JASC 4970

Service difficulty reports · 272

Reports filed under 4970 · APU Indicating 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 = '4970'
  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 MYWA110001Valve · out of adjustETOPS SIGNIFICANT SYSTEM: APU EGT GAUGE INTERMITTENT. FOUND THE CIRCUIT RESISTANCE VALVE TOO HIGH. ADJUSTED VALVE. SYSTEM OPERATION NORMAL.Jan 4, 2011 · N753MA · Boeing 73748ESDR ASAA1058410Warning System · false activationFAULT LIGHT ILLUMINATED WHILE STARTING APU. FOUND FAULT CODE 49 94299 ON CDU UNABLE TO DUPLICATE DISCREPANCY. REMOVED FILTER AND INSPECTED. APPEARS TO BE OK. INSTALLED NEW FILTER AND FILTER BYPASS SWITCH AS PRECAUTIONARY. RAN APU FOR 10 MINUTES LOADED NO Oct 18, 2010 · N588AS · Boeing 737890SDR MYWA100114Warning System · activatedETOPS SIGNIFICANT SYSTEM: APU FAULT LIGHT ILLUMINATED.Oct 14, 2010 · N733MA · Boeing 73781QSDR ASAA1058118Warning System · malfunctionedAFTER APU START THE BLUE APU "MAINT" LIGHT WAS ILLUMINATED. ACCOMPLISHED TASK 49 11 00 APU OPERATIONAL TEST NO FAULTS FOUND, OPS CHECK NORMAL. NO MESSAGES ON CURRENT STATUS OF BITE TEST.Jul 31, 2010 · N566AS · Boeing 737890SDR ASAA1058042Sensor · out of toleranceAPU FAULT LIGHT ON START UNABLE TO START. FOUND FAULT CODE 49 61224 INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH. REMOVED AND REPLACED INLET TEMP SENSOR PER MM 49 61 31 400 801. OPS CHECK GOOD.Jul 6, 2010 · N587AS · Boeing 737890SDR MYWA100087Warning System · activatedETOPS SIGNIFICANT SYSTEM - APU INOP MSG.Jun 19, 2010 · N733MA · Boeing 73781QSDR MYWA100086Warning System · activatedETOPS SIGNIFICANT SYSTEM - APU INOP MSG.Jun 10, 2010 · N733MA · Boeing 73781QSDR DL764091451Warning System · activatedDURING RT ENG START WHEN AIR LOAD APPLIED APU FAULT LIGHT ILLUMINATED AND APU SHUTDOWN. ENGINE START ON STAND FAILED WITH RESULTING STATUS MSG. APU FUEL CONTROL. APU FWD TO MCO AS PER MEL 49-11-01B WITH DISPATCH APPROVAL. PLACARD INSTALLED. A/C OK FOR SERVSep 3, 2009 · N833MH · Boeing 767432ERSDR ASAA0956469Warning System · activatedFAULT LIGHT ILLUMINATED DURING APU START AFTER LANDING. ACCOMPLISHED APU STARTING AND OPERATION PER AMM TASK 49 11 00 860 801. ACCOMPLISHED APU BITE TEST. NO FAILURES FOUND PER FIM TASK 49 60 00 810 801. STARTED APU TWICE AND STARTED NORMAL AFTER POWER DOWAug 27, 2009 · N560AS · Boeing 737890SDR VNAA2009080700001Warning System · malfunctionedCREW REPORTED AN APU OIL PRESSURE CAS LIGHT ON AT CRUISE AFTER TAKEOFF FROM TYS. THE AIRCRAFT RETURNED TO TYS AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE APU ELECTRONIC CONTROL UNIT (ECU) PER THE AIRCRAFT FAULT ISOLATION MANUAL. NO FAULTS WERE FOAug 3, 2009 · N241PS · Cndair CL6002B19SDR ASAA0955565Thermocouple · inoperativeAPU CDU PAGE HAS