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 UIEA2012031500093Apu · faultedAPU FAULT ON START. PERFORMED APU BITE PROCEDURE IAW FIM 49-11-00/103, NO FAULTS NOTED. RESET ECU, APU START NORMAL ON SECOND ATTEMPT.SDR UALA2012030801517Relay · faultyAPU WILL NOT START, 3 ATTEMPTS, FAULT LIGHT CYCLED, NOTHING HAPPENED. REPLACED RELAY K197 AND K117, GROUND CHECKED OK.SDR ASAA12511152Converter · faultyFOLLOW UP TO APU FAULT LIGHT ON REPORTING. ACCOMPLISHED APU BITE PER FIM 49 60 00 810 801 NO CURRENT STATUS FAULTS RECORDED. FAULT HISTORY SHOWED TWO FAULTS: 4 STARTS OLD 49 41012 "APU NO ROTATION SHUTDOWN". 5 STARTS OLD 49 41012 "APU NO ROTATION SHUTDOWN"SDR UIEA2012021700053Igniter · unknownAPU IGNITOR PLUG TO BE REPLACED AS PRECAUTION DUE TO SLOW START. R & R APU IGNITOR PLUG IAW AMM 49-41-02 & NBSP; OPS CHECKED GOOD.SDR ASAA1251088Unknown · malfunctionedAPU MAINT LIGHT ON AFTER SUCCESSFUL APU START AFTER LANDING. COMPLETED APU BITE PROCEDURE 49 60 00 GOT FAULT MSG 49 41010. COMPLETED FIM TASK 49 40 00 810 801. NO MAINT MSG DID NOT RE-OCCUR. RESTARTED APU SEVERAL TIMES NO APU FAULT LIGHTS OR MESSAGES. VISSDR UALA2012020300671Unknown · malfunctionedAPU NO START AFTER LANDING, SHOWED MAINT MSG 49-1 1290. PER FIM49-52T808 TRIED TO START APU WITH EXTERNAL PNEUMATIC SOURCE. NO HELP. APU ONLY REACHING ABOUT 25% AND 450EGT BEFORE AUTO SHUT DOWN OCCURS. CYCLED APUC C-B S AMIS C-B S & INSPECTED APU CHECK VALVSDR ASAA12510992Unknown · malfunctionedTRIED TO START APU AFTER LOSS OF GROUND POWER. APU DIDN'T START AND HAD FAULT LIGHT. NO DAMAGE NOTED AT APU EXHAUST AREA. ACCOMPLISHED APU BITE TEST REF FIM TASK 49 60 00 801 801 NO FAULT NOTED OPERATED APU SEVERAL TIMES WITH LOAD OPS NORMAL.SDR MYWA120005Unknown · malfunctionedETOPS SIGNIFICANT SYSTEM: APU FAULT LIGHT ON START. MAINT MESSAGE 49-31016, OVERTEMP SHUT DOWN. PERFORMED BITE TEST OF APU IAW 737-800 FIM 49-60 TASK 801. FOUND MESSAGE 49-1010, 49-31016. ACCOMPLISHED T/S IAW 737-800 FIM 49-40 TASK 801. OPS CHECKS NORMALSDR UALA2012011600352Starter · faultyAPU CONTROL STATUS MSG. MSG 49-10760 REPLACED ELECTRIC STARTER PER MM, OPS GOOD. STARTED APU 3 TIME WITH NO FAULTS AND MSG NOT ACTIVE.SDR UALA2012010900203Charger · failedAPU BATTERY TEST FAILS. REPLACED APU BATTERY CHARGER IAW AMM, OPS CHECKED OK.SDR ASAA12510903Exciter · failedRAMP REPORTS APU DID NOT START LAST NIGHT. FOUND MAINT. MSG: 49 41180 49 11019 49 11021 AND 49 91007. FOR FLT 49 41180 ATTEMP 1 APU START AND VER APU BEGINS START SEQUENCE. NO SNAPPING OR EGT RISE NOTED. ACOMP FIM49 40 00 810 804. REPLACED APU IGNITION UNSDR ASAA12510881Starter Gen · faultyAPU WOULD NOT START GOT A FAULT & MAINTENANCE LIGHT. FAULT CODE 49 41244 GENERATOR FAIL. REPLACED STARTER GENERATOR REF AMM 49 41 21. OPS AND LEAK CHECKED GOOD. APU BITE CHECK GOOD NO FAULTS NOTED REF AMM 49 61 00 700 801.SDR UALA2011122107046Starter · faultyAPU WILL NOT START AFTER 3 TRIES APU ON STATUS PAGE. REPLACED APU STARTER TO CORRECT, OPS CHECKED NORMAL.SDR UALA2011121506883Relay · faultyAPU WILL NOT START. HANGS BETWEEN 0-10% RPM. SHUTSDOWN WITH APU FAULT LIGHT ON. REFER TO MM-49-61-00, CODE B1. NO POWER BEYOND MAIN CONTACTOR, NO POWER TO CONTROL SIDE OF CONTACTOR. REPLACED RELAYS K117 & K197, AND APU CONTROLLER. APU START OKAY.SDR HNAA2011121300425Contactor · failedAPU WARNING LIGHT AND APU STARTER LIGHT ILLUMINATED, WHILE APU WAS RUNNING AND AFTER NR 1 ENGINE START. MX VERIFIED APU CONTACT WAS NOT WELDED. MX INSPECTED APU AND COMPARTMENT. NO DEFECTS NOTED. R & R APU START CONTACTOR IAW MM 24-31-09. OPS CHECKED GOOSDR UALA2011121206812Controller · malfunctionedAPU CONTROLLER DETECTED FAULT THAT WOULD CAUSE AUTOMATIC SHUTDOWN OF APU IN UNATTENDED MODE OPERATION, OR COMPLETE LOSS OF APU CONTROLLER BUSS ACTIVITY (BOTH L AND R 629) FOR 3 SECONDS AFTER THE APU MASTER CONTROL SWITCH HAS BEEN IN THE ON POSITION FOR TEN SECSDR MYWA110126Starter Gen · faultyETOPS SIGNIFICANT SYSTEM: APU FAULT ON 2 START ATTEMPTS MAINT LIGHT ALSO. T/S APU FAULT IAW FIM 49-60 TASK 801 FOUND STARTER/GENERATOR AT FAULT. REMOVED AND REPLACED APU STARTER GENERATOR IAW B737-800 M/M 49-41-21 OPS CHECK NORMAL.SDR QXEA2011112801250Igniter · malfunctionedAPU AUTO SHUTDOWN OCCURED DURING START ATTEMPT - GROUND SERVICES ADVISED A LARGE AMOUNT OF SMOKE WAS SEEN FROM APU TAIL PIPE DURING THE START ATTEMPT. PLACED APU ON MEL 49-00-1. REPLACED APU IGNITOR PLUGS IAW MM TASK 49-40-04-000-801 AND 400-801. OPS CHECKEDSDR SIMA201132910Unknown · malfunctionedTRIED TO START THE APU WITH THE GPU. THE APU DID NOT START & THEN A BURNING SMELL WAS PRESENT IN THE COCKPIT. RESET GPU. STARTED APU IAW EMB GHC. NO DEFECTS NOTED.SDR CA111123010Current Limiter · overheated(CAN) SCHEDULED A CHECK INSPECTION, DURING A VISUAL INSPECTION OF THE LT DC CONTACTOR PANEL SIGNS OF OVERHEATING WERE OBSERVED ON THE OUTGOING TERMINAL & WIRE OF CURRENT LIMITER, PN ANL300. THIS CURRENT LIMITER IS FOR THE APU STARTER GENERATOR CIRCUIT & IS PASDR UALA2011111506258Starter · leakingFOUND LEAK ON APU CLUSTER. FOUND OIL LEAKING FROM ELECTRIC STARTER. 1EA 651-0308, 7514051 LOB 891-14. 1EA 6510308, 751-4051 ISSUED MM. REPLACED STARTER MOTOR PER MM, NO LEAKS NOTED.SDR ASAA11510659Exciter · faultyAPU FAIL TO START WITH FAULT LIGHT ILLUMINATING. ACCOMPLISHED FIM 49 40 00 810 802. VERIFIED FAULT 49 41011 STILL ACTIVE. APU GOES THROUGH START SEQUENCE DOOR OPEN CRANKING AND FUEL FOG AT TAILPIPE BUT NO IGNITION SOUND NOTED. REPLACED APU EXCITER REF MM49SDR UIEA2011110700641Starter · failedAPU WILL NOT START. R & R APU STARTER IAW MM 49-41-01. OPS CHECK OK. NO LEAK NOTEDSDR UALA2011110706055Igniter Box · faultyAPU START SYS STATUS MESSAGE. APU IS RUNNING AND USEABLE. APU IGNITER BOX ON ORDER OSTF U3444. REPLACED IGNITER