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 P5CA2015081200084Relay · not reportedPERFORM E/O NR: 6749A003, STEP 5.F REPLACED APU START RELAY K197 IAW SWPM 20-81-22 REV 60 AND WDM 49-41-11, REV 9. REPLACED RELAY K197 IAW AMM 49-11-00-802-002, REV 112. PERFORMED APU STARTING AND OPS TEST AND THE RESULT WAS SATISFACTORY.SDR ASAA2015080712783Warning Light · illuminatedCSS APU INCOMPLETE. ATTEMPTED FL380/FL310, FAULT LIGHT ILLUMINATED-AUTO SHUTDOWN. START AFTER LANDING SUCCESSFUL. ACFT GROUNDED. BITE CHECKED APU-NO FAULTS. ACCOMPLISHED NORMAL APU START. CONTINUE MEL 49-99A.SDR ASAA2015080512748Warning Light · illuminatedAPU START FAULT LIGHT ILLUMINATED ON START ATTEMPT. ACFT GROUNDED.SDR ASAA2015080412733Warning Light · false activationAPU FAULT LIGHT ILLUMINATED ON START ATTEMPT. LIGHT EXTINGUISHED WITHIN 1 MINUTE OF PLACING IN "OFF" POSITION. ACFT GROUNDED. STARTED APU, NO FAULTS NOTED. NORMAL START. NO HISTORY WITHIN 90 DAYS. ACFT OK FOR SERVICE.SDR UIEA2015073000387Ignition Unit · malfunctionedAPU WILL NOT START, APU FAULT EICAS DISPLAYED. TRANSFERRED TO MEL 49-11-01B. R & R APU IGNITION UNIT IAW AMM 49-41-03. OPERATIONS CHECKED GOOD.SDR ASAA2015071812484Warning Light · false activationDURING APU CSS ATTEMPT AT FL 380, FAULT LIGHT ILLUMINATED. FAULT LIGHT EXTINGUISHED WITHIN 5 MINS. QRH ACCOMPLISHED AT FL 340 APU SUCCESSFULLY STARTED. ACFT GROUNDED. BITE CHECK OF APU ECU SHOWS ONE OCCURRENCE OF FAULT CODE 49-41010. NO PREVIOUS HISTORY 90 SDR ASAA2015071012392Fault Light · false activationDURING TAXI IN, TRIED TO START APU AND RECEIVED A FAULT LIGHT. ACFT GROUNDED. PERFORMED FIM TASK 49-60, TASK 802. FOUND CURRENT STATUS CLEARED, INTERMITTENT FAULT CORRECTED.SDR ASAA2015070412331Circuit Breaker · out of positionON PREFLIGHT INSPECTION, APU SCU FAN POWER CIRCUIT BREAKER WAS FOUND OUT. ACFT GROUNDED. INSPECTED THE CIRCUIT BREAKER & PANEL AREA, NO DEFECTS NOTED, RESET SAME. ACCOMP APU START, SCU CHECKS NORMAL REF 49-41-61.SDR ASAA2015070312330Apu · malfunctionedAPU FAULT LIGHT ILLUMINATED ON START ATTEMPT. RAN QRH. WAITED 5 MINUTES. FAULT LIGHT WENT OUT. TRIED A SECOND START AND FAULT LIGHT RE-ILLUMINATED. ACFT GROUNDED.SDR ASAA2015070312329Exciter · failedAPU FAULT LIGHT ON START. LOW OIL PRESSURE. ACFT GROUNDED. APU BITE WAS PERFORMED REF FIM 49-60, TASK 801, 2 FAULT CODES FOUND 49-31175 & 49-41011, R & R IGNITER LEAD & IGNITER IAW MM 49-41-52-000-801/400-801 AND MM 49-41-57-000-801. R & R IGNITION UNIT IASDR ASAA2015062912270Warning Light · illuminatedFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT, FL370. ACFT