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 UIEA2017040700526Igniter · failedAPU COLD SOAK START ATTEMPT UNSUCCESSFUL TWICE. ATTEMPTED APU COLD SOAK START AFTER TWO HOURS AT FL 410. APU SHUT DOWN TWICE AFTER REACHING APPROXIMATELY 750 EGT. FAULT LIGHT ILLUMINATED. REMOVED AND REPLACED THE APU IGNITER PLUG, OPS CHECKED OK IAW AMM 4SDR HALA2017032800080Ecu · faultedAPU RAN FOR 5 MINUTES, THEN SHUT DOWN WITHOUT A FAULT, RESTARTED, RAN FOR 5 MINUTES THEN SHUT DOWN WITH A FAULT LIGHT. PREFORMED APU BITE CHECK IAW AMM 49-61-05. FOUND ECU FAULT. REMOVED AND REPLACE APU ECU IAW AMM 49-61-05. BITE TEST OK. OPS OK. OK FOR SERVSDR HALA2017032800083Ecu · faultedAPU RAN FOR 5 MINUTES, THEN SHUT DOWN WITHOUT A FAULT, RESTARTED, RAN FOR 5 MINUTES THEN SHUT DOWN WITH A FAULT LIGHT. PREFORMED APU BITE CHECK IAW AMM 49-61-05. FOUND ECU FAULTED. REMOVED AND REPLACED THE APU ECU IAW AMM 49-61-05. BITE TESTED OK. OPS OK. SDR UIEA2017030600304Starter · inoperativeAPU WILL NOT START ON GROUND 22-24 RPM MAXIMUM, NO ACCELERATION. ACCOMPLISHED FIM 49-11, F/T 960. R & R THE APU STARTER IAW AMM 49-41-01. APU OPS CHECKED GOOD.SDR HALA2017022100041Igniter · faultyDURING PREFLIGHT APU FAULT AUTO SHUT DOWN. REMOVED AND REPLACED BOTH APU IGNITION PLUG REF AMM 49-41-38. OPS CHECKED GOOD.SDR P5CA2017020500056Starter · damagedAPU FAULT EICAS MESSAGE ON APU START ATTEMPT. APCU SHOWS STARTER MEMORY AND FOUND STARTER HEAT DAMAGE, REPLACED STARTER THEN APU OPERATION CHECK OK IAW AMM 49-41-01</P>)SDR ASAA2017020219673Starter Gen · faultedAFTER LANDING, AND ON APU START, A MAINT LIGHT FOLLOWED BY A FAULT LIGHT AFTER IT WAS SHUTDOWN. ACFT GROUNDED. REMOVED AND REPLACED THE APU STARTER GENERATOR IAW AMM 49-41-21-400-801. OPS AND LEAK CHECKED GOOD. NO FURTHER FAULTS OR DEFECTS NOTED. GROUND VERSDR ASAA2017012119487Unknown · malfunctionedAPU INOP. GROUNDED - YES. MULTIPLE STARTS, SUCCESSFUL. APPLIED APU BLEED AIR AND OTHER LOADS, SUCCESSFUL. NO HISTORY. OK FOR SERVICE.SDR ASAA2017011219383Starter Gen · failedAPU GENERATOR NO FREQ OR VOLTS-GENERATOR FAILED. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR, REF AMM 49-41-21. OPS TEST GOOD, BITE TEST NO FAULTS FOUND. THIS CLEARS MEL 49-1B.SDR ASAA2016121219026Converter · failedAPU MAINTENANCE AND FAULT LIGHT CAME ON DURING SHUTDOWN OF THE APU. RAN THRU QRH, LIGHTS WENT OUT. AFTER LANDING, ATTEMPTED TO START THE APU AND THE SAME TWO LIGHTS CAME ON. ACFT GROUNDED. REMOVED AND REPLACED START CONVERTER. START CONVERTER INSTALLATION OPSSDR