N493AS

Service difficulty reports · 213

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 = 'N493AS' 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 ASAA2025111962623Transition Panel · corrodedRIGHT TRANSITION SIDEPLATE IS CORRODED BETWEEN BS 727G+12 TO 767. GROUNDED - YES. REPAIRED TRANSITION SIDEPLATE BS 727G+12 TO 767 IAW SRM 53-00-53-2R-5. W 1, O .063, R .000, L 3, D .063.Nov 19, 2025 · N493AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025111962622Transition Panel · corrodedLEFT TRANSITION SIDEPLATE IS CORRODED BETWEEN STA 727G+12 TO 747+12. GROUNDED - YES. REPAIRED LT TRANSITION SIDEPLATE STA 727F+12 TO 747+12 IAW B737-900 SRM 53-00-53-2R-5. W 1.3, O .040, R .015, L 15, D.025.Nov 19, 2025 · N493AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025071259470Battery · inoperativeEMERGENCY LIGHT BATTERY M1675 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY M1675 IAW B737 AMM 33-51-06-960-806. (S/N 82958)Jul 12, 2025 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2025071259469Power Supply · inoperativeEMERGENCY LIGHT BATTERY M1676 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY M1676 IAW B737 AMM 33-51-06-960-806. (S/N 129042)Jul 12, 2025 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2025030656478Door · bindingCSA REPORTS L1 DOOR DIFFICULT TO OPEN + CLOSE. GROUNDED - YES. OPS CHECK L1 DOOR OPEN + CLOSE. DOOR OPERATION GOOD AT THIS TIME. REF AMM 52-11-00.Mar 6, 2025 · N493AS · Boeing 737990ER · Passenger/Crew DoorsSDR ASAA2025030656470Light · detachedFA'S REPORT ROW 13 FLOOR LIGHTING BUBBLED @ ROW 13. GROUNDED - YES. REMOVED + REINSTALLED A/C RIGHT FLOOR PHOTOLUMINESCENT STRIP BETWEEN ROWS 12DEF AND 15DEF. FLOOR PHOTOLUMINESCENT STRIP SECURE AT THIS TIME WITH NO OTHER DEFECTS NOTED REF AMM 33-51-15. SEAMC Mar 6, 2025 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2024111453898Light · detachedEMERGENCY LIGHT ABOVE 27ABC POPPED OUT. GROUNDED - YES. REINSTALLED EMERGENCY AISLE LIGHT ABOVE SEAT 27ABC, OPS CHECK NORMAL PER AMM 33-51-03.Nov 14, 2024 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2024082652105Lens · missingFA FOUND EMERGENCY COVER AIRCRAFT RIGHT ON THE FLOOR. GROUNDED - YES. (RESOLVED ON W/O: 2012360 TASKCARD: N/R-00001 ) REPLACED EMERGENCY EXIT LIGHT LENS AT SEAT ROW 17F PER AMM 33-51-01 OPS CHECKED GOOD. A/C RELEASED FROM PLT DEFERRAL AND EA 900ER-33E4-27478. Aug 26, 2024 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2024050749490Lens · missingTHE LENS FOR THE EMERGENCY AISLE LIGHT AT ROW 4 IS MISSING. GROUNDED - YES. INSTALLED EMERGENCY AISLE LIGHT LENS COVER AT ROW 4 REF AMM 33-51-03.May 7, 2024 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2024041649131Rib · damagedTRAILING EDGE OF LOWER FLANGE ON HORIZONTAL STAB O/B CLOSURE RIB ON R/H SIDE HAS EVIDENCE OF HEAT DAMAGE. (LAST NUTPLATE AREA). GROUNDED - YES. ACCOMP HFEL PEV NDT 51-00-00 PROCEDURE 23 NO CRACKS NOTED. ACCOMP. CONDUCTIVITY CHECK PER BNDT PART LO. 