GROUNDED.SDR ASAA2015061512101Exciter · failedON TAXI IN, APU WOULD NOT START AND "FAULT" LIGHT ILLUMINATED. ACFT GROUNDED. ACCOMPLISHED APU BITE PROCEDURE IAW 49-60, TASK 801. FOUND MAINTENANCE MESSAGE 49-41011, "NO FLAME SHUTDOWN". ACCOMPLISHED FAULT, ISOLATION TASK 49-40, 802. FAULT 49-41011 WAS DISSDR HALA201506160111Starter · bindingFOUND APU STARTER MOTOR DRAGGING AND FUSE FTN 6KA1 LOW. REPLACED WITH NEW FUSE IAW AMM 49-42-00-960-801A THRU STEP 4B. REMOVED STARTER MOTOR IAW AMM 49-42. INSTALLED NEW APU STARTER IAW MM 49-42. OPS CHECKED NORMAL.SDR ASAA2015061012063Converter · inoperativeATTEMPTED SEVERAL APU STARTS, APU WOULD NOT FIRE OFF. RECEIVED AN AMBER FAULT LIGHT ON ALL ATTEMPTS. CURRENT STATUS SHOWS MAINTENANCE MESSAGE 49-41251. ACFT GROUNDED. COMPLIED WITH TROUBLESHOOTING IAW FIM 49-40, TASK 812. REPLACED APU START CONVERTER UNIT ISDR P5CA2015060900048Starter · failedAPU CANT START, ZERO RPM, BITE-STARTER MESSAGE. R & R APU STARTER MOTOR, C/W BITE TEST IAW AMM 49-61-05, TEST OK, C/W APU STARING TEST MM 49-11-00, OPS CHECKED NORMAL.SDR ASAA2015060812029Converter · faultedAPU FAULT LIGHT ILLUMINATED DURING APU START IAW QRH, WAITED 5 MINUTES LIGHT EXTINGUISHED AFTER ABOUT 3:30 MINUTES. SECOND START NORMAL AND SUCCESSFUL. OAT 36C. ACFT GROUNDED. DURING START APU CURRENT STATUS FAULTS 49-41251 SCU SHOWS HIGH TEMPERATURE. REPLACSDR ASAA2015052111834Warning Light · illuminatedAPU FAULT LIGHT ON START ATTEMPT APU WOULD NOT START. ACFT GROUNDED. UNABLE TO CONFIRM FAULT, STARTED APU NUMEROUS TIMES, APU CURRENT FAULT PAGE & FAULT HISTORY PAGE SHOW NO FAULTS. ACCOMPLISHED APU GROUND FUNCTIONAL CHECK REF FIM 49-40, TASK 803, CDU DISPLSDR CA150525016Spring · failed(CAN) APU FAIL CAUTION LIGHT ILLUMINATED DURING START ATTEMPT. APU WILL NOT START. APU STARTER GENERATOR REPLACED & APU STARTED OKAY. DURING SHOP TEAR DOWN INSPECTION OF THE STARTER GEN SHORTING & BURNING FOUND IN SPRING HOLDER & SPRING BRUSH LEADS RESULTINSDR ASAA2015051211710Warning Light · false activationAPU FAULT LIGHT ILLUMINATED ON OUT AND THAN EXTINGUISHED AFTER APROX 30 SECONDS. APU HAD BEEN OFF FOR SEVERAL MINUTES. APU STARTED, SHUTDOWN, AND RESTARTED. ALL NORMAL. APU OPS NORMAL. APU VOLT AND FREQUENCY NORMAL. ACFT GROUNDED. PERFORMED APU BITE TEST SDR ASAA2015050211609Apu · faultedWHILE PERFORMING AN APU START AT FL 340 FOR A CSS ON RELEASE THE APU FAULT LIGHT ILLUMINATED WITH AUTOMATIC SHUTDOWN AFTER RUNNING THE QRH PROCEDURE THE FAULT LIGHT EXTINGUISHED APPROXIMATELY 4 MINUTES LATER SECOND ATTEMPT 10 