# Service difficulty reports: CFM International CFM56-7B27/B3 series

A list on [CFM International CFM56-7B27/B3 series](https://openairdocs.org/engine/cfm-international-cfm56-7b27-b3-series.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 8 · 363 reports

- [SDR CALA2026012113129](https://openairdocs.org/sdr/CALA2026012113129.md): Anti-Ice Valve · faulted · Jan 18, 2026 · N39416 · Boeing 737924ER · Engine Anti-Icing System
  > RTO AT 20KTS FOR COWL ANTI-ICE CAUTION NR 1 ENGINE. R & R THE NR 1 ENGINE COWL ANT-ICE VALVE IAW AMM 30-21-11-400-801. OPS & LEAK CHECKED GOOD IAW AMM 30-21-11-400-801. ACFT OK TO CONTINUE SERVICE.
- [SDR ASAA2023012391589](https://openairdocs.org/sdr/ASAA2023012391589.md): Packing · leaking · Jan 19, 2023 · N594AS · Boeing 737890 · Turbine Engine Oil System
  > ENGINE NUMBER 1 HAS OIL BY THE IDG DOOR. LOOKS EXCESSIVE. GROUNDED - YES. FOUND EVIDENCE OF SEALOL SEAL LEAKING. REPLACED SELOL SEAL IAW B737-800 AMM 72-60-00.
- [SDR CALA2023010900064](https://openairdocs.org/sdr/CALA2023010900064.md): Hmu · inoperative · Jan 9, 2023 · N78509 · Boeing 737824 · Cylinder Head Temperature (CHT) Indicating System
  > LEFT ENGINE UNABLE TO PRODUCE MORE THAN 90.1 WITH A REQUEST FOR MAX RIGHT ENG 100.3 CLOSE TO 80 DEGREES AT IDLE. REMOVED MAIN FUEL PUMP. INSTALLED NR 1 HMU IAW AMM 73-21-10-400-801-F00 UP TO STEP G. INSTALLED MAIN FUEL PUMP IAW AMM 73-11-11-400-801-F00. P
- [SDR ASAA2023010241358](https://openairdocs.org/sdr/ASAA2023010241358.md): Spacer · debonded · Jan 2, 2023 · N590AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING FAN LUBE CARD #1 ENG FOUND SPACERS DISBONDING ON 2, 3, 4, 5, 7, 11, 13, 14, 15, 17, 18, 19, & 20. GROUNDED - YES. REMOVED AND REPLACED #1 ENG FAN SPACERS ON FAN LUBE T/C.
- [SDR ASAA2022112940967](https://openairdocs.org/sdr/ASAA2022112940967.md): Bleed Valve · faulty · Nov 29, 2022 · N512AS · Boeing 737890 · Compressor Bleed Valve
  > P6-4 BLEED AIR VALVES LEFT CIRCUIT BREAKER FOUND OPEN DURING PRE-FLIGHT. GROUNDED - YES. P6-4,A7 C796 C/B POPPED OPEN AFTER RESET REF SSM 36-11-11-102 REMOVED CONNECTOR DP1102 FOR #1 ENG BLEED AIR REGULATOR M1180,CB STAYS IN WITH #1 ENG BLEED SWITCH ON. REMOVE
- [SDR ASAA2022101040233](https://openairdocs.org/sdr/ASAA2022101040233.md): Spacer · unbonded · Oct 10, 2022 · N512AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING FAN LUBE ASA T/C 78472010, #1 ENGINE, FOUND #10 SPACER ELASTOMER STRIP UNBONDED. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE, #10 SPACER ELASTOMER STRIP PER ASA T/C 78472010.
- [SDR ASAA2022101040234](https://openairdocs.org/sdr/ASAA2022101040234.md): Shim · worn · Oct 10, 2022 · N512AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING FAN LUBE ASA T/C 78472010, #1 ENGINE FOUND ALL SHIMS TO BE WORN. GROUNDED - YES. REMOVED AND REPLACED ALL #1 ENGINE SHIMS PER ASA T/C 78472010.