51-00-00 PROApr 16, 2024 · N493AS · Boeing 737990ER · Horizontal Stabilizer, Spar/RibSDR ASAA2024012547527Power Supply · inoperativeEMERGENCY LIGHT POWER SUPPLY M1694 AND M1670 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLIES M1694 AND M1670 OPS CHECK GOOD REF AMM 33-51-06 2 CB'S PULLED, COLLARED AND RESET.Jan 25, 2024 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2024012547525Lamp · inoperativeR2 DOOR EXTERIOR EMERGENCY LIGHT INOP. GROUNDED - YES. REPLAMPED R2 DOOR EXTERIOR EMERGENCY LIGHT REF AMM 33-51-04 OPS GOOD.Jan 25, 2024 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2023110145971Blade · wornFOUND EXCESSIVE WEAR / DAMAGE ON MULTIPLE FAN BLADE PLATFORMS ON #1 ENGINE. GROUNDED - YES. REF W/O 1969863REF T/C SBCFM56-7B-72-1033-1. REMOVED AND REPLACED ALL FRAN BLADE PLATFORMS DURING FAN LUBE T/C ON #1 ENGINE. PERFORMED ENGINE POWER RUN TEST #7 REF AMM Nov 1, 2023 · N493AS · Boeing 737990ER · Turbine Engine Air Inlet SectionSDR ASAA2023103145942Modulating Valve · faultyRIGHT PACK LIGHT ILLUMINATED. EXTINGUISHES WHEN CLEARING MASTER CAUTION. GROUNDED - YES. (RESOLVED ON W/O: 1969863 TASKCARD: N/R-00006 ) PERFORMED PACK TEMPCONTROL BITEREF FIM 21-62 TASK 801FOUND P2TC THIS PACK TCV FAULT. TROUBLESHOT REF FIM 21-62 TASK 831REPLOct 31, 2023 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023102345816Unknown · unknownFOUND 4 ECONOMIC FAULTS ON #2 ENG HPTACC SIGNALS RECORDED FAULTS: 75-10462, 75-20412, 75-10412, 75-10362. GROUNDED - YES. ON DEFERRAL.Oct 23, 2023 · N493AS · Boeing 737990ER · Engine Cooling SystemSDR ASAA2023101645679Unknown · unknownRIGHT "RAM DOOR FULL OPEN" LIGHT WAS ILLUMINATED THE ENTIRE FLIGHT. PACKS, A/C, PRESSURIZATION ALL NORMAL. GROUNDED - YES. PERFORMED B737-900 FIM 21-51 TASK 803. NO FAULTS FOUND, OPS CHECK NORMAL. DETERMINED TO BE INTERMITTENT FAULT. AIRPLANE RETURNED TO NORMAOct 16, 2023 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023092345250Unknown · unknownDURING TC 78273000 FOUND ECONOMIC FAULT 75-10242 AND 75-20412 HPTACC SIGNAL DISAGREE. GROUNDED - YES. ON DEFERRAL.Sep 23, 2023 · N493AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023092345246Unknown · unknownDURING TC 7827300 FOUND ECONOMIC FAULT 75-10462 AND 75-20462 HPTACC DEMAND AND POSITION SIGNALS DISAGREE. GROUNDED - YES. ON DEFERRAL.Sep 23, 2023 · N493AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023092345245Unknown · unknownDURING TC 78273000 FOUND ECONOMIC FAULT 75-10362 HPTACC POSITION OUT OF RANGE. GROUNDED - YES. ON DEFERRAL.Sep 23, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air SystemSDR ASAA2023091945222Unknown · unknownDURING PERFORMING T/C 78273000 FOUND ENG #1 MSG BR: 73-10191 INTERVAL EEC FAULT, LONG TIME. GROUNDED - YES. ON DEFERRAL.Sep 19, 2023 · N493AS · Boeing 737990ER · Engine Fuel and ControlSDR ASAA2023082344750Unknown · unknownLT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. PERFORMED #1 ZONE PACK TEMP CONTROLLER BITE REF