MIN LATER ALSO PRODUCED FAULT LIGHSDR ASAA2015042911580Sensor · faultedATTEMPTED TO START APU AT FL360 FOR A CSS ON RELEASE- FAULT LIGHT ILLUMINATED WITH APU AUTOMATIC SHUTDOWN. WE RAN QRH PROCEDURE AND FAULT LIGHT WENT OUT AFTER ABOUT 1 MINUTE. DESCENDED TO FL 300 AND STARTED APU WITH NO PROBLEMS. SECOND START WAS APPROXIMATESDR ASAA2015041811385Power Unit · failedAPU FAILED TO START AFTER LANDING. FAULT LIGHT ILLUMINATED. ACFT GROUNDED. ACCOMPLISHED TECH SERVICE REQUEST. ALL CONNECTORS CHECKED OK. REPLACED BOTH START POWER UNIT AND START CONVERTER UNITS. ALL OPS NORMAL, GROUND VERIFICATION SATISFACTORY. IAW MM 49-4SDR ASAA2015041511365Ecu · faultedAPU FAILED TO START ON GROUND ILLUMINATION OF APU FAULT LIGHT. ACFT GROUNDED. ACCOMPLISHED FIM 49-60, TASK 801, APU BITE. NO CURRENT FAULT. MESSAGES 49-41012, NO ROTATION (4X) AND NO FLAME (2X) LOGGED. ACCOMPLISHED FIM TASKS 49-40 802 & 803. NO FAULTS FOUNSDR ASAA2015040411230Apu · failedAPU FAULT LIGHT ILLUMINATED DURING START ATTEMPT. ACFT GROUNDED. R & R APU IAW TASK CARD 78349010. OPS CHECK IAW AMM 49-11-00-710-801. OPS & LEAK CHECKED GOOD. WHILE 49-99A APPLIED, APU FAULT LIGHT ILLUMINATED ON START RAN QRH WAITED 5 MINS LIGHT WENT OUT SDR ASAA2015032811156Exciter · failedAPU FAULT LIGHT ON TAXI IN WAS ON MORE THAN 5 MIN, THEN EXTINGUISHED. ACFT GROUNDED. REPLACED APU EXCITER IGNITION BOX IAW NG AMM 49-41-31-000-801 FOR REMOVAL AND AMM 49-41-31-400-801 FOR INSTALLATION. REPLACED APU IGNITER PLUG LEAD IAW AMM 49-41-52-000-801 SDR CALA2015033093490Starter · faultyAPU ALTITUDE NO START, COLD SOAK. APU HANGS BETWEEN 0 - 19% DURING START, 3 ATTEMPTS, ALL THREE FAULTED, MAX RPM WAS 26. R & R APU STARTER IAW AMM 49-41-01.SDR ASAA2015032511123Warning Light · false activationFAULT LIGHT ILLUMINATED DURING APU START AT FL380. FAULT LIGHT EXTINGUISHED WITHIN 5 MINUTES. SUCCESSFUL START AT FL340, NO APU CAUTION LIGHTS. ACFT GROUNDED. ACCOMPLISHED FIM TASK 49-40-TASK 801. FOUND FAULT 49-41010-1 START AGO. NO CURRENT FAULTS SHOWINSDR 2015FA0000108Starter · failedATTEMPTED START OF APU. NO START. INSPECTION OF APU STARTER NOTED HOLE BURNED THROUGH STARTER CASE. REMOVED STARTER AND PERFORMED INSPECTION ON WIRING, TRU, AND APU START CONTACTOR. NO OTHER DAMAGE OR ARCING NOTED. SUSPECT INTERNAL SHORT AND ARCING INSIDE STASDR BWVR201503200002Clamp · disengagedDURING ROUTINE MX, ONE OF OUR TECHNICIANS WAS TASKED TO TAKE A SOAP SAMPLE FROM THE ACFT APU. WHILE TAKING THE SAMPLE HE NOTICED THE APU STARTER GEN WAS LOOSE. AFTER FURTHER INVESTIGATION HE FOUND THE CLAMP THAT SECURES