MAINTENANCE MESSAGE 49 71146. FOLLOWED FIM 49 70 00 810 801 AND CONFIRMED THAT EGT1 THERMOCOUPLE IS INOP. REMOVED AND REPLACED EGT1 THERMOCOUPLE PER MM 49 71 21 400 801. OPS CHECK GOOD. GROUND VERIFICATION COMPLETED PER MM 49 71 21 400 801May 10, 2009 · N577AS · Boeing 737890SDR ASAA0954251Warning System · activatedFAULT LIGHT ILLUMINATED DURING START GROUNDED YES. CK APU BITE NO FLAME 49 41011 SHUT DOWN C/W FIM TASK 49 40 00 810 802 APU STARTED NORMAL. SEAMC TIM NOTIFIED. NO FAULTS NOTED AT START NO HISTORY WITHIN 30 DAYS.Jan 18, 2009 · N565AS · Boeing 737890SDR ASAA0954238Warning System · malfunctionedAPU "FAULT" ANNUNCIATOR ILLUMINATED ON APU START. GROUNDED YES. PERFORMED APU BITE CHECK FOUND FAULT MESS 49 15004 (INLET DOOR SHUTDOWN) PERFORMED FIM TASK 49 10 00 810 806 STEP A THRU STEP E OPERATED APU AT FULL LOAD THRU 5 CYCLES NO CURRENT FAULTS DISPLAYEDJan 14, 2009 · N517AS · Boeing 737890SDR ASAA0954236Warning System · malfunctionedAPU "FAULT" ANNUNCIATOR ILLUMINATED ON APU START. LIGHT EXTINGUISHED AFTER 5 MIN. ATTEMPTED APU START AGAIN. "FAULT" LIGHT WAS ILLUMINATED AGAIN. GROUNDED YES. PERFORMED APU BITE PROCEDURE FOUND MX MSG NR 49 15004 INLET DOOR SHUTDOWN. PERFORMED FIM TASK 4Jan 13, 2009 · N517AS · Boeing 737890SDR TRAX200800579Warning System · activatedAPU OVERTEMP WARNING MSG ON INFLIGHT 300 KTS AT FL 250, EMERGENCY DECLARED. FLT 4292 DEL 55 MINS.Apr 26, 2008 · N821AS · Cndair CL6002B19SDR AMTA200800034Warning System · false activationAPU FAULT LIGHT ILLUMINATED AND EICAS APU FUEL VA MESSAGE DISPLAYED. CYCLED APU FUEL VALVE SEVERAL TIMES, STARTED APU, VALVE OPS CHECK NORMAL IAW AMM 28-25-02, NO FAULT LIGHT. (K)Jan 25, 2008 · N518AT · Boeing 75723NSDR ASAA0852455Warning System · malfunctionedAPU "MAINT" LIGHT ILLUMINATED. PERFORMED FIM 49 60 TASK 801. OP CHECKS GOOD FAULT CLEARED. NO HISTORY. OIL QTY FULL.Jan 6, 2008 · N585AS · Boeing 737890SDR CA071103001Ecu · faulty(CAN) FLIGHT RETURNED DUE TO APU OIL PRESSURE MESSAGE CAUSING THE APU TO FAIL. AIRCRAFT WAS ALREADY OPERATING WITH 1 IDG GENERATOR UNSERVICEABLE. MAINTENANCE CHECKED THE SYSTEM AND FOUND AN ECU FAULT MESSAGE. THE APU ECU WAS REPLACED AND THE A/C WAS CHECKED SENov 1, 2007 · Cndair CL6002B19SDR QXEA200701541Relay · malfunctionedPDX - FLIGHT 2575, RECEIVED A APU SOV FAIL MESSAGE WHEN SHUTTING DOWN APU. RETURNED TO THE GATE. MAINTENANCE REPLACED THE K-103 RELAY. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.Oct 14, 2007 · N610QX · Cndair CL6002C10SDR AMTA200700475Warning Light · false activationAPU MASTER CAUTION LIGHT ILLUMINATED WHEN ELECT POWER TRS TO ENG DRIVEN GENERATORS REMAINS ILLUMINATED WHEN APU SHUTDOWN. INTERROGATED CDU PERFORMED BITE TEST ON APU NO RECENT FAULT OR ANY HISTORY FAULTS NOTED ON ANY LEGS, SHOT DOWD AC POWER CYCLE AC POWER APOct 1, 2007 · N317TZ · Boeing 73783NSDR QXEA200701485Apu · inoperativeSEA - ON FLIGHT 2475, RETURNED TO GATE, WITH APU OFF ELECTRIC PAGE ON MFD SHOWS INTERM LOAD OF UP TO 13. PLACED ON MEL. 10-18-07 MAINTENANCE REMOVED AND REPLACED APU DC STARTER/GENERATOR PER Q400 AMM TASK 24-33-01-000-801 AND 24-33-01-400-801. OPS CHECKSep 25, 2007 · N411QX · Bombdr DHC8402SDR COMA0760526Warning System · malfunctionedFLIGHT 5318 - APU OIL TEMP CAUTION RECEIVED EN ROUTE. DIVERTED TO BNA, LANDED WITHOUT INCIDENT. INSPECTED OIL LEVEL, CHECKED OIL TEMP SENSOR AND CLEANED ELECTRICAL CONNECTOR. RAN APU WITH BOTH PACKS ON, NO FURTHER DEFECTS.Aug 13, 2007 · N912CA · Cndair CL6002B19SDR AMTA200700198Warning System · malfunctionedAPU FAULT LT ILLUMINATED ON START. PERFORMED APU BITE CK, FOUND MSG 49-41011, PERFORMED BITE CK IAW FIM 49-40-00-810, FIM 49-60-00-810, NO CURRENT FAULT FOUND. (K)Apr 22, 2007 · N318TZ · Boeing 73783NSDR AMTA200700172Warning Light · illuminatedATTEMPTED START OF APU, FAULT LIGHT, NO LIGHT OFF. PERFORMED BITE IAW FIM 49-60-00-810-801-802, CURRENT FAULTS DISPLAYED. (K)Mar 25, 2007 · N318TZ · Boeing 73783NSDR AMTA200700150Warning System · malfunctionedAFTER BLOCK OUT APU GEN OFF LIGHT ILLUMINATED, RESENT TURNED OFF GEN LIGHT AND APU DOOR EICAS MSG APPEARED. RESET CB APU BATT BUS. PERFORMED APU BITE IAW FIM 49-11-00, FIG 103, NO FAULTS. RAN APU NO DEFECTS FOUND. APU DOOR CLOSES ON SHUTDOWN. (K)Mar 22, 2007 · N552TZ · Boeing 75733NSDR AMTA200700134Apu · malfunctionedAPU INOPERATIVE. PERFORMED BITE ON ECU, FOUND 2 ABORTED STARTS AND 1 DOOR SYSTEM FAULT. RAN APU SEVERAL TIMES APU RAN FINE NO FAULTS. (K)Mar 4, 2007 · N550TZ · Boeing 75733NSDR AMTA200700113Warning System · malfunctionedAPU FAULT LIGHT CAME ON WHEN APU SHUTDOWN NORMALLY 1 HOUR BEFORE LANDING. FAULT LIGHT WENT OUT AFTER 5 MINUTES. PERFORMED APU RUN-OPS CHECK NORMAL, NO FAULTS. EXISTING FAULT 49-31001 CLEARED ITSELF UPON BITE TEST AFTER OPS CHECK. (K)Feb 26, 2007 · N304TZ · Boeing 73783NSDR 2007UALA00596Warning System · activatedSTATUS MSG -APU-, BUT APU NEVER SHUT DOWN. REBOOTED ACFT, BUT NO HELP. AFTER TROUBLESHOOTING, DETERMINED THAT APU FIRE-OVERHEAT DETECTOR CARD WAS FAULTY. REPLACED CARD & APU OPERATED OK FOR SERVICE. SUSPECT DISTURBED CIRCUIT PATH ON CARD.Feb 24, 2007 · N795UA · Boeing 777222SDR AMTA200600743Unknown · unknownAPU GEN OFF BUSS LIGHT NOT ON, APU SPEED AT 95 PERCENT. RESET AC POWER, APU GEN OFF BUSS LIGHT OPERATES NORMALLY. OK FOR SVC. (K)Dec 23, 2006 · N323TZ · Boeing 73783NSDR AMTA200600636Sensor · faultyAPU AUTO SHUTDOWN WITH FAULT LIGHT ILLUMINATED IAW FIM 49-11-00 FIGURE 108, INSTALLED REPLACEMENT. LOAD COMPRESSOR INLET TEMP SENSOR IAW AMM 49-61-03, OPERATIONAL CHECK NORMAL. (K)Nov 3, 