- [SDR ASAA2022100740215](https://openairdocs.org/sdr/ASAA2022100740215.md): Engine · leaking · Oct 7, 2022 · N585AS · Boeing 737890 · Engine Cooling System
  > # 2 ENGINE DRIPPING FUEL. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2022100340154](https://openairdocs.org/sdr/ASAA2022100340154.md): Spacer · debonded · Oct 3, 2022 · N584AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER ASA TC 78472010 #2 ENF FAN LUBE SPACERS #1,2,3,4,5,8,10,11,13,14,16,20,21,22,23 AND 24 ARE DISBONDED. GROUNDED - YES. REMOVED & REPLACED #2 ENG FAN LUBE SPACERS #1,2,3,4,5,8,10,11,13,14,16,20,21,22,23 AND 24 IAW ASA T/C 78472010.
- [SDR ASAA2022092740136](https://openairdocs.org/sdr/ASAA2022092740136.md): Valve · leaking · Sep 27, 2022 · N585AS · Boeing 737890 · Engine Fuel and Control
  > #2 ENGINE FUEL DRIPPING FROM DRAIN MAST WITH ENGINE OFF. GROUNDED - YES. FUEL LEAKING FROM #2 ENGINE TBV @ 70 DROPS /MIN STATIC. RAN ENGINE FOR 5 MINUTES REF B737-800 AMM 71000-00-700-801-F00 TEST 3A. LEAKAGE STOPPED. AFTER SHUT DOWN 4 DROPS /MIN. DEFERRED MA
- [SDR ASAA2022091239946](https://openairdocs.org/sdr/ASAA2022091239946.md): Engine · multiple ind · Sep 12, 2022 · N587AS · Boeing 737890 · Turbine Engine Compressor Section
  > #2 ENGINE S/N 894549 REF ASA T/C SBC FM 56-7B-72-1074-1, THIRD STAGE VSV SEGMENT AT 4 O'CLOCK SEAL SEGMENT GAP IS GREATER THEN.500, J HOOK MISSING AND STATOR SHROUD HAS MATERIAL LOOSE & MISSING. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE. REF ASA SHOP W/O
- [SDR ASAA2022082539678](https://openairdocs.org/sdr/ASAA2022082539678.md): Igniter · faulty · Aug 25, 2022 · N584AS · Boeing 737890 · Ignition Harness (Distribution)
  > WHILE STARTING ENGINE #1 NO FUEL FLOW WITHIN 30 SEC. ON 2ND START ATTEMPT FUEL FLOW CAME UP NORMALLY AND DROPPED TO0 IN A FEW SECONDS. ON 3RD ATTEMPT USING IGN L ENGINE STARTED NORMALLY. STARTS 1+2 WERE ON IGN R. GROUNDED - YES. REMOVED & REPLACED IGNITER PLUG
- [SDR ASAA2022081039459](https://openairdocs.org/sdr/ASAA2022081039459.md): Sensor · bent · Aug 10, 2022 · N586AS · Boeing 737890 · Engine Fuel Indicating System
  > DURING REPLACEMENT OF J9 AND J10 HARNESSES ON ENG 1, REF ASA LOGPAGE 60482836, FOUND T3 SENSOR RECEPTACLE BENT. GROUNDED - YES. REMOVED AND REPLACED T3 SENSOR IAW B737-800 AMM 73-21-07/401.
- [SDR ASAA2022072239309](https://openairdocs.org/sdr/ASAA2022072239309.md): Seal · leaking · Jul 22, 2022 · N583AS · Boeing 737890 · Turbine Engine Accessory Drive
  > #2 ENGINE CONTINUES TO SHOW GREATER THAN EXPECTED OIL CONSUMPTION. GROUNDED - YES. REMOVED AND REPLACED SEALOL SEAL IAW B737-800 AMM 72-60-00.