BOX, OPS CHECK GOOD.SDR UALA2011110706054Plug · burnedNR 1 AND 2 APU IGNITER PLUGS BURNED FROM ARCING. INSTALLED NEW PLUGS.SDR UALA2011110706053Lead · burnedNR 1 AND 2 APU IGNITER CABLE ENDS AT IGNITER PLUG BURNT FROM ARCING. INSTALLED NEW LEADS 1 AND 2 PER MM.SDR UALA2011110305960Starter · faultyAPU CONTROL STATUS MESSAGE. REPLACED ELECT STARTER, OPS CHECK NORMAL.SDR ASAA11510568Unknown · malfunctionedON GROUND STARTED APU & EGT CLIMBED TO 1000 & THE FAULT LIGHT CAME ON. ACCOMPLISHED FIM TASK 49 40 00 810 801 PG 2 &3 STEP 26 A D LOGGED FAULT 49 41010 FROM ORIGINAL DEFECT. ACCOMPLISHED 4 APU STARTS A/C AND D/C NO FAULTS LAGGED. A/C CLEARED FOR SERVICE.SDR ASAA11510567Unknown · malfunctionedAPU PUT ON LINE TO ELECTRICALLY POWER AIRCRAFT INITIALLY HOLDS THE LOAD BUT SLOWLY SEE FREQUENCY DETRIORATE FROM 395 CPS TO AS LOW AS 375 WHEN IT TRIPPED ELECTRICALLY OFF THE LINE APU DOES NOT SUPPLY BLEED AIR FOR PACK USE. CDU SHOWED FAULT 49 41011 FOR ONE ISDR UALA2011100505410Igniter · faultyAPU FAULT LIGHT STAYS ON WHEN ATTEMPTING START. NO TIME TO WORK. -INF- :RESET FAULTS ON ECB. RESTART ATTEMPT FAILED. ECU FAULTS "NO FLAME". PARTS: 265-0040 305766-1 (IGNITER). 671-0049 53109-3 (LEAD). 671-0050 MR49410 (EXCITER).SDR CA111004008Igniter · cracked(CAN) APU IGNITER PLUG, WAS FOUND CRACKED ON THE END SHELL BETWEEN THE TIP AND THREADED PORTION. THE DEFECT WAS DISCOVERED DURING THE SCHEDULED MX CHECK OF THE APU IGNITER AND WAS REPLACED.SDR ASAA11510452Power Unit · faultyDURING APU START ON EXT PWR O/BS'D BATTERY DISCHARGE LT "ON". VIS INSP'D START CONVERTER & START POWER UNITS IN E & E. OBS'D APU START CONV UNIT C/B ON P91 115VAC TRANSFER BUS 1 OUT (A 11). REPLACED START POWER UNIT MM 49 41 71 000 801 & 400 801. APU START SDR ASAA11510451Starter Gen · faultyJUST PRIOR TO PUSHBACK APU "MAINT" LIGHT ILLUMINATED. AFTER APU SHUTDOWN "FAULT" LIGHT ILLUMINATED ALSO. CDU FAULT HISTORY SHOWS CODES 49 41244 "GEN DIODE FAIL" AND 49 11019 DC POWER LOSS SHUT DOWN. PERFORMED FIM TASK 49 40 TASK 806. REPLACEMENT OF STARTERSDR UALA2011092005079Relay · faultyAPU WON'T START. REPLACED APU CRANK CONTACT OR RELAY PER MM. APU START NORMAL.SDR MYWA110096Ignition Unit · malfunctionedETOPS SIGNIFICANT ITEM: APU FAULT LIGHT ILLUMINATED DURING TAXI IN. REMOVED AND REPLACED APU IGN UNIT, IGNITOR PLUG, & IGNITOR PLUG LEAD IAW AMM 49-41-31, 49-41-51 & 49-41-52. OPS CHECK OK.SDR HALA2011082900394Starter · failedETOPS SIGNIFICANT SYS - APU WILL NOT START, FAULT LIGHT ILLUMINATED. PERFORMED APU BITE IAW FIM 49-00-00 STARTER CIRCUIT FAULT. R & R APU STARTER IAW AMM 49-41-01, PB 401. PERFORMED OPS CK SATISFACTORY.SDR UALA2011082604577Switch · faultyDUE TO REPORTS OF APU STARTING DIFFFICULTIES AND CREW REPORTS THAT THE ROTARY START SWITCH BINDS, PLEASE REPLACE THE APU START SWITCH WITH REFERENCE TO BOEING STANDARD PRACTICES MANUAL FOR RMVL & INSTALLATION