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.

SDR ASAA2019062439801Terminal · brokenAPU CT5ATP EGT HAS SHIFTED ABOVE THE 593 DEGREE THRESHOLD AND REMAINS BELOW THE 605 THRESHOLD. ERRONEOUS INLET TEMP OR PRESSURES ARE SUSPECT. GROUNDED - YES. REMOVED AND REPLACED APU INLET TEMP SENSOR REF B7237-900 AMM 49-61-31. DURING INSTALL OF CANNON PLUG PJun 23, 2019 · N440AS · Boeing 737990ERSDR ASAA2019052729487Wire Harness · intermittentAPU HAS HISTORY OF FAULT CODE 49-31171 WITH NO STARTS ON LANDING. GROUNDED - YES. ACCOMPLISHED FIM 49-31 TASK 808 STEP F.(4) CONTINUITY FROM CONNECTOR D3599B PIN A9 TO P23 PIN 1 IS GOOD REF WDM 49-62-12 P23 PIN 2 TO GROUND IS GOOD. P23 PIN 3 GROUND IS INTERMITMay 27, 2019 · N513AS · Boeing 737890SDR ASAA2019043029216Connector · looseWHEN CHECKING CDU FOR APU OIL LEVEL, FOUND FAULT 49-94304 OIL LEVEL SENSOR SHOWS CIRCUIT FAILURE. GROUNDED - YES. ACCOMPLISHED FIM 49-90 TASK 811, FOUND OIL SENSOR CONNECTOR NOT SECURED COMPLETELY, SECURED CONNECTOR AND ACCOMPLISHED BITE PROCEDURE, NO FAULTS FApr 30, 2019 · N566AS · Boeing 737890SDR UIEA2019041973898Monopole · looseAPU INOP. PERFORMED APU CONTROL UNIT BITE TEST IAW AMM 49-61-05. FOUND SPEED SENSOR #1 & 2 FAULTED ON ECU PREVIOUS 3RD & 4TH STARTS. PER MCC PERFORMED OPS CHECK OF APU . OPS NORMAL. NO DEFECTS NOTED. COMPLIED WITH WDM 49-16-11, & CONTINUITY GOOD BOTH MONOPOApr 16, 2019 · N1409A · Boeing 767306SDR HALA2019032200141Connector · dirtyETOPS SIGNIFICANT SYSTEM - UPON ARRIVAL APU AUTO SHUTDOWN, APU INOP. PERFORMED TSM 49-00-81 CLEANED CONNECTOR P19. RE-SECURED CONNECTOR P19 TO FCU PERFORMED GROUND SCAN-NO FAULTS. PERFORMED APU BITE TEST PER MEL 49-00-00 TEST PASS. APU STARTED ON FIRST ATTEMPMar 21, 2019 · N212HA · Airbus A321271NSDR UIEA2019022703407Wire Harness · defectiveNO DUCT PRESSURE DURING APU OPERATION.(<P>ITEM TRANSFERRED TO MDDR# 107913 PER DDG 49-11-01-01 (APU PNEUMATIC INOP).</P><P>NOTE PERFORMED INITIAL TS BITE ECU SHOWING P2 SENSOR FAULY. TS SHOWING WIRE TO P2 SENSOR PIN 1 OPEN. NEED FURTHER TS AND REPAIR BROKEN WIFeb 26, 2019 · N1321A · Boeing 767306SDR ASAA2019022658356Connector · looseAPU OVERSPEED MASTER CAUTION AT FL 340. RAN CHECKLIST OVERSPEED LIGHT WENT OUT SEVERAL MINS LATER. GROUNDED - YES. FOUND LOOSE PLUG ON P12 SPEED SENSOR. EXAMINE CANNON PLUG NO DEFECTS NOTED RESECURED SPEED SENSOR CANNON PLUG REF B737-800 FIM 49-30 TASK 802. PEFeb 25, 2019 · N581AS · Boeing 737890SDR ASAA2019022528324Wire Harness · failedAPU HAS HISTORY OF NO BLEED. GROUNDED - YES. REMOVED APU ENGINE WIRE HARNESS AND INSTALLED A SERVICEABLE UNIT. REF B737-900 AMM 49-11-01-00-802. PULLED / RESET TWO C/B'S AS REQUIRED. USED APU BLEED SOURCE TO START ENGINES WITH NO DEFECTS. PERFORMED APU BITE ANFeb 25, 2019 · N442AS · Boeing 737990ERSDR UIEA2019022203306Wire · out of positionAPU BLEED VALVE WILL NOT OPEN(<P>PERFORMED T/S FOUND SWAPPED WIRE AT CONNECTOR D4100J PIN 9,10,11. CORRECTED AND PERFORMED SATISFACTORY OPS TEST OF APU BLEED VALVE IAW B767 WDM 49-14-11 AND AMM 49-00-00</P>)Feb 20, 2019 · N1327A · Boeing 76737DSDR UIEA201812282948Connector · unsecureAPU INOP. FOUND LOOSE CONNECTOR AT FLOW SENSING MODULE, SECURED PLUG, OPS CHECK OK. IAW AMM 49-11-00.Dec 26, 2018 · N1511A · Boeing 767383SDR ASAA2018121207485Wire Harness · unknownFLT ATTENDANT REPORTS LOUD BANGING IN AFT GALLEY DOOR DURING S.E. TAXI WITH APU RUNNING. GROUNDED - YES. VERIFIED LOUD BANGING SOUND COMING FROM APU WHEN HIGHER BLEED AIR IS REQUIRED (HIGHER THAN 20 PSI). NO DEFECTS IN TAIL PIPE. REPLACED APU ENGINE WIRE HARNEDec 10, 2018 · N464AS · Boeing 737990ERSDR P5CA2018091800287Connector · dirtySTATUS MESSAGE, APU OIL QTY. CLEANED & SECURED OIL TXMTR PLUG AND APU OPERATIONAL CHKS OK IAW AMM 49-74-00.Sep 15, 2018 · N643GT · Boeing 7673JHFSDR UIEA2018062101212Connector · dirtyAPU WILL NOT START. REMOVED APU ECU, FOUND CONNECTOR DIRTY, CLEANED PER AMM 20-60-02. PERFORMED APU BITE PROCEDURE PER AMM 49-11 FAULT TREE 958, NO FAULTS FOUND. PERFORMED OPS CHECK PER AMM 49-11-00-802-002.Jun 21, 2018 · N1373A · Boeing 76731KSDR DALA2018061203968Cable · burnedDURING INSPECTION OF BATTERY CABLE CONNECTORS, BURNED BATTERY CABLE TERMINAL AND BURNED CONNECTOR WERE FOUND IAW AMDS 4944-4001, STEP 2. THE CONNECTOR ASSEMBLY WAS REPLACED SWPM 20-20-01. CABLE WAS FABRICATED IAW ERA 569217-14, REV ORIGINAL. THE CABLE WASJun 7, 2018 · N913DN · Doug MD9030SDR 2018FA0000153Wire Harness · damagedWIRING DEFECTS WERE DISCOVERED ON AN OVERHAULED APU. DURING TROUBLESHOOTING OF THE WIRING DEFECTS ON THE APU THE WIRING HARNESS WAS FOUND IN POOR CONDITION. INCORRECT AND DANGEROUS SPLICES HAD BEEN FITTED WITH LOOSE & UNPROTECTED WIRES PROTRUDING FROM VARIOUApr 24, 2018 · N496CS · Boeing 737400SDR ASAA2018040724171Connector · saturatedON TAXI IN, WHEN APU MASTER SELECTED ON, ECAM DISPLAYED "APU EMERG SHUTDOWN" GROUNDED - YES. FOLLOWED TSM 49-00-81-810-803-A, FOUND WATER INGRESS IN PNL 108VU, CLEANED AND DRY ELECT CONNECTIONS. REINSTALLED ONL 108VU AND PERFORMED APU OPS CHECK REF AMM 49-00-0Apr 7, 2018 · N285VA · Airbus A320214SDR ASAA2018031023869Wire Harness · burnedON THE APU, FOUND WIRES AT NR 1 EGT THERMOCOUPLE WERE BURNED. ACFT GROUNDED. REMOVED AND REPLACED APU HARNESS IAW AMM 49-11-01-400-802. PERFORMED APU OPERATIONAL TEST IAW AMM 49-11-00-710-801. OPS CHECKED GOOD. PERFORMED APU BITE PROCEEDURE IAW AMM 49-61-00-Mar 10, 2018 · N479AS · Boeing 737990ERSDR ASAA2018021523687Wire Harness · faultedFOUND APU FAULT, MAINT MESSAGE 49-52219, NO FLIGHT DECK LIGHT. INLET PRESSURE SENSOR DISAGREES WITH BUS DATA. FOR 17 STARTED LOGGED. ACFT GROUNDED. APU ELECTRICAL HARNESS CHANGED AS A PRECAUTION IAW AMM 49-11-01/401. HAVE PREVIOUS HISTORY OF APU HARNESS Feb 15, 2018 · N581AS · Boeing 737890SDR ASAA2018011723182Wire Harness · faultedNO APU BLEED AIR DUCT PRESSURE. ACFT GROUNDED. ACCOMPLISHED AN APU BITE, FAULTS LAST 90 DAYS, 49-41012, AND 49-31016. REMOVED & REPLACED THE APU WIRE HARNESS. OPS GOOD. GROUND VERIFICATION SUCCESSFUL. IAW AMM 49-61-00-700-801, AND 49-61-01/401.Jan 17, 2018 · N530AS · Boeing 737890SDR VNAA2018010411101Wire · burnedAFTER DEFERRING THE APU DOOR OPEN, DURING THE APU START, BLUE SMOKE WAS REPORTED IN THE COCKPIT ALONG WITH AN APU FIRE 'W' MESSAGE. ON INSPECTION, BURNED & MELTED WIRING WAS FOUND AROUND THE APU, BUT WAS CONTAINED TO JUST THE APU AREA. MX R & R THE APU AND AJan 4, 2018 · N573NN · Cndair CL6002D24SDR UIEA2017110702188Lead · burnedAPU LEAD BURNED AND APU IGNITER PLUG WORN. REMOVED AND REPLACED APU IGNITER PLUG AND LEAD IAW AMM 49-41-04.Nov 3, 2017 · N1321A · Boeing 767306SDR ASAA2017102222274Connector · dirtyAPU MAINT LIGHT ILLUMINATED. ACFT GROUNDED. FOUND APU OIL PAGE ON MCDU READS ADD, APU READS FULL ON SIGHT GAUGE, CLEANED AND RESEATED OIL LEVEL SENSOR CONNECTOR, APU NOW READS FULL ON MCDU APU OIL QUAUTITY PAGE IAW WDM 49-94-21 AND FIM 49-90, 804. OPS NOROct 22, 2017 · N474AS · Boeing 737990ERSDR UIEA2017083101588Connector · damagedAPU DIED WHILE RUNNING. FOUND PUSHED PIN ON CONNECTOR D492 FOR APU ALTN CTRL CB. REPAIRED AND OP GOOD IAW AMM 49-41-01 AND 49-31-04.Aug 29, 2017 · N1361A · Boeing 76731BSDR A6WA2017082545226Connector · damagedAPU AUTO SHUTDOWN AT GATE. EXHAUST ODOR IN FLIGHT DECK. SMOKE SEEN FROM APU EXHAUST. REMOVED AND REPLACED APU FUEL SOLENOID VALVE IAW AMM 49-31-05 AND SUP 10-023A. REMOVED AND REPLACED APU FUEL SOLENOID CONNECTOR PLUG IAW ESPM 20-17-35, OPS AND LEAK CHECKED GAug 24, 2017 · N417AW · Cndair CL6002B19SDR ASAA2017081821668Connector · dirtyAPU OIL QTY READS UNKNOWN ON CDU. ACFT GROUNDED. PERFORMED