JASC 4997
Service difficulty reports · 226
Reports filed under 4997 · APU System Wiring, 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 = '4997' 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 = '4997' 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 CA140919002Wire · failed(CAN) DURING TROUBLESHOOTING OF AN INOPERATIVE AUXILIARY POWER UNIT (APU) ASSOCIATED WITH AN APU FAULT CAUTION MESSAGE, SIGN OF OVERHEATING CONDITION WAS NOTICED AT THE APU STARTER POSITIVE ELECTRICAL LUG. AIRCRAFT DEFERRED IN ACCORDANCE WITH MEL 49-10-01-1.SDR ASOA2014102711498Cover · damagedAPU STARTER POWER CABLES ABRADABLE SHEATH TORN. WRAPPED APU POWER CABLES WITH ELECTRICAL INSULATING TAPE IAW GREO 670-24-22-001, REV A. COMPLIED WITH GREO REO 670-24-22-001, REV A DATED 11-25-2010. REPAIRED APU POWER OUTPUT CABLE IAW REO 670-24-22-001, REVSDR ASOA20140820089RSWire Harness · shortedSUP: ORIGINAL REPORT SDR PILOT REPORTED AN APU GENERATOR FAIL MESSAGE WITH STRONG ELECTRICAL ODOR. MAINTENANCE R & R APU ELECTRICAL HARNESS ASSY, OPS CHECKED GOOD. ACFT WAS APPROVED FOR RETURN TO SERVICE.SDR ASAA2014080608770Wire Harness · failedWHILE OPERATING PACKS, APU PRESSURE HAD BEEN NORMAL THEN DROPPED TO 15 PSI WITH NO SWITCH MANIPULATION. ACFT GROUNDED. REPLACED APU WIRE HARNESS AND OPS NORMAL IAW AMM 49-11-01.SDR UIEA2014062200247Connector · dirtyAPU DID NOT START ON GND. OIL LEVEL WITHIN LIMITS, BITE IAW FIM 49-11, FT 958, IGN UNIT LIGHTED. CLEANED CONNECTOR D40245 & CONNECTOR ON M1 IGNITER UNIT, FAULT CLEARED. STARTED NORMAL, OPERATIONS CHECKED NORMAL AT THIS TIME. CONNECTOR CLEANED IAW SWPM 20-00SDR SWIA201438386Relay · failedELECTRICAL ODORIN THE COCKPIT. R & R APU FEEDER PROTECTION RELAY, APU FEEDER PROTECTION RELAY STAND AND APU START CONTACTOR. OPS CHECK GOOD AT THIS TIME.SDR HNAA2014060200169Contactor · burnedAPU FAIL LIGHT ILLUMINATED DURING START. AUX AND MAIN CIRCUIT BREAKERS TRIPPED. SMOKE, FIRED BOTTLE. FOUND APU START CONTACTOR WELDED. COLLARED CIRCUIT BREAKER. R & R APU START CONTACTOR AND SMALL CABLE ASSY, EGT, SWAP HARNESS IAW BULLETIN 49-8. OPS CHECSDR UIEA2014051700198Connector · dirtySTATUS MSG APU LP 1 DISPLAYS INTERMITTENTLY. PERFORMED TROUBLESHOOTING. CLEANED & INSPECTED CONNECTORS, RECONNECTED IAW AMM 26-15-02, FIM 26-15-00, FAULT TREE 803 & SWPM 20-60-01. NO FAULTS PRESENT AT THIS TIME.SDR VNAA2014050100001Oil System · lowCREW REPORTED APU OIL PRESSURE CAUTION MESSAGE IN FLIGHT. CREW FOLLOWED QRH PROCEDURE, DIVERTED AND LANDED SAFELY. MAINTENANCE INSPECTED AND TROUBLESHOT APU AND FOUND APU OIL LEVEL LOW. MAINTENANCE SERVICED APU OIL AND PERFORMED CHECKS IAW AMM. ACFT RELEASSDR R61A201404210572Terminal · corrodedDURING HEAVY CHECK, TERMINAL END APU ESC HAS BROKEN INSULATOR AND IS CORRODED. MX R & R TERMINAL END APU ESC IAW W206-00002-00N, SWPM 20-21-10. PN MS25036-132, TERMINAL END. AIRCRAFT REMAINS UNTIL HEAVY CHECK IS COMPLETED.SDR CALA2014041790857Connector · brokenAPU SHUT DOWN AT GATE TWICE. BIT APU CONTROL BOX, GEN FILTER ILLUMINATED. CHECKED DIFF PRESS SW & FILTER, NO DEFECTS NOTED. R & R GEN CHIP DETECTORS, NO METAL FOUND. FOUND GEN DIFF SW CONNECTOR BACK SHELL CONNECTOR BROKEN & SAFETY WIRE BROKEN. CHECKED ABOVESDR ASAA2014020906814Connector · dirtyDURING APU START ATTEMPT, APPEARED TO HAVE NO EGT RISE FOLLOWED BY AN AMBER FAULT LIGHT, ATTEMPTED SECOND START AFTER WAITING 5 MIN ALLOWING FAULT LIGHT TO GO OUT. SECOND ATTEMPT HAD SAME RESULT. ACFT GROUNDED. DISCONNECTED & INSPECTED CONNECTOR P22 ON APU FUSDR USAA2013082300009Wire · chafedMX REPORTED EVIDENCE OF CHAFED WIRE/ELECTRICAL ARCING DURING APU START SWITCH REPLACEMENT. MX REPAIRED WIRE CHAFING IAW STANDARD PRACTICES WIRING MANUAL 20-10-13. ACFT OK FOR CONTINUED SERVICE.SDR CALA2013081990502Connector · dirtyFUEL VALVE APU EICAS & STATUS MESSAGE. CLEANED VALVE DV28031 CONNECTOR AND SECURED, EICAS STATUS MESSAGE CLEARED, NO EXISTING FAULTS. OPERATED APU TWO CYCLES WITH NO FAULT MESSAGES.SDR UALA2013071204904Connector · dirtyAPU FUEL VALVE EICAS AND FAULT LIGHT. CLEANED CONNECTOR ON APU SHUTOFF VALVE. OPERATED APU SEVERAL TIMES, OPS CHECKED GOOD.SDR HNAA2013070900401Contactor · shortedAPU FAILED AUX CIRCUIT BREAKER N-8 TRIPPED. MX INSPECTED FIRE BOTTLE STILL CHARGED. NO OBVIOUS DEFECTS OR DAMAGE NOTED. R & R APU START CONTACTOR, RESET CIRCUIT BREAKER N8. OPS CHECKED GOOD. FOUND CONTACTOR SHORTED.SDR UIEA2013061700332Connector · dirtyAPU AUTO SHUTDOWN TWICE DURING PUSHBACK. REMOVED AND CLEANED OIL PRESSURE SWITCH CONNECTOR, OPERATED APU IN FULL LOAD AND UNLOADED CONDITIONS, ALL OPS NORMAL.SDR RAIA201305040001Wire Harness · faultyDURING CRUISE FLIGHT THE APU FAILED. AIRCRAFT RETURNED TO STL. MAINTENANCE INSPECTED AND REMOVED AND REPLACED THE APU WIRING HARNESS. AUP OPS CHECKED GOOD.SDR DXTA2013043005365Ground Stud · failedAPU WOULD NOT START. TESTED APPROPRIATELY, ALL LIGHTS WORKING, BUT WHEN THE MASTER SWITCH WAS POSITIONED TO "START," NOTHING HAPPENED. IMMEDIATELY AFTERWARDS, THERE WAS A STRONG ELECTRICAL ODOR IN THE APU COMPARTMENT. FOUND APU GENERATOR GROUNDING CABLE ON ASDR UALA2013032701973Connector · dirtyAPU CONTROL STATUS MESSAGE DISPLAYED ON LOWER EICAS. FOUND SPEED SENSOR NR 2 CIRCUIT FAILED AND SPEED SENSOR NR 2 LOWER THAN SENSOR 1. CLEANED AND SECURED SPEED SENSOR 2 CONNECTOR IAW AMM 49-61-02. RAN APU TEST, NO FAULTS.SDR