- [SDR ASAA2022063038882](https://openairdocs.org/sdr/ASAA2022063038882.md): Connector · broken · Jun 30, 2022 · N587AS · Boeing 737890 · Airfoil Anti/De-ice System
  > #2 ENGINE TAI VALVE CONNECTOR BACK SHELL IS BROKEN OFF. GROUNDED - YES. REMOVED AND REPLACED MW0313 ON #2 ENGINE ALL TESTS CK GOOD REF B737-800 AMM 71-51-03-000/400-801-F00.
- [SDR ASAA2022062438800](https://openairdocs.org/sdr/ASAA2022062438800.md): Transmitter · leaking · Jun 24, 2022 · N587AS · Boeing 737890 · Fuel Flow Indicating
  > WHILE PERFORMING LEAK CHECK ON THE # 1 MOTOR NOTED THE FUEL FLOW TRANSMITTER LEAKING. GROUNDED - YES. REMOVED AND REPLACED # 1 ENG FUEL FLOW TRANSMITTER AND PERFORMED GOOD OP CHECK IAW B737-800 AMM 73-31-01, NO LEAK NOTED AT THIS TIME.
- [SDR ASAA2022062338773](https://openairdocs.org/sdr/ASAA2022062338773.md): Platform · worn · Jun 23, 2022 · N586AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING TC 78472010 FOUND 8 PLATFORMS WITH RUBBER MISSING. (6, 11, 12, 17, 19, 20, 22, AND 24). GROUNDED - YES. REPLACED 8 PLATFORMS (6, 11, 12, 17, 19, 20, 22, AND 24) REF TC 78472010.
- [SDR ASAA2022062338774](https://openairdocs.org/sdr/ASAA2022062338774.md): Elastomer · loose · Jun 23, 2022 · N586AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHIG TC 78472010 FOUND 11 SPACERS WITH LOOSE ELASTOMER (1, 2, 4, 5, 10, 12, 13, 16, 21, 23, AND 24). GROUNDED - YES. REPLACED 11 SPACERS (1, 2, 4, 5, 10, 12, 13, 16, 21, 23, AND 24) REF TC 78472010.
- [SDR ASAA2022061738699](https://openairdocs.org/sdr/ASAA2022061738699.md): Drain Line · leaking · Jun 17, 2022 · N583AS · Boeing 737890 · Engine Oil Distribution (Airframe Furnished)
  > #1 ENG MAIN FUEL/OIL HEAT EXCHANGER PAD DRAIN LINE DRIPPING FUEL OUT OF LIMITS. GROUNDED - YES. REMOVED #1 MAIN FUEL/OIL HEAT EXCHANGER PER B737-800 AMM 79-21-02-00-801. REPLACED THE #1 ENG FUEL/OIL HEAT EXCHANGER REF AMM 79-21-02. LK AND OPS CHKS GOOD.
- [SDR ASAA2022061738936](https://openairdocs.org/sdr/ASAA2022061738936.md): O-Ring · leaking · Jun 17, 2022 · N583AS · Boeing 737890 · Turbine Engine Accessory Drive
  > #2 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED RECOMMEND SEA ONLY. GROUNDED - YES. ACCOMPLISHED STEPS 1 THROUGH 5. FOUND SMALL PUDDLE OF OIL BELOW DEVE PAD COVER. REPLACED DRIVE PAD O-RINGS REF B737-800 AMM 7
- [SDR ASAA2022053038504](https://openairdocs.org/sdr/ASAA2022053038504.md): Seal · leaking · May 30, 2022 · N583AS · Boeing 737890 · Turbine Engine Accessory Drive
  > #2 ENGINE OIL CONSUMPTION IS HIGHER THAN DESIRED. CURRENT OIL CONSUMPTION.4. GROUNDED - YES. COMPLETED STEPS 1 AND 2 OF TSR AND BAGGED OIL DRAINS FOR STEP 3. FOUND IDG SEALOL SEAL LEAKING. REMOVED AND REPLACED #2 IDG SEALOL SEAL REF B737-800 AMM 72-60-00-400-