OF ELECTRICAL SWITCHES & SAFETY PRACTICES. IPC 49-SDR UALA2011082304509Unknown · malfunctionedAPU FAILED TO START. RESTARTED APU. NO FAULTS.SDR UALA2011082204477Battery · faultyAPU WON'T START. REPLACED APU BATTERY PER AMM. APU STARTS GOOD AND SYSTEM CHARGING GOOD.SDR MYWA110082Starter Gen · malfunctionedETOPS SIGNIFICANT SYSTEM: APU MAINT AND FAULT LIGHTS ON WHEN STARTING APU. REMOVED AND REPLACED APU STARTER GENERATER IAW B737-800 AMM 49-41-21 APU STARTING & OPERATION OK NO LEAKS NOTED AT THIS TIME IAW AMM 49-11-00. A/C GOES BACK TO ETOPS STATUS.SDR UALA2011080103978Battery · failedAPU WILL NOT CRANK. REPLACED BATTERY PER MM, OPS CHECKED NORMAL.SDR UALA2011080103923Ignition Sys · failedAPU WILL NOT START. REPLACED IGNITION UNIT.SDR UALA2011072203741Exciter · faultyAPU FAULT ON START. BITE APU BOX, 2 MSG LATCHED, NO FLAME LIGHT-OFF, CLEARED MSG AND TRY RESTART, NO JOY. GOT 30 PERCENT THEN APU FAULT STATUS MSG. EXCITER FAULTY.SDR UALA2011072103709Starter · inoperativeAPU WON'T START PRIOR TO DEPARTURE. APU SPEED DID NOT REACH 7 PERCENT, CAUSED AUTO SHUT-DOWN, MUST ACCOMPLISH FIM 49-40 TASK 812, A BATTERY DISCHARGE OF APPROX 100 AMPS IS NECESSARY FOR ELECT. STARTER MOTOR TO TURN ABOVE 7 PERCENT SPEED, IF ELECT. STARTER MSDR ASAA11510016Starter Gen · faultyAPU FAILS TO START. FAULT LIGHT ILLUMINATED. ACCOMPLISHED FIM TASK 49 40 TASK 806 FOUND FAULT CODE 49 41244 LOGGED. REPLACED APU STARTER GENERATOR PER M/M 49 41 21 SYSTEM, OPS CHECKS NORMAL.SDR UALA2011070503278Igniter · faultyCREW REPORT: APU INOP. NO START 3 TIMES IN A ROW. CREW REPORT: APU INOP. NO START 3 TIMES IN A ROW SAMC TEXT: APU LAST LEG REPORT AND SHUT DOWN REPORTS SHOW IGN UNIT 8030KM AND FUEL CONTROL 8022KM, RESET L41 AND L42 NO HELP. LCL MAINT COMPLIED WITH MEL4SDR QXEA2011060800413Starter Gen · failedTHE APU WAS RUNNING AND THE AIRCRAFT WAS USING THE APU GEN FOR POWER. THE GROUND CREW NOTICED BLUE SMOKE AND A PLASTIC BURNING SMELL COMING FROM THE APU THE GENERATOR HAD GONE OFF LINE. SHUT THE APU DOWN. PLACED THE APU ON MEL 49-00-1. REPLACED APU STARTERSDR UALA2011051302365Ignition Sys · malfunctionedAPU SHUTDOWN APU AUTO-SHUTDOWN HAS OCCURRED. REFERENCE LOGIC DESCRIPTION FOR DETAILS. ADVISORY CREW COMMENTS: ELEC AND AIR START FAIL MSG-4910440 INACTV ER MODE MSG-4907940 INACTV ER MODE. FOUND FOLLOW PRESENT LEG MESSAGE:49-12970,49-07940,49-10440. REPLACEDSDR UALA2011050902306Exciter · failedAPU FAILED TO START. BITE CHECK SHOWS IGN. NEED IGN UNIT EXCITER PER 757AMM. APU STARTED NORMALLY.SDR UALA2011050202157Starter · failedAPU WILL NOT START. STARTER WOULD NOT ENGAGE CHECKED FADEC. FOUND REVERSE FLO MESSAGE CLEARED. STILL NO START. APU DID NOT START 4 TIMES, APU NOT CRANKING. REPLACED APU STARTER PER AMM AND REPLACED APU CRANK CONTACTOR PER AMM. DID APU BITE TEST AND RAN APU T
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