UIEA2016121301013Brushes · wornSTARTER BRUSHES FOR APU WORN BEYONG LIMITS. REMOVED AND REPLACED APU STARTER IAW AMM 48-41-01.SDR ASAA2016120618962Converter · faultedTRIED APU START AND RECEIVED A MAINT & FAULT LIGHT. START UNSUCCESSFUL. ACFT GROUNDED. REMOVED & REPLACED APU START CONVERTER IAW AMM 49-41-61. REMOVED AND REPLACED APU STARTER GENERATOR IAW AMM 49-41-21. OPS CHECKED GOOD IAW AMM 49-41-61. COMPLETED OPS CHECSDR ASAA2016112818875Starter Gen · failedMAINTENANCE LIGHT ILLUMINATED DURING APU START, ON THE GROUND. ACFT GROUNDED. REMOVED AND REPLACED APU STARTER GENERATOR IAW AMM 49-41-21. WHILE PERFORMING OPS CHECK FOUND AFTER CLEARING PREVIOUS FAULT, APU WOULD NOT START. FAULT LIGHT CAME ON AND FAULT CODSDR HALA20161013365Igniter · fouledETOPS SIGNIFICANT SYSTEM, ON APU START AFTER LANDING HAD ECAM APU FAULT AUTO SHUTDOWN LOG-PAGE. TROUBLESHOT PER TSM 49-62-00-810-808-A. REMOVED AND REPLACED LOWER IGNITER PLUG, PLUG APPEARED FOULED. OPS CHECK GOOD PER AMM 49-00. CONTACTED MC FOR VERIFICATISDR UIEA2016101200805Igniter · failedAPU FAULT AFTER LANDING.. REMOVED AND REPLACED IGNITOR AND OPS CHECK OK IAW AMM 49-41-02 & 49-11-00.SDR ASAA2016092718141Generator · failedFAULT LIGHT DURING APU START. ACFT GROUNDED. REMOVED & REPLACED APU STARTER GENERATOR, IAW AMM 49-41-21. OPS AND LEAK CHECKED GOOD.SDR ASAA2016092718140Warning Light · false activationAPU FAILED TO START ON 1ST ATTEMPT. LOW OIL PRESSURE LIGHT NEVER WENT OUT, STARTED ON SECOND TRY. ACFT GROUNDED. PERFORMED BITE TEST OF APU, NO FAULT NOTED, ALSO RUN APU, OPERATIONAL WAS NORMAL.SDR HALA2016092500357Igniter · failedAPU FAULT. PERFORMED BITE OF APU IAW FIM TASK 49-11 TREE 993. FOUND NO LIGHT OFF ON BITE. REMOVED AND REPLACED IGNITOR PLUG IAW AMM 49-41-02. OPS CHECKED OK. OK FOR SERVICE.SDR HALA201609190356Starter · inoperativeAPU WILL NOT START. REMOVED AND REPLACED THE STARTER MOTOR IAW AMM 49-42. OPS AND LEAK CHECKED GOOD. OK FOR SERVICE.SDR ASAA2016090317917Converter · failedAPU FAULT LIGHT ON TAXI IN. RAN CHECKLIST & WOULD NOT START. ACFT GROUNDED. R & R APU START CONVERTER UNIT, IAW AMM 49-41-61-401. OPS CHECKED GOOD.SDR 2016F00180Starter · damagedAIRCRAFT WAS BEING PREPARED FOR DEPARTURE. APU WAS STARTED AND APPROXIMATELY 5 MINUTES LATER, THE APU FIRE INDICATION ACTIVATED AND THE FLIGHT CREW PULLED THE APU FIRE
