N512AS

Service difficulty reports · 394

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. 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 n_number = 'N512AS' AND registry_match = 'registration'
  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 ASAA2023022242049Processing Unit · faultyLEFT FUEL QUANTITY AND TOTAL FUEL QUANTITY INDICATORS CONTINUOUSLY BLANK OUT FOR ABOUT 11 SECONDS THEN REAPPEAR. GROUNDED - YES. 8 FLIGHT LEGS OF FQIS PROCESSOR FAULURE CODE 28-41109. RMVD & RPLCD FUEL QTY PROCESSOR UNIT REF B737-800 AMM 28-41-81. OPS NORMAL PFeb 22, 2023 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2023021841981Relay · faultyWHILE IN CRUISE AT FL340, AUTOPILOT B DISCONNECTED, COMPLIED WITH QRH, WOULD NOT STAY ENGAGED, TRIED AUTOPILOT A AND IT DISCONNECTED AS WELL, AND WOULD NOT STAY ENGAGED. THEN NEITHER AUTO PILOT WOULD ENGAGE AT ALL. NO OTHER ANORMALIES, NO CIRCUIT BREAKERS POPPFeb 18, 2023 · N512AS · Boeing 737890 · Autopilot SystemSDR ASAA2023021741980Unknown · unknownCONT CAB ZONE TEMP ILLUMINATES ON RECALL & RESETS WITH MC RESET. GROUNDED - YES. ACCOMPLISHED BITE CK ON TEMP CONTROLLERS, FOUND FLT DECK TRIM VALVE FAULT, RESET FAULT. ACCOMPLISHED TEMP CONTROLLER OP CK NO FAULTS NOTED, REF B737-800 AMM 21-61-00-700-506-002 AFeb 17, 2023 · N512AS · Boeing 737890 · Cabin Temperature Control SystemSDR ASAA2023021241927Module · faultyLEFT SIDE WINDOW OVERHEAT. GROUNDED - YES. REPLACED P5-9 MODULE REF AMM 30-41-41 ACCOMPLISHED PITOT PROBE/AOA & TAT PROBE HEATER TEST REF AMM 30-31-00. OPS NORMAL.Feb 12, 2023 · N512AS · Boeing 737890 · Ice/Rain Protection SystemSDR ASAA2022112940986Motor · no testRH AFT MAIN TANK FUEL BOOST PUMP LOW PRESSURE LIGHT IS ILLUMINATED WITH BOOST PUMP SWITCH SELECTED ON. GROUNDED - YES. REMOVED AND REPLACED #2 AFT BOOST PUMP PER B737-800 AMM 28-22-41, OPS CHECK GOOD. NO LEAKS NOTED.Nov 29, 2022 · N512AS · Boeing 737890 · Fuel Boost PumpSDR ASAA2022112940967Bleed Valve · faultyP6-4 BLEED AIR VALVES LEFT CIRCUIT BREAKER FOUND OPEN DURING PRE-FLIGHT. GROUNDED - YES. P6-4,A7 C796 C/B POPPED OPEN AFTER RESET REF SSM 36-11-11-102 REMOVED CONNECTOR DP1102 FOR #1 ENG BLEED AIR REGULATOR M1180,CB STAYS IN WITH #1 ENG BLEED SWITCH ON. REMOVENov 29, 2022 · N512AS · Boeing 737890 · Compressor Bleed ValveSDR ASAA2022110940751Warning Light · false activationLEFT SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED DURING FLIGHT. GROUNDED - YES. RAN QRH PROC AND THE OVERHEAT LIGHT DID NOT RE ILLUMINATE. IT STAYED OUT.Nov 9, 2022 · N512AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2022102040409Autopilot Sys · disengagedAUTOPILOT DRIFTED TO LATERAL LIMIT AT 50 FT. AUTOPILOT DISENGAGED AND AIRCRAFT HAND FLOWN TO TOUCHDOWN. RWY 16R, CRITICAL