N474AS

Service difficulty reports · 244

Newest first, from October 11, 2006, when the mark’s previous registration was cancelled.

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 = 'N474AS' AND difficulty_date > DATE '2006-10-11'
  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 ASAA2026092068844Power Supply · inoperativeEMERGENCY LIGHTS AT ROW 9 DEF AND 13 DEF NOT ILLUMINATED. GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERG LIGHTS POWER SUPPLY AND BATTERY PACK S/N 122749 ROW 7 DEF, OP CHECKS GOOD. IAW B737-900 AMM 33-51-06-960-805 STEP 4. E. 5, & 6.D AND 33-51-06-960-Sep 20, 2026 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2026081568666Support · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT LBL 20 STA 947 TO 967 CORRODED. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INTERCOSTAL IAW BOEING 737-900ER SAug 15, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026081468793Floorbeam · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND CORROSION ON BS 947 FLOORBEAM UPPER CAP AT ALL 4 LAV MOUNT FITTING LOCATIONS. GROUNDED - YES. REPAIRED FLOORBEAM 947.5 LBL-59-RBL-59 IAW SRM 53-70-51-2R-5 REPAIR 5, EA 900ER-53EA-30665.Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage Main, Floor BeamSDR ASAA2026081468792Sill Drain · corrodedR2 MOPSILL HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. REMOVED & REPLACED R2 MOP SILL CHORD IAW BOEING SRM 51-40-02.Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage Main, StructureSDR ASAA2026081468665Mount · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT RBL 20 BETWEEN STA 947 AND 967 TO BE CORRODED WHERE MOUNT SITS. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INAug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach FittingsSDR ASAA2026081468664Mount · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND INTERCOSTAL RBL50 BETWEEN STA 927 AND 947 TO BE CORRODED WHERE MOUNT SITS. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INTAug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach FittingsSDR ASAA2026081468663Mount · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT LBL 50 BETWEEN BS 947 & 967 TO BE CORRODED WHERE MOUNT ATTACHES. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT IAug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach FittingsSDR ASAA2026081468609Mount · corrodedUPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT RBL50 BETWEEN STA 947 AND 967 TO BE CORRODED WHERE MOUNT ATTACHES. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1 REMOVED & REPLACED LAV MOUNT SUPPORT Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach FittingsSDR ASAA2026081368735Attach Angle · corrodedAFT PIT FWD SHIELD ATTACH ANGLES 2 EA ARE CORRODED. GROUNDED - YES. REMOVED & REPLACED 2 EA AFT PIT FWD SHIELD ATTACH ANGLES IAW SRM 51-40-02-0G-0 STEP 4, 5, 7.Aug 13, 2026 · N474AS · Boeing 737990ER · Fuselage Main, Attach FittingsSDR ASAA2026080568790Transition Panel · corrodedAFT CARGO PIT RT TRANSITION HAS MULTIPLE SPOTS OF CORROSION AT BS 727-767. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS, REPAIRED RT TRANSITION FROM STA 727-767 IAW SRM 53-00-53-2R-5.Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026080568736Transition Panel · corrodedFWD CARGO PIT LEFT TRANSITION AT STA 500 TO 500L HAS CORROSION. GROUNDED - YES. REPAIRED FWD CARGO PIT RT TRANSITION STA 500H+9 TO 500L IAW SRM 53-00-53-2R-5, REMOVED DAMAGE AT STA 500 TO 500H FOUND TO BE WITH IN LIMITS IAW SRM 53-00-53-1A-2.Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026080568718Transition Panel · corrodedAFT CARGO BAY, LT TRANSITION HAS MULTIPLE SPOTS OF CORROSION AT BS 727 - 847. GROUNDED - YES. REMOVED CORROSION, FOUND OUT OF LIMITS, REPAIRED IAW SRM 53-00-53-2R-5 W= 1.5" O= 0040:. R= 0.032" L= 2" D= 0.008.Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026080568607Baffle · crackedFWD CARGO PIT LT AT BS 500K FWD SIDE BAFFLE CLIP CRACKED. GROUNDED - YES. REMOVED AND INSTALLED NEW CILP ON FWD CARGO COMPT LH SIDE STA 500K IAW B737-900 SRM 51-40-02-0G-0.Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026080568498Transition Panel · corrodedFWD CARGO PIT RT TRANSITION AT STA 500E TO 500L HAS CORROSION. GROUNDED - YES. REPAIRED FWD CARGO PIT RT TRANSITION BS 500+9 TO 500L IAW B737-900ER SRM 53-00-53-2R-5.Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2026080568336Shield · corrodedAFT CARGO FWD SHIELD HAS CORROSION. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING SRM 53-60-15-1A-1 STEP 4G(2), REMOVED & REPLACED SHIELD IAW SRM 51-40-02-0G-0 STEP 4,Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025080559947Brake Pads · damagedON TAKEOFF ROLL EXTREMELY STRONG VIBRATION FELT AT APPROX 60 KNOTS, TAKEOFF ABORTED. GROUNDED - YES. INSPECTED ALL 4 ANTI-SKID TRANSDUCERS, NO DEFECT NOTED. ACCOMP TRANSDUCER OPS TEST IAW AMM 32-42-00. ALL 4 GEAR TESTS PASSED. FOUND DAMAGE TO NR 1 BRAKE ON Aug 5, 2025 · N474AS · Boeing 737990ER · Landing Gear Brake SystemSDR ASAA2024100153408Battery · inoperativeFLIGHT DECK EMERGENCY DOME LIGHT INOP GROUNDED - YES. REPLACED EMERGENCY WITH SERVICEABLE LIGHTS BATTERY AND FUSE. OP CHECKS GOOD IAW B737-900 AMM 33-51-06-960-804Oct 1, 2024 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2024093052909Power Supply · inoperativeEMERGENCY LIGHT ABOVE BIN AT ROW 27CBA DOES NOT WORK. GROUNDED - YES. REMOVED & REPLACED EMERGENCY LIGHT BATTERY PACK IAW B737-900 AMM 33-51-06-960-805 OPS CK GOOD. (S/N 402955)Sep 30, 2024 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2024091052648Transition Panel · corrodedFWD CARGO R/H TRANSITION STA 500D TO 500I HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED DAMAGE WITH SURFACE BLEND FOUND TO BE OUT OF LIMITS AND REPAIRED R/H TRANSITION IAW B737-900ER SRM 53-00-53-2R-5W 1 O .040 R .020 L 1 D .020.Sep 10, 2024 · N474AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024090553403Battery · inoperativeEXIT ROW LIGHTS AT ROW, 25 AND 29 INOP. (FCF INDUCTION FLIGHT DISCREPANCY ITEM #15) GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERGENCY BATTERY, OPS CK GOOD IAW B737-900 AMM 33-51-06-960-805. (S/N 403945)Sep 5, 2024 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2024062850659Battery Pack · dischargedR1 AND RH AFT CABIN EMERGENCY LIGHTS NEEDS FULL CHARGE AND OPS CHECK AFTER 90 MINUTES. GROUNDED - YES. PERFORMED OPS CHECK OF THE R1 DOOR EMERGENCY LIGHTS AND THE AFT CABIN EMER. LIGHTS PER AMM 33-51-00. OPS CHECK GOOD. NO DEFECTS NOTED AT THIS TIME.Jun 28, 2024 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2024062850658Charger · failedLH OVERDOOR EXIT SIGN NOT TURN ON DURING EMERGENCY LIGHTS OPERATIONAL CHECK TASK CARD 78233008. ALSO LH FWD MID AND LH AFT MID CABIN EMERGENCY LIGHT DO NOT TURN ON. GROUNDED - YES. REPLACED LH MID OVERWING POWER SUPPLY (CHARGER ASSY) AND BATTERY PACK IAW 33-51Jun 28, 2024 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2024030848328Filter · contaminatedCLIMBING THROUGH 6000' FA'S CALLED TO REPORT FUMES ON CABIN AND FEELING LIGHT HEADACHE. FO SAID HE NOTICED ODOR CLIMBING THROUGH 3000' FOR ABOUT 15 SECONDS THAT QUICKLY DISSIPATED. A/C HAD BEEN DEICED AT GATE PRIOR TO CREW ARRIVAL. FO NOTED PUDDLE OF DEICE FLUMar 8, 2024 · N474AS · Boeing 737990ER · Air Distribution SystemSDR ASAA2023121746793Battery Pack · no testPERFORMING T/C 78233001, FOUND AFT GALLEY L/H OVHD EMERGENCY BATT PACK (M1673) + AFT