T-HANDLE. THE APU FIRE BOTTLE HAD ALREADY AUTOMATICALLY ACTIVATED. UPON INSPECTION OF THSDR UIEA2016082500702Starter · defectiveAPU BATTERY DISCHARGE EICAS MESSAGE AND OVERHEAD LIGHT ON, AFTER GLIDESLOPE CAPTURE, TRANSFERRED TO MEL 49-11-01B, CAT-B MDDR 69615. R & R APU STARTER REF AMM 49-41-01, MDDR CLEARED, NR 69615, OPS CHECK.SDR UIEA2016082400700Relay · faultyAPU BITE MESSAGE, ACFT START CIRCUIT MINI FLAG 34 T/S IAW FIM 49-11, FT 991, EXAMINED ECU DH08B PIN J10 TO POSITIVE STARTER TERMINAL M893 NO FAULTS NOTED. CHECKED V ON K117 TERMINAL X1 AND FOUND VOLTAGE BETWEEN 21V AND 23V , REPLACED K197 , R & R APU STARTER SDR DALA2016082106147Exciter · failedFAILED APU COLD SOAK START, APU STARTED ON THE FIRST ATTEMPT, BUT DID AN AUTO SHUTDOWN, APU WOULD NOT LIGHT OFF ON ALL 3 ATTEMPTS. REPLACED THE IGNITION EXCITER.SDR ASAA2016081217680Warning Light · false activationAPU WOULD NOT START. FAULT LIGHT ILLUMINATED. ACFT GROUNDED. FAULT HISTORY SHOWS MAINT. MESSAGE 49-41180 IGNITION UNIT SHOWS HIGH CURRENT. PERFORMED GVI ON APU WIRING HARNESS AND WIRING CHECKS BETWEEN P3 CONNECTOR AND P13 CONNECTOR. CHECKED GOOD IAW FIM 49-4SDR AALA201608059014O-Ring · leakingAS THE ON GOING CREW AS SOON AS I WALKED ON THE AIRPLANE I NOTICED THE DIRTY SOCK ODOR. APU WAS ON, WITH THE PACKS. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND THE APU LEAKING OIL FROM THE STARTER AND REPLACED THE O-RING IAW AMM 49-42-51. A SATISFACTORY LEAK SDR HALA2016073100312Exciter · malfunctionedAPU INFLIGHT START AT FL 410, OAT -60 WAS UNSUCCESSFULL AFTER 3 ATTEMPTS. REMOVED AND REPLACED THE APU IGNITION EXCITER IAW AMM 49-41-38. OPS CHECKED OK. VERIFICATION FLIGHT FOR APU COMPLETED. APU OPERATES NORMALLY. VERIFICATION OF COLD SOAK START VERIFSDR DALA2016073005682Starter · smokeFLIGHT EXPERIENCED SMOKE COMING FROM THE APU COMPARTMENT AFTER ARRIVAL. THE PASSENGERS DEPLANED NORMALLY THROUGH THE L1 DOOR. MAINTENANCE FOUND THE APU STARTER SMOKING AND GLOWING. MAINTENANCE USED THE GROUND BASED FIRE EXTINGUISHER TO SECURE APU COMPARTMENT.SDR HALA2016072200294Ecu · malfunctionedAPU DID NOT START, TWICE. PERFORMED APU BITE PER FIM 49-11FT 958. ECU FAULT NOTED. REMOVED AND REPLACED APU ECU IAW AMM 49-61-05. APU STARTED NORMALLY ON FIRST ATTEMPT. OK FOR SERVICE. OPS NORMAL.SDR HALA2016072000288Ecu · failedAPU WOULD NOT START. FAULT LIGHT ILLUMINATED EGT 780, RPM 17. SECOND ATTEMPT SAME RESULT. PERFORMED APU ECU BITE TEST AND FOUND MINI FLAG 02. REMOVED AND REPLACED APU ECU IAW AMM 49-61-05. PERFORMED AN ECU BITE TEST IAW FIM 49-11-00, NO FAULTS NOTED AND APUSDR HALA2016071900285Warning Light · false activationAPU FAULT LIGHT ON DURING START ATTEMPT. PERFORMED APU ECU BITE IAW FIM 49-11-00 NO FAULTS