# Service difficulty reports: JASC 7311

A list on [JASC 7311](https://openairdocs.org/jasc/7311.md).

Reports filed under 7311 · Engine Fuel/Oil Cooler, newest first.

Page 1 of 5 · 226 reports

- [SDR AALA202604213464](https://openairdocs.org/sdr/AALA202604213464.md): Fuel Heater · leaking · Apr 17, 2026 · N973NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: RIGHT ENGINE FUEL FILTER BYPASS. LIGHT ILLUMINATED SHORTLY AFTER REACHING CRUISE ALTITUDE AT THE SAME TIME AS CENTER TANK REACHED ZERO FUEL. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA.
- [SDR 2025F00221](https://openairdocs.org/sdr/2025F00221.md): Fuel Filter · warning message · Sep 7, 2025 · N724AV · Airbus A320214
  > DURING GO OROUND ECAM WARNING ENG 1 FUEL FILTER CLOG
- [SDR AALA202509023546](https://openairdocs.org/sdr/AALA202509023546.md): Fuel Filter · clogged · Aug 29, 2025 · N897NN · Boeing 737823
  > AIRCRAFT WAS NOT GROUNDED: ENGINE 2 FILTER BYPASS LIGHT ILLUMINATED SHORTLY AFTER TAKEOFF. REPLACED NUMBER 2 ENGINE FUEL FILTER DIFFERENTIAL PRESSURE SWITCH (AALA202509024877), PER AMM 73-34-01. ALSO, REPLACED NUMBER 2 ENGINE FUEL FILTER (AALA202509023546). PE
- [SDR AALA202508221159](https://openairdocs.org/sdr/AALA202508221159.md): Pump · failed · Aug 21, 2025 · N805NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT 37K FEET OVER CUBA, NUMBER 1 ENGINE ROLLED BACK TO 40-50% N1. AUTO THROTTLES DISENGAGED. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. REMOVED AND REPLACED (HMU)-HYDROMECHANICAL UNIT LEFT
- [SDR IXXA2024022101](https://openairdocs.org/sdr/IXXA2024022101.md): Precooler · cracked · Feb 21, 2024 · N431AZ · Boeing 767300
  > # 1 ENGINE CORE COWL PRE-COOLER EXHAUST DUCT MATING FLANGE CHAFED AND CRACKED
- [SDR HALA20231211270](https://openairdocs.org/sdr/HALA20231211270.md): Unknown · unknown · Dec 9, 2023 · N214HA · Airbus A321271N
  > ETOPS - INFO TO MAINT: ECAM ENG 1 FUEL FILTER PARTLY CLOGGED DURING INITIAL CLIMB OUT. EXTINGUISHED AFTER ABOUT 3 MIN. NOTED BY MX. REMOVED AND REPLACED THE #1 ENG FUEL FILTER ELEMENT AND FUEL FILTER DIFFERENTIAL PRESSURE SENSOR PER AMM 73-11-06 / 73-34-21. OP
- [SDR CALA2023042101211](https://openairdocs.org/sdr/CALA2023042101211.md): Pump · faulty · Apr 21, 2023 · N37420 · Boeing 737900ER
  > PUSHED TOGA FOR TAKEOFF AND THE NO.1 ENGINE WOULD NOT MAKE T.O. POWER. REMOVED #1 ENGINE HMU, REMOVED & REPLACED #1 ENGINE FUEL PUMP PACKAGE. R&R UNIT, HYDROMECH (29-7321-9-0012 0485). PERFORMED TEST 5 - POWER ASSURANCE CHECK PER AMM 71-00-00-700-813-F00. TES
- [SDR NACA2023031000001](https://openairdocs.org/sdr/NACA2023031000001.md): Unknown · unknown · Mar 10, 2023 · N379CX · Boeing 767323
  > RIGHT EEC FAULT DURING FLIGHT. ASSIGNED MEL 73-21-01-01B CAT C.