UALA2013022601155Connector · dirtyCREW REPORTED APU DOOR STATUS MESSAGE DURING TAXI OUT. CYCLED APU MASTER SWITCH, MESSAGE REMAINS. ACCOMPLISHED BITE CHECK OF CONTROLLER, NO MESSAGES, CLEANED CONNECTOR ON APU DOOR ACTUATOR. ACCOMPLISHED THREE APU STARTS. NO MESSAGE FOUND, OPS CHECKED GSDR HALA2013013100014Connector · dirtyAIR TURNBACK, APU AUTO SHUTDOWN, APU VERIFICATION UNSATISFACTORY. ECU BIT INDICATES "HIGH TEMP" WITH MINI FLAGS 11, 45 & 48. PERFORMED MEGGER TEST FOUND NR 2 THERMOCOUPLE CIRCUIT FAULTY WITH HIGH RESISTANCE. ISOLATED FAULT ON CONNECTOR D4082J, PIN 29 AND 30SDR UALA2013012200398Circuit Card · failedAPU FAILED TO START. APU STARTED THREE TIMES AT GATE WITH NO FAULTS AT THIS TIME. CHECKED CHIP DETECTORS ALL LOOKED GOOD. OIL FILTER BYPASS VALVE SWITCH LUBE CLUSTER CIRCUIT IS SHORTED. INSTALLED APU.SDR UALA2013012100325Connector · fouledECAM MESSAGE APU AUTO SHUTDOWN DISPLAYED ON UPPER ECAM SCREEN - APU. APU AUTO SHUTDOWN DURING START ON TAXI IN. :"RE-SET" "OPS CHECK OK" HAS MADE THIS ITEM-C. APU ASD W.O. BITE MSG REF: TSM 490000-810-992-A (POSSIBLE WATER INGRESS IN PANEL 121AL). REMOVED ISDR CA121204001Wire Harness · damaged(CAN) UNRECOGNIZED HARNESS CONFIGURATION, THE BELOW MENTIONED HARNESS, PW901A, WAS RECEIVED FOR MAINTENANCE. FOLLOWING INSPECTION SEVERAL DISCREPANCIES WERE NOTED IN TERMS OF DIFFERENCES WITH THE DWG HARNESS, PN 3912235-01, SN CAL001. THE FOLLOWING ARE ALSO SDR UALA2012112106736Wire · openAPU FAULT-BITE EICAS MSG. ACP WIRING CHECKS FOUND OPEN WIRE FROM APU FIREWALL CONN D4024P POS 5 TO THE DE-OILER SOL CON P11 POS 1 WITH DIODE FORWARD AND REVERSED BIASED. CREATED NEW SMC.SDR DXTA2012101105141Lead · burnedTHE APU WAS OPERATING AND BLEED AIR WAS ENGAGED, PRESSED THE ENGINE START BUTTON FOR NR 2 ENGINE, AFTER FUEL WAS INTRODUCED DURING THE START, THE APU DROPPED OFFLINE AND OUR ENGINE AVIONICS SCREENS MOMENTARILY WENT BLANK. DETECTED A FAINT ODOR OF SMOKE. AFSDR CA121004007Wire · chafed(CAN) ON DEPARTURE CLIMBOUT PASSING THROUGH 25,000 FT APU FIRE CAS ILLUMINATED INTERMITTENTLY THEN STEADY. CREW COMPLETED THE CHECKLIST PROCEDURE AND FIRE LIGHT EXTINGUISHED AFTER 20 SECONDS. CREW DECLARED AN EMERGENCY AND RETURNED TO LAND WITH FIRE SERVICESSDR ASAA2012091992917Connector · unsecureAPU WILL NOT START. APU BITE TEST SHOWS MX MESSAGE 49-41254 START CONVERTER UNIT SHOWS START SYS INOPERATIVE. ACCOMPLISHED FIM 49-40-00-810-821. FOUND STARTER GENERATOR WIRE HARNESS CONNECTOR D11118P NOT SEATED PROPERLY. TIGHTENED CONNECTOR, APU STARTS NORMSDR UIEA2012090100372Connector · dirtyAPU & FAULT, "0" OIL QUANTITY. PERFORMED APU OIL QTY TRANSMITTER INSPECTION IAW AMM TASK 49-94-04/206-006 