JASC 2450
Service difficulty reports · 872
Reports filed under 2450 · AC Power Distribution 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 = '2450' 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 = '2450' 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 AALA20130401005Module · shortedSJO - CREW REPORTED ELECTRICAL ISSUES. EMERGENCY DECLARED FLIGHT RETURNED SJO LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED ELECTRICAL METERS BATTERY AND GALLEY POWER MODULE. SYSTEM GROUND CHECK NORMAL OPERATION.SDR UALA2013032801998Circuit Breaker · shearedFOUND MAIN FWD GALLEY FEEDER "F" CIRCUIT BREAKER HEAD SHEARED OFF. REMOVED & REPLACED MAIN FWD GALLEY FEEDER "F" CIRCUIT BREAKER PER ASM:24-56-01. OPS CHECKED GOOD.SDR AALA20130325016Module · inoperativeDFW - CREW REPORTED INTERMITTANT FAULTS: TAS INPUT FAIL, HDG INPUT FAIL, ALT INPUT FAIL SYNCHRO INPUT FAIL. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NPU CONFIGURATION MODULE. SYSTEM GROUND CHECK NORMAL OPERATION.SDR UALA2013032501823Circuit Breaker · trippedDOOR GIRT BAR ENTRY DIM CIRCUIT BREAKER R34 TRIPPED. CYCLED SYSTEM POWER. OPS CHECKED ARM DISARM LEVER OF ALL MED DOORS FEW TIME, CIRCUIT BREAKER R34 NOT POPPED.SDR UALA2013031501575Relay · inoperativeCEILING LIGHTS INOPERATIVE. REPLACED GROUND SERVICE SELECT RELAY K103 PER AMM 24-51-04 AND GROUND SERVICE TRANSFER RELAY K102 PER AMM, ALL SYSTEMS THAT WERE AFFECTED ARE OK FOR SERVICE, OPS CHECK GOOD.SDR CA130313004Circuit Breaker · overheated(CAN) AFTER PUSHBACK AND PRIOR TO ENGINE START, A FAILURE OF THE CAPTAIN`S PFD, MFD, FMC, AUDIO PANEL, UPPER EICAS AND VHF-L WAS EXPERIENCED. THE ACFT RETURNED TO GATE AND THE FLIGHT WAS CANCELLED. MAINTENANCE INVESTIGATION FOUND EVIDENCE OF HEAT DAMAGE AND SDR UALA2013031201463Electronic Unit · failedNO MID GALLEY POWER, REPLACED ELCU M25135 IN P100 PER AMM 24-51-05, MID GALLEY ELECT POWER ALL NORMAL WITH GROUND POWER. ELCU M25044 IN P100 WAS ALSO REPLACED PER FIM 25-31 TASK 804 FOR MSG 25-31001.SDR ASAA2013030694086Circuit Breaker · failedON TAXI IN, AFTER SHUTTING DOWN NR 2 ENGINE, NO POWER TRANSFER. TRANSFER BUS OFF AND SOURCE OFF LIGHT ILLUMINATED. ACFT WOULD NOT ACCEPT GROUND POWER. APU STARTED AND POWER APPLIED NORMALLY. ACFT GROUNDED. RAN BOTH ENGINES AND TOGGLED NR 2 ENGINE GENERATOSDR A6WA201302624017Contactor · defectiveAT CRUISE RECEIVED A/C ESS BUS CAUTION MSG MOMENTARY, CB PANEL 1 CB C2 POPPED A/C ESS BUS XFER TO AC BUSS 2 ALONG WITH A/C ESS ALTERNATE STAT MSG. AFTER 5 MINS RECEIVED A/C ESS BUS CAUTION AGAIN WITH CB PNL 2 CB C2 POPPED. REMOVED