JASC 4940
Service difficulty reports · 1,424
Reports filed under 4940 · APU Start/Ignition System, newest first.
Query with SQL
duckdb -csv -c "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 = '4940' ORDER BY difficulty_date DESC"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 = '4940' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR UIEA2018051400895Ignition Unit · faultyAPU WILL NOT LIGHT OFF. REPLACED APU IGNITION UNIT.SDR UIEA2018051100878Clutch · malfunctionedAPU INOP ER OPERATIONS NOT ALLOWED. REMOVED AND REPLACED CLUTCH ASSY IAW 49-41-06. 49-41-01. OPS CHECKED NUMEROUS TIME. NO FAULTS NOTED.SDR UIEA2018041500703Tru · malfunctionedAPU FAULT. REMOVED AND REPLACED THE APU TRU IAW AMM 24-32-04, OPS CHECKED NORMAL.SDR UIEA2018041400700Starter · inoperativeATTEMPTED TO START THE APU AFTER LANDING. APU FAULTED AND AND THE EICAS MESSAGE ILLUMINATED. R & R THE APU STARTER IAW AMM 49-41-01. OPS CHECKED GOOD.SDR ASAA2018040624163Igniter · failedAPU FAULT LIGHT ILLUMINATED DURING ATTEMPTED START. ACFT GROUNDED, BITE CHECK OF APU REPORTED ONE HISTORY FAULT, 49-41011. NO FLAME SHUT DOWN, AND ONE CURRENT FAULT, 49-31168 FUEL CONTROL UNIT SHOWS OUT OF RANGE HIGH. REMOVED AND REPLACED APU IGNITION UNITSDR ASAA2018040624162Warning Light · false activationAPU FAILED CSS AT FL 360. FAULT LIGHT ON START ATTEMPT. ACFT GROUNDED. PERFORMED FIM 49-30/803. NO FAULTS FOUND. OK FOR SERVICE.SDR FDEA201803310827Battery · failedTRIED TO START THE APU TWICE, NO START. APU FAULT EICAS. OPENED PANEL ON THE E-6 RACK AND NOTICED APU BATTERY COMPARTMENT WAS FULL OF SMOKE AND SMELLED STRONG. CHECKED APU AUX CONT UNIT, NO FAULTS INDICATED. R AND R THE APU BATTERY IAW 24-31-04-4. OPS CHESDR UIEA2018031900427Ignition Unit · malfunctionedAPU FAULT EICAS MESSAGE, ACCOMPLISHED QRH. R&R APU IGNITION UNIT AS PER AMM 49-41-03, OPS CHECKS GOOD, NO FAULTS NOTED.SDR HALA2018031500106Warning System · false activationETOPS SIGNIFICANT SYSTEM - ELECT APU BATT SYS FAULT ECAM. PERFORMED RESET PROCEDURE PER AMI 24-38. NO FAULT NOTED. CK NORMAL.SDR ASAA2018030523775Unknown · malfunctionedFAULT LIGHT ILLUMINATED ON FIRST APU 'COLD SOAKED START' ATTEMPT AT FL 360. APU STARTED NORMALLY ON SECOND ATTEMPT AT FL300. GROUNDED - YES. REF LOGPAGE 11864703 PERFORMED APU BITE CHECK IAW FIM 49-60 TASK 801, FOUND FAULT CODE 49-52017 REVERSE FLOW SHUTDOWN, SDR UIEA2018030200313Apu · faultedAPU FAULTED ON FIRST START ATTEMPT. OPS CHECKED GOOD IAW FIM 49-11, TASK 958.SDR HALA2018022800056Apu · malfunctionedCREW REPORTED THAT DURING TAXI, HAD TWO FAILED START ATTEMPTS FOR THE APU. IAW MOC NO 30 DAY HISTORY OF FAILED START ATTEMPTS OR AUTO SHUT DOWNS. PERFORMED TSM 49-62-00-810-820-A, NO CLASS 1 OR CLASS 2 MESSAGES RELATED TO APU FAULT. RAN APU TWICE WITH LOSDR UIEA2018022700286Ignition Lead · failedAPU INOPERATIVE, DID NOT START. REMOVED AND REPLACED IGNITION LEAD IAW AMM 49-41-04, OPS CHECKED GOOD IAW 49-11-00.SDR F3LA2018021600287Starter · arcedECB FAULT ACTIVATED. REMOVED AND REPLACED ECB IAW AMM-49-61-34-000-003-A. FAULT CLEAR, APU START MOTOR REMAINS FAULTED. REMOVED AND REPLACED APU STARTER ASSY 8KA IAW AMM 49-42-51 AND REPLACED MONITORING WIRE RING TERMINAL. REMOVED AND REPLACED POSITIVE SDR UIEA2018021500227Ecu · failedAPU AUTO SHUTDOWN DUE TO AN OVERSPEED. REMOVED AND REPLACED THE APU ECU IAW AMM 49-31-01. OPS CHECKED GOOD.SDR QXEA2018021300058Igniter · failedAPU FAILED DURING START. SMOKE REPORTED COMING OUT OF THE APU. CLEARED BY INTERROGATED CDS AND FOUND MULTIPLE IGNITER CODES. REMOVED AND REPLACED BOTH IGNITERS A AND B. APU OPS CHECKED GOOD. RETURNED TO SERVICE.SDR AALA201802149012Relay · faultyDURING CLIMB, THE LEFT ENGINE GENERATOR OFF LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURES AND TRIED TO START THE APU, THE APU DID NOT START. EMERGENCY DECLARED, FLIGHT RETURNED TO DEPARTURE, UNEVENTFUL LANDING. MAINTENANCE REPLACED THE LT IDG IAW AMM 24-1SDR QXEA2018020800048Igniter · failedAFTER STARTING APU, GROUND CREW SAW FLAMES COMING FROM APU. IMMEDIATELY SHUT DOWN. REMOVED FROM SERVICE. REMOVED COLLAR & RESET THE CIRCUIT BREAKER. INTERROGATED CDS, FOUND NO CURRENT FAULTS. FOUND BOTH IGNITORS FLAGGED IN FAULT HISTORY. R & R BOTH IGNSDR UIEA2018020500173Igniter · fouledAPU IGNITER PLUG FOULED. REMOVED AND REPLACED THE IGNITER PLUG IAW 49-41-02. OPS CHECKED NORMAL.SDR P5CA2018013000014Motor · failedAPU FAULT EICAS, APU FAILED TO START. REMOVED AND REPLACED THE START MOTOR AND CLUTCH ASSY. APU STARTING OPS TESTED OK IAW AMM 49-41-00 AND 49-41-06.SDR P5CA2018013000015Apu · faultedAPU FAULTED, BITE COMPLIED WITH. APU START ABORTED MESSAGE. SEVERAL SUCCESSFUL. APU STARTS IAW 49-11-00. STARTS WITH NO FURTHER FAULTS.SDR ASAA2018012923322Starter Gen · faultedAPU WOULD NOT START. ACFT GROUNDED. PERFORMED APU BITE PROCEDURES IAW FIM 49-60 TASK 801, FOUND MAINT MESSAGE 49-41012 LOGGED, NO APU ROTATION. PERFORMED TAIL CONE GVI, NO DEFECTS NOTED. REMOVED AND REPLACED THE APU STARTER GENERATOR IAW AMM 49-41-21. APSDR ASAA2018012723323Oil Filter · warning lightFAULT LIGHT ILLUMINATED WHEN STARTING APU, AUTOMATICALLY SHUT DOWN. RESTART ATTEMPTED AFTER 5 MINUTES, FAULT LIGHT RETURNED. ACFT GROUNDED. FOUND APU OIL FILTER DPI TRIPPED. COMPLIED WITH AMM 49-91-13-600-801 INSPECTED MAGNETIC DRAIN PLUG, NO DEFECTS NOTESDR ASAA2018012223271Starter Gen · failedAPU FAULT LIGHT ILLUMINATED AFTER 2 START ATTEMPTS. ACFT GROUNDED. ACCOMPLISHED FIM 49-40 TASK 803, STEPS E. (1)-F.(4). NO FAULTS FOUND. REMOVED AND REPLACED THE STARTER GENERATOR IAW AMM 49-41-21-000-801, AND 400-801 OPS CHECKED GOOD.SDR ASAA2018012223272Unknown · malfunctionedAPU FAILED TO START ON TAXI-IN. GROUNDED - YES. PERFORMED APU BITE PER FIM 49-60 TASK 801. NO FAULTS ON CURRENT STATUS, NO FAULTS NOTED IN FAULT. APU STARTS NORMALLY PER AMM 49-11-00.SDR P5CA2018012200010Starter · failedAPU FAULT ON EICAS, APU FAILED TO START. TROUBLESHOT AND REPLACED