW PERFORMED INFLIGHT SHUTDOWN AND COMPLETED EMERGENCY LANDING AT BASE. AFTER PARKING, THE NR 2 ENGINE OI
- [SDR SWAA2026110236266](https://openairdocs.org/sdr/SWAA2026110236266.md): Elec Connector · dirty · Oct 27, 2026 · N8600F · Boeing 7378H4 · Fuel System Wiring
  > NR 1 ENGINE SHUTDOWN INFLIGHT DUE TO SUSPECTED FUEL LEAK. OK TO CONTINUE IAW MEL 28-6-01, SP1, SP3, & SP28. PERFORMED VENTS & DRAINS INSPECTION, IDLE PWR LEAK CHECK WITH NO FAULTS FOUND. ACCOMPLISHED FIM 28-41 TASK 816 (MESSAGE 28-41105 HI-Z OP/SHORT TO SH
- [SDR 3CEY2026100200001](https://openairdocs.org/sdr/3CEY2026100200001.md): Manifold · chafed · Sep 29, 2026 · N9HQET · Boeing 7378AS · Turbine Engine Combustion Section
  > DURING THE INCOMING INSPECTION THE FOLLOWING FINDINGS WERE OBSERVED FUEL MANIFOLD TUBE CHAFED WITH HOLE AT 11 O'CLOCK POSITION AFT LOOKING FORWARD, WEAR TO THE LPT COOLING BRACKET, ABRASIONS ON COMBUSTION CASE LOCATED ON THE TOP OF THE MID-FLANGE - DAMAGE DIME
- [SDR CALA2025121212077](https://openairdocs.org/sdr/CALA2025121212077.md): Anti-Ice Valve · faulted · Dec 10, 2025 · N34460 · Boeing 737924ER · Engine Anti-Icing System
  > UPON APPLICATION OF T/O THRUST RT ENG COWL ANTI- ICE AMBER LIGHT ILLUMINATED. R & R OF NR 2 COWL ANTI ICE VALVE, RT ENG ANTI-ICE VALVE REPLACED. OPS CHECK OK IAW AMM 30-21-11.
- [SDR CALA2025082708197](https://openairdocs.org/sdr/CALA2025082708197.md): Thermocouple · faulted · Aug 24, 2025 · N68453 · Boeing 737924ER · Engine Temperature Indicating System
  > RIGHT ENGINE EXCEEDED EGT 964. R & R NR 2 ENG LEFT UPPER EGT PROBE (T49.5S4) IAW AMM 77-21-04-401. PROBE TESTS OK, R & R LT LOWER NR 3 EGT PROBE ON NR 2 ENG IAW AMM 77-21-04-401 PROBE OPS CHECKS GOOD. R & R T495S4 AND CLEANED ALL T495 SENSRS, J9, J10, CJ
- [SDR CALA2025070806345](https://openairdocs.org/sdr/CALA2025070806345.md): Check Valve · failed · Jul 7, 2025 · N78540 · Boeing 737824 · Compressor Bleed Valve
  > FOUND OP1 5TH STAGE VALVE TO BE UNSERVICEABLE. REMOVED AND REPLACED L/H #1 ENG.T/R 5TH STAGE VALVE I.A.W. AMM 36-11-02 THIS ENTRY IS FOR FAILURE OF 5TH STAGE CHECK VALVE.