AND REPLACED UTIL BUS CONTASDR FDEA201302210401Buss · malfunctionedON FINAL, RECEIVED "EMER PWR ON" ALERT. AFTER LANDING, RECYCLED EMERGENCY POWER SWITCH AND CPT DISPLAY UNITS 1,2,3 WENT BLANK/DARK WITH NR 2 DISPLAY RED "X". TRIED TO RECYCLE AGAIN WITH NO CHANGE. DUPICATED SYMPTOMS AT BLOCK-IN. ON ELECTRICAL PAGE, FOUNDSDR HNAA2013021900080Relay · failedLT AC BUSS FAILURE IN FLIGHT WITH EMERGENCY LIGHTS FLICKERING. ALSO ASSOCIATED CAUTION LIGHTS ON. R & R 2421-S2 AND 2421-K2. RAN ENGINES FOR OVER 10 MINUTES. OPS CHECKED ALL AC POWER RELATED SYS. NO DISCREPENCIES NOTED AT THIS TIME.SDR WWQA2013F00053Control Panel · failedWHEN BATTERIES ARE TUNED ON THE ENGINE STARTER WILL START TO SPIN. SECOND TIME THIS HAS HAPPENED. HAD TO CHANGE THE GENERATOR CONTROL PANEL THE FIRST TIME 12/30/2011 FOR THE SAME PROBLEM.SDR WWQA991DB21813Control Panel · failedWHEN BATTERIES WERE SELECTED ON, THE LT ENGINE WOULD TRY TO START.SDR CA130213006Relay · failed(CAN) AFTER ARRIVING AT THE GATE IN SLC GROUND POWER WORKING THEN DROPPED OFF-LINE, AFTER DEPLANING AND POWER OFF EXT POWER SPARKED AND POPPED. COCKPIT SMELLED OF SMOKE AND EXTERNAL RECEPTACLE HAS BURN MARK ABOVE IT.SDR CA130213007Adg · deployed(CAN) ON ROTATION, ADG DEPLOYED. BOTH MAIN GENERATORS REMAINED ON-LINE WITH NO POWER INTERRUPTION.SDR FDEA201301280208Relay · failedAFTER TAKEOFF RECEIVED ACFT TIE 1 OFF ALERT. WITH NR 1 IDG DISCONNECTED, LOST LT BUSS AND MOST DISPLAYS ON CAPTS SIDE, EMERGENCY POWER CAME ON. ADG WAS DEPLOYED TO CHARGE BATTERY. FOUND BTR-1/INTFC FAULT CODE. PERFORMED TROUBLESHOOTING IAW FIM 24-20-37, SDR SWAA2013012511885Relay · faultyDIVERSION/DECLARED EMERGENCY -- CAPT MACH/A/S INDICATOR CAPT F/D COMPUTER, CAPT ALTIMETER, CAPT RADAR ALTIMETER, WX RADAR, PWS BOTH FMC, YAW DAMPER, NR 1 COM RADIO AND TRANSFER BUS FAILED WHEN NR 2 ENGINE WAS SHUT DOWN. REMOVED AND REPLACED RELAY PER MM.SDR ASAA2013012193717Buss · malfunctionedSTARTED APU ON LANDING ATTEMPTED TO BRING APU ELECTRICAL POWER ON BUSSES AND WOULD NOT HOLD AFTER 2ND BUSS ATTEMPTED ON TWO ATTEMPTS, ATTEMPTED TO PROVIDE APU BLEED AIR AT GATE ALSO AND THERE WAS ZERO APU BLEED DUCT PRESSURE. APU BITE PROCEDURE AMM TASK 49-60SDR F3LA2012122800822Control Unit · inoperativeAIRCRAFT BEING POWERED BY APU. ALL DROPPED OFF WITH APU STILL INDICATING AVAILABLE - STRONG ODOR OF ELECTRICAL SMOKE IN COCKPIT. R & R GAPCU-(GROUND AUX POWER CTRL UNIT) IAW AMM 24-41-34-400-001-B. CHECKED GOOD IAW AMM 24-41-00-740-002-B.SDR CA121220006Circuit Breaker · shorted(CAN) ON APPROACH TO LAND CREW SELECTED GEAR DOWN, AFTER A FEW