THE STARTER GEN TO THE APU WAS SAFETIESDR ASAA2015031710996Exciter · failedAPU FAILED TO START. ACFT GROUNDED. R & R THE APU IGNITION UNIT REF AMM 49-41-31. OPS CHECK NORMAL.SDR P5CA2015031100015Igniter · wornIGNITOR PLUG FOR APU IS WORN. REPLACED IGNITER PLUG IAW AMM 49-41-02-004-001.SDR ASAA2015030310842Converter · failedAPU FAULT LIGHT AND MAINTENANCE LIGHT. ACFT GROUNDED. R & R THE APU STARTER GENERATOR UNIT REF AMM 49-41-21. ETOPS SIGNIFICANT ITEM PART VERIFIED. NO FIX, PROBLEM REMAINS. APU STARTER GENERATOR STILL REQUIRES AN OPS CHECK AND LEAK CHECK. PLEASE PERFORM AMSDR ASAA2015030110819Converter · failedAPU INOPERATIVE: MAINT MGS 49-41251 START CONVERTER UNIT SHOW HIGH TEMPERATURE NO APU ROTATION SHUTDOWN. ACFT GROUNDED. REMOVED, REPLACED, AND TESTED START CONVERTOR UNIT IAW MM 49-41-61-400-801. TESTS PASSENGER ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SDR 9JLA201502268404Adapter · brokenTHE FLIGHT CREW REPORTED THAT THE APU FAILED TO START AFTER LANDING, INDICATING A FAULT ON THE CONTROL PANEL. TROUBLESHOOTING IDENTIFIED THAT THE STARTER GEN DRIVE ADAPTER PN 3861055-1 FAILED. THE BROKEN DRIVE ADAPTER WAS REMOVED & A NEW ADAPTER INSTALLED.SDR CALA2015013093041Unknown · malfunctionedAPU DID NOT START AT ALTITUDE, START OK ON GND. COMPLETED FIM 49-43 TASK 805 STEPS C 5 - C 7 D 1 & 2. ACTION PRECAUTION CHANGED PRSOV, PRESS CONTROLLER & PRESS SENSOR. NO ACTIVE OR LATCHED MSGS.SDR DALA2015012800682Starter · failedREPORTED ELECTRICAL ODOR IN CABIN DURING PUSHBACK. MAINTENANCE FOUND APU STARTER ON FIRE. MAINTENANCE PUT OUT FIRE WITH PORTABLE FIRE EXTINGUISHER, PULLED AND COLLARED APU CONTROL AND STARTER CIRCUIT BREAKERS. APU REMOVED AND COMPARTMENT CLEANED. APU, LT ASDR ASAA2015011810284Exciter · failedTRIED TO START APU FAULT LIGHT ON. FAULT CODE 49-41011. ACFT GROUNDED. REMOVED APU IGNITION UNIT IAW MM 49-41-31-000-801. INSTALLED NEW APU IGNITION UNIT IAW MM 49-41-31-400-801. APU OPS CHECKED OK. COMPLETED MM 49-41-31-400-801.SDR QXEA2015011400012Igniter · failedAPU FAIL AFTER APU START ATTEMPT. SHORTLY AFTER, ODOR OF UNBURNED FUEL PRESENT IN FLIGHT DECK. FUEL FOUND LEAKING OUT OF APU CLAMSHELL DOORS. FOUND MULTIPLE INSTANCES OF FAULT 54-2, IGNITOR PLUG A AND IGNITOR PLUG B LOGGED IN CDS. INPSECTED PLUGS IAW AMM TSDR CA141222005Armature · damaged(CAN) APU STARTER GENERATOR WAS RECENTLY REMOVED FOR A DEFECT APU WILL NOT CRANK AND THEN ROUTED TO THE LOCAL REPAIR OVERHAUL SHOP. DURING THE SHOP TEAR DOWN INVESTIGATION IT WAS NOTED THAT INTERNAL SHORTING/BURNING TO BRUSHES/COMMUTATOR AND FIELD