- [SDR CALA2025041703927](https://openairdocs.org/sdr/CALA2025041703927.md): Ignition Sys · inoperative · Apr 17, 2025 · N34460 · Boeing 737924ER · Ignition System
  > ENG 2 FAIL TO START SRONG FUEL SMELL MOTOR ENG SECOND ATTEMPT UN SUCCES REQUEST MEL 7401G. IGNITION 2 FAULTY. MX MSG 74-30962. IGNITION EXCITER LEFT/RIGHT POWER SUPPLY CABLES HAVE BEEN SWAPPED. WHEN CLEARING THIS MEL ITEM, ENSURE IGNITION EXCITER LEFT/RIGHT PO
- [SDR DALA2025032702258](https://openairdocs.org/sdr/DALA2025032702258.md): Fuel Control · malfunctioned · Mar 24, 2025 · N3769L · Boeing 737832 · Fuel Control/Turbine Engines
  > SHIP 3769 -DIV- TO PDX DUE TO RIGHT ENGINE SUSPECTED STALL. CORRECTIVE ACTION: BSI SHOWS NO DAMAGE TO COMPRESSOR. REPLACING HMU, FUEL PUMP, EEC AND BLOWING OUT PS3 LINE. FOQA DATA SHOWS ENGINE DID NOT STALL BUT FAILED TO ACCELERATE AFTER BOTH ENGINES WERE THRO
- [SDR SCNA20241017329](https://openairdocs.org/sdr/SCNA20241017329.md): Engine · power loss · Oct 16, 2024 · N846SY · Boeing 7378 · Engine (Turbine/Turboprop)
  > DEFECT 698089: ENGINE #2 N1 LIMITED ON TAKEOFF 81% THEN WE COULD NOT GET MORE THAT 76% N1 AT 6000'. NO OTHER ABNORMAL INDICATION. 10 MINUTES LATER ENGINE FAILED ON ITS OWN (EMERGENCY DECLARED). - - RESOLUTION: PERFORMED HIGH POWER ENGINE RUN IAW AMM 71-00-00
- [SDR CALA2024100700780](https://openairdocs.org/sdr/CALA2024100700780.md): Valve · faulty · Oct 3, 2024 · N68452 · Boeing 737924ER · Engine (Turbine/Turboprop)
  > L BLEED TRIP OFF LGT CAME ON AT 80KTS. TAKEOFF ABORTED. FOLLOWED FIM 36-10 TASK 809. UNABLE TO PERFORM TS OF PRECOOLER CHK AT LINE. REQUESTING MEL MEL 3603A CANNOT DEFER DUE TO ICING RESTRICTION REF AMM 36-11-00-700-801 ACCOMPLISHED HEALTH CHECK ON HIGH STAGE
- [SDR DALA2024012200941](https://openairdocs.org/sdr/DALA2024012200941.md): Compressor · stalled · Jan 21, 2024 · N3753 · Boeing 737832 · Turbine Engine Compressor Section
  > SHIP 3753- ATB, IFSD - RIGHT ENGINE COMPRESSOR STALL AND FAILURE AFTER TAKEOFF. CORRECTIVE ACTION: MAINTENANCE INSPECTED TAIL PIPE AND FOUND METAL; ENGINE CHANGE REQUIRED. ENGINE CHANGE IN WORK.
- [SDR CALA2022122603492](https://openairdocs.org/sdr/CALA2022122603492.md): Transmitter · inoperative · Dec 25, 2022 · N68453 · Boeing 737924ER · Turbine Engine Oil System
  > OIL FILTER BYPASS MESSAGE SHOWS ON THE ENGINE DISPLAY ENG 1 LIGHT EXTINGUISHED WHEN THRUST LEVER RETARDED REF TASK 79-05 TASK 817 REMOVED AND REPLACED SCAVENGE OIL FILTER:1 29-7912-3-0001,QTY:1 99-7921-3-0008,QTY:1 AND CLOGGING TRANSMITTER AND INSPECTED
- [SDR SWAA2022120677846](https://openairdocs.org/sdr/SWAA2022120677846.md): Oil System · low pressure · Dec 2, 2022 · N8601C · Boeing 7378H4 · Engine (Turbine/Turboprop)
  > AT FL370 NR 2 ENGINE OIL QTY AND PRESSURE STEADILY DROPPED TO ZERO; WITH ASSOCIATED ALERTS. COMPLIED WITH QRH PROCEDURES UP TO ENGINE SHUT DOWN. REMOVED AND REPLACED THE NR 2 ENGINE IAW 771-00-01 (LINE 12).