APU BITE IAW FIM 49-60 TASK 801. FOUND MAINT MESSAEG 49-94304 OIL LEVEL SENSOR SHOWS CIRCUIT FAILURE. DISCONNECTED P16 FROM OIL LEVEL SENSOR AND CLEANED CONNECTION IAW FIM 79-90 TASK 811. RECONNECTEDAug 18, 2017 · N586AS · Boeing 737890SDR UIEA2017082101513Connector · misroutedAPU ECU FAULTY, EGT HARNESS CIRCUIT NR 2 FAULT LATCHED ON. FOUND HARNESS CONNECTORS FOR EGT CIRCUITS 1 AND 2 CROSSED. CORRECTED THE CONNECTORS IAW SWPM 20-10-11. OPS CHECKED NORMAL.Aug 17, 2017 · N1217A · Boeing 767375SDR UIEA2017081701500Circuit Breaker · trippedAPU WOULD NOT START AFTER FLIGHT , APU DOOR STATUS MESSAGE. FOUND APU DOOR CIRCUIT BREAKER TRIPPED, RESET, STARTED APU SEVERAL TIMES AND CHECKED GOOD IAW AMM 49-41-00</P>)Aug 17, 2017 · N641GT · Boeing 76738ESDR UIEA2017071901241Bonding Jumper · wornTWO BONDING WIRES AT THE APU AIR INLET FLAP ACTUATOR FOUND WORN. THE BONDING JUMPERS WERE REMOVED AND REPLACED IAW AMM 49-15-06, REV 121.Jul 31, 2017 · N1361A · Boeing 76731BSDR UIEA2017071901242Bonding Jumper · frayedAPU AIR INTAKE ACTUATOR FOUND WITH TWO BONDINGS FRAYED. THE BONDING JUMPERS WERE REMOVED AND REPLACED IAW AMM 49-15-06, REV 121.Jul 31, 2017 · N1361A · Boeing 76731BSDR UIEA2017062601063Circuit Breaker · trippedAPU INOPERATIVE, FOUND APU DOOR CIRCUIT BREAKER OPEN, RESET THE CIRCUIT BREAKER IAW AMM 20-60-01. PERFORMED APU BITE TEST IAW AMM 49-61-05, NO FAULTS FOUND. OPS CHECKED GOOD IAW AMM 49-11-01.Jun 24, 2017 · N649GT · Boeing 767375SDR ASAA2017051820828Connector · contaminatedDURING TAXI IN, ATTEMPTED APU START. RECEIVED AN AUTO SHUT DOWN AND A FAULT LIGHT. TURNED APU SWITCH TO OFF. AFTER ABOUT 5 MINUTES. FAULT LIGHT EXTINGUISHED. ACFT GROUNDED. ACCOMPLISHED FIM 49-40, TASK 803. APU HAS FAULT MESSAGE 49-41254. STARTER CONVERTER UMay 18, 2017 · N409AS · Boeing 737990ERSDR AALA201705199005Terminal · burnedAPU STARTER FEEDER TERMINAL BURNED. REPLACED THE TERMINAL ON WIRE AT 8KA IAW AWM 49-42-01 AND ESPM 20-48-11-0101. AIRCRAFT WAS GROUNDED.May 17, 2017 · N147AA · Airbus A321231SDR WCEA20170322001Feeder Cable · burnedAPU FEEDER CABLE SPLICE WHERE THE OVERHEATING IS FOUND IS LOCATED BETWEEN FRAMES 66 & 67 UNDER CARGO FLOOR PANEL 271BF.Mar 21, 2017 · N600LP · Emb EMB135BJSDR GLBA2017031000640Shunt · burnedUNKNOWN SOURCE OF AN ELECTRICAL ODOR AROUND THE APU PANEL. NO TRIPPED CIRCUIT BREAKERSS OR OTHER ISSUES NOTED. MAINTENANCE FOUND THE APU SHUNT BURNED IN THE APU RELAY BOX. R & R THE APU SHUNT. INSTALLED A NEW SHUNT IN REVERSE. OPS CHECKED APU IAW MM 49-00-0Mar 