- [SDR NACA2023030800001](https://openairdocs.org/sdr/NACA2023030800001.md): Unknown · unknown · Mar 8, 2023 · N351CM · Boeing 767323
  > R ENG FUEL FILTER EICAS ON CLIMBOUT. RIGHT ENGINE EICAS FUEL FILTER MESSAGE PERFORMED BY AND FOLLOW FIM 73-11 FAULT TREE 803 PER FIM REMOVED AND REPLACED FUEL FILTER PER AMM 73-11-02, LEAK CHECK OKAY.
- [SDR NI1R552PC030623](https://openairdocs.org/sdr/NI1R552PC030623.md): Oil Cooler · cracked · Mar 6, 2023 · N552PC · Piper PA44180
  > DURING A DUAL TRAINING FLIGHT THE PILOT NOTICE THE OIL PRESSURE DROPPING AND THE OIL TEMP CLIMBING. A PRECAUTIONARY ENGINE SHUTDOWN WAS PERFORMED, AND THE AIRCRAFT RETURNED TO THE AIRPORT. THE INVESTIGATION REVEALED THE L/H OIL COOLER HAD CRACKED ALONG THE BOT
- [SDR HALA202303060034](https://openairdocs.org/sdr/HALA202303060034.md): None · none · Mar 3, 2023 · N230HA · Airbus A321271N
  > ETOPS - ENG 1 FUEL FILTER CLOG ECAM INFLIGHT. REMOVED AND REPLACED FUEL FILTER IAW AMM 73-11-06-400-801-A. OPERATIONAL CHECK PERFORMED. OPS CHECK GOOD. LEAK CHECK GOOD.
- [SDR 2023FA0000104](https://openairdocs.org/sdr/2023FA0000104.md): Fuel/Oil Cooler · failed · Mar 1, 2023 · N80VM · Cessna 525B
  > WE HAVE HAD MULTIPLE ABORTED TAKE-OFFS FOR "FUEL BOOST ON" CAS MESSAGE DISPLAYED ON BOTH ENGINES WITH OTHER INSTANCES ON OUR OTHER 525B'S. ALL DEFECTS HAVE BEEN TRACED TO OIL/FUEL HEAT EXCHANGER BECOMING BLOCKED WITH DEBRIS. RESULTING IN THE COMPONENT BEING RE
- [SDR SWAA2023021300477](https://openairdocs.org/sdr/SWAA2023021300477.md): Pump · stalled · Feb 7, 2023 · N295WN · Boeing 7377H4
  > ON CLIMB OUT; #2 ENGINE WAS UNRESPONSIVE TO THRUST LEVER MOVEMENT. TOPPED OUT ABOUT 86.4% N1 EGT 40-90 WARMER THEN #1. RAN ENGINE LIMIT SURGE STALL QRH AND RECOVERED NORMAL ENGINE OPERATIONS EGT REMAINS STABLE 40 DEG. WARMER THEN #1.<[01] REMOVED AND REPLACED
- [SDR ASAA2022120541063](https://openairdocs.org/sdr/ASAA2022120541063.md): Heat Exchanger · leaking · Dec 5, 2022 · N464AS · Boeing 737990ER
  > FOUND #2 MAIN OIL/FUEL HEAT EXCHANGER PAD DRAIN. LEAKING. GROUNDED - YES. REMOVED AND REPLACED #2 ENG MAIN OIL/FUEL HEAT EXCHANGER REF B737-900 AMM 79-21-02-400-801-F00 LEAK CHECK AND OPS CHECK GOOD REF AMM 71-00-00-700-801-FOO TEST 3A.