AND CLEANED AND RESEATED ELECTRICAL CONNECTOR, SERVICED APU OIL TO FULL, APU STARTED AND RAN NORMAL, LEAK CHECKED GOOD, OK FOR SERVICE.SDR ASAA2012080492660Connector · dirtyCSS FAILED WITH FAULT AUTO SHUTDOWN. FAULT LIGHT WENT OUT AFTER 3 MINUTES. FOUND FAULT CODE 49-41010 THAT WAS 2 STARTS OLD UNDER FAULT HISTORY. UNDER CURRENT STATUS THERE WAS NO FAILURES. STARTED APU 2 TIMES & NO DISCREPANCIES NOTED. ACCOMPLISHED FIM TASKSDR HALA2012072700184Ground Stud · arcedETOPS SIGNIFICANT SYS - UPON APU START, ARCING WAS NOTICED AT APU BATTERY GROUNDING STUDS/LUGS. REPLACED GROUND LUG IAW SWPM 20-30-11. R & R APU BATTERY GROUND BRACKET AND STUD ASSY SECURITY CK GOOD.SDR SWIA201231207Connector · defectiveSMOKE WAS IN THE COCKPIT AND AN ODOR CONSISTENT WITH ELECTRICAL OVERHEAT. (FLT 5481) REPLACED 1 CONNECTOR ON SENSING WIRE FOR APU CONTACTOR IN REFERENCE TO EMB 120 WDM.SDR MYWA201204100040Circuit Breaker · malfunctionedAPU WOULD NOT START. CYCLED APU START CIRCUIT BREAKER : OPS CHECKED GOOD, NO FURTHER ACTION REQUIRED IAW MM 49-00-00.SDR ASAA12511280Wire Harness · faultyAPU HAS A HISTORY OF FAULT LIGHTS AND MAINTENANCE LIGHTS WITH A VARITY OF FAULT MESSAGES. REPLACED APU WIRE HARNESS ALL OPS NML, REF MM 49 11 01 49 61 00 49 11 00.SDR UALA2012032201818Wire · damagedAPU SHUT DOWN. FOUND WIRE FROM PIN A12 CONNECTOR DM7847CA TO CONNECTOR D95004 PIN E SHORT TO SHIELD. ALSO SEVERAL WIRES IN SAME HARNESS FOUND DAMAGED. RPL'D APU BAY HARNESS W7242 AND CLAMPS WDM AND MM. APU START, RUN, AND SHUTDOWN NORMAL.SDR HNAA2012022800629Terminal Block · burnedCREW STATING THAT THERE WAS A NON ELECTRICAL ODOR IN COCKPIT. MX INSPECTED COCKPIT. NO ODOR DETECTED. ODOR COMING FROM APU POWER CABLES & STUD AT FWD BULKHEAD. DEACTIVATED APU START CONTACTOR IAW SP.P 49.1. NO ODOR WITH ENGINES RUNNING & APU DEACTIVATED .SDR MYWA120023Connector · misinstalledETOPS SIGNIFICANT SYSTEM: APU FAULT LIGHT ON AND WILL NOT START. T/S PER B737 FIM 49-30 TASK 801 FOUND CONNECTOR AL0675B IMPROPERLY INSTALLED IN LT MLG WHEEL WELL. RE-INSTALLED CONNECTOR. APU OPS CHECKED GOOD PER B737 AMM 49-11-00. APU FUEL SHUT OFF VASDR MYWA120026Connector · misinstalledETOPS SIGNIFICANT SYSTEM: APU INLET DOOR ACTUATOR FAILED IN OPEN POSITION. TROUBLESHOT PER B737-800 FIM 49-10 TASK 806 FOUND CONNECTOR AL0675B IMPROPERLY INSTALLED IN LT MLG WHEEL WELL PROPERLY INSTALLED CONNECTOR APU INLET OPS CHECKED GOOD PER B737-800 FIM SDR ASAA12511089Connector · dirtyDURING PREFLIGHT "FAULT LIGHT" ON APU WAS FOUND ILLUMINATED. CLEANED AND INSPECTED INLET SENSOR WIRING AND ELECTRICAL CONNECTOR P21. PERFORMED RESISTANCE CHECK OF SENSOR NO DEFECTS FOUND. PERFORMED BITE TEST REF