AREA CLEAR. WIND 180/7KTS. GROUNDED - YES. DFCS INFLIT FAULTS SHOWS NO RELEVANT DFCS MSG FOR ONT 20/19 FLT LEGS CH A OR B. PERFORMED ALLOct 20, 2022 · N512AS · Boeing 737890 · Autopilot SystemSDR ASAA2022101040234Shim · wornWHILE ACCOMPLISHING FAN LUBE ASA T/C 78472010, #1 ENGINE FOUND ALL SHIMS TO BE WORN. GROUNDED - YES. REMOVED AND REPLACED ALL #1 ENGINE SHIMS PER ASA T/C 78472010.Oct 10, 2022 · N512AS · Boeing 737890 · Turbine Engine Air Inlet SectionSDR ASAA2022101040233Spacer · unbondedWHILE ACCOMPLISHING FAN LUBE ASA T/C 78472010, #1 ENGINE, FOUND #10 SPACER ELASTOMER STRIP UNBONDED. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE, #10 SPACER ELASTOMER STRIP PER ASA T/C 78472010.Oct 10, 2022 · N512AS · Boeing 737890 · Turbine Engine Air Inlet SectionSDR ASAA2022100840196Modulating Valve · faultyON RECALL RECEIVED A "ZONE TEMP" CONT CAB MASTER CAUTION LIGHT. RESETS ON MC LIGHT PUSHED. GROUNDED - YES. REMOVED AND REPLACED TRIM AIR MODULATING VALVE PER B737-800 AMM 21-61-21.Oct 8, 2022 · N512AS · Boeing 737890 · Cabin Temperature Control SystemSDR ASAA2022072339181Transceiver · faultyRADAR DOES NOT DEPICT THUNDERSTORMS, APPEARS TO HAVE LOW POWER OUT OR BAD RECEPTION AS ONLY PARTIAL RETURNS ARE DISPLAYED. IMPROVES SLIGHTLY WITH GAIN INCREASE BUT STILL UNSAT. GROUNDED - YES. REMOVED AND REPLACED WEATHER RADAR TRANSCEIVER. OPS CHECK NORMAL. BJul 23, 2022 · N512AS · Boeing 737890 · Independent Position Determining SystemSDR ASAA2022051038272Circuit Breaker · poppedAFTER PUSH AND ENGINE START HAD R ELEV PITOT AMBER LIGHT RUN QRH, FOUND CB POPPED. GROUNDED - YES. VERIFIED DEFECT, REMOVE AND REPLACE R/H ELEVATOR PITOT PROBE REF B737-800 AMM 27-31-94. OPS AND LEAK TEST PASSED.May 10, 2022 · N512AS · Boeing 737890 · Pitot/Static Anti-Ice SystemSDR ASAA2022050138186Modulating Valve · faultyZONE TEMP CAUTION LIGHT ILLUMINATES DURING RECALL. GROUNDED - YES. REPLACED THE CONTROL CABIN TRIM AIR MODULATING VALVE, LEAK AND OPS CHECK GOOD REF B737-800 AMM 21-61-21/401 AND B737-800 FIM 21-62 TASK 842.May 1, 2022 · N512AS · Boeing 737890 · Cabin Temperature Control SystemSDR ASAA2022041037931Fitting · detachedF/A HANDED ME THE R2, FWD, SLIDE, FLOOR FITTING. GROUNDED - YES. REPLACED R2 FWD FITTING MOUNTING HARDWARE - REINSTALLED FLOOR FITTING REF B737-800 AMM 25-66-02.Apr 10, 2022 · N512AS · Boeing 737890 · Emergency EquipmentSDR ASAA2022033037853None · faultyLEFT PACK ILLUMINATES ON MASTER CAUTION RECALL. GROUNDED - YES. ACCOMPLISHED PACK ZONE TEMPERATURE BITE PER B737-800 AMM 21-61-00-700-806-002 LH PACK FAULTED TEMP CONTROL VALVE. REMOVED AND REPLACED L/H TRIM MODULATING VALVE IAW AMM 21-61-21/401 OPS CHEK NORMAMar 30, 2022 · N512AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2022032337759Valve · faultyRIGHT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL, LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. DURING BITE RH TEMP CONTROL VALVE FAULTED. REMOVED AND REPLACED RH TEMPERATURE CONTROL VALVE IAW B737-800 AMM 21-51-10-000-801 AND AMMar 23, 2022 · N512AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2022021837511Unknown · unknownBOTH FMC'S INTERMIENTLY INOP. GROUNDED - YES. PERFORMED RESET ON BOTH FMC'S IAW B737-800 FIM 34-61 TASK 836 OPERATIONAL CHECK ON,Feb 18, 2022 · N512AS · Boeing 737890 · Flight Management Computing Hardware SystemSDR ASAA2022021037404Unknown · unknownRIGHT PACK LIGHT ILLUMINATED ON RECALL. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-62 TASK 801. RIGHT TCV FAULT ON BIT & PREV FLT. TCV CLEARED ON VERIFY.Feb 10, 2022 · N512AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2022020637349Unknown · unknownON RECALL CONT CAB ILLUMINATED. EXTINGUISHED WHEN MASTER CAUTION RESET. GROUNDED - YES. CHECKED AND CONFIRMED FLT TCV RESET AND RAN BITE ANOTHER TIME PER B737-800 AMM 21-61-00. ALL PASS "GO" WITH NORMAL OPS.Feb 6, 2022 · N512AS · Boeing 737890 · Cabin Temperature Control SystemSDR ASAA2022012037225Unknown · unknownRIGHT PACK ILLUMINATES ON MASTER RECALL RESETS WITH MASTER CAUTION. GROUNDED - YES. FOUND PZTC 2 TCV FAULT. CW B737-800 FIM 21-61 TASK 801 AND FAULT RESET.Jan 20, 2022 · N512AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2022011737187Processing Unit · faultyCTR TANK & TOTAL FUEL QTY INDICATIONS DISAPPEAR DURING CRUISE FLIGHT. GROUNDED - YES. PERFORMED FQIS BITE REF B737-800 FIM 28-41 TASK 801. ON LEG 1, FOUND FAULTS 28-41310 AND 28-41309 PROCESSOR FAULT AND PROCESSOR FAILED. SAME FAULTS WERE FOUND ON LEG 2. REMOVJan 17, 2022 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2022011737186Unknown · unknownIN CRUISE THE CENTER FUEL GUAGE DISPLAY BLANKED OUT. GROUNDED - YES. PFMD FQIS BITE PER B737-800 FIM 28-41 TASK 801 CENTER TANK FUEL QTY RESET W/ NO FAULT FOUND. REF FIM 28-41 TASK 813.Jan 17, 2022 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2022010937113Lens · brokenF/A REPORTS EMERGENCY EXIT LIGHT NEAR FLOOR BY L1 DOOR APPEARS BROKE. GROUNDED - YES. REPLACED WITH NEW AS REQ.Jan 9, 2022 · N512AS · Boeing 737890 · Emergency LightingSDR ASAA2021122136974Compensator · faulty#1 FQIS FAILS SYSTEM TEST. COMPENSATOR PROBE F15 AND PROBES TU7, TU8, TU10, AND TU11 ARE OUT OF ACCEPTABLE CAPACITANCE VALUES. GROUNDED - YES. REMOVED AND REPLACED #1 FQIS COMPENSATOR PROBE AND PROBES TU7, TU8, TU10, AND TU11. ALL PROBES REPLACED PER B737-800 Dec 21, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021120836858Unknown · unknownRIGHT FMC FAILED. RAN QRH PROCEDURE AND WAS ABLE