N534AS

Service difficulty reports · 339

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 = 'N534AS' 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 ASAA2022081739529Actuator · leakingTECH SERVICE REQUEST. FOLLOW UP TO REPORTS OF FUEL UNDER #2 ENGINE. GROUNDED - YES. REMOVED AND REPLACED VSV ACTUATOR PER B737-800 AMM 75-31-01.Aug 17, 2022 · N534AS · Boeing 737890 · Compressor Bleed ControlSDR ASAA2022081439518Fmc · intermittentDURING TAXI IN CAPTAINS NAV DISPLAY SHOWS VTK FLAG & BOTH CDU'S FMC SELECTIONS CARROTS DISAPPEAR. THIS CONDITION CYCLED ABOUT 8-10 TIMES DURING TAXI IN. GROUNDED - YES. PERFORMED RESET OF CB A6 & A7 ON P 18-2 PANEL AND RESET D 15 & 16 ON P 6-1 PANEL. PERFORMEDAug 14, 2022 · N534AS · Boeing 737890 · Flight Management Computing Software SystemSDR ASAA2022080439403Jam-Nut · looseFLEET SERVICED REPORT R1 DOOR IS UNABLE TO CLOSE. GROUNDED - YES. FOUND JAM NUT LOOSE ON R1 DOOR GUIDE ARM. ACCOMPLISHED GUIDE ARM ADJUSTMENT REF B737-800 AMM TASK 52-41-00-820-801 STEP I.Aug 4, 2022 · N534AS · Boeing 737890 · Service DoorsSDR ASAA2022071739113Harness · damaged# 2 ENGINE EGT HARNESS CHAFFING ABOVE RT VSV. GROUNDED - YES. REPLACED J10 + J9 HARNESS PER B737-800 AMM 73-21-06.Jul 17, 2022 · N534AS · Boeing 737890 · Fuel Controlling SystemSDR ASAA2022071339090Actuator · leakingDURING WALK FOUND EVIDENCE OF FUEL UNDER ENGINE #2. GROUNDED - YES. REMOVED AND REPLACED ENG 2 RIGHT VSV ACTUATOR REF B737-800 AMM 75-31-01-400-802-F00.Jul 13, 2022 · N534AS · Boeing 737890 · Compressor Bleed ControlSDR ASAA2022070938996Control Panel · faultyWX RADAR AUTO MODE DOES NOT WORK PROPERLY ON CA SIDE. GROUNDED - YES. PERFORMED OPS CHECK REF B737-800 AMM 34-43-00-710-802-001 OPS CHECK NORMAL UNABLE TO DUPLICATE ON GROUND. REPLACED WXR CNTRL PANEL PRECAUTIONARY AND INSTALLATION TEST NML REF AMM 34-43-91/40Jul 9, 2022 · N534AS · Boeing 737890 · Doppler SystemSDR ASAA2022062738878Battery Pack · inoperativeSEVERAL CABIN EMERGENCY EXIT LIGHTS / SIGNS INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK/ POWER SUPPLIES AT POSITIONS M1671, M1695, AND M2335 IAW B737-800 AMM 33-51-06-960-805 AND 33-51-06-960-806TEST GOOD.Jun 27, 2022 · N534AS · Boeing 737890 · Emergency LightingSDR ASAA2022061738818Skin · crackedCRACK ON LOWER SKIN OF RH HORIZONTAL STAB INBOARD OS STAB. STA .138.70. MARKED. GROUNDED - YES. REPAIRED THE LOWER SKIN OF THE R/H HORIZ STAB PER B737-800 SRM 55-10-01-2R-11.REPAIR IS A CAT "B" AND HAS AN INSPECTION THRESHOLD OF 56,000 TOTAL FLIGHT CYCLES PER Jun 17, 2022 · N534AS · Boeing 737890 · Horizontal Stabilizer StructureSDR ASAA2022060738740Shield · corrodedAFT PIT, FWD SHIELD STA 767 - 793 HAS CORROSION. GROUNDED - YES. AFT PIT FWD SHIELD STA 767-793 AND GUSSET CORROSION EVALUATION : OUT OF LIMITS DUE TO NO SRM LIMITS, REMOVED AND REPLACED SHIELD PN: 146A8127-12 AND GUSSET POR 146A8125-39 POR B737-800 SRM 51-40-Jun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060738739Transition Panel · corrodedAFT PIT R/H TRANSITION PANEL STA 727F+11 - 767 HAS CORROSION. GROUNDED - YES. AFT PIT RH TRANSITION PANEL STA 727F+11 - 767 CORROSION EVLAUATION FOUND TO BE 100% MATERIAL LOSS AND FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-00-53-1A-2; REPAIRED