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.

SDR I5PA2023122968801Ecu · faultyFLT: N/A (MX FINDING). ESI - APU BLEED INOP. REPLACED APU ECU PER AMM. APU BLEED CONFIRMED OPERATIONAL.Dec 29, 2023 · N688SL · Boeing 757230SDR HALA20231226286Unknown · unknownETOPS - WHEN TRYING TO START APU GOT APU FAULT. AUTO SHUT DOWN ON ECAM. REMOVED AND REPLACED APU IGNITERS PER AMM 49-441-41. REPLACED APU EXCITER PER AMM 49-41-38. OPS TEST GOOD. OK FOR SVC.Dec 23, 2023 · N389HA · Airbus A330243SDR HALA202311274260Unknown · unknownAPU START-APU AUTO SHUTDOWN ON START. REMOVED AND REPLACED APU STARTER PER AMM 49-42-51. OPS CHECK GOOD, OK FOR SERVICE. NO LEAKS NOTED.Nov 25, 2023 · N384HA · Airbus A330243SDR I5PA2023111288802Ecu · faultyFLT NO.: MGE300. ESI - NO APU BLEED UPON LANDING. R/R APU ECU PER AMM 49-61-05.Nov 12, 2023 · N888LT · Boeing 757230SDR ASAA2023111146120Unknown · unknownCSS: 1 APU WOULD NOT START (WITH FAULT LIGHT) AT 340. 2 APU WOULD NOT START (FAILED TO START AT 340) 2 TOTAL FAILED STARTS. GROUNDED - YES. APU STARTED NORMALLY ON GROUND. PLACED ON MEL 49-99A. REF B737-900 AMM 49-11-00-860-801. PER SEAMC OK TO CLEAR MEL 49-99Nov 11, 2023 · N492AS · Boeing 737990ERSDR ASAA2023111046119Unknown · unknownWHEN ATTEMPTING APU START. FAULT LIGHT ILLUMINATES. GROUNDED - YES. (RESOLVED ON W/O: 1974686 TASKCARD: N/R-00002 ) APU OPS CHECKS NORMAL REF AMM 49-11-00-710-802. MEL CLEARD, SEAMC WILL NOTIFIED.Nov 10, 2023 · N924AK · Boeing 7379SDR ASAA2023110646043Unknown · unknownAPU FAULT ON STARTUP. RAN QRH. APU FAULT ON SUBSEQUENT ATTEMPT. GROUNDED - YES. ON DEFERRAL.Nov 6, 2023 · N566AS · Boeing 737890SDR ASAA2023110246021Unknown · unknownFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FL340 DURING FIRST AND SECOND TRY. SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED AT FL300. GROUNDED - YES. PER SEAMC DUE TO APU BEING DEFERRED FOR THIS ISSUE, CSS IS CONSIDERED UNSATIFACTORY. APUNov 2, 2023 · N494AS · Boeing 737990ERSDR ASAA2023110146034Unknown · unknownAPU FAILED TO START ON TAXI IN TO GATE AND FAULT LIGHT ILLUMINATED. GROUNDED - YES. ON DEFERRAL.Nov 1, 2023 · N953AK · Boeing 7379SDR ASAA2023110145986Unknown · unknownAPU "FAULT" LIGHT ON GRND START. FAULT CODE 49-41254 (MAINTENANCE CODE) STARTER CONVERTER UNIT SHOWS START SYSTEM INOP. GROUNDED - YES. PERFORMED APU BITE - FOUND FAULT CODE 49-41012. RMVD AND REINSTALLED SCU. STARTED APU 3X - NO ISSUES. SYS OPS NML. REF IFIM Nov 1, 2023 · N971AK · Boeing 7379SDR ASAA2023110145985Unknown · unknownTWO UNSUCCESSFUL APU START ATTEMPTS ON TAXI IN. APU FAULT LIGHT ILLUMINATED BOTH TIMES. GROUNDED - YES. PERFORMED APU BITE AND OPS TEST REF AMM 