- [SDR ASAA2022052738500](https://openairdocs.org/sdr/ASAA2022052738500.md): Igniter · damaged · May 27, 2022 · N587AS · Boeing 737890 · Ignition Harness (Distribution)
  > WHILE WORKING A T-101 FOR TRANSIT BLEED VALVE HARNESS CHANGE: FOUND LT & RT IGNITER LEAD COOLING TUBE (ORANGE) DISCONNECTED ON THE LT AND TORN ON THE RT. GROUNDED - YES. INSPECTED IGNITER LEADS FOR HEAT DAMAGE/TO INCLUDE IGNITER PLUG CONTACTOR. NO DEFECTS FOUN
- [SDR ASAA2022052538448](https://openairdocs.org/sdr/ASAA2022052538448.md): Harness · faulty · May 25, 2022 · N585AS · Boeing 737890 · Fuel Controlling System
  > #1 ENGINE EGT TREND DATA SHOWS RECENT GREATER THAN NORMAL SCATTER AND INCREASE IN DELTA EGT/DECREASE IN EGTHDM. GROUNDED - YES. REF ASA L/P 60458740. INPUT MONITOR OF EEC BITE ENG #1 AS FOLLOWS: S1 = 74.81 S2 = 40.82 S3 = 291.99 S4 = 88.71. CLEANED CJ10 CONNEC
- [SDR ASAA2022052538454](https://openairdocs.org/sdr/ASAA2022052538454.md): Sensor · damaged · May 25, 2022 · N585AS · Boeing 737890 · Fuel Controlling System
  > DURING TROUBLESHOOTING #1 ENG EGT REF ASA LOG 60458740 AND ASA TSR TSR7122012, FOUND T3A CONNECTOR INSULATOR DAMAGE AND T3 SENSOR PIN DAMAGE. SENSOR KEYWAY FOUND BROKEN. GROUNDED - YES. REPLACED T3 SENSOR REF B737-800 AMM 73-21-07, EEC TEST PASS. REPLACED J9 H
- [SDR ASAA2022052538455](https://openairdocs.org/sdr/ASAA2022052538455.md): Harness · faulty · May 25, 2022 · N585AS · Boeing 737890 · Fuel Controlling System
  > RED BOX AROUND #1 EGT APPEARS AFTER LANDING. GROUNDED - YES. ENGINE 1 BITE CHECK SHOWS FAULT 77-20861, ENGINE EXCEEDANCE PAGE SHOWS EGT EXCEEDANCE 961 2 SECONDS AT ALT 818, ENGINE EXCEEDANCE MENU SHOWS THIS IS THE THIRD EXCEEDANCE. RESET CURRENT EXCEEDANCE PER
- [SDR ASAA2022052438503](https://openairdocs.org/sdr/ASAA2022052438503.md): Bleed Valve · failed · May 24, 2022 · N587AS · Boeing 737890 · Engine Cooling System
  > WHILE PERFORMING ASA TC 78273000 FOUND FC 75-30602 THE TBV POSITION SIGNALS DISAGREE. ON LEGS 1 AND 5. ON #2 ENGINE. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 25-23 802 & 803. FOUND TBV RESISTANCE BAD, PINS 2-3 87.1 OHMS PINS 4-5 31.4 OHMS PINS 5-6 31.3 OHMS O
- [SDR ASAA2022051438303](https://openairdocs.org/sdr/ASAA2022051438303.md): Shim · out of limits · May 14, 2022 · N594AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING #2 FAN BLADE LUBE FOUND 24 SHIMS TO BE OUT OF LIMITS. GROUNDED - YES. REMOVED AND REPLACED 24 EA FAN BLADE SHIMS ON #2 ENGINE PER TASK CARD 78472010.
- [SDR ASAA2022051438317](https://openairdocs.org/sdr/ASAA2022051438317.md): Platform · worn · May 14, 2022 · N594AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING #2 FAN BLADE LUBE FOUND 6 PLATFORMS WORN OUT OF LIMITS. GROUNDED - YES. REMOVED AND REPLACED 6 EA PLATFORMS ON #2 ENGINE PER TASK CARD 78472010.