- [SDR CALA2022071501768](https://openairdocs.org/sdr/CALA2022071501768.md): Strainer · broken · Jul 15, 2022 · N2332U · Boeing 777300ER
  > #2 ENGINE MAIN FUEL PUMP INTERSTAGE STRAINER FOUND BROKEN AND DEFORMED. REFERENCE TASK 73-11-04-200-801-H00. FOUND ABNORMAL DISCREPANCY (BROKEN MAIN FUEL PUMP INTERSTAGE LP#9057853 LOCATION IS # 1 ENGINE DISCREPANCY. FILTER) AT#1 ENGINE. RECOMMEND SDR TO B
- [SDR UIEA2022061300581](https://openairdocs.org/sdr/UIEA2022061300581.md): Fuel Filter · installed · Jun 13, 2022 · N664GT · Boeing 76731B
  > LEFT & RIGHT ENGINE FUEL FILTERS REQUIRES REPLACEMENT AT APPROX. 150 FLT HOURS DUE TO FUEL TANK ENTRY TO BE REPLACE PRIOR TO 108387 FLT HOURS. REMOVED AND REPLACED #1 ENGINE FUEL FILTER PER 767 M/M 73-11-03-404-009-1100, REQUIRES LEAK CHECK. REMOVED &
- [SDR ASAA2022051638356](https://openairdocs.org/sdr/ASAA2022051638356.md): Servo · leaking · May 16, 2022 · N433AS · Boeing 737990ER
  > #2 ENG FUEL HEATER SERVO LEAKING. GROUNDED - YES. REPLACED THE #2 ENGINE FUEL HEATER SERVO PER B737 AMM 73-11-07. LK AND OPS CK GOOD.
- [SDR NACA2022051200002](https://openairdocs.org/sdr/NACA2022051200002.md): Switch · unknown · May 12, 2022 · N399CM · Boeing 767323
  > L ENG FUEL FILTER. REMOVED AND REPLACED THE LEFT ENGINE FUEL FILTER IAW B767 AMM 73-11-02 OPS CHECKS NORMAL, NO LEAKS NOTED. REMOVED AND REPLACED THE LEFT ENGINE FUEL PRESSURE SWITCH IAW B 767 AMM 73-34-01 OPS CHECK NORMAL, NO LEAKS NOTED.
- [SDR CALA2022042901097](https://openairdocs.org/sdr/CALA2022042901097.md): Hydromech Unit · failed · Apr 27, 2022 · N37474 · Boeing 737924ER
  > PER CREW BRIEF OF AIR RETURN: RT ENGINE WILL NOT PRODUCE COMMANDED THRUST AT HIGH SETTINGS. 96.8 COMMANDED, 84.7 WAS THE HIGHEST ACHIEVED. THRUST LEVER MOVED FREELY, NO BINDING. AUTO THROTTLE DISCONNECTED MULTIPLE TIMES. UPDATED PRECAUTIONARY PARTS LIST, MAI
- [SDR KCSA2022041505](https://openairdocs.org/sdr/KCSA2022041505.md): None · none · Apr 15, 2022 · N739DH · Boeing 767
  > DECLARED EMERGENCY FOR LEFT ENGINE FUEL FILTER ENGINE INDICATING AND CREW ALERTING SYSTEM MESSAGE
- [SDR QXEA2022031800119](https://openairdocs.org/sdr/QXEA2022031800119.md): None · leaking · Mar 17, 2022 · N635QX · Emb ERJ170200LR
  > FUEL DRIPPING FROM #1 ENG FUEL PUMP MAIN SEAL DRAIN LINE. REMOVED #1 ENGINE FUEL PUMP REF E175 AMM TASK 73-11-01-000-801-A STEP 1-7 AND GE LMM 73-00-00-800-802 STEPS 1-7, 8 IS N/A AND STEP 9. INSTALLED NEW #1 ENGINE FUEL PUMP REF AMM 73-11-01-400-801-A. OPS AN
- [SDR NACA2022011800001](https://openairdocs.org/sdr/NACA2022011800001.md): Pump · failed · Jan 18, 2022 · N351CM · Boeing 767323
  > MI DUE TO NO FUEL FLOW LH ENGINE WHEN FUEL CONTROL SWITCH TO RUN @ 1530Z @ TTPP. REMOVED AND REPLACED LH ENGINE FUEL PUMP PER B767 AMM 73-11-01, FUEL PUMP CHECKS GOOD. ETOPS GROUND VERIFICATION COMPLIED WITH. UNIT IS PART OF DTO PARTS POOL, NO TIME INFO AVAIL
- [SDR 2022F00070](https://openairdocs.org/sdr/2022F00070.md): Fuel Nozzle · none · Dec 1, 2021 · Boeing 7879
  > MISSING MATERIAL ON RIGHT ENGINE FUEL NOZZLES CUPS, DURING THE OVERNIGHT AT MEX STATION AND IN ACCORDANCE WITH 1000FC-M2 CHECK, IT WAS REQUIRED A RIGHT ENGINE BORESCOPE INSPECTION. MAINTENANCE PERSONNEL PERFORMED THE RIGHT ENGINE BORESCOPE INSPECTION OF THE ST