49-11-00. COULD NOT DUPLICATE THE FAULT. NO DEFECTS NOTED AND OPS NORMAL.Nov 1, 2023 · N938AK · Boeing 7379SDR ASAA2023103145949Unknown · unknownFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FL360. SUCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED. GROUNDED - YES. INFO NOTED CSS UNSUCCESSFUL, PER SEAMC JEREMY MEL 49-99A WILL REMAIN ON AIRCRAFT.Oct 31, 2023 · N494AS · Boeing 737990ERSDR ASAA2023102945922Unknown · unknownFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FL 340. SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED AT FL 340. GROUNDED - YES. ON DEFERRAL.Oct 29, 2023 · N494AS · Boeing 737990ERSDR ASAA2023102945923Unknown · unknownDURING FIRST APU CSS. APU AUTO SHUTDOWN. FAULT LT ILLUMINATED. SECOND START ATTEMPT SUCCESSFUL. GROUNDED - YES. PERFORMED APU BITE FOUND MX MSG 49-41010. PERFORMED APU OPS TEST REF AMM 49-11-00. OPS CHK GOOD. REF L/P 60640599 FOR MEL 49-99A. SEAMC CARLS NOTIFIOct 29, 2023 · N592AS · Boeing 737890SDR ASAA2023102645878Unknown · unknownFAULT LIGHT TRYING TO START APU. ACCOMPLISHED THE QRH AND TRIED AGAIN. BUT GOT THE FAULT LIGHT AGAIN. (ON GROUND). GROUNDED - YES. ON DEFERRAL.Oct 26, 2023 · N453AS · Boeing 737990ERSDR ASAA2023102545844Unknown · unknownAPU FAULT LIGHT ON WHILE ATTEMPTING START. GROUNDED - YES. ON DEFERRAL.Oct 25, 2023 · N952AK · Boeing 7379SDR ASAA2023102345815Unknown · unknownAPU FAULT LIGHT, 2 START ATTEMPTS. GROUNDED - YES. PERFORMED APU OPERATIONAL TEST REF AMM 49-11-00-710-801. FOUND FAULT MAINTENANCE MESSAGE 49-41012 WHILE COMPLETING FIM 49-60 TASK 801. PER MAINTENANCE MESSAGE CHART, FIM TASK 49-40 TASK 803 IS REQUIRED FOR FAUOct 23, 2023 · N453AS · Boeing 737990ERSDR HEEA202310220001Igniter · wornAPU FAIL CAUTION LIGHT ILLUMINATED DURING BEFORE LANDING CHECK. AIRSPEED 120 KIAS. EMERGENCY PROCEDURE PERFORMED.Oct 22, 2023 · N935PH · Skrsky S92ASDR ASAA2023101845725Exciter · faultyAPU WOULD NOT START AND FAULT LT ILLUMINATED. GROUNDED - YES. (RESOLVED ON W/O: 1974128 TASKCARD: N/R-00001 ) VERIFIED FAULT CODE 49-41011 IS IN HISTORY AS LAST LEG. C/W FIM TASK 49-40 TASK 802, NOTED POSITIVE FUEL FLOW ON TROUBLESHOOTING REPLACED IGNITER PLUGOct 18, 2023 · N588AS · Boeing 737890SDR DALA2023102208664Unknown · unknownAIRCRAFT 3511, APU FAILED TO COLD START 3 ATTEMPTS FL390 TEMP-60- PEAK EGT 805. CORRECTIVE ACTION: DEFERRED PER MEL 49-10-01A (19OCT23 MSP - REMOVED THERMOCOUPLE 59KV34 9:00 POSITION. FOUND PIECE ON TIP OF PROBE BROKEN OFF. LOOKED UP TAILPIPE FOR 59KV35 AT THEOct 16, 2023 · N511DN · Airbus A350941SDR ASAA2023101545690Unknown · unknownAPU FAULT ILLUMINATED ON 2 START ATTEMPTS. GROUNDED - YES. ON DEFERRAL.Oct 15, 