N471AS

Service difficulty reports · 245

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 = 'N471AS' 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 ASAA2026021964499Pin · shearedFA REPORTS L1 DOOR NOT OPENING PROPERLY DOOR DOESNT OPEN ALL THE WAY. GROUNDED - YES. UPON L1 DOOR INSPECTION FOUND L1 DOOR TOP GUIDE ARM PIN BOTTOM SECURING SCREW HEAD SHEARED OFF CAUSING DOOR OPS ISSUE. R & R PIN ASSEMBLY IAW AMM 52-11-21 DOOR OPS CHKD GOODFeb 19, 2026 · N471AS · Boeing 737990ER · Passenger/Crew DoorsSDR ASAA2025101761712Bulb · inoperativeINTERIOR EMERGENCY LIGHTS BULBS INOP ROW 16 A, B, C , AND NEAR LAV E. GROUNDED - YES. RELAMPED EMERGENCY LIGHTS AT ROW 16 ABC AND NEAR LAV E REF B737 AMM 33-51-01. OPS CHECK GOOD.Oct 17, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100461414Fuse · inoperativeEMERGENCY AISLE LIGHTS AT SEAT ROW 17 & 19 FED INOP. GROUNDED - YES. REPLACED TWO EACH FUSES IN BATTERY PACK M1671 REF B737NG AMM 33-51-06-960-804. AISLE LIGHTS AT SEAT ROW 17 AND 19 FED OPS CHECK GOOD REF B737NG AMM 33-51-06-960-804.P.O. 1125797.1.Oct 4, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100461410Bulb · inoperativeEXTERNAL RIGHT EMERGENCY LOWER FUSELAGE SLIDE LIGHT INOP. GROUNDED - YES. REPLACED BULB IN EXTERNAL RIGHT EMERGENCY LOWER FUSELAGE SLIDE LIGHT, NO LONGER INOP REF. B737-600/700/800/900 AMM 33-51-04.Oct 4, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100461409Fuse · inoperativeEMERENCY EXIT LIGHT AT THE BOTTOM OF AFT RIGHT OVERWING DOOR INOP. GROUNDED - YES. REPLACED FUSES IN BATTERY PACK M1671 ON N/R 30983, EMERGENCY EXIT LIGHT PASSES OPS CHECK REF B737 NG AMM 33-51-06-960-804. (S/N 118163)Oct 4, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100261413Battery Pack · inoperativeEMERGENCY EXTERIOR R/H OVERWING EXIT LIGHTS INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1671 IAW B737 AMM 33-51-06-960-806 OPERATIONAL TEST GOOD. (S/N 118163)Oct 2, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100261412Battery Pack · inoperativeEMERGENCY R/H OVERWING EXIT LIGHTS INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1695 IAW B737 AMM 33-51-06-960-806. OPERATIONAL GOOD. (S/N 118800)Oct 2, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025100261408Power Supply · inoperativeEMERGENCY AISLE LIGHT AT ROW 9 INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1676 IAW AMM 33-51-06-960-806 OPERATIONAL TEST GOOD. (S/N 117742)Oct 2, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025091260935Floorbeam · corrodedAFT WET AREA, AT STA.986.5 AND RBL.43 UPPER CHORD OF FLOOR BEAM HAS A CORRODED FASTENER HOLE. GROUNDED - YES. REMOVED DAMAGE IAW B737-900ER SRM 53-70-51-2R-6 PERFORMED HFEC CUT AND MAT. ID, ROTO PEEN, HEAT TREATED, FABRICATED, APPLIED PROTECTIVE TREATMENT AND Sep 12, 2025 · N471AS · Boeing 737990ER · Fuselage Main, Floor BeamSDR ASAA2025090961429Shield · corrodedFWD CARGO FWD SHIELD HAS CORROSION ON LOWER SIDE. GROUNDED - YES. REMOVED CORROSION, ORIGINAL THICKNESS .032, MAT LOSS .005, REMAINING THICKNESS .027. AREA OUT OF LIMITS PER B737-900ER SRM 53-30-15-01-1 AND SRM 53-30-15-1A-1. REMOVED DAMAGED PART AND INSTALLEDSep 9, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025090960937Angle · corrodedAFTER REMOVAL OF CORRODED SHIELD, L-ANGLE P#146A8125-53 WAS