- [SDR UIEA2021110102311](https://openairdocs.org/sdr/UIEA2021110102311.md): None · none · Oct 26, 2021 · N663GT · Boeing 767324
  > L ENG FUEL FILTER STATUS MSG(<P>INSPECTED FUEL FILTER ELEMENT IAW AMM 73-11-02-216-001-H00, NO CONTAMINATION FOUND. INSTALLED NEW FILTER ELEMENT IAW AMM 73-11-02-404-008-H00, RAN ENG IAW AMM 71-00-00-995-229-H03, NO LEAKS NOTED AND NO MSG ON EICAS DURING RUN.<
- [SDR NACA20211014001](https://openairdocs.org/sdr/NACA20211014001.md): None · none · Oct 14, 2021 · N321CM · Boeing 767323
  > DISCREPANCY: R ENGINE FUEL FILT APPEARED IN FLIGHT, THEN WENT AWAY AFTER ABOUT 3 MINUTES. REPLACED RIGHT ENGINE FUEL FILTER IAW 73-11-03, GROUND VERIFICATION AND LEAK CHECK OK, NO FAULTS NOTED.
- [SDR AALA202110153208](https://openairdocs.org/sdr/AALA202110153208.md): Heat Exchanger · unserviceable · Oct 13, 2021 · N947NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: DURING CRUISE AT FL 350 NUMBER TWO ENGINE REDUCED TO IDLE. OTHER INDICATIONS NORMAL EXCEPT OIL TEMPERATURE ROSE INTO CAUTION ZONE. ENGINE INDICATION FAILED TO RESPOND TO THROTTLE MOVEMENT. CREW SHUTDOWN ENGINE, DECLARED AN EMERGENCY AND
- [SDR 2021F00395](https://openairdocs.org/sdr/2021F00395.md): Heat Exchanger · leaking · Oct 4, 2021 · Boeing 737800*
  > LEFT ENGINE SERVO FUEL HEATER LEAKING. DURING TRANSIT CHECK, IT WAS DETECTED A FUEL LEAK AT LEFT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION, DETECTING THE LEFT ENGINE SERVO FUEL HEATER WITH FUEL LEAK; SO THE LEFT ENGINE SERVO FUEL HEATER WAS REPLACED IAW
- [SDR CALA2021100401770](https://openairdocs.org/sdr/CALA2021100401770.md): Oil Cooler · leaking · Oct 2, 2021 · N485UA · Airbus A320232
  > FUEL LEAK NUMBER 2ENGINE.ENGINE SHUTDOWNIAW CHECKLIST INSTALLED MISSING BOLTS ON FCOC BOTTOM LINE AND REPLACED ORING DAMAGED IAW AMM 73-11-49/201 CONF 00, RAN ENGINE FOR LEAK CHECK, NO LEAKS NOTED. OIL SERVICE ACCOMPLISHED AT MEX FOR FLT 2369 ON 01 OCT 12:49:
- [SDR ASMF202110019](https://openairdocs.org/sdr/ASMF202110019.md): Fuel Heater · leaking · Sep 9, 2021 · N368AR · Boeing 73786J
  > DURING TRANSIT CHECK, A FUEL LEAK WAS DETECTED IN THE RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION ON RIGHT ENGINE VENTS AND DRAINS, DETECTING LEAK FUEL ON HEATER SERVO FUEL; SO THE HEATER SERVO FUEL WAS REPLACED IAW AMM 73-11-07-400/000-801-F00 AND
- [SDR 2021F00227](https://openairdocs.org/sdr/2021F00227.md): Fuel Heater · leaking · Sep 9, 2021 · N368AR · Boeing 73786J
  > FUEL LEAK IN THE RIGHT ENGINE, DURING TRANSIT CHECK, A FUEL LEAK WAS DETECTED IN THE RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION ON RIGHT ENGINE VENTS AND DRAINS, DETECTING LEAK FUEL ON HEATER SERVO FUEL; SO THE HEATER SERVO FUEL WAS REPLACED IAW AM
- [SDR ASAA2021082535796](https://openairdocs.org/sdr/ASAA2021082535796.md): Heat Exchanger · failed · Aug 25, 2021 · N581AS · Boeing 737890
  > OIL/ FUEL HEAT EXCHANGER RUN ON TORQUE FAILED ON #1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED MAIN OIL/ FUEL HEAT EXCHANGER REF AMM 79-21-02-400-801-FOO.