9, 2017 · N293UX · Emb EMB120ERSDR HALA2017012100012Connector · dirtyAPU FAILED TO START ON TWO ATTEMPTS. PERFORMED FIM TASK 49-11 FAULT TREE 958. FAULT SHOWED "STARTER CIRCUIT" INSPECTED STARTER CIRCUIT PERFORM 49-11 FAULT TREE 962. CLEANED STARTER CIRCUIT CONNECTOR. OPS CHECK GOOD.Jan 21, 2017 · N594HA · Boeing 767332SDR ASAA2017011919486Wire Harness · faultyAPU OPERATIONAL TEST FOLLOWING APU REPLACEMENT SHOWS CURRENT STATUS FAULT 49-41298, STARTER CONVERTER SHOWS GENERATOR PMG FAILURE. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR WIRE HARNESS REF AMM 49-11-01. OPS TEST GOOD. NO CURRENT FAULTS.Jan 19, 2017 · N597AS · Boeing 737890SDR P5CA2016120200302Connector · dirtyAPU OIL QTY MESSAGE . APU OIL QTY TRANSMITTER P8 CONNECTOR CLEANED AND TORQUED IAW AMM 49-94-04 OPS CHECK NORMAL.Dec 1, 2016 · N644GT · Boeing 7673JHFSDR ASAA2016071017336Wire Harness · failedDURING APU BITE 49-60 TASK 801 CURRENT STATUS MESSAGE SHOWS. 49-71147 EGT 1 THERMOCOUPLE SHOWS OPEN CIRCUIT. ACFT GROUNDED. REMOVED AND REPLACED APU WIRING HARNESS IAW AMM 49-11-01-400-802, AND NR 1 EGT THERMOCOUPLE IAW AMM 49-71-21. APU OPERATIONAL TEST ANJul 10, 2016 · N431AS · Boeing 737990ERSDR ASAA2016070517280Wire Harness · defectiveTHE FLIGHT CREW VERBALLY ADVISED MAINTENANCE THAT THEY HAD APU FAULT LIGHT. ACFT GROUNDED. FAULT 49-94229 FOUND IN HISTORY IAW FIM 49-90, TASK 807 THIS WAS AN INTERMITTENT FAULT. APU OPS TEST IAW AMM 49-11-00-710-801, GOOD. ACFT RELEASED IAW MEL 49-99A. ENJul 5, 2016 · N568AS · Boeing 737890SDR ASAA2016070417262Connector · failedDURING 1ST CSS START ATTEMPT, A FAULT LIGHT ILLUMINATED AT FL370. QRH ACCOMPLISHED, TURNED APU OFF, FAULT LIGHT EXTINGUISHED. SUCCESSFUL SECOND START ATTEMPT. ACFT GROUNDED. APU BITE MAINTENANCE HISTORY SHOWS MAINT MSG 49-94226, LOW OIL PRESSURE SWITCH SHJul 4, 2016 · N519AS · Boeing 737890SDR AALA20160307005Connector · not reportedON TAKEOFF THE NR 2 GEN OFF LIGHT ILLUMINATED WITH ASSOCIATED EICAS MSG. UNABLE TO START THE APU. EMER DECLARED & FLIGHT RETURNED WITHOUT FURTHER INCIDENT. THE ACFT WAS GNDED. SEE ALSO AALA 20160306002. R & R APU INLET DOOR ACTUATOR CONNECTOR D502 IAW STAMar 5, 2016 · N362AA · Boeing 767323SDR ASAA2016013115215Connector · unsecureAPU FAILED TO START 3 ATTEMPTS, NO ROTATION. ACFT GROUNDED. PERFROMED APU BITE IAW AMM 49-61-00-200-801. INSPECTED APU FOUND AIR INLET DOOR NOT OPENING. INSPECTED DOOR SENSOR CONNECTOR PLUG, NO DEFECTS NOTED. RESEATED CONNECTOR PLUG. PERFORMED OPS CHECK OFJan 31, 2016 · N592AS · Boeing 737890SDR AALA20160131001Wire Harness · burnedCREW REPORTED ODOR & BURNING SMELL WHILE WAITING TO BOARD ACFT. CREW STATED APU WAS TURNED OFF AFTER ELEC GND POWER ESTABLISHED. PACKS OFF PCA ATTACHED. NOTED SMOKE FROM APU COMPARTMENT. FOUND BURNT APU STARTER LEAD WIRE. REPLACED APU HARNESS IAW 49-40-03Jan 31, 2016 · N9404V · Doug DC983SDR A6WA201542965Connector · dirtyIN FLIGHT RECEIVED APU OIL TEMP CAUTION. RAN QRH, DIVERTED BACK. MSG DID NOT CLEAR. ON GND MANUALLY SHUTDOWN APU. CLEANED APU OIL TEMP CONNECTOR P13 & COMPLIED WITH OPERATIONS CHECK OF APU IAW AMM 49-91-25 & 49-10-01. APU OPERATIONS CHECKED GOOD. GEN 2 WAAug 1, 2015 · N402AW · Cndair CL6002B19SDR NACA032720150001Wire Harness · fireAPU FIRE ON APPROACH, SHUTDOWN AND BOTTLE DISCHARGED. INSPECTED APU COMPARTMENT, FIRE LOCALIZED TO EGT HARNESS, AFT SHROUD FIRE SEAL & TAILPIPE FIRELOOP. INSPECTION FOUND CONDITION SERVICEABLE. REPLACED APU COMBUSTION LINER/FUEL ATOMIZER ASSY, IGNITER LEAD Mar 27, 2015 · N320DL · Boeing 737232SDR ASAA2015020810573Wire Harness · malfunctionedAPU CT5ATP EGT DATA SHOWS EGT IS TRENDING TOWARDS ESTABLISHED THRESHOLD. ENGINEERING RECOMMENDS REPLACE APU WIRE HARNESS. ACFT GROUNDED. R & R APU WIRING HARNESS REF MM 49-11-01-400-802. ACCOMPLISHED APU OPS TEST REF MM 49-11-00-710-801. OPS CHECK NORMAL. Feb 8, 2015 · N579AS · Boeing 737890SDR HALA2014120800207Connector · looseAPU FAULT- TWO ATTEMPTED STARTS UNSUCCESSFUL. ACCOMPLISHED APU BITE IAW FIM 49-11, FAULT TREE 987. INSPECTED APU. FOUND LUBE FILTER DELTA P POPPED. FOUND GENERATOR CONNECTOR LOOSE AND LEAKING. REPLACED LUBE AND SCAVENGE FILTERS IAW AMM 49-27-03. REPLACED Dec 8, 2014 · N581HA · Boeing 76733ASDR CALA2014112092721Connector · dirtyCREW REPORT APU SHUTDOWN WITH FAULT ON PUSH BACK. REPEAT EVENT DUE TO ERRATIC OIL TEMP. REPLACED OIL TEMP SENSOR, NO HELP. APUC REPLACED, NO HELP. WIRING CHECKED GOOD. TROUBLE SHOT DOWN TO VLV TEMP CONTROLLER. CLEANED & RESEATED FIRE WALL CONNECTOR D4900Nov 16, 2014 · N783UA · Boeing 777222SDR UIEA2014110600570Cable · looseAPU STARTER CABLES LOOSE. SECURED STARTER CABLES.Nov 6, 2014 · N767MW · Boeing 767277SDR VNAA2014100200001Connector · dirtyCREW REPORTED APU OIL TEMP CAUTION MESSAGE IN FLIGHT. CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED APU OIL LEVEL. NO SERVICING REQUIRED. MAINTENANCE REMOVED, INSPECTED, CLEANED AND REINSTALLED APU OIL TEMPERATURE BULB ELECTRICAL CONNECTOROct 2, 2014 · N213PS · Cndair CL6002B19
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