- [SDR CALA2022111603151](https://openairdocs.org/sdr/CALA2022111603151.md): Vent Line · low pressure · Nov 13, 2022 · N34455 · Boeing 737924ER · Powerplant System
  > THIS IS A SUPPLEMENTAL REPORT FOR THE SAME CONTROL NUMBER SUBMITTED ON 11/16/22. LOSS OF OIL PRESSURE AND 0 OIL QUANTITY RIGHT ENGINE. REMOVED SPINER CONES, REPLACED CENTER VENT TUBE AND ORINGS. PERFORMED LEAK AND OPS CHECK. OPS CHECK GOOD. NO LEAKS NOTED AT T
- [SDR DALA2022111007273](https://openairdocs.org/sdr/DALA2022111007273.md): Pump · damaged · Nov 7, 2022 · N3764D · Boeing 737832 · Hydraulic Pump (Electric/Engine), Main
  > SHIP 3764 -HYD/GEAR- DUE TO LOSS OF A SYSTEM HYDRAULICS AND SUBSEQUENT ALTERNATE GEAR EXTEND. CORRECTIVE ACTION: MAINTENANCE IN PROGRESS TO REPLACE #1 ENGINE DRIVEN PUMP.
- [SDR CALA2022071801802](https://openairdocs.org/sdr/CALA2022071801802.md): Connector · carboned · Jul 18, 2022 · N34460 · Boeing 737924ER · Engine Temperature Indicating System
  > ENGINE #1 OVERTEMPERATURE (EXCEPT STARTING) EGT OVER REDLINE.CONNECTORS AND FOUND LOWER LH EGT PROBE CONNECTOR WITH CARBON BUILT UP, SUGGEST CHANGING S3 EGT PROBES THEN PERFORM A POWER ASSURANCE RUN TO VERIFY CORRECTION. REPLACED THERMOCOUPLES S3 AND S4.PREFOR
- [SDR CALA2022070401645](https://openairdocs.org/sdr/CALA2022070401645.md): Fuel Heater · high pressure · Jul 4, 2022 · N38459 · Boeing 737924ER · Engine Exhaust System
  > NUMBER 2 ENGINE OIL FILTER BYPASS MASTER CAUTION. DID NOT EXTINGUISH CREW REPORTS HIGHER OIL PRESSURE ON #2 ENG AROUND 140PSI AND OIL QUANTITY IS 99%. REMOVED AND REPLACED #2 ENG SERVO FUEL HEATER,#2 ENG FUEL OIL HEAT EXCHANGER PER TOMC REQUEST. #2 ENG SERVO
- [SDR CALA2022062001544](https://openairdocs.org/sdr/CALA2022062001544.md): Engine · overtemp · Jun 20, 2022 · N37462 · Boeing 737924ER · Engine Temperature Indicating System
  > REJECTED TAKEOFF APROXIMATELY 110KTS DUE RED EGT ENGINE 2 INDICATION #2 ENG EXCEEDANCE WAS 950 DEGREES CELSIUS FOR 4 SECONDS, PEAKED OPENED ENGINE FOR BORESCOPE REF AMM 72-00-00-200-807-F00 AND ACP BOROSCOPES USING AMM72-00-00-200-807F00, AND AT 980 DEGREES CE
- [SDR 2022F00191](https://openairdocs.org/sdr/2022F00191.md): Bearing · out of limits · Apr 13, 2022 · Boeing 737 · Turbine Engine Accessory Drive
  > FOLLOWING DECLARATION OF OUR CONTRACTOR SAFRAN TRANSMISSION SYSTEM ABOUT APPROVED DATA INCONSISTANCY HE FOUND OUT TYPO IN DATASHEET RECORDING LEADING TO AN UNCORRECT DECISION. THE BEARING CAUSING DIFFICULTY HAVE RADIAL CLEARANCE OUT OF TOLERANCE. THE BEAR
- [SDR SWAA2022041192640](https://openairdocs.org/sdr/SWAA2022041192640.md): Engine · failed · Apr 9, 2022 · N8600F · Boeing 7378H4 · Engine (Turbine/Turboprop)
  > #2 ENG FAILURE DURING CLIMBOUT / [01] PERFORMED ENGINE TROUBLESHOOTING PER ESN 960782. RAN ENGINE AT 96% N1 FOR 5 MIN. NO LEAKS AND OPS CHECK NOR AL.