- [SDR UIEA2021042701009](https://openairdocs.org/sdr/UIEA2021042701009.md): Valve · leaking · Apr 27, 2021 · N1511A · Boeing 767383
  > FUEL DRIPPING FROM RIGHT ENG(<P>ISOLATED FUEL LEAKAGE FROM AIR/FOIL HEAT EXCHANGER VALVE AND 2.5 BLEED VALVE ACTUATOR AT A RATE OF 8 TO 10 DROPS PER MIN. AFTER SHUTDOWN, LEAKAGE PERMITTED PER AMM 71-71-00-216-001-N00</P>)
- [SDR ASAA2021040934550](https://openairdocs.org/sdr/ASAA2021040934550.md): Heat Exchanger · leaking · Apr 9, 2021 · N533AS · Boeing 737890
  > ON WALK ALROUND FOUND FUEL LEAK UNDER #2 ENGINE. GROUNDED - YES. FOUND FUEL LEAKING AT #2 ENGINE MAIN OIL/FUEL HEAT EXCHANGER PAD DRAIN AT 27 DROPS PER MIN IAW B737-800 AMM 71-71-00-200-801. REMOVED AND REPLACED MAIN OIL/FUEL HEAT EXCHANGER, LEAK CHECK GOOD. R
- [SDR ASAA2021040834533](https://openairdocs.org/sdr/ASAA2021040834533.md): Heat Exchanger · leaking · Apr 8, 2021 · N431AS · Boeing 737990ER
  > REF LOG PAGE 60093274 DURING REMOVAL AND REPLACEMENT OF FUEL OIL HEAT EXCHANGER FOUND SERVO FUEL HEATER LEAKING ON #2 ENGINE. GROUNDED - YES. REMOVED AND REPLACED SERVO FUEL HEATER PER B737-900 AMM 73-11-07-400-801-F00 AND IDLE POWER LEAK CHECK GOOD PER AMM 71
- [SDR ASAA2021040634520](https://openairdocs.org/sdr/ASAA2021040634520.md): Heat Exchanger · leaking · Apr 6, 2021 · N433AS · Boeing 737990ER
  > FUEL DRIPPING FROM UNDERSIDE OF ENGINE #2. GROUNDED - YES. FOUND FUEL LEAK COMING FROM MAIN OIL/FUEL HEAT EXCHANGER PAD DRAIN APPROX <60 DPM, LESS THAN SERVICEABLE LIMIT, REF B737-900 AMM 71-71-00-200-801 FIG 605. REMOVED AND REPLACED #2 ENGINE OIL/FUEL HEAT E
- [SDR ASAA2021040334498](https://openairdocs.org/sdr/ASAA2021040334498.md): Heat Exchanger · leaking · Apr 3, 2021 · N431AS · Boeing 737990ER
  > FOUND FUEL DRIP ON #2 ENG FUEL OIL HEAT EXCHANGER DRAW LINE. GROUNDED - YES. REMOVED AND REPLACED FUEL OIL HEAT EXCHANGER REF B737-900 AMM 79-21-02 PERFORMED ENGINE RUN FOUND SERVO FUEL HEATER LEAKING REF L/P 60093288 FOR REMOVE AND REPLACEMENT.