SECONDS THEY NOTICED NO MOVEMENT FROM THE GEAR. CREW WENT THRU THE CHECK PROCEDURES AND WHEN GEAR STILL DID NOT MOVE, GEAR WAS MANUALLY EXTENDED. ACFT LANDED WITHOUT INCIDENT. ACFT WAS PLACED ONSDR CA121129004Transformer · failed(CAN) CARRYING OUT A PREFLIGHT INSPECTION ENGINEER NOTED 28V, CB NR 1 TO BE TRIPPED. TROUBLESHOOTING CARRIED OUT AND FOUND AUTOTRANSFORMER T39 TO SHOW SIGNS OF ELECTRICAL ARCING AND TO BE INOPERATIVE. TRANSFORMER REPLACED WITH NEW, SYSTEMS TROUBLESHOT WITH NOSDR WRNA201200015Control Unit · malfunctionedWHILE IN FLIGHT, LEVEL 2 "GEN BUS 3 FAULT" ILLUMINATED. DEPLOYED ADG AND RETURNED TO FIELD (MIA) FOR SAFE LANDING. REPLACED EPCU IAW AMM 24-08-01, GROUND RUN ENGINES, NO DEFECTS NOTED. STOWED ADG IAW AMM 24-25-01. AIRCRAFT RETURNED TO SERVICE.SDR CALA2012110600746Control Unit · malfunctionedINFLIGHT AT FL350, BOTH LT & RT UTILITY BUSS AMBER LIGHTS CYCLED ON AND OFF 4 TIMES IN A 30 MINUTE PERIOD. DIVERTED BACK TO DEPARTURE. TROUBLESHOT IAW FIM 24-20-00, FOUND BPCU INTERMITTENT. R & R BPCU IAW AMM 24-41-03-404-008. UTILITY BUSS SYS OPS CHECKED NSDR HNAA2012110501034Warning Light · illuminatedRT AC BUSS C/L ILLUMINATED INFLIGHT. WITH ASSOCIATED C/L. CONFIRMED OK WITH RT TRU DISABLED.SDR FDEA201210253744Relay · failedAT 5000' 200 KNOTS "BUS RT EMERG AC" ILLUMINATED, RT EMERGENCY AC BUSS FAILED. SELECTED "FADEC ALT", F/O CADC ON 1, TRANSPONDER 1, RAN LEVEL 1 ALERT DUE TO NO APPLICABLE CHECKLIST. TROUBLESHOT IAW FIM: 25-25-01-00 AND WDM: 24-61-51 FOUND RELAY (R2-5157)ATSDR ASAA2012101993156Circuit Breaker · trippedOPEN CIRCUIT BREAKER FOUND ON PREFLIGHT P6-4 (A) BLEED AIR VALVES LEFT. RESET BREAKER REF AMM 20-60-01-860-801, BREAKER REMAINS CLOSED. NO DEFECTS NOTED.SDR SWIA201232000Relay · failedAC ESS BUS CAUTION MESSAGE. (FLT 2982) REPLACED RELAY K1XD IN JB6 IN REFERENCE TO MM.SDR VNAA2012101100006Relay · malfunctionedCREW REPORTED AC ESS (ESSENTIAL) BUS MESSAGE IN FLIGHT. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED AC ESS BUS RELAY AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICESDR A6WA20121008506Relay · failedON TAKEOFF ROLL, RECEIVED "AC ESS BUS" CAUTION & "EMER LIGHTS ON" STATUS MESSAGE. RAN QRH, MESSAGE REMAINED. RETURNED TO DCA. NOTED NO ACCESS, BUS SYSTEMS APPEARED AFFECTED. INSTALLED NEW A/C ESSENTIAL BUS RELAY (K1XD) AND COMPLIED WITH OPS CHECKS. NO DISSDR UALA2012100505657Relay · failedCREW REPORTS THE FOLLOWING CB'S WERE FOUND OPEN UPON ARRIVAL TO FLT DECK. GRID A11, C10, C12, E11, A6 ALL ON THE OVERHEAD. CREW ALSO NOTED SLIGHT ELECT ODOR IN FLT DECK. ALL OF THE C/B'S