TO RESTORE DUAL FMC OPERATIONS. GROUNDED - YES. PERFORMED B737-800 FIM 34-61 TASK 836 AND FIM 34-61 TASK 801. ALL TESTS OPS CHECK GOOD. CONFIRMED INTERMITTENT FAULT. NO FURTHER ACTIONS NECESSARY. OK FOR SVC.Dec 8, 2021 · N512AS · Boeing 737890 · Flight Management Computing Hardware SystemSDR ASAA2021120736834Probe · failed#2 MAIN TANK FQIS FAILS SYSTEM TEST REF B737-800 AMM 28-4100-730-801. GROUNDED - YES. REMOVED AND REPLACED PROBES TU1, TU7, TU8 AND TU10. REF B737-800 AMM 28-41-21. ALL PROBES NOW WITHIN ACCEPTABLE LIMITS AND SYSTEM TEST GOOD REF AMM 28-41-00--730-801.Dec 7, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021120636828Indication Sys · faultedAS IT PERTAINS TOTHE FUEL GAUGE MEL, WE MANUALLY ENTERED THE FUEL QUANTITY ON THE PERF INIT PAGE. TAKE OFF V-SPEEDS DISPLAYED PROPERLY. UPON LIFT OFF AND ACCELERATING THE FLAP MANEUVERING SPEEDS DID NOT DISPLAY. POSSIBLE BECAUSE THE MANUAL ENTRY FOR FUEL ON BODec 6, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021120536826Indicator · faultyRIGHT MAIN FUEL QUANTITY READOUT INOP - BLANKED OUT ON CLIMBOUT. GROUNDED - YES. VERIFIED DISCREPANCY, REFUEL PANEL #2 TANK ALSO SHOWS NO F/Q IND. FQIS CURRENT STATUS AND GND TEST SHOW NO FAULTS, FQIS INPUT MONITORING SHOWED NORMAL INFO FOR #2 TANK. REF B737-8Dec 5, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021120536797Unknown · unknownRIGHT FUEL TANK AND TOTAL FUEL QUANTITY INTERMITTANT. BEGAN IN DESCENT AND CONTINUED UNTIL PARKING. GROUNDED - YES. PERFORMED FQIS BITE TEST REF B737-800 FIM 28-41 TASK 801 PAST FLIGHT LEG SHOWS FAULT 28-41109 PROCESSOR FAILED. FQIS BITE TEST PASSES.Dec 5, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021112936759Lens · damagedEMERGENCY LIGHT EXIT LOCATOR SIGN ADJACENT TO L-2 DOOR HAS DAMAGED LENS. GROUNDED - YES. REMOVED AND REPLACED LENS AND TESTED SIGN PER B737-800 AMM 33-51-01-960-801 - OPS NORMAL.Nov 29, 2021 · N512AS · Boeing 737890 · Emergency LightingSDR ASAA2021112836721Unknown · unknown#1 FUEL QTY GAUGE & TOTAL FUEL QTY GAUGES DISAPPEAR AND REAPPEAR. GROUNDED - YES. PERFORMED FQIS BITE TEST REF B737-800 FIM 28-41 TASK 801 & TASK 808. NO DEFECTS FOUND ON SELF TEST. AS PRECAUTION, PERFORMED BITE TEST FOR DEU'S 1 & 2 REF FIM 31-62 TASK 802. NO Nov 28, 2021 · N512AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021100236158Starter · noneFOUND ENG #2 STARTER MAGNETIC PLUG CONTAMINATED OVER LIMITS. GROUNDED - YES. REMOVED AND REPLACED ENG #2 STARTER. OPS CHECK GOOD & LEAK CHECK GOOD REF B737-800 AMM 80-11-01.Oct 2, 2021 · N512AS · Boeing 737890 · Engine CrankingSDR ASAA2021092336069Unknown · unknownAUTOTHROTTLE WILL NOT REMAIN ENGAGED. LEFT THROTTLE DOES NOT MOVE WITH AUTOTHROTTLE-RIGHT THROTTLE SEEMS TO MOVE. GROUNDED - YES. INITIAL EVALUATION, PERFORMED A/T INTERACTIVE TESTS IAW B737-800 AMM 22-31-00-710-802. A/T ENGAGED AND DISENGAGED APPROPRIATELY WISep 23, 2021 · N512AS · Boeing 737890 · Auto Throttle SystemSDR ASAA2021090935933Ecu · intermittentAPU FAULT LIGHT ILLUMINATED ON START. GROUNDED - YES. PERFORMED BITE CHECK, NO CURRENT FAULTS, FAULT HISTORY SHOWS FAULT CODE 49-15004. THIS FAULT CODE HAS HISTORY SINCE 04/14/2021. REFERENCING B737-800 FIM 49-10 TASK 806, VERIFIED APU INLET DOOR ACTUATOR AND Sep 9, 2021 · N512AS · Boeing 737890 · APU Start/Ignition SystemSDR ASAA2021090535871Sensor · faulted#2 ENG MAINTENANCE MESSAGES 73-30902 (T12 SIGNALS DISAGREE), 73-21702 (ADIRU TAT DATA AND THE T12 SIGNAL DISAGREE) AND 73-20812 (THE T12 SIGNAL IS OUT OF RANGE). DEFERRED PER T/C 78273000. GROUNDED - YES. REF B737-800 FIM 73-26 TASK 805 REPLACED T12 SENSOR REFSep 5, 2021 · N512AS · Boeing 737890 · Fuel Controlling SystemSDR ASAA2021090335851Warning Light · false activationLEFT PACK LIGHT COMES ON DURING MASTER CAUTION RECALL. GROUNDED - YES. FOUND TCV FAULT ON #1 PACK CONTROLLER PERFORMED B737-800 FIM 21-61 TASK 801, OPS CHECK PASSES TWO TIMES ON BOTH #1 AND #2 PACK CONTROLLER. A/C OK FOR SERVICE.Sep 3, 2021 · N512AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2021081335705Eec · faultedDURING "AFTER ENGINE CHANGE" TESTING - MULTIPLE FAULTS LOGGED DURING EEC BITE TEST AND ACUATOR TESTS. GROUNDED - YES. REMOVED AND REPLACED EEC ON #1 ENG REF AMM TASKS 73-21-60-000-801-F00 AND TASK 73-21-60-400-801-F00. PERFORMED FADEC SYSTEM TEST REF TASK 73-2Aug 13, 2021 · N512AS · Boeing 737890 · Fuel Controlling SystemSDR ASAA2021081035685Turbine Wheel · distressedPER MAINTENANCE CONTROL, SEA ACCOMPLISHED THE FOLLOWING DEFECT: WHILE ACCOMPLISHING TASK CARD #78472022 "SDI BOROSCOPE ENGINE HPT BLADES" #2 ENGINE S/N 895170 FOUND 2 FULL CRACKS ON ONE LPT SEGMENT WITH 3 EACH HOLES (LESS THAN 0.0390 SQ INCH AREA) AND RADIAL CAug 10, 2021 · N512AS · Boeing 737890 · Turbine SectionSDR ASAA2021080735723Engine · faultyAFTER SHUTDOWN EGT DIGITAL READOUT BOX TURNED RED ON #2 ENGINE NO ABNORMAL INDICATIONS NOTED PRIOR TO THE RED BOX. GROUNDED - YES. #2 ENG. REPLACED, TRANSFERRED TO EBU SHOP W/O 1882177 SEAMC WILL NOTIFIED.Aug 7, 2021 · N512AS · Boeing 737890 · Engine Temperature Indicating SystemSDR ASAA2021072535526Autothrottle Sys · faultedAUTOTHROTTLE WILL NOT STAY ENGAGED, DURING TAKEOFF THE #2 THRUST LEVER LAGGED BEHIND #1. HAD TO BE PUSHED UP MANUALLY. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 22-31 TASK 801 NO FAULTS FOUND DURING BITE CHECK. COMPLETED ALL A/T INTERACTIVE TESTS ALL TESTS PASJul 25, 2021 · N512AS · Boeing 737890 · Auto Throttle SystemSDR ASAA2021062335149Hf Comm · malfunctionedHF-1 SHOWS FAIL IN ACP MCU. GROUNDED - YES. RESET HF 1 C/B PERFORMED BITE TEST REF B737-800 FIM 23-11 TASK 801 NO FAULTS FOUND OP CHECK OK. A/C OK FOR SERVICE.Jun 23, 2021 · N512AS · Boeing 737890 · HF Communications SystemSDR ASAA2021061835130Switch · faultedAPU FAULT LIGHT ILLUMINATED UPON UNSUCCESSFUL APU START. GROUNDED - YES. REMOVED AND REPLACED AIR INLET DOOR POSITION SWITCH REF B737-800 AMM 49-15-41 APU STARTS AND OPERATES NORMALLY. GROUND VERIFICATION SUCCESSFUL.Jun 18, 2021 · N512AS · Boeing 737890 · Airborne Auxiliary Power Unit (APU) SystemSDR ASAA2021061035093Warning Message · false activationRED BOX EXCEEDANCE ON #2 EGT. GROUNDED - YES. CDU #2 ENGINE EXCEEDANCE PAGE SHOWS 964 DEG FOR 16 SECONDS. EXCEEDANCE WITHIN AREA "A" REF FIG 603 B737-800 AMM 71-00-00. INSPECTED INLET AND EXHAUST NO DEFECTS NOTED. REF B737-800 FIM 71-06 TASK 805 AND TECH SERVIJun 10, 2021 · N512AS · Boeing 737890 · Engine Temperature Indicating SystemSDR ASAA2021060235003Actuator · intermittentAPU WILL NOT START, FAULT LIGHT ILLUMINATED. GROUNDED - YES. APU BITE TEST SHOWS MSG 49-15004, INLET DOOR SHUT DOWN IAW B737-800 FIM 49-10 TASK 806, REMOVED AND REPLACED AIR INLET DOOR ACTUATOR IAW B737-800 AMM 49-15-31. ACCOMPLISHED AIR INLET DOOR TEST REF AMJun 2, 2021 · N512AS · Boeing 737890 · APU Core EngineSDR ASAA2021060235000Lamp · inoperativeL/H OVERWING FWD EMERGENCY LT INOP. GROUNDED - YES. RELAMP L/H OVERWING FWD EMERGENCY LT PER B737-800 AMM 33-51-04, OPS CHECK GOOD.Jun 2, 2021 · N512AS · Boeing 737890 · Emergency LightingSDR ASAA2021052634982Blade · crackedWHILE ACCOMP #1 ENG S/N 897424 HPT BLADE INSPECTION TC 78472022. FOUND ONE LPT 1ST STG NGV @ APPROX 3CLOCK POSN AFT LOOKING FWD. HAD ONE FULL CRACK WITH INTERSECTING RADIAL (1 EACH) LESS THAN ONE INCH IN LENGTH. GROUNDED - YES. #1 ENG ESN 897424 REMOVED AND RMay 26, 2021 · N512AS · Boeing 737890 · Turbine SectionSDR ASAA2021052334895Lamp · inoperativeROW 16 AC RIGHT EXIT SIGN LIGHT INOP. GROUNDED - YES. RELAMPED, CHECKS GOOD.May 23, 2021 · N512AS · Boeing 737890 · Emergency LightingSDR ASAA2021052134872Fmc · intermittentFMC L AND R IMTERMITTENT OFF THEN ON. GROUNDED - YES. ACCOMPLISHED FMC BITE B737-800 FIM 34-61 TASK 801 NO FAULTS FOUND OPS CHECK NORMAL.May 21, 2021 · N512AS · Boeing 737890 · Flight Management Computing Hardware SystemSDR ASAA2021051534821Eec · faultedAPU WONT START (LOW OIL PRESSURE AND FAULT LT ON). GROUNDED - YES. PERFORMED APU BITE B737-800 FIM 49-60-TASK 801. NO ACTIVE FAULTS FOUND. HISTORY SHOWED SEVERAL 49-15004. DUE TO HISTORY REMOVED AND REPLACED ECU REF B737-800 49-61-12/401. STARTED AND RAN APU 4May 15, 2021 · N512AS · Boeing 737890 · APU Start/Ignition System
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