WINDINGS-BRUSDR ASAA2014112809781Exciter · failedAPU WOULD NOT START, THREE ATTEMPTS. ACFT GROUNDED. REPLACED EXCITER IAW AMM 49-41-31-400-801. APU OPS CHECK NORMAL.SDR CALA2014111401451Starter · unserviceableAPU FAILED TO START IN FLIGHT AT 10,000. TRIED START ON GND AND WAS SUCCESSFUL. ENTERED FOR CREW 0037705 COMPLIED WITH MEL IAW 4911C & AMM 24-25-00-710-001-A REPLACED STARTER IAW AMM 49-41-01-402-013. REPLACED DEOILER VLV IAW AMM 49-27-08-404-011, OPERATIONSDR HALA2014111100190Exciter · failedAPU FAILED TO START AT GATE. R & R APU EXCITER UNIT IAW AMM TASK 49-41-03-404. OPS CK OK. OK FOR SERVICE.SDR ASAA2014111009633Exciter · failedDURING FIRST ATTEMPT TO START APU FAULT LIGHT ILLUMINATED. QRH PROCEDURE, WAITED 5 MINUTES, FAULT LIGHT WENT OUT. ON SECOND ATTEMPT LIGHT RE-ILLUMINATED AND APU DID NOT START. ACFT GROUNDED. R & R IGNITION PLUG IAW AMM 49-41-51. R & R IGNITION LEAD IAW AMM SDR UIEA2014110600564Igniter · wornAPU IGNITER PLUG WORN BEYOND LIMITS. INSTALLED NEW APU IGNITER PLUG. OPERATIONS GOOD IAW AMM 49-41-02.SDR ASAA2014103009547Ignition Sys · malfunctionedAPU FAULT LIGHT ILLUMINATED ON START NO LIGHTOFF, TWO START ATTEMPTS. ACFT GROUNDED. PERFORMED FIM 49-40, TASK 803, NO FAULTS NOTED. FAULT CORRECTED IAW STEP E.12, D.SDR HALA2014102600175Lead · failedSMOKE COMING OUT BY THE APU PANEL. RUBBER LEAD COVERS OF STARTER WERE SMOKING. REPLACED STARTER MOTOR IAW AMM 49-44-01. REPLACED STARTER CLUTCH AS A PRECAUTION IAW AMM 49-44-03. OPS CHECKED OK.SDR ASAA2014101409384Warning Light · false activationAPU FAULT LIGHT ILLUMINATED DURING START. ACFT GROUNDED. INTERROGATED CPU, FOUND FAULT CODE 49-41251, START CONVERTER UNIT SHOWS HIGH TEMP. NO HISTORY LAST 90 DAYS. ACCOMPLISH TASK 49-40, TASK 812, THROUGH STEP E. 4, 2 TIMES. DID NOT GET EITHER FAULT CODE 4SDR ASAA2014100509306Igniter Box · malfunctionedAPU FAULT LIGHT DURING START ATTEMPT. ACFT GROUNDED. VISUAL INSPECTION ACCOMPLISHED AND IS SATISFACTORY. REPLACED IGNITION UNIT IAW AMM 49-41-31-000-801 IAW ENGINEERING.SDR ASAA2014100209294Warning Light · false activationAPU FAULT LIGHT ANNUNCIATED. ACFT GROUNDED. TESTED APU SYSTEM IAW FIM 49-40, TASK 802. ALL TESTS PASSED. NO MAINT HISTORY WITHIN 30 DAYS.SDR CA140923007Armature · broken(CAN) A BOMBARDIER Q 400 APU THE STARTER GENERATOR WAS REMOVED FOR SCHEDULED BRUSH AND BEARING REPLACEMENTS AND ROUTED TO THE REPAIR OVERHAUL SHOP. DURING THE SHOP TEAR DOWN INVESTIGATION IT WAS NOTED THAT A SEGMENT FROM THE ARMATURE HAD BROKEN OFF AND THE INT
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