AMM 21-61-00. NO FAULTS FOUND, APPEARS TO BE AN INTERMITTENT FAULT. NO HISTORY FOR 30 DAYS. THIS CLEARS MEL 21-32B. C/N 2303349 REMOVED. SEAMC PETER NOTIFIED.Aug 23, 2023 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023082344718Control Valve · faultedTECH SERVICES REQUEST REPLACEMENT OF THE #1(LEFT)V18 FLOW CONTROL VALVE DUE TO REPORT LEFT PACK CYCLING FROM HIGH TO LOW FLOW. GROUNDED - YES. REMOVED AND REPLACED LEFT FLOW CONTROL AND SHUTOFF VALVE REF B737-900 AMM 21-51-01 OPS CHECK NORMAL.Aug 23, 2023 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023081644640Unknown · unknownWHILE ACCOMPLISHING T/C 78273000 FAULT CODE APPEARED ON #2 ENGINE 75-20462 THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HR PLT. GROUNDED - YES. ON DEFERRAL.Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air SystemSDR ASAA2023081644639Unknown · unknownWHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-10462 APPEARED ON #2 ENGINE. THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE, ECONOMIC FAULT MUST BE CORRECTED IN 500 HRS. GROUNDED - YES. ON DEFERRAL.Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Cooling SystemSDR ASAA2023081644638Unknown · unknownWHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-10362 APPEARED ON #2 ENGINE, THE HPTACC POSITION SIGNAL IS OUT OF RANGE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HOURS. GROUNDED - YES. ON DEFERRAL.Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air SystemSDR ASAA2023081644637Unknown · unknownWHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-30412 APPEARED ON #2 ENGINE, THE HPTACC POSITION SIGNAL DISAGREE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HOURS. GROUNDED - YES. ON DEFERRAL.Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air SystemSDR ASAA2023080244382Power Supply · failedEMERGENCY LIGHT SYSTEM BATTERY PACK M2627 FAILED OPERATIONAL CHECK. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY POWER SUPPLY M2627 IAW B737 AMM 33-51-06. OP CHECKS GOOD.Aug 2, 2023 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2023071744076Unknown · unknownFMC DISAGREE DURING PUSHBACK. GROUNDED - YES. MESSAGE CLEARED WITHOUT USE OF THE QRH.Jul 17, 2023 · N493AS · Boeing 737990ER · Flight Management Computing Hardware SystemSDR ASAA2023062843815Unknown · unknown#2 ENG FAULT CODE 75-10462 THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE ECO FAULT. GROUNDED - YES. ON DEFERRAL.Jun 28, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air SystemSDR ASAA2023062543754Actuator · faultyRIGHT RAM DOOR (BLUE) LIGHT ILLUMINATED IN CRZ. GROUNDED - YES. REVERSED MEL CONFIG FOR MEL 21-5D. AFT RAM AIR LOUVERS AND INLET ACTUATOR BACK TO NORMAL CONFIG. 