2023 · N961AK · Boeing 7379SDR ASAA2023101545691Unknown · unknownAPU FAULT SHORTLY AFTER START ON GROUND. GROUNDED - YES. TROUBLESHOT AND FOUND MTX MG #49-41254, STARTER CONVERTER UNIT SHOWS START SYSTEM INOP. PERFORMED B737-9 IFIM TASK 49-40-00-810-818. FAULT IS NOT ACTIVE.Oct 15, 2023 · N915AK · Boeing 7379SDR ASAA2023101545671Unknown · unknownAPU FAULT LIGHT UPON STARTING AFTER LANDING. GROUNDED - YES. CONDUCTED FAULT ISOLATION PROCEDURES PER B737-9 FIM 31-00-00-810-803. NO PRESENT FAULTS. APU START SUCCESSFUL. NO APU FAULT HISTORY. OK FOR SERVICE.Oct 15, 2023 · N952AK · Boeing 7379SDR ASAA2023101345628Generator · inoperativeAPU FAULT LIGHT ILLUMINATED ON START. GROUNDED - YES. (RESOLVED ON W/O: 1973664 TASKCARD: N/R-00002 ) APU SHOWS FAULT 49-41254, START CONVERTER UNIT SHOWS START SYSTEM INOP. REPLACED THE APU SGU REF MM 49-41-01, C/N 14003983 REMOVED, SEAMC NOTIFIED. REF L/P 60Oct 13, 2023 · N983AK · Boeing 7379SDR DXTA2023092896660Starter · faultedDURING LEVEL FLIGHT 380 WE NOTICED THE RIGHT GEN OVERCHARGING AND AMPS VARYING BETWEEN 40 AND 80. RIGHT BATTERY WAS 10 DEGREES WARMER THEN LEFT. FUEL FLTR BYPASS R AMBER CAS: DURING DESCENT FROM 360 WE RECEIVED A FUEL FILTER BYPASS RIGHT AMBER CAS MESSAGE. RESep 28, 2023 · N635QS · Cessna 680CESDR ASAA2023092745361Unknown · unknownAPU WOULD NOT START. APU "FAULT" LIGHT ILLUMINATED. GROUNDED - YES. (RESOLVED ON W/O: 1967194 TASKCARD: N/R-00002 ) ACCOMPLISHED IFIM 49-40-00-810-818. STARTED APU FOR SEVERAL TIMES, STARTED NORMAL. NO ACTIVE FAULTS, NO HISTORY PAST 90 DAYS. THIS CLEARS MEL 49Sep 27, 2023 · N961AK · Boeing 7379SDR SWAA2023092504206Ignition Unit · faulty#2 DRIVE ANNUNCIATOR ILLUMINATED WHILE AT CRUISE FL 400 COMPLIED WITH QRH<[01] REMOVED AND REPLACED #2 IDG PER AMM 24-11-11Sep 24, 2023 · N959WN · Boeing 7377H4SDR AALA202309255778O-Ring · leakingAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND TEH AIRCRAFT RETURNED TP PHL DUE TO A STRONG ODOR FUMES AFTER TAKEOFF. ODOR GOT STRONGER IN CLIMB. FLIGHT ATTENDANTS STATED ODOR WAS STRONGER IN REAR OF AIRCRAFT. ODOR WAS STRONG IN FLIGHT DECK. THE AIRCRAFTSep 23, 2023 · N167AN · Airbus A320*SDR ASAA2023091845201Unknown · unknownFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FL340. SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED. GROUNDED - YES. ON DEFERRAL.Sep 18, 2023 · N428AS · Boeing 737990ERSDR ASAA2023091245115Power Unit · malfunctionedUPON ARRIVAL IN SEA WE ATTEMPTED TO START THE APU. SHORTLY THERE AFTER THE FAULT LIGHT ILLUMINATED. WE TURNED THE APU START SWITCH OFF AND PER THE QRH WAITED FOR THE FAULT LIGHT TO EXTINGUISH. AFTER THE FAULT LIGHT TURNED OFF WE