- [SDR ASAA2022051438318](https://openairdocs.org/sdr/ASAA2022051438318.md): Spinner · damaged · May 14, 2022 · N594AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING #2 FAN BLADE LUBE FOUND FRONT SPINNER DAMAGED. GROUNDED - YES. REMOVED AND REPLACED SPINNER ON #2 ENGINE PER TASK CARD 78472010.
- [SDR ASAA2022051438326](https://openairdocs.org/sdr/ASAA2022051438326.md): Bleed Valve · faulty · May 14, 2022 · N587AS · Boeing 737890 · Engine Cooling System
  > #2 ENG SHORT TIME(MSG NBR: 75-30602)THE TBV POSITION SIGNALS DISAGREE. DEFERRED PER T/C 78273000. GROUNDED - YES. REMOVED AND REPLACED TRANSIENT BLEED VALVE PER B737-800 AMM TASK 75-23-01,LEAK CHK GOOD, OPS CHK GOOD.
- [SDR ASAA2022050838266](https://openairdocs.org/sdr/ASAA2022050838266.md): Eec · faulty · May 8, 2022 · N587AS · Boeing 737890 · Fuel Control/Turbine Engines
  > SHORT TERM FAULT 75-30602 (TBV POSITION SIGNALS DISAGREE) FOUND WHILE ACCOMPLISHING ASA T/C 78283000 FOR ENG #2. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE EEC. GROUND VERIFICATION PASS. REF B737-800 AMM 73-21-60-000/400-801-F00 FAULT NO LONGER EXISTS.
- [SDR ASAA2021081335705](https://openairdocs.org/sdr/ASAA2021081335705.md): Eec · faulted · Aug 13, 2021 · N512AS · Boeing 737890 · Fuel Controlling System
  > DURING "AFTER ENGINE CHANGE" TESTING - MULTIPLE FAULTS LOGGED DURING EEC BITE TEST AND ACUATOR TESTS. GROUNDED - YES. REMOVED AND REPLACED EEC ON #1 ENG REF AMM TASKS 73-21-60-000-801-F00 AND TASK 73-21-60-400-801-F00. PERFORMED FADEC SYSTEM TEST REF TASK 73-2
- [SDR ASAA2021081035685](https://openairdocs.org/sdr/ASAA2021081035685.md): Turbine Wheel · distressed · Aug 10, 2021 · N512AS · Boeing 737890 · Turbine Section
  > PER MAINTENANCE CONTROL, SEA ACCOMPLISHED THE FOLLOWING DEFECT: WHILE ACCOMPLISHING TASK CARD #78472022 "SDI BOROSCOPE ENGINE HPT BLADES" #2 ENGINE S/N 895170 FOUND 2 FULL CRACKS ON ONE LPT SEGMENT WITH 3 EACH HOLES (LESS THAN 0.0390 SQ INCH AREA) AND RADIAL C
- [SDR ASAA2021080735723](https://openairdocs.org/sdr/ASAA2021080735723.md): Engine · faulty · Aug 7, 2021 · N512AS · Boeing 737890 · Engine Temperature Indicating System
  > AFTER SHUTDOWN EGT DIGITAL READOUT BOX TURNED RED ON #2 ENGINE NO ABNORMAL INDICATIONS NOTED PRIOR TO THE RED BOX. GROUNDED - YES. #2 ENG. REPLACED, TRANSFERRED TO EBU SHOP W/O 1882177 SEAMC WILL NOTIFIED.