5 CB PULLED, COLLARED, AND RESET. SRADA LINK AND BOLT, NUT, AND COTTER PIN STOWED IN MAIN E/E FLY AJun 25, 2023 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023062243695Unknown · unknown# 2 ENG FAULT CODE 75-20462, THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE. ECO FAULT. # 2 ENG FAULT CODE 75-30412. THE HPTACC POSITION SIGNALS DISAGREE. ECO FAULT. # 2 ENG FAULT CODE 75-10362. THE HPTACC POSITON SIGNAL IS OUT OF RANGE. ECO FAULT. PERFORMED Jun 22, 2023 · N493AS · Boeing 737990ER · Compressor Bleed ControlSDR ASAA2023061543573Unknown · unknownSATCOM PROMPT WAS MISSING ON THE MCDU MENU GROUNDED - YES. QRH RESET PROCEDURE WAS SUCCESSFUL.Jun 14, 2023 · N493AS · Boeing 737990ER · Communications SystemSDR ASAA2023052443343Spinner · wornENGINE #2 SPINNER CONE WORN. GROUNDED - YES. REPLACED ENGINE SPINNER REF ASA TASK CARD 78472010.May 24, 2023 · N493AS · Boeing 737990ER · Turbine Engine Air Inlet SectionSDR ASAA2023042943047Unknown · unknownINFLIGHT SATCOM LOCK-UP. GROUNDED - YES. QRH PROCEDURE PERFORMED. SATCOM RESTORED.Apr 29, 2023 · N493AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023041742911Unknown · unknownSATCOM LOCKUP. GROUNDED - YES. QRH COMPLETED SUCCESSFULLY.Apr 17, 2023 · N493AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023022442083Unknown · unknownPREDICTIVE WINDSHEAR ALERT FAIL (PWS FAIL) DURING TAKE OFF ROLL. RADAR WORKED GOOD IN CRUISE. GROUNDED - YES. ACCOMP B737-900 FIM 34-43 TASKS 815 & 801, SYS OPS CKS NML PER SAME. GROUND VERIFICATION SUCCESSFUL.Feb 24, 2023 · N493AS · Boeing 737990ER · Independent Position Determining SystemSDR ASAA2023011041957Lever · faultyENGINE 1 LONG TIME FAULT MSG # 73-10191 INTERNAL EEC FAULT. GROUNDED - YES. REPLACED #1 ENGINE START LEVER REF B737-900 AMM 76-11-02.Jan 10, 2023 · N493AS · Boeing 737990ER · Engine ControlsSDR ASAA2023010951435Warning Light · false activationCONT CABIN ZONE TEMP LIGHT ILLUMINATED DURING MASTER CAUTION RECALL. GROUNDED - YES. REF B737-900 FIM 21-62 TASK 848 NO FAULTS DETECTED AT THIS TIME.Jan 5, 2023 · N493AS · Boeing 737990ER · Cabin Temperature Control SystemSDR ASAA2023010541442Anti-Ice Valve · stuckON DESCENT IN TO SEATTLE, THE LEFT COWL VALVE GOT STUCK CLOSED. WHEN WE TRIED LATER, THE VALVE WORKED AS IT IS SUPPOSED TO. GROUNDED - YES. REMOVED AND REPLACED #1 INLET COWL TAI VALVE ASSY REF B737-900 AMM 30-21-11.Jan 5, 2023 · N493AS · Boeing 737990ER · Engine Anti-Icing SystemSDR ASAA2022123141330Satcom · lockedSATCOM LOCK UP GROUNDED - YES. SATCOM DISPLAY RE-ESTABLISHED VIA QRH.Dec 31, 2022 · N493AS · Boeing 737990ER · Communications SystemSDR ASAA2022121841200Modulating Valve · failedLEFT PACK LIGHT COMES ON WITH RECALL. IT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, NR 1 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL TCV 1 (V139). REMOVED & REPLACED IAW AMM 21-51-10.Dec 18, 2022 · N493AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2022121941150Modulating Valve · failedCONT CAB ZONE TEMP ON RECALL. GOES OUT WITH RESET. GROUNDED - YES. CONFIRMED FAULT, NR 2 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL "FLIGHT DECK" TCV (V143). REMOVED & REPLACED SAME REF B737-900 AMM 21-61-21. ORIG SUBMISSION DATE: 12/19/2022Dec 