THE K197 RELAY IAW FIM 49-11, BLOCK22. BUT PROBLEM CONTINUED. APU ECU BITE SELF TEST PASSED BUT FAULT ON BITE CHANGED AS APU STARTER.SDR FDEA201801170103Contactor · arcedDURING PRE-FLIGHT, ATTEMPTED TO START APU. NOTICED A CHATTERING SOUND, LOUDER THAN NORMAL IN THE MAINTENANCE PANEL. SMOKE ENTERED THE COCKPIT. ALSO RECEIVED A MAIN DECK CARGO SMOKE WARNING, SMOKE ODOR IS ACRID. FOUND APU STARTER CONTACTOR 5KA ARCING. REMSDR UIEA2018011600074Ignition Lead · brokenAPU IGNITER LEAD TIP BROKEN. REMOVED AND REPLACED IGNITION LEAD IAW AMM 49-41-04.SDR AALA201712299001O-Ring · damagedFLIGHT ATTENDANT REPORTED A DIRTY SOCK SMELL IN AFT PORTION OF AIRCRAFT ON DESCENT. APU STARTER LEAKING. REPLACED DAMAGED O-RING FOR APU STARTER MOTOR PER AMM 49-42-51-04-01. FUNCTIONAL CHECKED OK. LEAK CHECKED GOOD. AIRCRAFT WAS GROUNDED.SDR ASAA2017122623012Warning Light · false activationAPU FAILED TO START & A LOW OIL PRESSURE AMBER LIGHT ILLUMINATED. ACFT GROUNDED. VERIFIED APU OIL LEVEL FULL. INTERROGATED FAULTS AND NO DEFECTS NOTED IN HISTORY OR CURRENT FAULTS. COMPLIED WITH APU OPS TEST IAW AMM 49-11-00, OPS TESTED GOOD.SDR HALA2017122600317Unknown · malfunctionedAPU FAULT WHEN ATTEMPTING TO START AFTER LANDING NO START. ACCOMPLISHED BITE OF APU ECU NO MINI FLAGS OK ON LAST TEST END. ACCOMPLISHED FIM 49-11-FAULT TREE 987, ALL OK. ACCOMPLISHED FIM 26-15-00/101 NO FAULTS, STARTED APU AND RAN ALL ELECTRICS AND PACKS. ALL SDR AALA201712269024Seal · leakingAIRCRAFT WAS GROUNDED. PILOT REPORTED CABIN SMELLS BAD. MAINTENANCE FOUND OIL LEAKING FROM APU GENERATOR DRAIN PLUG AND THE APU STARTER. MAINTENANCE REPLACED A BROKEN SEAL ON THE APU STARTER PER AMM 49-42-51 AND REPLACED THE APU GENERATOR PER AMM 24-23-51. A SSDR DALA2017121008484Starter · fireDURING GROUND OPERATION, ACS ALERTED MAINTENANCE TO SMOKE FROM APU AREA. MAINTENANCE OPENED LT APU ACCESS DOOR AND FOUND APU STARTER ON FIRE. CLOSED ACCESS AND BLEW NR 1 FIRE BOTTLE. APU REMOVED AND COMPARTMENT INSPECTED AND CLEANED. NEW APU INSTALLED. A/C WIRSDR AALA201712089033Starter · leakingAIRCRAFT WAS NOT GROUNDED: FUMES IN FLIGHT DECK AND CABIN FORCED RETURN TO PHX. MAINTENANCE FOUND APU AS THE CAUSE, COMPLIED WITH 26L00021001, 26L00021002, 26L00021004, AND PERFORMED SUCCESSFUL OPERATIONAL CHECK. REPLACED APU STARTER PER MM 49-42-51, COMPLIED SDR UIEA2017120502359Ecu · inoperativeAPU FAILED PRIOR TO ENGINE START. REMOVED AND REPLACED INLET GUIDE VANE ACTUATOR PER AMM 49-52-02 NO HELP. REPLACED ECU PER FIM 49-11FT 815 NO HELP. REMOVED AND REPLACED APU PER AMM 49-52-02. OPS CHECK NORMAL.SDR ASAA2017120222751Warning Light · illuminatedAPU DID NOT START ON FIRST ATTEMPT, OVERSPEED LIGHT ILLUMINATED. GROUNDED - YES. VERIFIED NO OTHER FAULTS FOUND PER B737-900 FIM 49-30 TASK 802. SECOND START OPS NORMAL.SDR ASAA2017112922739Exciter · failedAPU WILL NOT START, MAINT MESSAGE 49-41245 "APU START CONVERTER UNIT SHOWS UNDERVOLTAGE". NOTE: SCU CAN BE HEARD NORMALLY FOR