N442AS

Service difficulty reports · 249

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 = 'N442AS' 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 ASAA2025071059342Circuit Breaker · brokenDURING ETF C/B CHECK FOUND P6-11 CABIN EMERG LIGHT BREAKER BROKEN. GROUNDED - YES. REMOVED AND REPLACED P6-11 EMERGENCY LIGHTS C/B REF WDM 33-51-11-4. C/B WIRED TO AFT FA EMERG PUSH BUTTON. OPS CHECK GOOD. AMM 33-51-00.Jul 10, 2025 · N442AS · Boeing 737990ER · Light System WiringSDR ASAA2025010655121Lens · detachedMID CABIN EMERGENCY EXIT SIGN COVER CAME OFF. GROUNDED - YES. RE ATTACHED MID CABIN EMERGENCY EXIT SIGN.Jan 6, 2025 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2024112154022Power Supply · inoperativeLEFT OVERWING EXIT LIGHTS ARE INOP. GROUNDED - YES. REMOVED AND REPLACED M1670 POWER SUPPLY IAW B737-900 AMM 33-51-06-960-806. OPS CHECK GOOD.Nov 21, 2024 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2024102953869Transition Panel · corrodedFWD PIT L/H TRANSITION PANEL FOUND TO BE OUT OF LIMITS FRON STA.500A+16 TO 500L. GROUNDED - YES. REPAIRED FWD PIT L/H TRANSISTION PANEL FROM STA500A+16 TO 500L IAW B737-NG SRM 53-00-53-2R-5.Oct 29, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024102953664Transition Panel · corrodedAFT PIT R/H TRANSITION PANEL OUT OF LIMITS FROM STA. 727D+14 TO STA 767. GROUNDED - YES. REPAIRED AFT PIT R/H TRANSITION PANEL FROM STA 727D+14 - 767 IAW B737-NG SRM 53-00-53-2R-5.Oct 29, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024102153663Channel · corrodedAFT PIT LH TRANSITION STA 727I+9 TO 727E+10 HAS NUMEROUS SPOTS OF CORROSION. GROUNDED - YES. EVALUATED CORROSION ON AFT PIT L/H TRANSITION AT STA 727I+9 TO 727E+10 ORIGINAL MATERIAL = .040, MMATERIAL REMOVED = .010, MATERIAL REMAINING = .030 AT LOWEST READING.Oct 21, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024102053721Intercostal · corrodedMAIN CABIN STA 946 INTERCOSTAL HAS CORR FASTENER. GROUNDED - YES. REMOVED CORROSION ORIG .080, REMAIN .066, LOSS OF .014. FOUND OUT OF LIMITS IAW B737 900ER SRM 53-70-51 REMOVED AND REPLACED INTERCOSTAL AND LAV MOUNT ALL IAW BAC DWG 147A5650 REV C.Oct 20, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024102053665Sill Drain · corrodedMAIN CABIN R2 MOP SILL STA 946-986 CORR. GROUNDED - YES. REMOVED CORROSION, ORIG .080, REMAIN .039 LOSS OF .041, FOUND OUT OF LIMITS IAW B737-900ER SRM 53-70-15. ACCOMPLISHED HFEC INSPECTIONS IAW B737 NDTM PT 6 51-00-00. ACCOMPLISHED DVI IAW B737-900ER SRM 51-Oct 20, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024101953532Floor Panel · brokenRIGHT O/B FLOOR PANEL JUST FWD OF R-2 DOOR HAS 5EA CORRODED INSERTS. GROUNDED - YES. REPAIRED RIGHT O/B FLOOR PANEL