- [SDR HALA2021030300024](https://openairdocs.org/sdr/HALA2021030300024.md): Bracket · cracked · Mar 1, 2021 · N383HA · Airbus A330243
  > ETOPS - #2 ENG FUEL TUBE L-BRACKET ON COMPRESSOR CASE CRACKED. #2 ENG FUEL TUBE L-BRACKET ON COMPRESSOR CASE CRACKED. REPLACED THE BRACKET IAW 73-11-42, CHECKED GOOD, OK FOR SERVICE.
- [SDR SIMA20210212001](https://openairdocs.org/sdr/SIMA20210212001.md): Fuel/Oil Cooler · malfunctioned · Feb 12, 2021 · N607AE · Emb EMB145LR
  > ABORTED TAKE OFF 80KTS ACCT MECHANICAL E1 FUEL LOW TEMP MSG ON E1 OIL TEMP 26C, OIL PRESSURE 70-80 PSI. AMBIENT TEMP -29C FLIGHT CANCELED-C/A-TROUBLESHOT IAW RR FIL 73-31-00. FOUND FCOC ISSUE. RAR FCOC IAW RR MM 79-25-15 RAN ENINE IAW RR MM 72-00-+00. OPC GOOD
- [SDR HALA2021020800015](https://openairdocs.org/sdr/HALA2021020800015.md): Fuel/Oil Cooler · damaged · Feb 7, 2021 · N360HA · Airbus A330243
  > ETOPS - DURING JIC 7311-01101-02-02 NUM 2 ENG FUEL CLIP INSP. FOUND AIR OIL HEAT EXCHANGER DAMAGED. // REMOVED NUM 2 ENG AIR OIL HEAT EXCHANGER PER A330 AMM 79-21. INSTALLED NEW AIR OIL HEAT EXCHANGER PER. LEAK CKS GOOD.. REF. AMM 79-21-51 COOLER, OIL-AIR O
- [SDR UIEA2020121402559](https://openairdocs.org/sdr/UIEA2020121402559.md): Gasket · leaking · Dec 14, 2020 · N645GT · Boeing 767324
  > NR 2 ENGINE FUEL LEAK IN IDG FUEL/OIL COOLER LOCATED IN PORT OF FUEL IN. REMOVED AND REPLACED NR 2 ENGINE IDG FUEL/OIL HEAT EXCHANGER "FUEL IN " TUBE GASKET, IAW AMM 24-11-10 PENDING LEAK CHECK. ACCOMPLISHED ENGINE IDLE RUN, IAW 767 AMM 71-00-00, NO LEAKS NO
- [SDR ASAA2020121233687](https://openairdocs.org/sdr/ASAA2020121233687.md): Heat Exchanger · damaged · Dec 12, 2020 · N584AS · Boeing 737890
  > 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 ASAA2020111433556](https://openairdocs.org/sdr/ASAA2020111433556.md): Heater · leaking · Nov 14, 2020 · N467AS · Boeing 737990ER
  > NR 2 ENGINE REQUIRES DEFERRAL FOR FUEL/OIL HEAT EXCHANGER DRAIN FUEL LEAK AT 6 DPM. GROUNDED-YES. REMOVED AND REPLACED NR 2 ENGINE FUEL/OIL HEAT EXCHANGER, REF B737-900 AMM 79-21-02/401. LEAK CHECK GOOD.
- [SDR ASAA2020102933448](https://openairdocs.org/sdr/ASAA2020102933448.md): Heat Exchanger · leaking · Oct 29, 2020 · N403AS · Boeing 737990ER
  > DURING WALKAROUND FOUND NR 2 ENGINE LEAKING FUEL. GROUNDED-YES. DURING INSPECTION FOUND NR 2 ENGINE LEAKING FROM LEFT VSV DRAIN AND MAIN OIL/FUEL HEAT EXCHANGER PAD DRIVE, REF B737-900 AMM 71-71-00. RAN NR 2 ENGINE FOR 5 MINS FOUND MAIN FUEL DRAIN PAD LEAKI
- [SDR UIEA2020101602263](https://openairdocs.org/sdr/UIEA2020101602263.md): Packing · leaking · Oct 14, 2020 · N1321A · Boeing 767306
  > DURING WALK AROUND FOUND NR 1 ENGINE FUEL LEAK. FOUND FUEL OIL COOLER LINE BROKEN. R & R LINE, IAW AMM 24-11-10. LEAK CHECK PENDING. PERFORMED ENGINE WET MOTOR AND ENGINE RUN UP, NO LEAKS NOTED. OPERATIONS CHECK NORMAL, IAW 71-00-00 REF LEAK CHECK ONLY.