APPROX 10 SECONDS UNTIL "NO ROTATION SHUTDOWN" OCCURS AND ASSOCIATED MAINT MESSAGE 49-41042. GROUNDED - YES. REMOVED AND REPLACED IGNISDR ASAA2017112822740Exciter · failedAPU FAULT LIGHT ILLUMINATED DURING APU START. APU DID NOT START. GROUNDED - YES. VERIFIED APU WILL NOT ACCELERATE PAST 12% DURING START. REMOVED & REPLACED APU IGNITION EXCITER. OPS CHECK NORMAL, REF B737-800 FIM 49-40 TASK 805 & AMM 49-41-31-000-801, 49-41-31SDR UIEA2017112002264Starter · defectiveAPU DOES NOT START. REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01. OPS CHECK NORMAL.SDR ASAA2017112622713Ignition Sys · failedFAULT LIGHT ILLUMINATED WHEN ATTEMPTING TO START APU. ACFT GROUNDED. INTERROGATED APU CDU, FOUND FAULT 49-41181, IAW FIM TASK 49-40 TASK 805. REMOVED AND REPLACED THE IGNITION UNIT IAW AMM 49-41-31. APU STARTED, NO CURRENT FAULTS IN CDU.SDR UIEA2017112502293Apu · malfunctionedAPU FAULT EICAS AFTER LANDING. APU FAILED TO START. STARTED APU ON FIRST ATTEMPT IAW AMM 49-01-00, CHECKED GOOD.SDR UIEA2017112002269Ecu · failedAPU INOPERATIVE. REMOVED AND REPLACED APU ECU IAW AMM 49-11-01A. OPS CHECKED GOOD.SDR ASAA2017111622632Exciter · malfunctionedAFTER LANDING APU WOULD NOT START, FAULT LIGHT CAME ON. ACFT GROUNDED. REMOVED & REPLACED APU EXCITER, IGNITION UNIT IAW AMM 49-41-31. OPS CHECKED NORMAL.SDR WX0A201711173295O-Ring · leakingBURNING PLASTIC ODOR DURING DESCENT AND AFTER LANDING. R & R THE APU STARTER O-RING.SDR ASAA2017111422582Ignition Sys · failedSTARTED THE APU, FAULT LIGHT ILLUMINATED. FOLLOWED QRH 7.2 AFTER FAULT LIGHT WENT OUT. ATTEMPTED TO RESTART APU, RECEIVED A FAULT LIGHT AGAIN. ACFT GROUNDED. ACCOMPLISHED FIM 49-40, TASK 802. REMOVED AND REPLACED APU IGNITION UNIT IAW AMM 49-41-31. REMOVED ASDR UIEA2017110802204Ecu · malfunctionedAPU AUTO SHUTDOWN. REMOVED AND REPLACED APU ECU AMM 49-61-05 PERFORMED APU BITE PROCEDURE IAW FIM 49-11 FT 987, PERFORMED ENGINE RUN ON APU POWER IAW AMM 71-00-00, NO FAULTS NOTED.SDR UIEA2017110702190Ecu · malfunctionedAPU FAILED TO START ON LANDING. PERFORMED BITE OF ECU, FOUND NO FAULTS, APU STARTED NORMAL AFTER BLOCK IN. OPS CHECKS APU GOOD IAW AMM 49-11-00.SDR ASAA2017110422434Exciter · failedAPU FAULT ILLUMINATED. ACFT GROUNDED. PERFORMED FIM 49-40, 802. REMOVED AND REPLACED IGNITER PLUG IAW AMM 49-41-51, NO HELP. REMOVED & REPLACED APU IGNITION LEAD, IAW AMM 49-41-52. REMOVED & REPLACED APU IGNITION EXCITER IAW AMM 49-41-31. OPS CHECKED GOOD.SDR ASAA2017092722070Igniter · faultedAPU FAULT LIGHT, RAN QRH AFTER LIGHT EXTINGUISHED, ATTEMPTED START, FAULT LIGHT AGAIN. ACFT GROUNDED. REPLACED THE IGNITER PLUG IAW AMM 49-41-51. REPLACED IGNITION UNIT IAW AMM 49-41-31. APU OPS CHECKED GOOD.SDR ASAA2017092722057Starter Gen · failedAPU POWER FAILED TO CONNECT TO AIRCRAFT. ACFT GROUNDED. REMOVED AND INSTALLED A NEW APU STARTER-GENERATOR IAW AMM 49-41-21-000-801 AND 49-41-21-400-801. OPS CHECKED GOOD.
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