JUST FWD OF R-2 DOOR 5EA CORRODED INSERTS WITH A PERMANENT REPAIR IAW B737-900ER SRM 53-00-50-2R-0.Oct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953531Floor Panel · brokenCTR FLOOR PANEL BETWEEN R-2 AND L-2 DOOR HAS 1EA CORRODED INSERT. GROUNDED - YES. REPAIRED CTR FLOOR PANEL BETWEEN R-2 AND L-2 DOOR CORRODED INSERTS, 2EA,WITH A PERMANENT REPAIR IAW B737-900ER SRM 53-00-50-2R-0.Oct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953530Floor Panel · delaminatedLEFT O/B FLOOR PANEL JUST FWD OF L-2 DOOR HAS 5EA CORRODED INSERTS. GROUNDED - YES. REPAIRED LEFT O/B FLOOR PANEL JUST FWD OF L-2 DOOR 5EA CORRODED INSERTS AND AN AREA OF DELAMINATION WITH A PERMANENT REPAIR IAW B737-900ER SRM 53-00-50-1A-1,53-00-50-2R-0,53-00Oct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953528Floor Panel · delaminatedLEFT O/B FLOOR PANEL AT L-2 DOOR HAS TORN AND SEPERATED FIBERGLASS WITH MISSING INSERT. GROUNDED - YES. PERFORMED PERMANENT REPAIR ON LEFT O/B FLOOR PANEL AT L-2 DOOR #:147A5810-439 IAW ASA B737-900 ER SRM 53-00-50-2R-0, ASA B737-900 ER SRM 53-00-50-2R-2 & ASAOct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953527Floor Panel · corrodedLEFT O/B FLOOR PANEL AT L-2 DOOR HAS 6EA CORRODED INSERTS. GROUNDED - YES. REMOVED 28EA CORRODED INSERTS ON LEFT O/B FLOOR PANEL AT L-2 DOOR #:147A5810-439 AND REPLACED WITH 28EA NEW INSERTS IAW ASA B737-900 ER SRM 53-00-50-2R-0. NO FURTHER ACTION REQUIRED.Oct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953526Floor Panel · corrodedRIGHT O/B FLOOR PANEL AT R-2 DOOR HAS 7EA CORRODED INSERTS. GROUNDED - YES. REMOVED 16EA CORRODED INSERTS ON RIGHT O/B PANEL AT R-2 DOOR#: 147A5810-440 AND REPLACED WITH 16EA NEW INSERTS IAW ASA B737-900ER SRM 53-00-50-2R-0. NO FURTHER ACTION REQUIRED.Oct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101953525Floor Panel · delaminatedRIGHT O/B FLOOR PANEL AT R-2 DOOR HAS TORN FIBERGLASS. GROUNDED - YES. PERFORMED PERMANENT REPAIR ON RIGHT O/B FLOOR PANEL AT R-2 DOOR#: 147A5810- 440 IAW ASA B737-900ER SRM 53-00-50-2R-7 & ASA B737-900ER SRM 53-00-50-2R-0. NO FURTHER ACTION REQUIREDOct 19, 2024 · N442AS · Boeing 737990ER · Fuselage Floor PanelSDR ASAA2024101853379Frame Splice · corrodedAFT CARGO RH FRAME SPLICE AT STA 727I IS CORRODED GROUNDED - YES. SPLICE EVALUATED AND FOUND W/ NO ALLOWABLE LIMITS IAW B737-900 SRM 53-00-07-1A-1 REMOVED IAW B737-900 SRM 51-40-02, LOCATE AND DRILLED HOLES IN SPLICE IAW B737-900 SRM 51-40-05 AND BAC DWG 146A1Oct 18, 2024 · N442AS · Boeing 737990ER · Fuselage Main, FrameSDR ASAA2024101653722Transition Panel · corrodedFWD PIT RH TRANSITION STA 500A TO 500L HAS NUMEROUS SPOTS OF CORROSION. GROUNDED - YES. REMOVED CORROSION, ORIGINAL MATERIAL