- [SDR ASAA2020080532992](https://openairdocs.org/sdr/ASAA2020080532992.md): Heat Exchanger · leaking · Aug 5, 2020 · N531AS · Boeing 737890
  > DURING #1 ENGINE START, NOTICED FUEL LEAKING FROM THE MAIN FUEL/OIL HEAT EXCHANGER. THE LEAKAGE RATE WAS A STEADY STREAM DURING INITIAL ENGINE START. AFTER ENGINE START IT WAS 5 DROPS A MINUTE. AFTER 5 MINUTES IDLE RUN ALL LEAKAGE STOPPED. GROUNDED - YES. REMO
- [SDR HALA2020073100163](https://openairdocs.org/sdr/HALA2020073100163.md): Oil Cooler · leaking · Jul 30, 2020 · N384HA · Airbus A330243
  > ETOPS SIGNIFICANT SYSTEM - #1 ENG LEAKING FUEL FROM AOHE DRAIN LINE. // REPLACED #1 ENG AIR/OIL HEAT EX-CHANGER PER AMM 79-21-57-400-803-A UP TO STEP 4.A.(12),LEAK CHECK PENDING. LEAK CHECK COMPLETED IN REF W/ A330 AMM 79-21-57-400-803-A. NO LEAKS NOTED. T
- [SDR AALA2020070989013](https://openairdocs.org/sdr/AALA2020070989013.md): O-Ring · damaged · Jul 7, 2020 · N917UY · Airbus A321231
  > AIRCRAFT WAS GROUNDED: DURING CLIMB NOTICED LEFT ENGINE OIL QUANTITY DROPPING BELOW 4.0 QUARTS. EVENTUALLY WENT TO 0. 10 MIN LATER OIL PRESSURE SLOWLY DROPPED TO MIN WHICH TRIGGERED ENGINE SHUTDOWN MESSAGE APPEARED ON THE ECAM AND THE PILOT ENGAGED THE NR 1 S
- [SDR UIEA2020031700474](https://openairdocs.org/sdr/UIEA2020031700474.md): Fuel Filter · faulted · Mar 16, 2020 · N1709A · Boeing 767375
  > L ENG FUEL FILT ADVISORY SG AND STATUS MSG ILLUMINATED IN FLIGHT. NO ABNORMAL ENGINE INDICATIONS NOTED.(<P>REMOVED AND REPLACED L ENG FUEL FILTER IAW AMM 73-11-02. LEAK CHECK GOOD.<BR /></P>)
- [SDR SWAA2020031642447](https://openairdocs.org/sdr/SWAA2020031642447.md): Servo · faulty · Mar 12, 2020 · N700GS · Boeing 7377H4
  > LEVELING AT FL30, SE SLOWED TO.74. WHEN ENGINES SPOOLED UP THE #1 ENG STALLED FOR APPROX. 30 SECONDS EGT DID NOT EXCEED 560. HEARD BACK FIRES & FELCT THE STALL. PREFORMED QRH PROCEDURES & ALL INDICATIONS RETURNED TO NORMAL. /
- [SDR ASAA2020021732211](https://openairdocs.org/sdr/ASAA2020021732211.md): Heat Exchanger · leaking · Feb 17, 2020 · N568AS · Boeing 737890
  > FOUND FUEL LEAK ON #1 ENG AT GASKET BETWEEN FUEL-OIL HEAT EXCHANGER AND FUEL PUMP. GROUNDED - YES. REMOVED AND REPLACED THE MAIN OIL/FUEL HEAT EXCHANGER AND TORQUED ATTACHING HARDWARE REF B737-800 AMM 79-21-02/401 LEAK CK GOOD.

Next page: https://openairdocs.org/jasc/7311/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 jasc_code = '7311'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/7311/reports

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