ABOVE WERE ON THE 115VAC STBY BUS. FOUND MAIN STATIC INV INOP AND DAMSDR XGNA2012F00003Circuit Breaker · intermittentLANDING LIGHT CIRCUIT BREAKER INTERMITTENT. THIS CIRCUIT BREAKER WAS REPLACED BY AD2008-13-17 IAW SB24-3807. NEW SWITCH CALLED FOR IN THE AD/SB 34-24-3807 IS INFERIOR TO THE SWITCH IT HAS REPLACED.SDR UALA2012092405412Bpcu · faultyAFTER TAKEOFF LOST GALLEY POWER IN AFT ON LEFT SIDE. CYCLED UTILITY BUSES TO FIX. REPEAT WRITEUP. REMOVED AND REPLACED BPCU. OPS CHECKED NORMAL AT THIS TIME. OK TO CONTINUE FOR SERVICE IAW AMM CHP 24-41-03. NO FAULTS NOTED AT THIS TIME.SDR IXXA20120911025OCircuit Breaker · failedAFTER TAKEOFF AIRCREW RECEIVED 2 EICAS MESSAGES. RT FORWARD FUEL PUMP FAULT AND LT AFT FUEL PUMP FAULT. RETURNED TO STATION. R & R RT FWD/ LT AFT CIRCUIT BREAKER M16 IAW WDM 28-22-11. OPS CHECKED GOOD.SDR UALA2012091005094Panel · malfunctionedELMS P310 CHANNEL ONE, BUT NOT BOTH, OF THE ELECTRICAL LOAD MANAGEMENT SYSTEM (ELMS) 310 PANEL CHANNEL IS FAULTY. RPL- :GOT MSG 24-13092. REPLACED M24406A1 PER MM, OPS TEST NORMAL, NO STATUS MSG PRESENT.SDR YWYR201209159368Master Switch · damagedPILOT REPORTED THAT ACFT MASTER SWITCH WOULD NOT ACTUATE ACFT POWER ON SEVERAL OCCASIONS. IF THE MASTER SWITCH WAS CYCLED ON AND OFF SEVERAL TIMES IT WOULD EVENTUALLY TURN ACFT POWER ON. NEW MASTER SWITCH INSTALLED AND OPERATION WAS NORMAL.SDR ASOA2012090402164Relay · unserviceableDURING CLIMBOUT, RECEIVED AN AC ESSENTIAL CAUTION MESSAGE INTERMITTENT RAN QRH AND SWITCHED TO AC ESSTENTIAL TRANSFER, IT MADE NO DIFFERENCE-RETURNED TO DEPARTURE. ACFT RETURNED TO DEPARTURE AFTER TAKE OFF. EMERGENCY DECLARED. R & R ESSTENTIAL BUSS RELAY. SDR KCSA20120829011Circuit Breaker · failedON DESCENT NR 4 ENGINE FUEL CONDITION ACTUATOR CIRCUT BREAKER STARTED SMOKING, CIRCUT BREAKER PULLED, SMOKE STOPPED. REMOVED AND REPLACED THE NR 4 FUEL CONDITION ACTUATOR CIRCUIT BREAKER IAW B747-200 MM 24-50-01 AND OPS CHECKED GOOD IAW B747-200 MM 76-11-00 WSDR UALA2012082904865Control Unit · failedEXTERNAL POWER EGIU CIRCUIT BREAKER TRIPPED. REPLACED EGCIU1 PER MM, CHECKED GOOD.SDR A6WA201240776Contactor · faultyAPU VOLTAGE OUTPUT BOUNCES BETWEEN 115 AND MID 80'S. REF WO 182603 FOR REPLACEMENT OF CONTACT K1XB BUSBAR 2W5XA & WORE XB2 A2OB OPS CHECK GOOD AT THIS TIME REMOVED PLACARD/MEL.SDR UALA2012081604535Transformer · faultyGROUND POWER TRANSFORMER RECTIFIER UNIT CHG. REMOVED & REPLACED EXTERNAL POWER TRANSFORMER RECTIFIER IAW MM, OPS CHECKED NORMAL.SDR UALA2012080104132Relay · burnedAFTER SWITCHING FROM APU TO GROUND POWER, POWER DROPPED OFF WITH