NOTED. VERIFIED APU OIL LEVEL, INDICATED FULL. VISUALLY INSPECTED APU NO DEFECTS NOTED. APU STARTED NORMALLY ON FIRST ATTEMPT. ALL OPS NORMAL. OK FOR SERVICE.SDR AALA201607189003Packing · leakingAIRCRAFT WAS GROUNDED. FLIGHT CREW REPORTED A CABIN ODOR DESCRIBED AS A DIRTY SOCK ODOR CAUSING THE PASSENGERS AND CREW TO BE NAUSEOUS. MAINTENANCE FOUND THE APU STARTER LEAKING OIL AND REPLACED A DEFECTIVE O-RING PACKING IAW AMM 49-42-51. A SATISFACTORY LESDR ASAA2016071617399Exciter · failedAPU FAULT LIGHT ILLUMINATED, FAILED TO START. ACFT GROUNDED. REMOVED AND REPLACED APU IGNITION EXCITER IAW AMM 49-41-31. OPS CHECKED GOOD.SDR ASAA2016071317366Exciter · failedAPU FAULT LIGHT ILLUMINATES DURING START. ACFT GROUNDED. REMOVED AND REPLACED EXCITER IGNITION UNIT IAW AMM 49-41-31.SDR ASAA2016071017332Ignition Unit · failedAPU START UNSUCCESSFUL ON TAXI IN. FAULT LIGHT OBSERVED. ACFT GROUNDED. TROUBLESHOOT IAW FIM 802, NO FLAME SHUTDOWN. FOUND INOPERATIVE IGNITION SYS, R & R IGNITION UNIT IAW AMM 49-41-31. R & R APU PLUG & LEAD IAW AMM 49-41-00. APU OPS CHECK NORMAL.SDR ASAA2016070517277Exciter · failedAPU FAULT LIGHT ON DURING START. ACFT GROUNDED. ACCOMPLISHED FIM TASK 49-40 TASK 802 AS REQUIRED. FOUND APU EXCITER, CONNECTOR, AND LEAD BAD. REMOVED AND REPLACED EXCITER IGNITION UNIT IAW AMM 49-41-31. REMOVED AND REPLACED IGNITER CONNECTOR IAW AMM 49-41-SDR AALA201607049004Master Switch · defectiveAIRCRAFT WAS GROUNDED: DURING TAXI OUT ANOTHER AIRCRAFT REPORTED FIRE / FLAMES COMING FROM THE APU EXHAUST. THE FIRE DEPARTMENT EXTINGUISHED FLAMES AND THE AIRCRAFT SAFELY RETURNED TO THE GATE. APU HAD BEEN SHUT DOWN AFTER ENGINE START SEVERAL MINUTES EARLIER.SDR HALA2016062100242Exciter · faultyETOPS SIGNIFICANT SYSTEM, APU AUTO SHUTDOWN 3 TIMES. R & R EXCITER-IGNITION, 59KA10 REF AMM 49-41-38-0401. OPS CHECK GOOD.SDR ASAA2016061417039Ignition Unit · failedDURING APU START, FAULT LIGHT ILLUMINATED. ACFT GROUNDED. R & R IGNITER PLUG, REF AMM 49-41-51/401, NO FIX. R & R IGNITION UNIT, REF AMM 49-41-31/401. OPS CHECKS GOOD AT THIS TIME.SDR DALA2016061504799Unknown · malfunctionedCREW REPORTED APU WOULD NOT START. MAINTENANCE FOUND EVIDENCE OF AN APU STARTER FIRE. NO FIRE EXTINGUISHER DISCHARGED. REPLACED APU, START RELAYS, ECU, SHIPS BATTERIES AND CHARGER. INSPECTING ALL START CIRCUIT CABLES AND CONNECTIONS FOR HIGH RESISTANCE, HESDR ASAA2016053016896Module · failedATTEMPTED CSS ON APU AT FL 340. FIRST ATTEMPT: FAULT LIGHT ILLUMINATED. SHUTDOWN APU WAITED 5 MINUTES BEFORE ATTEMPTING A SECOND