REATTEMPTED TO START THE APU. OSep 12, 2023 · N936AK · Boeing 7379SDR ASAA2023091245083Unknown · unknownAPU FAULT ON FIRST AND SECOND START ATTEMPTS. GROUNDED - YES. FOUND FAULT CODE 49-41012 - NO ROTATION SHUT DOWN. ACCOMPLISHED INITIAL EVAL FOUND FAULT CODE NOT ACTIVE AND APU STARTED. PER IFIM TASK 49-40-00-810-805 FAULT WAS INTERMITTENT. NO HISTORY 30 DAYSSep 12, 2023 · N984AK · Boeing 7379SDR ASAA2023091245114Unknown · unknownAPU FAULT , WOULD NOT START. GROUNDED - YES. FOLLOWE IFIM PRCEDURE 49-40-00-810-805. APU ATARTED SUCCESSFULLY. SAULT WAS NOT ACTIVE AND PWER PARAGRAPH (2) STEP (B) REF LP 60631063 FOR 49-99A MEL.Sep 12, 2023 · N946AK · Boeing 7379SDR ASAA2023091145082Unknown · unknownAPU FAULT LIGHT ILLUMINATED ON FIRST START ATTEMPT. GROUNDED - YES. ACCOMPLISHED IFIM 49-40-00-810-805. NO FAULTS FOUND OR ACTIVE. APU STARTED NORMAL PER IFIM INTERMITTENT FAULT REMOVED MEL 49-11-01 SEAMC LANCE CONTACTED REF LOG PAGE 60547740 FOR 49-99A.Sep 11, 2023 · N956AK · Boeing 7379SDR ASAA2023091145081Unknown · unknownAPU FAULT ON TAXI IN. LIGHT CLEARED WHEN APU SWITCH TURNED OFF. GROUNDED - YES. (RESOLVED ON W/O: 1969292 TASKCARD: N/R-00001 ) PERFORMED INITIAL EVALUATION OF IFIM 49-41254. FAULT INITIALLY SHOWED ACTIVE THEN CLEARED. STARTED APU MULTIPLE TIMES WITH NO DEFECTSep 11, 2023 · N978AK · Boeing 7379SDR ASAA2023091145080Unknown · unknownAFTER LANDING , APU START ATTEMPTED . FAULT APU FAULT ILLUMINATED . NO FURTHER ATTEMPT MADE TO START. GROUNDED - YES. STARTED APU , FAULT CODE 49-41012. NO APU ROATION SHUTDOWN . RUN APU WITHNO FAULTS OR DEFECTS , NO ACTIVE FAULTS LOGGED. FAULT WAS INTERMITTENSep 11, 2023 · N949AK · Boeing 7379SDR ASAA2023091045061Unknown · unknownAPU "FAULT" LIGHT - NO START. GROUNDED - YES. ON DEFERRAL.Sep 10, 2023 · N982AK · Boeing 7379SDR ASAA2023090945030Unknown · unknownAPU FAULT LIGHT ON APU START FOLLOWED QRH, ATTEMPTED SECOND START FAULT LIGHT REAPPEARED, APU DID NOT START. GROUNDED - YES. ON DEFERRAL.Sep 9, 2023 · N938AK · Boeing 7379SDR I5PA2023091075701Starter · faultedFLT NO: N/A (MX INSP.) ESI - APU FAILED TO START. REPLACED APU STARTER.Sep 5, 2023 · N757QM · Boeing 75729JSDR ASAA2023083044873Unknown · unknownAPU MAINT LIGHT ILLUMINATED AFTER START. GROUNDED - YES. RELEASED PER MEL 49-1B APU INOP AUTH BY SEAMC CHRIS 2235Z (18450)PERFORMED (2) OPERATIONAL OPS CK OF APU WITH LOAD NO MAINT LIGHT OPS CK NORMAL NO HISTORY ACFT RELEASED FROM MEL 49-1B SEAMC JEFF NOTIFIEDAug 30, 2023 · N569AS · Boeing 737890SDR ASAA2023082244741Unknown · unknownAPU FAULT ON STARTUP ATTEMPT. GROUNDED - YES. PERFORMED OPERATIONAL TEST OF THE APU IAW AMM 49-11-00-710-802. OPS CHECK GOOD. COULDNT