ELECTRICAL BURNING ODOR IN E/E BAY AND FLIGHT DECK. FOUND AT P300 AUX PANEL, SOURCE OF BURNED ODOR. CONTACT RELAY ON PANEL WAS BURNED. REMOVED CONTACT C24335 AND FOUND D432 DAMAGED AND RELAY CSDR UIEA2012071500323Circuit Breaker · failedLEFT AC BUSS OFF- COMPLIED WITH QRH AND RETURNED TO DEPARTURE. (R & R RELAY K863) (LEFT TRANSFER BUSS RELAY), AND "A" PHASE CIRCUIT BREAKER UNIT C313, BOTH OPS CHECKED GOOD, ENGINE RUN ALSO OPS CHECKED GOOD. FAULT CLEARED, IAW AMM 24-25-00, AND 24-51-11, 24-22SDR UALA2012071603843Circuit Breaker · damagedCIRCUIT BREAKER C-14 ON P6-3 PANEL, LABELED "115 VAC BUS L SECT 2", TOP IS SHEARED OFF. MAINT TEXT: CORRECTION: SHOULD READ "SECT 1". REPLACED CIRCUIT BREAKER C313 (WDM 24-51-11). OPERATIONAL TEST OF P11-3 POWER MM TASK 24-50-00-715-003, EICAS DISPLAYS ANDSDR UIEA2012071100315Circuit Breaker · failedLEFT AC BUSS INTERMITTENT ON ENGINE SHUTDOWN. FOUND LT GENERATOR CONTROL CIRCUIT BREAKER T-1 CONTACT OPEN DURING FAULT. R & R LT GENERATOR CONTROL CIRCUIT BREAKER IAW AMM 24-22-03, SYS OPS CHECKED GOOD.SDR UALA2012070903671Circuit Breaker · malfunctionedCENTER TANK WON'T TAKE FUEL. CYCLED BREAKER AND NOW BOTH VALVES OPENED AND CENTER TANK TAKES FUEL.SDR YYFA20120703001Buss · failedLT AC BUSS FAILED TO POWER AFTER ENGINE START, FAILED INSTRUMENTS AND INDICATIONS ON CAPTAINS FMA, LT ENGINE PARAMETERS, AND PFD. AC CROSS TIE NOTED BUT BUT FAILED TO RESET. MX PERFORMED THE FOLLOWING: RESET AC CROSS TIE RELAY IAW AMM 71-00-00, CW AC CROSSSDR C77A2012F00108Sensor · burnedON RT ENGINE START, BATTERY INDICATION DASHED OUT ON MFD. AFTER EXTENSIVE TROUBLESHOOTING FOUND ACFT ELECTRIAL LOAD SENSOR BURNED AND CAUSING THE INDICATION PROBLEM.SDR HALA2012060200155Circuit Breaker · malfunctionedFOUND LT GENERATOR DRIVE LIGHT DID NOT ILLUMINATE WITH LT ENG SHUTDOWN. LT GENERATOR DRIVE LIGHT TESTS GOOD WITH LAMP TEST SWITCH. CLEANED & INSPECTED LT IDG DISC CONNECTOR RAN ENG NR 1 NO HELP. RESET BPCU C/B & RESET PG A1 BATTERY BUS DISTR C/B RAN NR 1, ENSDR AALA20120511004Control Unit · faultyJFK - CREW REPORTED DURING CLIMB, BOTH UTILITY BUSES DROPPED OFF LINE AND COULD NOT BE RE-INSTATED. EMERGENCY DECLARED FLIGHT RETURNED JFK LANDED WITHOUT INCIDENT. AFTER LANDING, BOTH UTILITY BUSES CAME BACK ON LINE WITHOUT THE CREW DOING ANYTHING. AIRCRAFTSDR UALA2012042002387Relay · failedRTO AUTOBRAKES TRIPPED OFF DURING NR 2 ENG START PWR TRANSFER. REPLACED LEFT AND RIGHT UTILITY BUSS RELAYS, RAN BOTH ENGINE & OPS CHECK GOOD WITH IMMEDIATE RESPONSE. RETURN TO SERVICE.
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