FOUND TO BE CORRODED BEYOND LIMITS. ALL WORK COMPLETED ON CUSTOMER CARD G2211728. GROUNDED - YES. ALL WORK ACCOMPLISHED ON CUSTOMER CARD # G2211728.Sep 9, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025090960936Web · corrodedAFTER REMOVAL OF CORRODED SHIELD, WEB P#146A8123-18 WAS FOUND TO BE CORRODED OUT OF LIMITS. ALL WORK COMPLETED ON NR 30728. GROUNDED - YES. ALL WORK ACCOMPLISHED ON CUSTOMER CARD #G2211728(COPY ATTACHED) THIS NR IS FOR TRACKING PURPOSES ONLY.Sep 9, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025090461415Stub Beam · gougedR-2 DOOR, HANDLE BOX CUTOUT, LOWER TORQUE TUBE BEARING AREA IS GOUGED. GROUNDED - YES. REMOVED DAMAGED STUB BEAM REFERENCE B737-900 SRM 51-40-02, FABRICATED NEW STUB BEAM REFERENCE BAC DWG#147A6149 REV D, APPLIED CAA TO STUB BEAM BY OUTISDE VEDNOR IAW BAC5019,Sep 4, 2025 · N471AS · Boeing 737990ER · Service DoorsSDR ASAA2025090260958Pressure Plate · corrodedLEFT SIDE PRESSURE PLATE BETWEEN SS 986.3 AND 1006 HAS MULTIPLE AREAS OF CORROSION NEAR THE OTBD FITTING. . GROUNDED - YES. REMOVED AND REPLACED WITH NEW PRESSURE PLATE P/N 147A5116U19 PO:1132178.1 IAW B737-900 SRM 51-40-02 AND DWG. 147A5701. BLENDED AREA, ORSep 2, 2025 · N471AS · Boeing 737990ER · Fuselage Main, StructureSDR ASAA2025090260938Pressure Plate · corrodedRIGHT PRESSURE PLATE BETWEEN BS 986.3 & 1006 HAS MULTIPLE AREAS OF CORROSION NEAR FITTINGS AND FASTENER OPENINGS. . GROUNDED - YES. REMOVED AND REPLACED NEW PRESSURE PLATE IAW DWG. 147A5701.Sep 2, 2025 · N471AS · Boeing 737990ER · Fuselage Main, StructureSDR ASAA2025083061644Floor Panel · delaminatedIN FWD GALLEY, FLOOR PANEL 222CF (PN: 141A5810-767) HAS DELAMINATION. GROUNDED - YES. ACCOMPLSIHED PERMANENT REPAIR TO FWD GALLEY FLOOR PANEL 222CF PN:141A5810-767, IAW ASA B737-900 SRM 53-00-50-2R-1 + 53-00-50-2R-0.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083061643Floor Panel · delaminatedIN FWD GALLEY, FLOOR PANEL 222DF (PN: 141A5810-766) HAS DELAMINATION & SEVERAL AREAS OF CORROSION IN FASTNER HOLES. GROUNDED - YES. ACCOMPLISHED PERMANENT REPAIR TO FWD GALLEY FLOOR PANEL 222DF PN: 141A5810-766 IAW ASA B737-900 SRM 53-00-50-2R-1 + 53-00-50-2R-Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083061480Floor Panel · delaminatedMULTIPLE CORRODED FASTENERS AND AREAS OF DELAMINATION ON FLOORBOARD 242UF. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED INSERTS ON FLOORBAORD 242UF IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-212-0.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083061091Floor Panel · delaminatedIN FWD GALLEY, FLOOR PANEL HAS DELAMINATION & AN AREA OF CORROSION IN FASTENER HOLE. GROUNDED - YES. APPLIED PERMANENT REPAIRS TO DAMAGED AREAS OF FLOOR BOARD 141A5810-768 IAW SRM 53-00-50-2R-0, & SRM 53-00-50-2R-7.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083060956Floor Support · corrodedIN FWD GALLEY, 5 INCHES FWD OF STA 312, LBL 12, EVIDENCE OF CORROSION ON FLOOR STRUCTURE (MARKED IN RED) GROUNDED - YES. BLENDED AREA, ORIGINAL THICKNESS .180", MATERIAL REMOVED .069", REMAINING THICKNESS .111", FOUND TO BE OUT OF LIMITS IAW B737-900ER 53-10-Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025083060793Floor Panel · delaminatedMULTIPLE AREAS OF DELAMINATION AND MULTIPLE BROKEN FASTENERS ON FLOORBOARD P/N: 147A5810-445. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED INSERTS ON FLOORBOARD P/N: 147A5810-445 IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-2R-0.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083060790Floor Panel · delaminatedMULTIPLE CORRODED FASTNERS AND AREAS OF DELAMINATION ON FLOORDBOARD 241ABF P/N: 147A5810-439. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED FASTENERS ON FLOORBOARD 241AF P/N: 147A5810-439 IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-2R-0.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083060785Floorboard · delaminatedMULTIPLE CORRODED FASTNERS AND AREAS OF DELAMINATION ON FLOORBOARD 242TF. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED INSERTS ON FLOORBOARD 242TF IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-2R-0.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025083060782Floorboard · delaminatedMULTIPLE CORRODED FASTENERS AND AREAS OF DELAMINATION ON FLOORBOARD 241ADF P/N: 147A5810-443. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED INSERTS ON FLOORBOARD 241ADF P/N:147A5810-443 IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-2R-1.Aug 30, 2025 · N471AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2025082961089Landing · corrodedFWD CARGO AFT RT BULKHEAD PANEL LANDING IS CORRODED BEYOND REPAIR. GROUNDED - YES. REMOVED AND REPLACED FWD CARGO AFT RT BULKHEAD PANEL LANDING IAW B737-900ER SRM 51-40-02 AND BDWG 143A9481 REV -. PANEL LANDING FOUND TO HAVE 100% MATERIAL LOSS.Aug 29, 2025 · N471AS · Boeing 737990ER · Fuselage Structure (General)SDR ASAA2025082761129Transition Panel · corrodedFWD CARGO TRANSITION PROFILE CORRODED AT STA 500L TO 500A AND BL 25R. GROUNDED - YES. REMOVED CORROSION AS REQ IN MULTIPLE AREAS. ORIG THICKNESS IS 0.040 PER SRM 53-30-53-01-02. LOWEST MATERIAL REMOVED WAS 0.020 REMAINING THICKNESS IS 0.020. FOUND TO BE OUT OFAug 27, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082761128Shield · corrodedFWD CARGO TRANSITION PROFILE CORRODED AT BS 500 AND BL 25R. GROUNDED - YES. REMOVED FWD CARGO TRANSITION PROFILE AT STA 500. LOCATED AND DRILLED NEW PART IAW B737-900ER SRM 51-40-05. P/N 143A8126Y38 PO 1132983.1 PER B DWG 143A8126 REV -. INSTALLED NEW PART IN Aug 27, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082760554Transition Panel · corrodedFWD CARGO LH TRANSITION PANEL CORRODED AT STA 500H TO 500J. GROUNDED - YES. REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS WITH 30% MATERIAL LOSS IAW B737-900ER SRM 53-30-53-01-2 AND 53-00-53-1A-2. TOOL T8224V CAL DUE 31/MAR/26. ACCOMPLISHED SIDEPLATE SPLICE Aug 27, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082661257Channel · corrodedAFT CARGO COMPARTMENT LONGITUDINAL FLOOR SUPPORT ASSEMBLY B/N: STA 727A & 727I, S-25L & S-26L, HAS MULTIPLE CORROSION SPOTS. GROUNDED - YES. DAMAGE FOUND TO BE CORRODED THROUGH IN MULTIPLE LOCATIONS WITH 100% MAT LOSS. FOUND TO BE OUT OF LIMITS IAW B737-900ER Aug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082661255Channel · corrodedAFT CARGO COMPARTMENT LONGITUDINAL FLOOR SUPPORT ASSEMBLY BS 727A & 727I, S-25R & S-26R, HAS MULITPLE CORROSION SPOTS. GROUNDED - YES. DAMAGE FOUND TO BE CORRODED THROUGH IN MULTIPLE LOCATIONS WITH 100% MAT LOSS. FOUND TO BE OUT OF LIMITS IAW SRM 