FIM 49 60 00 810 812 NO FAULTS AND APU OPS CSDR USAA2012010500023Cable · burnedC2 CHECK - APU BATTERY DC CABLE BURNT AT ATTACH POINT. REPLACED APU GROUND BRACKET ASSEMBLY IAW B767 SRM 51-90-02-06 PAR 4 PG8.SDR VNAA2011122900014Connector · dirtyCREW REPORTED APU OIL PRESSURE CAUTION MESSAGE IN FLIGHT EN ROUTE FROM TYS TO PHL. CREW FOLLOWED QRH, DIVERTED TO TRI AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED APU, CLEANED APU OIL PRESSURE SWITCH CONNECTOR AND PERFORMED CHECKS USING AIRCRAFT MAINTESDR ASAA11510751Wire Harness · damagedAPU SURGING WITH A PACK SELECTED. GROUNDED YES. BITE CK SHOWS MAINT MSG 49 52270 DELTA PSI SENSOR SHOWS OUT OF RANGE DRIFT. CLEANED/ INSP THE TUBES FOR THE DELTA PRESSURE AND TOTAL PRESSURE SENSORS. NO DEFECTS OR DEBRIS NOTED. VERIFIED DELTA PRESSURRE SENSOR WSDR CA110926003Connector · burned(CAN) APU GENERATOR PUT ON MEL DUE TO FAILURE TO REMAIN ON LINE. ON GROUND TROUBLESHOOTING, INITIALLY COULD NOT DUPLICATE SNAG. FURTHER TROUBLESHOOTING AND REVEALED PIN & SOCKET DAMAGE TO APU GEN - FIREWALL DISCONNECT (D40228J). AS OF THE DATE OF THIS REPORTSDR SIMA201125202Wire Harness · shortedON FLIGHT 2838 THE CREW REPORTED AN ELECTRICAL BURNING ODOR IN COCKPIT AND CABIN. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPLACED APU HARNESS DUE TO LIGHTNING STRIKE IAW EMB 145 AMM 24-34-00 REF NRWC 616-DFW-00583 FOUNDSDR ASAA11510260Pin · defectiveAPU HAD BEEN RUNNING FOR ABOUT 3 MINUTES APU SHUTDOWN FAULT LIGHT ON. REMOVED APU ECU AND SAW CONTINUITY FLUCTUATING TO 'OPEN' BETWEEN D3599A PINS C2 AND D2 WHILE SHAKING P15 REF WDM49 94 21. FOUND VERY LOW PIN TENSION AT P15 PIN B. REPLACED P15 PIN B REF CSDR UALA2011081204260Pin · bentAPU SHUTS DOWN WHEN APU PNEUMATICS IS ATTEMPTED. HAS HISTORY, DEFERRED APU BLEED. FOUND BENT PIN ON OIL PRESSURE SWITCH, PIN STRAIGHTENED, STARTED ENGINE TWICE WITH NO PROBLEMS NOTED.SDR UALA2011070603346Connector · contaminatedSTATUS MSG APU OIL QTY APU OIL QTY INOP. CHECKED AT ORD APU OIL QTY FULL. ** DL8369 CREATED TO MONITOR ** -INF- :AHM CMC MSG'S INDICATES 49 10280 OIL QTY LOW REF: FIM 49-20 & PERFORM TASK 819. RPR OR RPL AS NECESSARY & IF NEEDED OIL QTY SNSR PCN: 295-90SDR VNAA2011062300017Wire · damagedAT MOB, CREW REPORTED APU FAULT / AUTO SHUTDOWN AND SMELL OF FUMES (FUEL) IN CABIN. AIRCRAFT RETURNED TO GATE. MAINTENANCE INSPECTED AND TROUBLESHOT, FOUND A CONNECTOR PIN SHORTED TO GROUND, REPAIRED WIRING AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANSDR CA110518004Connector · corrodedDURING A PLANNED APU CHANGE, CONNECTOR PN D38999-26FD97 SN ON HARNESS W314 WAS FOUND CORRODED.
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