- [SDR ASAA2021061535131](https://openairdocs.org/sdr/ASAA2021061535131.md): Actuator · faulted · Jun 15, 2021 · N592AS · Boeing 737890 · Turbine Engine Compressor Section
  > WHILE PERFORMING T/C 78273000 FOUND LONG TIME MESSAGE ON #2 ENG # 75-10392 VSV POSTION SIGNAL IS OUT OF RANGE, DEFERRED PER T/C 78273000. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 75-31 TASK 803 PER STEP F (4) CONNECTOR DP0902 TO DP0902 PIN 2 TO PIN 3 RESISTAN
- [SDR ASAA2021052934983](https://openairdocs.org/sdr/ASAA2021052934983.md): Pressure Switch · faulty · May 29, 2021 · N586AS · Boeing 737890 · Engine Fuel Indicating System
  > WHILE ACCOMPLISHING T/C 78273000 #2 ENG CODE 73-31072 LONG TIME FAULT THE FUEL FILTER SIGNALS DISAGREE. GROUNDED - YES. REMOVED AND REPLACED #2 ENG FUEL FILTER DIFFERENTIAL PRESSURE SWITCH PER B737-800 AMM 73-34-01. OPS TEST NORMAL. LEAK TEST GOOD.
- [SDR ASAA2021052634982](https://openairdocs.org/sdr/ASAA2021052634982.md): Blade · cracked · May 26, 2021 · N512AS · Boeing 737890 · Turbine Section
  > WHILE ACCOMP #1 ENG S/N 897424 HPT BLADE INSPECTION TC 78472022. FOUND ONE LPT 1ST STG NGV @ APPROX 3CLOCK POSN AFT LOOKING FWD. HAD ONE FULL CRACK WITH INTERSECTING RADIAL (1 EACH) LESS THAN ONE INCH IN LENGTH. GROUNDED - YES. #1 ENG ESN 897424 REMOVED AND R
- [SDR ASAA2021052034877](https://openairdocs.org/sdr/ASAA2021052034877.md): Guide Vane · cracked · May 20, 2021 · N594AS · Boeing 737890 · Turbine Section
  > WHILE ACCOMPLISHING #2 ENG HPT BORO T/C 78472022 FOUND 4 EA LPT NGV CRACKED. EACH CRACKED NGV IS IN IT'S OWN SEGMENT. ONE IS CRACKED 1/2 TO 3/4 CHORD. 2 EA ARE CRACKED FULL CHORD. ONE IS CRACKED FULL CHORD WITH INTERSECTING CRACKS AND MISSING MATERIAL GREATER
- [SDR ASAA2021041734592](https://openairdocs.org/sdr/ASAA2021041734592.md): Switch · failed · Apr 17, 2021 · N592AS · Boeing 737890 · Fuel Controlling System
  > #2 ENG VALVE CLOSED LIGHT ILLUMINATED BRIGHT DOES NOT DIM. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE HMU HPSOV SWITCH REF B737-800 AMM 73-21-09-000/400-801-F00. OP CHECK NORMAL.
- [SDR ASAA2021041434575](https://openairdocs.org/sdr/ASAA2021041434575.md): Spacer · debonded · Apr 14, 2021 · N512AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER T/C 78472010 #2 ENG FAN BLADE LUBE INSP SPACERS #4 AND 16 ELASTOMERS ARE DISBONDED. GROUNDED - YES. REPLACED #2 ENG BLADE SPACERS #4 AND #16 PER T/C 78472010.
- [SDR ASAA2021041434576](https://openairdocs.org/sdr/ASAA2021041434576.md): Platform · wrong part · Apr 14, 2021 · N512AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER T/C 78472010 #2 ENG FAN BLADE LUBE INSP, PLATFORM #11 HAS A WRONG PART #. GROUNDED - YES. REPLACED #11 PLATFORM ON #2 ENGINE PER T/C 78472010.
- [SDR ASAA2021032834453](https://openairdocs.org/sdr/ASAA2021032834453.md): Gearbox · leaking · Mar 28, 2021 · N584AS · Boeing 737890 · Turbine Engine Oil System
  > REPEAT OIL LEAKING #1 ENG ONTO FMU PUDDLING. GROUNDED - YES. REMOVED TGB REF B737-800 AMM 72-62-00-000-801-F00, INSTALLED SERVICEABLE TGB REF AMM 72-62-00-400-801-F00. ACCOMPLISHED TEST 3 B OF AMM 71-00-00-700-023-F00 REF ALSO AMM 72-62-00-400-801-F00.