START. SECOND ATTEMPT, FL340: APU EGT REACHED 1,000+ C AND FAULT LIGHT ILLUMINATED. WE SHUT THE APU DOWN, CONSULTED WITH MAINTENSDR UIEA2016053100361Exciter · defectiveAPU WILL NOT START, NO IGNITION. R & R EXCITER & IGNITION PLUG IAW AMM 49-41-03, 49-41-04 & 49-41-02. OPERATIONS CHECKED OK IAW AMM 49-11-00.SDR QXEA2016052000340Igniter · faultedPU FAIL ON LIGHT UP. ALSO NOTICED FUEL SPILLED ONTO RAMP AFTER LIGHT UP FAIL. RAMPERS NOTICED FUEL MISTING AND FUEL ODOR ON RAMP. CHECKED CDS FOR FAULT CODES, FOUND FAULT 55-2 IGNITER PLUG B OPEN. C/W FIM TASK 49-40-00-810-803 FOR FAULT ISOLATION. R & R BSDR ASAA2016051816794Exciter · failedON FIRST APU START ATTEMPT AT GATE GOT APU FAULT LIGHT. ACFT GROUNDED. CONFIRMED FAULT, APU WILL NOT START. APU BITE SHOWS FAULT MESSAGE 49-41180, IGNITION UNIT CIRCUIT HIGH CURRENT". ACCOMPLISHED FIM 49-40, TASK 804, TROUBLESHOT TO DEFECTIVE APU EXCITER USDR ASAA2016051716774Igniter · failedWHILE PERFORMING TSR 908005, FAULT CODE 49-41011 DISPLAYED ON APU BITE CHECK AND FAULT LIGHT ILLUMINATED. ACFT GROUNDED. DURING APU START UP NO NOISE HEARD FROM THE IGNITER PLUG. REPLACED IGNITER PLUG AND APU IGNITION UNIT REF AMM 49-41-51 AND 49-41-31. OPS SDR ASAA2016051516756Igniter · failedAPU FAULT LIGHT CAME ON AT ATTEMPTED START. ACFT GROUNDED. REPLACED IGNITER PLUG AND APU IGNITION UNIT IAW AMM 49-41-51 AND 49-41-31. OPS TEST GOOD, BITE CHECKED GOOD.SDR ASAA2016051016689Warning Light · false activation1ST ATTEMPT ON APU START AFTER LANDING GOT AN APU FAULT LIGHT. RAN QRH TURNED OFF APU SWITCH. AFTER APPROX 3 MIN LIGHT EXTINGUISHED. STARTED APU NORMALLY ON SECOND ATTEMPT. ACFT GROUNDED. FOUND FAULT 49-41254 LOGGED IN HISTORY. FOLLOWED FIM 49-40 TASK 82SDR ASAA2016050716641Exciter · failedAPU FAULT LIGHT DURING STAT. RAN QRH AND WAITED 4 MINUTES; LIGHT EXTINGUISHED. TRIED RESTART AND FAULT LIGHT ILLUMINATED AGAIN. ACFT GROUNDED. INTERROGATED CDS FOR APU FAULTS, FOUND MESSAGE 49-41011 NO FLAME SHUTDOWN. FOLLOWED FIM 49-40-00-810-802. REPLACSDR ASAA2016042716550Converter · failedDURING APU START MAINTENANCE MESSAGE 49-41250, START CONVERTER UNIT SHOWS START SYSTEM INOPERATIVE. FOUND 18 LOGGED FAULTS OF THIS MESSAGE. ACFT GROUNDED. PERFORMED FIM TASK 49-40, TASK 811. R & R APU START CONVERTER UNIT, INSTALLATION TEST PASSED, REF AMM SDR ASAA2016042416542Exciter · failedAPU FAILED TO START, SHUTDOWN WITH A FAULT LIGHT. ACFT GROUNDED. REPLACED IGNITION UNIT REF AMM 49-41-31. GROUND VERIFICATION CHECKS NORMAL. THIS CLEARS MEL 49-1B.
Back to JASC 4940