53-60-53-01-2Aug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082661090Floor Support · corrodedAFT CARGO COMPARTMENT LONGITUDINAL FLOOR SUPPORT ASSEMBLY B/N STA 727I & 767, S -25R & S -26R, HAS MULTIPLE CORROSION SPOTS. GROUNDED - YES. DAMAGE FOUND TO BE CORRODED THROUGH IN MULTIPLE LOCATIONS WITH 100% MATERIAL LOSS. FOUND TO BE OUT OF LIMITS PER SRM 53Aug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082660957Frame Splice · corrodedAFT CARGO COMPARTMENT RH LOWER FRAME B/N: STA 787, S-25R & S-24R HAS CORROSION. GROUNDED - YES. SPLICE HAS NO ALLOWABLE LIMITS REMOVED CORRODED SPLICE AND INSTALLED P#146A1300-3 PER B737-900ER SRM 51-40-02 AND BDWG 146A1262 REV J.Aug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Main, FrameSDR ASAA2025082660939Shield · corrodedAFT CARGO COMPARTMENT LONGITUDINAL FLOOR SUPPORT ASSEMBLY BETWEEN: BS 767 & 787. S25R & S26R, HAS MULTIPLE CORROSION SPOTS. GROUNDED - YES. BLENDED AWAY CORROSION, ORIGINAL THICKNESS (SHIELD) .050 MAT LOSS .017, REMAINING THICK .033, AREA OUT OF LIMITS PER SRMAug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082660553Floor Support · corrodedAFT CARGO COMPARTMENT LONGITUDINAL FLOOR SUPPORT ASSEMBLY B/N STA 727I AND 847, S-25L & S-26L HAS MULTIPLE CORROSION SPOTS. GROUNDED - YES. DAMAGE FOUND TO BE CORRODED THROUGH WITH 100 PERCENT MATERIAL LOSS. FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-53-Aug 26, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025082260940Web · corrodedFWD CARGO DOOR WEB IS CORRODED IN NUMEROUS PLACES. GROUNDED - YES. CORROSION REMOVED, ORIGINAL THICKNESS .045, MAT LOSS .0175, REMAINING THICKNESS .0275, AREA OUT OF LIMITS PER B737-900ER SRM 53-30-15-1A-1 REMOVED WEB AND INSTALLED IAW SRM 51-40-02 AND DWG 143Aug 22, 2025 · N471AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2025050457738Battery Pack · inoperativeEMERGENCY LIGHTS IN LH PREMIUM SECTION INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY FOR POWER SUPPLY M2335, OPS CHECK GOOD. AMM REF 33-51-06-960-805.May 4, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025031756641Light · unsecureTECH SERVICE REQUEST. FOLLOW UP TO REPORTS OF PHOTOLUMINESCENT STRIP LIFTING UP DURING FLIGHT AT APPROX ROW 13-----#PRI1-----. GROUNDED - YES. (RESOLVED ON W/O: 2041532 TASKCARD: N/R-00002 ) CHECK RH SIDE ON BOTH ENDS FOUND SECURED/IN LIMITS REMOVED/REPLACED PMar 10, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025022456253Unknown · odorAT ROTATION + INITIAL CLIMB OVERLY STRONG FUMES / ODOR ENTERED THE CABIN + FLIGHT DECK. LASTED ABOUT ONE MINUTE + GRADUALLY DISSIPATED. NOTICE A SIMILAR ODOR WHEN #2 ENG WAS SHUT DOWN DURING TAXI - IN. GROUNDED - YES. AIR TURNBACK - RECEIVED TURNOVER FROM FLIGFeb 24, 2025 · N471AS · Boeing 737990ER · Air Distribution SystemSDR ASAA2025012655526Power Supply · inoperativeWHILE T/C 72025000, FOUND LEFT SLIDE/WING LIGHT WON'T WORK. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK PER AMM 33-51-06.1 C/B OPENED AND CLOSED. OPS CHECK NORMAL.Jan 26, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2025012655525Power Supply · inoperativeWHILE T/C 72025000, FOUND LEFT SLIDE LIGHT WON'T WORK. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK PER AMM 33-51-06.1 C/B OPENED AND CLOSED. OPS CHECK NORMAL.Jan 26, 2025 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2024070250714None · noneCATERING REPORTS L2 DOOR DIFFICULT TO USE, CALLED FOR CONSULT. GROUNDED - YES. VERIFIED L2 DOOR OPS CHECK PER AMM 52-13-00, L2 DOOR OPERATES NORMALLY WITH NO DEFECTS NOTED.Jul 2, 2024 · N471AS · Boeing 737990ER · Passenger/Crew DoorsSDR ASAA2024060650162Sign · detachedFA REPORTS FWD GALLEY CALL LIGHT PANEL FALLING DOWN. GROUNDED - YES. VERIFIED FAULT, FOUND I/B RETAINER BROKEN OFF. REPLACED FWD ENTRY EXIT SIGN ASSEMBLY PLUS FWD GALLEY MASTER CALL LIGHT INFO LIGHT ASSEMBLY. ACCOMP EMERGENCY LIGHTS OPS TEST, TEST PASS ALSO ACJun 6, 2024 · N471AS · Boeing 737990ER · Emergency LightingSDR ASAA2023110346001Unknown · unknownENG ECONOMIC FAULT 77-20861. GROUNDED - YES. CHECKED AND CONFIRMED ENG FAULT 77-20861, ECONOMIC FAULT EGT BOTTOM LEFT T 495S3, RE-CHECK IN 50 FIT HOURS, RELEASED PER TC 78273000. RECHECKED NO FAULTS FOUND/SHOWN. THIS CLEARS PLT DEFERRAL.Nov 3, 2023 · N471AS · Boeing 737990ER · Engine Temperature Indicating SystemSDR ASAA2023102345797Unknown · unknownUPON LANDING, MASTER CAUTION 'AUTO FAIL' AND 'ALTN' ILLUMINATED ON PRESSURIZATINO CONTROL PANEL. GROUNDED - YES. CONFIRMED, CPC #2 SET CURRENT LEG FAILURE 007: OFV LRU FAIL, CPC #1 SET NO RELATED RECENT FAILURES. ACCOMPLISHED CPC SYSTEM GROUND TEST PER AMM 23-Oct 23, 2023 · N471AS · Boeing 737990ER · Cabin Pressure Control SystemSDR ASAA2023092445308Unknown · unknownON TAKE OFF CA AN FO FLIGHT DIRECTOR WENT OFF. DID RESET THEM GOT CA FO BACK AND THEN REALIZED FO COMPAS ROSE WAS MISSING. MAP MFD CLEARED ON LANDING ON FO SIDE. GROUNDED - YES. AIR TURNBACK - PERFORMED ADIRU BIT PROCEDURE REF AMM 34-31-00. NO FAULT NOTED FO'SSep 24, 2023 · N471AS · Boeing 737990ER · Navigation SystemSDR ASAA2023080244374Control Panel · malfunctionedMCP HEADING SELECTOR SWITCH KNOB STUCK ON HEADING 238. SWITCH KNOB ROTATE FREELY BUT HEADING DOES NOT CHANGE. GROUNDED - YES. CONFIRMED MCP LOCKED UP. OPENED-TAGGED 9 EACH C/B'S. REPLACED MCP. CLOSED AND REMOVED TAGS ON 9 EACH C/B'S. MCP AND LLM TESTS NORMAL RAug 2, 2023 · N471AS · Boeing 737990ER · Autopilot SystemSDR ASAA2023080144346Unknown · unknown#1 ENGINE FIRE HANDLE DOES NOT ILLUMINATE DURING OVHT/FIRE TEST. GROUNDED - YES. ON DEFERRAL.Aug 1, 2023 · N471AS · Boeing 737990ER · Fire Protection SystemSDR ASAA2023072944299Unknown · unknownFIRE DECTION ENG 1 LOOP B INOP. GROUNDED - YES. PERFORMED TEST NO FAULTS AT HANDLE AND FIRE DETECTION CONTROL UNIT REF B737-900 AMM 26-10-00-710-801.Jul 29, 2023 · N471AS · Boeing 737990ER · Fire Protection SystemSDR ASAA2023072844307Display · faultyF/O MCDU SCREEN SHOWED JUMBLED WEIRD CHARACTERS AND LETTERS MULTIPLE TIMES ENROUTE. GROUNDED - YES. REMOVED AND REPLACED F/O MCDU. OPS CHECK GOOD IAW B737-900 AMM 34-61-01-400-802.Jul 28, 2023 · N471AS · Boeing 737990ER · Flight Management Computing Hardware SystemSDR ASAA2023070243875Unknown · unknownR(FO) MCDU OCCASIONALLY BLANKS, THEN PAGE RETURNS WITH ABOUT HALF THE CHARACTERS MISSING AND SOME APPEARING GRAY. FULL PAGE RETURNS WITHIN A FEW SECONDS. MCDU CAPABILITIES (E.G. SELECTING VREF ON INT/REF PAGE) WORK NORMALLY. GROUNDED - YES. PER B737-900 FIM 34Jul 2, 2023 · N471AS · Boeing 737990ER · Flight Management Computing Hardware System
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