GALLEY R/H OVHD EMERGENCY BATT PACK (M1672) FAILED BATT CAPACITY CHECK. GROUNDED - YES. REMOVED + REPLACED R/H OVHD EMERGENCY LIGHT BATTERY PACK + L/H OVHD EMERGECNY LIGHT BATDec 17, 2023 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2023103045928Unknown · unknownWHILE PERFORMING TASK CARD 78273000, FOUND FAULT CODE 77-20871 THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE. ECONOMIC FAULT #1 ENG. GROUNDED - YES. ON DEFERRAL.Oct 30, 2023 · N474AS · Boeing 737990ER · Engine Temperature Indicating SystemSDR ASAA2023102845894Unknown · unknownSAT COMM MISSING ON MCDU MENU PAGE. GROUNDED - YES. RESET PER QRH SATCOM LOCK UP PROCEDURE SUCCESSFULLY.Oct 28, 2023 · N474AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023101645704Unknown · unknownSAT RESET PERFORMED GROUNDED - YES. SAT RESET SUCCESSFUL.Oct 16, 2023 · N474AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023100445433Control Panel · malfunctionedMCP SPEED WINDOW HAD A FEW WHITE DOTS DISPLAYED. GROUNDED - YES. (RESOLVED ON W/O: 1971086 TASKCARD: N/R-00002 ) REMOVED & REPLACED DFCS MCP REF AMM 22-11-34-400-801, OPS CK NML REF AMM 22-11-34/501 (GP 32), LAND VERIFY TEST (GP 49) REF AMM 22-11-00/201 & HGS Oct 4, 2023 · N474AS · Boeing 737990ER · Auto Flight SystemSDR ASAA2023100145405Unknown · unknownLOST SAT ON THE MCDU MENU PAGE. GROUNDED - YES. PERFORMED SATCOM LOCK-UP QRH TO RESTORE SAT ON THE MCDU MENU PAGE. VERIFIED SATCOM IS NOT IN THE LOCK-UP STATE REF FIM 23-15 TASK 801. SATCOM LINK TEST SUCCESSFUL REF AMM 23-15-00/501.Oct 1, 2023 · N474AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023092745346Unknown · unknownPWS FAIL FLAG ON ND AFTER PASSING 80 KTS ON T/O ROLL IT DISAPPEARED AROUND 1000 AGL, DID NOT ILLUMINATE AGAIN DURING FLIGHT. GROUNDED - YES. PERFORMED WEATHER RADAR SYSTEM BITE TEST IAW AMM 34-43 TASK 801. SYSTEM TEST SATIS. OK FOR SERVICE.Sep 27, 2023 · N474AS · Boeing 737990ER · Weather Radar SystemSDR ASAA2023091845208Packing · leakingOIL CAP ORING LEAKING ON #2 ENG. GROUNDED - YES. REMOVED AND REPLACED #2 ENG OIL CAP ORING REF AMM 79-11-01-300-801 F00. NO LEAKS NOTED AT THIS TIME.Sep 18, 2023 · N474AS · Boeing 737990ER · Turbine Engine Oil SystemSDR ASAA2023091545155Unknown · unknownENG #1 LOOP A INOP. GROUNDED - YES. ON DEFERRAL.Sep 15, 2023 · N474AS · Boeing 737990ER · Fire DetectionSDR ASAA2023091145056Unknown · unknown#2 ENG FIRE LOOP B SHOWS FAULT DURING TEST, A LOOP TESTS FINE. GROUNDED - YES. ON DEFERRAL.Sep 11, 2023 · N474AS · Boeing 737990ER · Detection SystemSDR ASAA2023090744993Unknown · unknownWHIE ACCOMPLISHING T/C 78273000 FOUND #1 ENGINE FAULT CODE 77-20871 THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE ECONOMIC FAULT. GROUNDED - YES. NO RECENT FAULTS PER T/C 78273000THIS CLEARS PLT 60647194 AND PLT 60647193SEAMC PETER NOTIFIED.Sep 7, 2023 · N474AS · Boeing 737990ER · Engine Indicating SystemSDR ASAA2023083044849Lens · missingWHILE PERFORMING T/C 78233008 FOUND MID CABIN CEILING EMERGENCY LIGHT MISSING LENS. GROUNDED - YES. REPLACED LENS PER MM 33-51-03-960-803, OPS GOOD. CLEARS MEL 33-15D, REMOVED PLACARD C/N #30017474. JOE SEAMC NOTIFIED.Aug 30, 2023 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2023072944295Unknown · unknownSATCOM LOCKUP GROUNDED - YES. QRH PROCEDURE PERFORMED. NORMAL OPS RESTORED.Jul 29, 2023 · N474AS · Boeing 737990ER · Communications SystemSDR ASAA2023071844122Power Supply · inoperativeEMERGENCY EXIT SIGN LIGHT OUT CENTER AISLE. GROUNDED - YES. REPLACED CENTER AISLE EMERGENCY EXIT LIGHT ASSY PER AMM 33-51-01. OPS CHK FAILED BLONG 07/19/2023 REMOVED AND REPLACED POWER SUPPLY M1695 REF AMM 33-51-06-960-806. 