DUPLICATE FAULT. THIS CLEARS MEL 49-11-01. SEAMC RON NOTIFIED. C/N# 22014963. PLACARD REMOVED.Aug 22, 2023 · N963AK · Boeing 7379SDR ASAA2023081844687Unknown · unknown3 CSS START ATTEMPTTS @340 ALL RECEIVED FAULT LIGHT THAT EXTINGUISHED WITH QRH. GROUNDED - YES. PERFORMED APU BITE TEST ON GROUND. FOUND FAULT 49-61259 SPEED SENSOR 1.Aug 18, 2023 · N593AS · Boeing 737890SDR ASAA2023080544523Power Unit · faultyTECHNICAL SERVICES REQUEST APU FAULT REVIEW----(#PRI2/ETOPS)----. GROUNDED - YES. 49 FAULT HISTORY: FAULT 49-41255, START POWER UNIT SHOWS HIGH TEMP DETECTED BY APU CONTROLLER. ON LEGS 1 THROUGH 12. PER B737-9 FIM 49-40-00-810-819. REMOVED AND REPLACED APU SAug 5, 2023 · N948AK · Boeing 7379SDR ASAA2023080444465Unknown · unknownAPU FAULT LIGHT. GROUNDED - YES. ON DEFERRAL.Aug 4, 2023 · N481AS · Boeing 737990ERSDR ASAA2023073144351Unknown · unknownAPU FAULT LT ILLUMINATED AFTER 2 START ATTEMPTS. APU WOULD NOT START. GROUNDED - YES. ON DEFERRAL.Jul 31, 2023 · N962AK · Boeing 7379SDR ASAA2023073044327Unknown · unknownAPU FAILED TO START, FAULT LIGHT ILLUMINATED. GROUNDED - YES. UNDER THE AUTHORIZATION OF SEAMC PHIL, MEL 49-99A CLEARED. T/S NOTES 7/30/23: SERVICED OIL APU. ATTEMPTED START. NO ROTATION. MAINTENANCE MSG 49-41012 PRESENT. STEVE LARSON 55146 07/30/2023. PERFOJul 30, 2023 · N594AS · Boeing 737890SDR ASAA2023073044328Unknown · unknownFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FL360. SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED. GROUNDED - YES. RECIEVED ACARS MSSG AND PER SEAMC STEVE COLD SOACK APU PASSED. REMOVED MEL 49-99A. SEAMC STEVE NOTIFIED. A/C OK FOR SERVICE. Jul 30, 2023 · N514AS · Boeing 737890SDR ASAA2023072044143Unknown · unknownAPU FAILED TO START, SEVERAL ATTEMPTS (NO ROTATION). GROUNDED - YES. ON DEFERRAL.Jul 20, 2023 · N530AS · Boeing 737890SDR ASAA2023071544057Unknown · unknownAPU FAULT LIGHT ILLUMINATED DURING FIRST START ATTEMPT AFTER LANDING. SECOND ATTEMPT WAS SUCCESSFUL. GROUNDED - YES. INTERROGATED CDU FOUND NO EXISTING APU FAULTS, NORMAL START ACCOMPLISHED.Jul 15, 2023 · N948AK · Boeing 7379SDR 4DPA2023071300001Bleed Valve · failedCREW REPORTED APU BLEED AND BLEED 1 FAIL MESSAGE IN CLIMB. RAN QRH AND RETURNED TO LAS. MX OPS TESTED BLEED 1 NO FAULT FOUND. MX TROUBLESHOT APU BLEED AND FOUND BAD APU BLEED VALVE. R&R'D APU BLEED VALVE OPS AND LK CHECK GOODJul 13, 2023 · N931JX · Emb EMB145LRSDR HALA20240712188Exciter · faultedETOPS - APU AUTO SHUTDOWN 2X ON TAXI IN TO GATE. REMOVED AND REPLACED APU EXCITER PER AMM 49-41-38. OPS AND SECURITY CHECK GOOD.Jul 11, 2023 · N217HA · Airbus A321271N
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