14, 2022 · N493AS · Boeing 737990ER · Cabin Temperature Control SystemSDR ASAA2022121041092Anti-Ice Valve · inoperative#1 ENGINE ANTI-ICE VALVE DOES NOT ACTUATE WITH THRUST AT IDLE. THRUST NEEDS TO BE INCREASED TO GET VALVE TO MOVE. GROUNDED - YES. PERFORMED ENG#1 IDLE RUN PER B737-900 AMM 71-00-00/501 NO FAULT PERFORMED B737-900 FIM 30-21 TASK 802 OPS CHECK OK.Dec 10, 2022 · N493AS · Boeing 737990ER · Air Intake Anti/De-Ice SystemSDR ASAA2022120141002Warning Message · false activationZONE TEMP CONT CAB. RESET WITH RECALL. GROUNDED - YES. ON FIRST BITE ATTEMPT, "FLT DECK TRIM VALVE" LIGHT ILLUMINATED ON "BIT" STEP AND "PREV FLT" STEP, BUT EXTINGUISHED ON "VERIFY" STEP. 2ND ATTEMPT, "SRADA EXIT" LIGHT ILLUMINATED ON "VERIFY" STEP. CYCLED POWDec 1, 2022 · N493AS · Boeing 737990ER · Cabin Temperature Control SystemSDR ASAA2022112940977Access Door · leakingRH WING CENTER TANK PANEL 631BB ACCESS DOOR (6), HAS A SMALL FUEL LEAK. GROUNDED - YES. RETORQUED RH CENTER FUEL TANK PANEL LWR 631BB ACCESS DOOR (6) IN REF TO B737-900 AMM 28-11-31. NO LEAKS NOTED. OK FOR SERVICE.Nov 29, 2022 · N493AS · Boeing 737990ER · Fuel StorageSDR ASAA2022112840978Gasket · leakingRH WING FUEL PANEL 632KB SMALL FUEL LEAK. GROUNDED - YES. REMOVED PANEL #632KB ON RH WING. REPLACED GASKET & REINSTALLED RH WING LOWER FUEL 632KB IN REF TO B737-900 AMM 28-11-11-400-801, TRANSFER FUEL BACK, SOAKED FOR A HOUR, NO LEAKS NOTED. OK FOR SERVICE.Nov 28, 2022 · N493AS · Boeing 737990ER · Wing Main, Frame StructureSDR ASAA2022112040857Battery Pack · dischargedDURING ACCOMPLISHMENT OF ASA T/C 78233008 OPS CHECK OF EMERGENCY LIGHTS AISLE EMERGENCY LIGHT AT SEAT ROW 27ABC IS INOP. GROUNDED - YES. VERIFIED- INSTALLED NEW EMERGENCY LT ASSY - NO HELP. REF B737-900 MM 33-51-06, REMOVED/ & REPLACED M2626 POWER SUPPLY/BATT Nov 20, 2022 · N493AS · Boeing 737990ER · Emergency LightingSDR ASAA2022110640657Outflow Valve · leakingASA TECH SERVICE REQUEST. FOLLOW UP TO CONTINUING REPORTS OF SQUEALING NOISE IN AFT GALLEY BY R-2 DOOR. GROUNDED - YES. REMOVED AND REPLACED OUTFLOW VALVE WITH NEWER STYLE REF B737-900 AMM 21-31-03.Nov 6, 2022 · N493AS · Boeing 737990ER · Pressure Regulator/Outflow ValveSDR ASAA2022110540650Warning Light · false activationWITH ENGINE ANTI-ICE ON L/H ENG ANTI-ICE COWL VALVE OPEN LIGHT REMAINS BRIGHT BLUE AND L/H TAI AMBER LIGHT ILLUMINATES. GROUNDED - YES. PERFORMED B737-900 FIM 30-21 TASK 804. LEFT ENGINE COWL LIGHTS EXTINGUISHED. PRESSURIZED PNEUMATIC SYSTEM USING APU BLEED AINov 5, 2022 · N493AS · Boeing 737990ER · Engine Anti-Icing SystemSDR ASAA2022110440627Outflow Valve · leakingFLIGHT ATTENDANTS REPORT LOUD SQUEALING SOUND ENROUTE AT ALTITUDE. PRESSURIZATION NORMAL. SQUEAL DIMINISHED @ 4 PSI DIFFERENTIAL. GROUNDED - YES. REMOVED AND REPLACED OUTFLOW VALVE WITH NEWER STYLE REF B737-900 AMM 21-31-03.Nov 4, 2022 · N493AS · Boeing 737990ER · Pressure Regulator/Outflow Valve
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