1 C/B OPENED, TAGGED, AND RESET. ALLJul 18, 2023 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2023062743757Unknown · unknownREF T/C N8420001 ENGINE FIRE DETECTORS/HARNESS INSPECTION, FOUND MW0326 CORE FIRE DETECTION HARNESS BRAIDED COVER GROUNDING BRAID BROKEN/MISSING AT RIGHT CORE FIRE DETECTOR "B" LOOP TERMINAL. GROUNDED - YES. ON DEFERRAL.Jun 27, 2023 · N474AS · Boeing 737990ER · Detection SystemSDR ASAA2023060543469Spacer · worn#2 ENGINE SPACERS WORN BEYOND LIMITS 14. GROUNDED - YES. REPLACED 14 ENGINE SPACERS IAW ASA TC 78472010.Jun 5, 2023 · N474AS · Boeing 737990ER · Turbine Engine Air Inlet SectionSDR ASAA2023060543468Spinner · worn#2 ENGINE CONE PAINT WORN TO LIMITS. GROUNDED - YES. REPLACED #2 ENGINE CONE IAW ASA TC 78472010.Jun 5, 2023 · N474AS · Boeing 737990ER · Turbine Engine Air Inlet SectionSDR ASAA2023060543465Power Supply · inoperativeDURING EMERGENCY LIGHTS OPS TEST ASA TASK CARD 78233008 4 LIGHTS DID NOT ILLUMINATE COCKPIT DOME LIGHT, FWD ENTRY DOOR OVERHEAD LIGHT ESCAPE SLIDE, AND FLOOR L1 DOOR. GROUNDED - YES. REMOVED AND REPLACED FWD ENTRY EMERGENCY LIGHTS POWER SUPPLY M1675 REF B737-9Jun 5, 2023 · N474AS · Boeing 737990ER · Emergency LightingSDR ASAA2023051243216Unknown · unknownSATCOM LOCKOUT PROCEDURE USED. GROUNDED - YES. SATCOM RESTORED SUCCESSFULLY.May 12, 2023 · N474AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023042442985Lubrication Unit · faultyAPU FAILED THREE START ATTEMPTS AT FL350 WITH FAULT LIGHT THAT REMAINED ILLUMINATED. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 49-40 TASK 801 STEPS F AND H(1). REPLACED APU LUBE MODULE PER B737-900 AMM 49-91-11. INSTALLATION TEST PASSED. NO LEAKS.Apr 24, 2023 · N474AS · Boeing 737990ER · APU Oil SystemSDR ASAA2023041942953Unknown · unknownFMC STUCK IN BITE MODE. GROUNDED - YES. VERIFIED FAULT FMC CDU STUCK IN APU BITE. CYCLED C/B P6-4 F12. FMC CDU WENT TO NML. ACCOMP. APU FMC BITE NO APU FAULTS & FMC NML OPS. ACCOMP. APU STARTING & OPERATION TEST, TEST PASS REF. B737-900 AMM 49-61-00-700-801, &Apr 19, 2023 · N474AS · Boeing 737990ER · Flight Management Computing Hardware SystemSDR ASAA2023040742761Unknown · unknownHDG SEL LIGHT ON MCP WILL NOT ILLUMINATE. GROUNDED - YES. CLEANED CONTACTS, LIGHT OPS CKS NML.Apr 7, 2023 · N474AS · Boeing 737990ER · Autopilot SystemSDR ASAA2023040442793Actuator · leakingDURING ENGINE RUN, FOUND LEAK COMING FROM R VSV DRAIN ON #1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE RIGHT HAND VSV ACTUATOR REF B737-900 AMM 75-31-01.Apr 4, 2023 · N474AS · Boeing 737990ER · Compressor Bleed ControlSDR ASAA2023040442738Pressure Switch · warning lightPER ASA T/C 78273000 LONG TIME FAULT ON ENGINE # 1 THE FUEL FILTER SIGNALS DISAGREE. MSG # 73-31071. GROUNDED - YES. REPLACED FUEL PRESSURE DIFFERENTIAL SWITCH REF B737-900 AMM 73-34-01.Apr 4, 2023 · N474AS · Boeing 737990ER · Engine Fuel Indicating SystemSDR ASAA2023040342719Pressure Switch · unknownAFTER TAXIING CLEAR OF THE RUNWAY, THE FILTER BYPASS ON THE #1 ENGINE OF THE FUEL PANEL LIGHT CAME ON. WE SHUT DOWN THE ENGINE AND TAXIIED IN NORMALLY. GROUNDED - YES. RUN ENGINE REF. AMM 71-00-00 & FILTER BYPASS LIGHT DID NOT CAME ON. FOUND MX MESSAGE 73-3107Apr 3, 2023 · N474AS · Boeing 737990ER · Engine Fuel Indicating SystemSDR ASAA2023032342496Unknown · unknownFUEL QTY 2 CIRCUIT BREAKER POPPED. GROUNDED - YES. RESET C/B AND PERFORMED FQIS BITE TEST PROCEDURES PER B737-900 FIM 28-41 TASK 801. NO DEFECTS NOTED.Mar 23, 2023 · N474AS · Boeing 737990ER · Fuel Indicating SystemSDR ASAA2023030642231Unknown · unknownSATCOM LOCK-UP. GROUNDED - YES. ACCOMPLISHED SATCOM RESET PROCEDURE PER QRH SUCCESSFUL.Mar 6, 2023 · N474AS · Boeing 737990ER · HF Communications System
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