THICKNESS .040, REMOVED .040, REMAINING .000, FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. REPAIRED FWD PIT R/H TRANSITIONOct 16, 2024 · N442AS · Boeing 737990ER · Fuselage Miscellaneous StructureSDR ASAA2024082852165Lens · brokenWHILE ACCOMPLISHING T/C MULTI-33EO-27264-1, AFT GALLEY EMERGENCY LIGHT ASSEMBLIES L1190 AND L1191 HAVE BROKEN BASE LENS RETAINERS ON THE UPPER PORTION OF BASE. GROUNDED - YES. REMOVED AND REPLACED EXIT SIGN LIGHT ASSEMBLIES L1190 AND L1191 IN THE AFT GALLEY REAug 28, 2024 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2023103145953Control Valve · faultyLEFT PACK PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. PERFORMED BITE CHECK ON THE LEFT PACK TEMP CONTROLLER PER FIM 21-62 TASK 801, FOUND FAULT 'TCV FOR THIS PACK' PER FIM 21-62 TASK 830. REMOVED AND REPLACED THE LEFT PACK TEMPERATURE CONTROL VALVE IAW AOct 31, 2023 · N442AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023103145959Blade · damagedWHILE ACCOMPLISHING FAN LUBE FOUND 8 PLATFORMS WORN/DAMAGED. GROUNDED - YES. REPLACED 8 PLATFORMS WHILE PERFORMING TASK CARD 78472010.Oct 31, 2023 · N442AS · Boeing 737990ER · Turbine Engine Air Inlet SectionSDR ASAA2023103046084Knob · malfunctionedFOLLOW UP TO #2 ENGINE START KNOB FALLING OFF CAUSING DELAYS. -----#PRI2-----. GROUNDED - YES. (RESOLVED ON W/O: 1975502 TASKCARD: N/R-00001 ) REPLACED NO.2 ENG START KNOB REF AMM 80-11-00. CLOSES TSR715188 OP CHK GOOD. SEAMC NOTIFIED.Oct 30, 2023 · N442AS · Boeing 737990ER · Engine Starting SystemSDR ASAA2023103045929Unknown · unknownON TAXI - #2 ENGINE START SWITCH FELL OFF RHEOSTAT. ALLEN TIGHTENING SCREWS LOOSE. GROUNDED - YES. TIGHTENED SET SCREWS.Oct 30, 2023 · N442AS · Boeing 737990ER · Engine CrankingSDR ASAA2023102645860Unknown · unknownFA SEATED IN AFT CABIN REPORTS VIBRATION IN FLOOR WHEN WE ARRIVED AT GATE IN SEA AFTER ENGINE SHUTDOWN. CO-INCIDED WITH APU BLEED AIR ON. VIBRATION WENT AWAY WHEN APU BLEED TURNED OFF. GROUNDED - YES. (RESOLVED ON W/O: 1974796 TASKCARD: N/R-00003 ) APU RAN IN Oct 26, 2023 · N442AS · Boeing 737990ER · APU Bleed Air SystemSDR ASAA2023102145756Unknown · unknownCONT CABIN ZONE TEMP OVERHEAD LIGHT ON RECALL. GROUNDED - YES. PERFOMRED B737-900 FIM 21-62 TASK 903. PER INITIAL EVALUATION CONTROLLER PASSED VERIFY TEST MULTIPLE TIMES. FAULT CLEARED NO FURTHER ACTION REQUIRED.Oct 21, 2023 · N442AS · Boeing 737990ER · Cabin Temperature Control SystemSDR ASAA2023101745710Lens · missingAFT BULKHEAD EMERGENCY EXIT SIGN LENSE MISSING. GROUNDED - YES. REPLACED LIGHT/ LENSE FLOOD LIGHT. A/C OK FOR SERVICE SEAMC TODD NOTIFIEDQ6TR841X.Oct 17, 2023 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2023101545677Unknown · unknownLEFT