- [SDR CALA2021040500421](https://openairdocs.org/sdr/CALA2021040500421.md): Transmitter · faulted · Apr 5, 2021 · N38458 · Boeing 737900ER · Fuel Flow Indicating
  > DURING TAKEOFF ENG 2 FUEL FLOW WAS LOW AND FLUCTUATING WITH FILT ER BYPASS LIGHT ILLUM. ON CALL CONTRACT MX PERFORMED EEC BITE I.A.W FIM TASK 73-00-00-810-801-F00 AND FOUND 1 MSG FOR FUEL FILTERS DISAGREE BOWL TO BE CLEAN I.A.W AMM 73-05-00-810-801-F00. 73-31
- [SDR QEMY202103250001](https://openairdocs.org/sdr/QEMY202103250001.md): Shaft · worn · Mar 5, 2021 · N466L · Boeing 737* · Turbine Section
  > AT INCOMING INSPECTION TURBINE MODULE - THE HPTR REAR SHAFT HAS BEEN FOUND WITH WEAR OVER MANUAL LIMITS. THE PART IS A CHAPTER 5 ITEM AND AN LLP. THE PART HAS BEEN REMOVED FROM SERVICE EARLY.
- [SDR CALA2021021000161](https://openairdocs.org/sdr/CALA2021021000161.md): Hmu · malfunctioned · Feb 10, 2021 · N78448 · Boeing 737924ER · Fuel Controlling System
  > THROTLE SPLIT ON T/O FROM ORD W/ENG A/I ON. NEEDED TO PUSH LEFT THROTTLE 1 1/4 KNOB DEBRIFED CREW ON ARRIVAL. #1 ENG THROTTLE HAD TO BE MOVED TO MATCH #2 ENG. ENG#1 N1 89.5 ENG#2 N1 91.8 FOR T/O. DURING CLIMB A/T MATCHED AND A/C FLEW NORMAL. T/S PER FIM TASK 7
- [SDR DALA2020081002744](https://openairdocs.org/sdr/DALA2020081002744.md): Pump · inoperative · Aug 8, 2020 · N3752 · Boeing 737832 · Hydraulic Pump (Electric/Engine), Main
  > DE/HYD- DECLARED EMERGENCY INTO FAI DUE TO 'A' SYSTEM HYDRAULIC QUANTITY DROPPING. PRESSURE NORMAL. ALTERNATE GEAR EXTEND UTILIZED. CORRECTIVE ACTION: REPLACED LT ENGINE HYDRAULIC PUMP AND 'A' SYSTEM HYDRAULIC PRESSURE MODULE. PERFORMED 'A' HYDRAULIC SYSTEM FL
- [SDR SWAA2020040134812](https://openairdocs.org/sdr/SWAA2020040134812.md): Eec · faulty · Mar 28, 2020 · N8600F · Boeing 7378H4 · Fuel Control/Turbine Engines
  > ON TAKEOFF; LEFT ENG CONTROL LIGHT ILLUMINATED. (LOW SPEED REJECT) APPROX 60-70 KTS / R&R #1 ENG EEC PER MM 73-21-60. ISSUE # 2845700. POS 1 P/N OFF 2042M67P02 S/N OFF FFFB0038 P/N ON 2042M67P04 S/N ON FFFH2497
- [SDR CALA2019082301427](https://openairdocs.org/sdr/CALA2019082301427.md): Warning Message · illuminated · Aug 23, 2019 · N39450 · Boeing 737924ER · Turbine Engine Oil System
  > ENGINE OIL QUANTITY INDICATION, LOW. NR 2 ENGINE QUANTITY DROPPED TO 0 AND STAYED AT 0 AT FL310. OIL PRESSURE START FLUCTUATE. INSPECTED CHIP DETECTORS AND SCAVENGE SCREENS IAW AMM SCAVENGE SCREEN. REMOVED AND INSTALLED MCD IAW AMM 79-21-05. FOUND TEF
- [SDR CA190305015](https://openairdocs.org/sdr/CA190305015.md): Window · cracked · Mar 4, 2019 · Boeing 737* · Flight Compartment Windows
  > (CAN) R1 WINDOW CRACKED PRIOR TO ETOPS ENTRY POINT AND CREW CARRIED OUT AN AIR TURNBACK TO DEPARTING STATION. R1 WINDOW WAS REPLACED IAW AMM 56-11-11.

## 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 engine_model_key = 'CFM567B26E'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/cfm-international-cfm56-7b26e-series/reports

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