2006 · N550TZ · Boeing 75733NSDR HALA0600646Warning Message · false indicationETOPS SIGNIFICANT SYSTEM, APU BITE BITE EICAS MTC MSG FOUND ON OVERNIGHT CHECK. PERFORMED APU ECU BITE PER FIM 49-11-00/101 FIG 103, NO FAULTS ERASED. MSG ON EICAS ECS MSG PAGE DID NOT RETURN.Aug 30, 2006 · N583HA · Boeing 767300SDR QXEA200602254Warning System · false activationPDX- FLIGHT 2533, AFTER APU SHUTDOWN RECEIVED A APU SOV OPEN MESSAGE. RETURNED TO THE GATE. MAINTENANCE CYCLED THE APU, NO DEFECTS NOTED. NO FAULTS FOUND IN THE MAINTENANCE DATA COMPUTER. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.Aug 28, 2006 · N610QX · Cndair CL6002C10SDR COMA0660400Connector · dirtyFLIGHT 5506 - RECEIVED APU TEMP MASTER CAUTION IN FLIGHT/ DIVERTED TO ORF AND LANDED WITHOUT INCIDENT. FOUND APU OIL SERVICED PROPERLY. CLEANED CONNECTOR ON OIL TEMP BULB AND RESECURED. PERFORMED APU RUN, NO FURTHER DEFECTS.Jun 22, 2006 · N592SW · Cndair CL6002B19SDR TRAX200600247Fire Warning · false activationAPU AUTO SHUTDOWN (FALSE FIRE WARNING, NO EMERGENCY DECLARED)May 21, 2006 · N833AS · Cndair CL6002B19SDR MASA200500699Bulb · malfunctionedDECLARED AN EMERGENCY IN BOUND TO PHX FOR AN APU HIGH OIL TEMPERATURE CAUTION MESSAGE. MX REMOVED AND REPLACED OIL TEMPERATURE BULB.Sep 5, 2005 · N7291Z · Cndair CL6002B19SDR AU510001973Thermocouple · brokenAPU AIR SUPPLY ERRATIC WITH PULSES CAUSING FAILURE OF THREE AIRSTARTERS. INVESTIGATION FOUND APU THERMOCOUPLE BREAKING DOWN.Aug 10, 2005 · Fokker F28MK0100SDR COMA0560247Warning Light · illuminatedFLIGHT 5106 DURING CRUISE FLIGHT RECEIVED AN APU OIL TEMPERATURE CAUTION MESSAGE, EXECUTED QRH PROCEDURE AND DIVERTED TO CMH. INTERROGATED APU ECU, INSPECTED OIL LEVEL AND CHECKED FOR LEAKS, OPERATED APU WITH NO FAULTS.Apr 5, 2005 · N979CA · Cndair CL6002B19SDR QXEA200400920Warning System · malfunctionedDEN - ON FLIGHT NUMBER 4321, UPON APU STARTUP RECEIVED APU OVERTEMP WARNING. COMPLETED CHECKLIST. MAINTENANCE PERFORMED APU STARTUP ON RAMP, APU STARTED NORMALLY. NO PARTS REPLACED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.Dec 23, 2004 · N606QX · Cndair CL6002C10SDR DHL2004367007Warning Light · illuminatedAPU FAULT LIGHT ILLUMINATED IN FLT. PERFORMED ABNORMAL, APU WAS IN NORMAL POSITION. REPLACED ECB AS PRECAUTION, T/S PER FIM 49-00 WITH NO FAULT CODES FOUND. OPS CHECK APU PER 49-00-00 OK.Jul 16, 2004 · N367DH · Airbus A300B4203SDR AMTA200301196Transmitter · malfunctionedAPU OIL QUANTITY FLUCTUATES BETWEEN FULL AND 0.5. REMOVED AND REPLACED APU OIL QUANTITY TRANSMITTER IAW MM 49-94-04-2, OPS CHECK NORMAL, NO LEAKS NOTED. (M)Sep 18, 2003 · N560TZ · Boeing 75733NSDR COMA0360365Pressure Switch · malfunctionedFLIGHT 5711 APU OIL PRESSURE CAUTION MESSAGE. REPLACED THE LOW OIL PRESSURE SWITCH.Aug 9, 2003 · N446CA · Cndair CL6002B19SDR QXEA200300960Warning System · malfunctionedSEA- ON FLIGHT 2454 'APU PUMP FAIL' AND 'APU ECU FAIL' CAUTION MESSAGES AFTER APU WAS SHUT DOWN AS PART OF AFTER START CHECKLIST. OPERATED APU IAW CRJ AMM 49-10-00. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.Aug 8, 2003 · N607QX · Cndair CL6002C10SDR QXEA0300510Valve · failedPDX- ON FLIGHT 2438 OUT OF 10,000 FEET ON ARRIVAL TO PDX, RECIEVED A "APU FAULT" CAUTION MESSAGE. APU OPERATED NORMALLY. BEGAN TO RUN ABNORMAL CHECKLIST AND MESSAGE WENT OUT AFTER TWO MINUTES. REMOVED AND REPLACED DEPRIME SELINOID VALVE. OPERATIONAL CHECKS GOOApr 26, 2003 · N615QX · Cndair CL6002C10SDR AUS20030415Connector · loose(AUS) APU INOPERATIVE, LIGHT FAULTY. INVESTIGATION FOUND BACKSHELL ON CONNECTOR D4934J LOOSE.Apr 11, 2003 · Boeing 737376SDR XNOA01073Connector · looseNR 1 ENGINE AND APU FAULT LITES CAME ON PRIOR TO T/O. (MANIFOLD FAULT LITES) RESET CONNECTOR ON 12 & 13 HF CONTROL BOX. "A" LOOP SYS OPS CHECK GOOD ON GROUND IAW A300MM 26-16-00.Sep 26, 2002 · N307FV · Airbus A300B4203SDR 2001F00450Sensor · failedON PUSH BACK, STARTING RIGHT ENGINE, APU FAULT CAUSING POWER LOSS. ECU BITE CHECK WAS ACCOMPLISHED WITH NO FAULTS FOUND. AIRCRAFT RELEASED. ABOUT 30 MINUTES AFTER DEPARTURE APU FAULTED, SINGLE ELECTRICAL SOURCE, AIRCRAFT RETURNED TO DEPARTURE STATION. ON INSep 10, 2001 · N541NA · Boeing 75723ASDR MASA01067Warning System · malfunctionedFLT 9511 - ATL-PHL - HIGH APU OIL TEMP IN FLIGHT. THE AIRCRAFT HAS THE NR 1 GENERATOR DEFERRED. THE APU WAS A REQUIRED ITEM FOR THE NR 1 GENERATOR BEING MEL'D. THE CREW DECLARED AN EMERGENCY AND LANDED IN CLT. MAINTENANCE PERFORMED AND OPS CHECK AND COULD Jul 14, 2001 · N77195 · Cndair CL6002B19SDR JBXA000299Sensor · failedIN FLIGHT APU OIL TEMP CAUTION MESSAGE ON EICAS. DUE TO NR 2 GENERATOR MEL HAD TO RETURN TO RDU. REMOVED AND REPLACED APU OIL TEMP SENSOR IAW CRJ AMM 49-91-25. PERFORMED OPS AND LEAK CHECKS IAW CRJ AMM 49-10-00. ALL OPS AND LEAK CHECKS GOOD.Jul 2, 2001 · N576ML · Cndair CL6002B19SDR DLM88011028Chip Detector · leakingSHORTLY AFTER TAKEOFF, F/A REPORTED HAZE IN CABIN WITH ALL 3 SMOKE ALARMS GOING OFF. SMELLED LIKE BURNING SMELL. CAME OUT OF OVERHEAD DUCTING. RETURNED TO PHX. FOUND APU MAG CHIP DETECTOR LEAKING AND OIL INGESTED IN APU INTAKE. REPLACED CHIP DETECTOR ANDJun 21, 2001 · N905DE · Doug MD88SDR JBXA000277Sensor · failedAPU OIL TEMP CAUTION LIGHT ILLUMINATED IN FLIGHT. AIRCRAFT THEN AIR RETURNED TO RDU BECAUSE THE NR 2 ENGINE IDG HAD EARILER BEEN PLACED ON THE DEFERRED MAINTENANCE ITEM LIST PER THE CL-65 MEL. AFTER ARRIVAL AT RDU THE APU OIL TEMP SENSOR WAS REMOVED AND REPLMay 2, 2001 · N584ML · Cndair CL6002B19
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