HAND PACK LIGHT ILLUMONATES ON RECALL AND EXTINGUISHES WHEN RESET. GROUNDED - YES. PERFORMED #1 BITE CONTROLLER TEST REF FIM 21-62 TASK 801.TEST PASSED. NO HISTORY 60 DAYS. GROUND VERIFICATION ACCOMPLISHED. FLT CREW PLACARD REMOVED.SEAMC MARC NOTIFIED.Oct 15, 2023 · N442AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023100445455Transceiver · malfunctionedHF #2 FAIL IN ACTIVE AND FAIL IN STANDBY DISPLAYED. IT DOES THIS INTERMITTENTLY. GROUNDED - YES. REMOVED & REPLACED #2 HF TRANSCEIVER REF AMM 23-11-21 OPS CHK GOOD SEAMC CHRIS NOTIFIED NON ASA # TSAR 174M.Oct 4, 2023 · N442AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023091345137Unknown · unknownWHILE PERFORMING T/C 78273000 FOUND @2 ENG. FC LONG TIME FAULT 73-10192 INTERNAL EEC FAULT. PLACED FAULT ON 450 FT HR PLT. GROUNDED - YES. ON DEFERRAL.Sep 13, 2023 · N442AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023082544783Lens · missingEMERGENCY LIGHT LENS COVER MISSING OVER ROW 19 D. GROUNDED - YES. MISSING EMERGENCY AISLE LIGHT LENS NEAR ROW 19 . INSTALLED LENS REF CMM 33-20-25: OK.Aug 25, 2023 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2023081844666Switch · inoperativeWHILE PERFORMING TASK CARD 78273000, FOUND FAULT 73-10312 "THE START SWITCH SIGNAL AND ARINC BUS DATA DISAGREE" ON ENGINE 2. GROUNDED - YES. PERFORMED START SWITCH SIGNAL AND ARINC BUS DATA DISAGREE IAW B737-800 FIM 73-24 TASK 813. FOUND START SWITCH INOP. REMAug 18, 2023 · N442AS · Boeing 737990ER · Engine CrankingSDR ASAA2023081444591Unknown · unknownELEC LIGHT ON AC/DC METERING PANEL AT THE GATE. GROUNDED - YES. P5-13 BITE INDICATES SPCU INOP. DOES NOT CLEAR. PER FIM 24-34 TASK 802, CYCLED SPCU B1, B2 C/B'S. FAULT CLEARS AND DOES NOT REPOPULATE. CONFIRMED STANDBY BUSSES POWERED IN AUTO AND BAT. ETOPS GROUAug 14, 2023 · N442AS · Boeing 737990ER · DC Generating SystemSDR ASAA2023071744084Eec · faultyREF. TC. 7827300 ENGINE NUMBER 2 SHOWS ST FAULT 75-10422. THE HMU VBV CONTROL CURRENT IS OUT OF RANGE. GROUNDED - YES. REF. DEFECT 60495184 -- #2 ENGINE EEC REMOVED AND REPLACED PER AMM 73-21-60-000-801-F00. FOUR MIG-51A TAGS INTALLED AND REMOVED. SOFTWARE 204Jul 17, 2023 · N442AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023071744081Eec · faultyREF. TC. 78273000 ENGINE NUMBER 2 SHOWS ST FAULT. 73-10322, THE HMU FMV CONTROL CURRENT IS OUT OF RANGE. GROUNDED - YES. REF. DEFECT 60495184 -- #2 ENGINE EEC REMOVED AND REPLACED PER AMM 73-21-60-000-801-F00. FOUR MIG-51A TAGS INTALLED AND REMOVED. SOFTWARE 2Jul 17, 2023 · N442AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023071744080Eec · faultyREF. TC. 78273000 ENGINE NUMBER 2 SHOWS ST FAULT. 