- [SDR ASAA2021031734312](https://openairdocs.org/sdr/ASAA2021031734312.md): Spacer · debonded · Mar 17, 2021 · N592AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER T/C 78472010 #2 ENG. FAN BLADE LUBE, SPACER #20 ELASTOMER IS DIDBONDED. GROUNDED - YES. REMOVED AND REPLACED #20 SPACER ON #2 ENG. REF T/C 78472010.
- [SDR ASAA2021031734313](https://openairdocs.org/sdr/ASAA2021031734313.md): Blade · worn · Mar 17, 2021 · N592AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER T/C 78472010 #2 ENG. FAN BLADE LUBE, #17 FAN BLADE MISSING CU-NI-IN COATING BEYOND LIMITS. GROUNDED - YES. REMOVED AND REPLACED BLADE #17 AND ITS PAIR #5 ON #2 ENG. REF. T/C 78472010.
- [SDR ASAA2021030934261](https://openairdocs.org/sdr/ASAA2021030934261.md): Spacer · debonded · Mar 9, 2021 · N592AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > PER T/C 78472010 #1 ENG. FAN BLADE LUBE, SPACERS #1, 11, 18, AND 22 ELASTOMERS ARE DISBONDED. GROUNDED - YES. REPLACED #1 ENG. FAN BLADE SPACERS #1, 11, 18, AND 22 PER T/C 78472010.
- [SDR ASAA2021030934270](https://openairdocs.org/sdr/ASAA2021030934270.md): Fuel Sys · leaking · Mar 9, 2021 · N585AS · Boeing 737890 · Fuel Controlling System
  > FUEL LEAK NOTED AT #2 ENGINE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2020122533766](https://openairdocs.org/sdr/ASAA2020122533766.md): Bracket · loose · Dec 25, 2020 · N586AS · Boeing 737890 · Engine (Turbine/Turboprop)
  > DURING J9 HARNESS CHANGE, FOUND BRACKET THAT HOLDS J9 TO 3 O'CLOCK STRUT LOOSE UNDER RIVETS. GROUNDED-YES. REMOVED AND REPLACED BRACKET AND FASTENERS, BRACKET IS SECURE IN PLACE, REF B737-800 SRM 51-40-02. NO OTHER DEFECTS NOTED.
- [SDR ASAA2020121933730](https://openairdocs.org/sdr/ASAA2020121933730.md): Start Valve · stuck · Dec 19, 2020 · N585AS · Boeing 737890 · Engine Start Valves/Controls
  > NR 1 ENGINE START VALVE FAILED TO OPEN DURING ENGINE START. GROUNDED-YES. NR 1 ENGINE START VALVE FROZEN. THAWED VALVE AND ENGINE NR 1 START, OPERATIONS NORMAL.
- [SDR ASAA2020121233687](https://openairdocs.org/sdr/ASAA2020121233687.md): Heat Exchanger · damaged · Dec 12, 2020 · N584AS · Boeing 737890 · Engine Fuel/Oil Cooler
  > WHILE REPLACING NR 1 ENGINE FUEL PUMP PACKAGE FUEL/OIL HEAT EXCHANGER FAILED BOLT TORQUE LOCKING CHECK. GROUNDED-YES. REMOVED AND REPLACED MAIN OIL/FUEL HEAT EXCHANGER, IAW B-737-800 AMM 79-21-02-000-801-F00 AND AMM 79-21-02-400-801-F00. ACCOMPLISHED TESTS
- [SDR ASAA2020121133686](https://openairdocs.org/sdr/ASAA2020121133686.md): Spinner · damaged · Dec 11, 2020 · N586AS · Boeing 737890 · Turbine Engine Air Inlet Section
  > NR 2 ENGINE FRONT SPINNER COATING OUT OF LIMITS. GROUNDED-YES. REMOVED AND REPLACED NR 2 ENGINE FWD SPINNER, REF T/C 78472010.

Next page: https://openairdocs.org/engine/cfm-international-cfm56-7b27-b3-series/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 engine_model_key = 'CFM567B27B3'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/cfm-international-cfm56-7b27-b3-series/reports

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