73-11402. INTERNAL EEC FAULT. GROUNDED - YES. #2 ENGINE EEC REMOVED AND REPLACED PER AMM 73-21-60-000-801-F00. FOUR MIG-51A TAGS INTALLED AND REMOVED. SOFTWARE 2044M25P20 VERIFIED DURING AMM TASK 73-21-00-700-8Jul 17, 2023 · N442AS · Boeing 737990ER · Fuel Controlling SystemSDR ASAA2023071544052Unknown · unknownLEFT FWD WINDOW HEAT OVERHEAT. GROUNDED - YES. PERFORMED VOLTAGE AT LH FWD WINDOW HEAT CONTROLLER IAW B737-900 AMM 30-41-11 AND PERFORMED BITE OF CONTROLLER IAW B737-9 FIM 30-41 TASK 801 CYCLED AND INSPECTED C/B FOR LEFT FWD WINDOW HEAT AMM 20-60-01. WINDOW HEJul 15, 2023 · N442AS · Boeing 737990ER · Windshield/Door Rain/Ice RemovalSDR ASAA2023070343859Unknown · unknownPRIOR TO PUSH RIGHT PACK LIGHT ILLUMINATED. APPLIED QRH AND PACK LIGHT RESET. PACK LIGHT ILLUMINATED AGAIN AFTER ENGINE START AND WOULD NOT RESET. RETURN TO GATE. GROUNDED - YES. ON DEFERRAL.Jul 3, 2023 · N442AS · Boeing 737990ER · Cabin Cooling SystemSDR ASAA2023062043648Lens · missingROW 16ABC EXIT FLOOR LIGHT LENS MISSING. GROUNDED - YES. REPLACED ROW 16ABC EXIT FLOOR LIGHT LENS COVER, OPS CHECK NORMAL. REF B737-900 AIPC 33-51-01-06F ITEM 140.Jun 20, 2023 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2023061643614Unknown · unknownFWD R WINDOW HEAT FAILS TO ILLUMINATE. GROUNDED - YES. DOWN POWERED A/C AND RE-APPLIED POWER AFTER 5 MINS PER B737-900 AMM 20-60-99. OPS CHECK NORMAL.Jun 16, 2023 · N442AS · Boeing 737990ER · Ice/Rain Protection SystemSDR ASAA2023061533571Outflow Valve · faultyFLIGHT ATTENDANT REPORTED A NOISE THEY HAD NOT HEARD BEFORE THAT SOUNDED LIKE AIR RUSHING COMING FROM BEHIND THE AFT GALLEY. WE WERE AT 260 LEVEL. WE NOTICED DURING OUR CONVERSATION THAT THE CABIN ALTITUDE RATE INDICATOR WAS FLUCTUATING AND THAT SEEMED TO SINKJun 13, 2023 · N442AS · Boeing 737990ER · Pressure Regulator/Outflow ValveSDR ASAA2023061343560Unknown · unknownRADAR TILT SEEMS TO BE INACCURATE. IN MANUAL MODE, -2 DEG TILT RETURNS GROUND CLUTTER AT 80 NM AT FL 330. GROUNDED - YES. PERFORMED WEATHER RADAR SYS BITE CK REF B737-900 FIM 34-43 TASK 801. OPS CK GOOD, NO DISCREPANCIES NOTED.Jun 13, 2023 · N442AS · Boeing 737990ER · Navigation SystemSDR ASAA2023052043293Sliding Window · failedDURING CLIMB IN CLOUDS AND PRECIPITATION, PILOTS HEARD SNAPPING SOUND. F/O FOUND COILED CORD FOR RH #2 WINDOW HEAT DISCONNECTED FROM BULKHEAD CANNON RECEPTACLE AND PLUG PINS ARCING FROM STATIC DISCHARGE. GROUNDED - YES. REMOVED & REPLACED RH SIDE WINDOW #2 IAWMay 20, 2023 · N442AS · Boeing 737990ER · Flight Compartment WindowsSDR ASAA2023052043292Sliding Window · failedRH SIDE WINDOW (#2) OVERHEAT LIGHT ILLUMINATED. QRC RESET PROCEDURE DID NOT RESULT IN NORMAL OPERATION. GROUNDED - YES. REMOVED AND REPLACED RH SIDE WINDOW #2 IAW B737-900 AMM 56-12-11.May 20, 2023 · N442AS · Boeing 737990ER · Flight Compartment WindowsSDR ASAA2023041242841Unknown · unknownSMALL EXIT SIGN COVER FELL OFF AT 17F. GROUNDED - YES. ATTACHED SMALL EXIT SIGN AS REQUIRED.Apr 12, 2023 · N442AS · Boeing 737990ER · Emergency LightingSDR ASAA2023031742401Unknown · unknownAFTER POWER TRANSFER, SATCOM LOCKUP OCCURRED. FOLLOWED QRH PROCEDURE. SAT RETURNED TO NORMAL OPS AFTER NEXT POWER TRANSFER LOCKUP OCCURRED AGAIN. GROUNDED - YES. REF L/P 60589552 -- ACCOMPLISHED SDU SOFTWARE LOAD REF B737-900 AMM 23-15-00-470-801 3 FILES LOADMar 17, 2023 · N442AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023031042299Unknown · unknownSATCOM LOCKUP GROUNDED - YES. PERFORMED SATCOM LOCKUP PROCEDURE PER QRH - SAT ON CAPT SIDE.Mar 10, 2023 · N442AS · Boeing 737990ER · Communications SystemSDR ASAA2023022342064Unknown · unknownSATCOM LOG SHOW SAT1 FAIL. GROUNDED - YES. ACCOMPLISHED SDU SOFTWARE LOAD REF B737-900 AMM 23-15-00-470-801 3 FILES LOADED "CONFIG CRC" AC391300 VERIFIED, CIM OPTIONS SAVED. VERIFIED AOC DIR NUMBERS PRESENT. SATCOM SYSTEM TEST PASS REF AMM 23-15-00-730-801 CAFeb 23, 2023 · N442AS · Boeing 737990ER · HF Communications SystemSDR ASAA2023013141749Not Entered · not enteredZONE TEMP LIGHT ON RECALL ILLUMINATED. GROUNDED - YES. PZTC BITE FAULTED FLT DECK TRIM VALVE ON BIT AND PREV FLT. GREEN GO LT ILLUMINATED AND CLEARED FAULT. RAN R & L A/C PACKS = AFT, FWD, AND CONT CAB TEMP CONTROL WAS SLUGGISH BUT OPERABLE WITH NO REOCCURRENCJan 31, 2023 · N442AS · Boeing 737990ER · Cabin Temperature Control SystemSDR ASAA2023012041607Switch · faultedGREEN LED "A/T ARM" LIGHT NOT ILLUMINATING. GROUNDED - YES. AUTHOTHROTTLE BITE PROCEDURE ACCOMPLISHED IAW B737-900 FIM 22-31 TASK 801 SYSTEM CHECKED AND FOUND OK. MCP A/T MODE SELECTOR SWITCH PROBLEM FIM 22-31 TASK 809 ACCOMPLISHED NO FAULTS SEEN. ORIG SUB DAJan 20, 2023 · N442AS · Boeing 737990ER · Auto Throttle SystemSDR ASAA2023011741522Control Panel · faultedWHEN ON DOG LEG TO FINAL HEADING SELECT KNOB WOULD NOT CHANGE THE HEADING IN THE WINDOW. WHEN ON FINAL IT WORKED AGAIN. GROUNDED - YES. DUPLICATED PROBLEM, HEADING KNOB INTERMITTANT. REMOVED/REPLACED DFCS MODE CONT PNL PER B737-900 AMM 22-11-34, SYS OPS CKS NMJan 14, 2023 · N442AS · Boeing 737990ER · Autopilot SystemSDR ASAA2023010741439Unknown · unknownON DEP, HDG BUG WAS STUCK ON RWY HDG. UNSELECTABLE IN HDG MODE OR IN LNAV. F/D HDG MODE WAS NOT WORKING. APPROX 5 MINS LATER, HDG WAS AGAIN SELECTABLE. F/D HDG MODE AVAILABLE. NO FURTHER ISSUES. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 22-11 TASK 803. OPS TESJan 7, 2023 · N442AS · Boeing 737990ER · Auto Flight System
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