DAMAGED TRANSJun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060738738Transition Panel · corrodedAFT PIT R/H TRANSITION PANEL STA 727- 727F+11 HAS CORROSION. GROUNDED - YES. AFT PIT R/H TRANSITION PANEL STA 727-727F+11 CORROSION EVALUATION FOUND TO BE 100% MATERIAL LOSS ; AND FOUND TO BE OUT OF LIMITS PER B737-800SRM 53-00-53-1A-2; REPIARED DAMAGED TRANSIJun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060738736Transition Panel · corrodedAFT PIT L/H TRANSITION PANELS STA 727-727B+11 HAS CORROSION. GROUNDED - YES. EVALUATED AFT PIT L/H TRANSITION PANEL STA727-727B+11 IAW B737-800 SRM 53-00-53-1A-2 REMOVED DAMAGE, FABRICATED, ALODINED , PRIMED, INSTALLED NUTPLATES, AND INSTALLED NUTPLATES AND INJun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060738727Transition Panel · corrodedAFT PIT L/H TRANSITION PANEL STA 727B+11 -727G+11 HAS CORROSION. GROUNDED - YES. ELVAUATED AFT PIT L/H TRANSITION PANEL STA 727B+11 -727G+11 IAW B737-800 SRM 53-00-53-1A-2. REMOVED DAMAGE , FABRICATED , ALODINED, PRIMED, INSTALLED NUTPLATES, IAND INSTALLED REPJun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060738726Transition Panel · corrodedAFT PIT L/H TRANSITION PANEL STA 727G+11 - 817 HAS CORROSION. GROUNDED - YES. EVALUATED AFT PIT L/H TRANSITION PANEL STA 727G+11 -817 IAW B737-800 SRM 53-00-53-1A-2.REMOVED DAMAGE, FABRICATED, ALODINED, PRIMED, INSTALLED NUTPLATES, AND INSTALLED REPAIR PARTS IJun 7, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060538749Angle · corrodedFWD PIT, AFT BULKHEAD R/H SUPPORT HAS CORROSION. GROUNDED - YES. REMOVED CORROSION FROM ANGLE ASSY.ORIG .071,REMOVED .017,REMAINING .054 AND FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-30-08-1A-1-2-C-(1),REMOVED AND REPLACED ANGLE ASSY PER B737-800 SREM 51-4Jun 5, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060538748Angle · corrodedFWD PIT, AFT BULKHEAD LOWER SUPPORT HAS CORROSION. GROUNDED - YES. REMOVED CORROSION FROM ANGLE ASSY,ORIG .071,REMOVED .016,REMAINING .055AND FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-30-08-1A-1-2-C-(1);REMOVED AND REPLACED ANGLE PER B737-800 SRM 51-40-02 Jun 5, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060538747Transition Panel · corrodedFWD PIT R/H TRANSITION PANEL STA 500G+11-500I HAS CORROSION. GROUNDED - YES. REMOVED DAMAGE FROM FWD PIT R/H TRANSITION PANEL ST 500G+11 - 500I PER B737-800 SRM 53-30-53-05-2,REMOVED .008,ORIG .040;REMAINING 0.032AND FOUND TO BE OUT OF LIMITS PER B737-800 SRM Jun 5, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060538746Transition Panel · corrodedFWD PIT R/H TRANSITION PANEL STA 500B+15 - 500G HAS CORROSION. GROUNDED - YES. REMOVED DAMAGE FROM FWD PIT R/H TRANSITION PANEL STA 500B+15 -500G POR B737-800 SRM 53-30-53-05-2ORIG MAT. 0.040;REMOVED 0.008;REMAINING MAT 0.032 AND FOUND TO BE OUT OF LIMITS POR Jun 5, 2022 · N534AS · Boeing 737890 · Fuselage Miscellaneous StructureSDR ASAA2022060338759Floorbeam · corrodedMAIN CABIN AFT WET AREA STA 947 FLOOR BEAM HAS CORROSION ON UPPER SURFACE LBL 27 AT I/B LAV MOUNT. GROUNDED - YES. REMOVED CORROSION-ORIGINAL THICKNESS 0.180,REMOVED .029,REMAINING .151AND FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1TOOL # T8363L CJun 3, 2022 · N534AS · Boeing 737890 · Fuselage Main, StructureSDR ASAA2022042838177None · failed#2 FAN BLADE FAILS ULTRASOUND. GROUNDED - YES. REMOVED AND REPLACED BOTH #2 AND #14 FAN BLADES REF B737-800 AMM 72-21-02 TEST 7 VIBRATION SURVEY WAS GOOD.Apr 28, 2022 · N534AS · Boeing 737890 · Turbine Engine Air Inlet SectionSDR ASAA2022042138100Module · faultyLEFT FORWARD WINDOW HEAT INOPERATIVE DURING PREFLIGHT. GROUNDED - YES. REMOVED AND REPLACED WINDOW/PITOT HEAT MODULE P5-9 PER B737-800 AMM 30-41-41. PITOT PROBE, AOA SENSOR, AND TAT PROBE HEATER SYSTEM TEST NORMAL.Apr 21, 2022 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2022042138097Sensor · faultyBOTH RH WINDOW HEAT SYSTEMS INOP. GROUNDED - YES. REMOVED AND REPLACED WINDOW/PITOT HEAT MODULE P5-9 PER B737-800 AMM 30-41-41. PITOT PROBE, AOA SENSOR, AND TAT PROBE HEATER SYSTEM TEST NORMAL.Apr 21, 2022 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2022040537915Selector Knob · inoperativeON PREFLIGHT, FO COURSE SELECTOR COURSE WILL NOT CHANGE WITH KNOB MOVEMENT, KNOB CLICKS WHEN TURNING. GROUNDED - YES. RMVD & RPLCD DFCS MODE CONT PNL PER B737-800 AMM 22-11-34, ORIGINAL PROB FIXED BUT LAND VERIFY TEST FAILS WITH "ELEV POS FAIL MSG 22-11126, REApr 5, 2022 · N534AS · Boeing 737890 · Autopilot SystemSDR ASAA2022040537892Unknown · unknownFO COURSE SELECTOR SLOWLY CHANGES WITHOUT PILOT INPUT. GROUNDED - YES. AFTER POWER TRANSFER, MODE CONTROL PANEL WINDOW BLANKED. ACCOMPLISHED B737-800 FIM 22-11 TASK 803, OPS TEST NORMAL REF FIM 22-11 TASK 801.Apr 5, 2022 · N534AS · Boeing 737890 · Autopilot SystemSDR ASAA2022033037849Controller · abnormalREF LOG PAGE 6030849, R1 WINDOW CRACKED & HEATING ELEMENT BURNT. GROUNDED - YES. REMOVED & REPLACED WINDOW HEAT CONTROL UNIT PER B737-800 AMM 30-41-11-400-801.Mar 30, 2022 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2022030337610Unknown · unknown#1 HF RADIO FAIL DISPLAYED. GROUNDED - YES. PERFORMED HF COMMUNICATION SYSTEM BITE CHECK. BITE TEST PASSED. OPS CHECK RADIO COM. OPS CHECK GOOD. REF B737-800 FIM TASK 23-11 TAKS 801. OK FOR SERVICE.Mar 3, 2022 · N534AS · Boeing 737890 · HF Communications SystemSDR ASAA2021121436907Unknown · unknownLEFT FMC FAIL IN FLIGHT, THEN RESET ITSELF W/ NO FURTHER ACTION. GROUNDED - YES. REF B737-800 FIM 34-61 TASK 807 PERFORMED FMC RESET BOTH FMC OPS NORMAL.Dec 14, 2021 · N534AS · Boeing 737890 · Flight Management Computing Hardware SystemSDR ASAA2021120236780Nut Plate · broken#1 ENG 3 O'CLOCK FAN FRAME INNER STRUT HAS 1EA BROKEN NUTPLATE. GROUNDED - YES. REMOVED AND REPLACED NUTPLATE ON #1 ENGINE 3 O'CLOCK FAN FRAME, REF SRM 51-40-02.Dec 2, 2021 · N534AS · Boeing 737890 · Turbine Engine Air Inlet SectionSDR ASAA2021120236776Solenoid · failedWING THERMAL ANTI ICE VALVE FAILED. GROUNDED - YES. REPLACED WING TAI. ALL OPS NML REF B737-800 MM 30-11-12. GROUND VERIFICATION SATISFACTORY. SEAMC ETOPS MIKE NOTIFIED.Dec 2, 2021 · N534AS · Boeing 737890 · Ice/Rain Protection SystemSDR ASAA2021120136782Harness · damagedWHILE PERFORMING TASK CARD N842000 FOUND J9 HARNESS DAMAGED ON #1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE J9 HARNESS REF B737-800 AMM 73-21-06-00/400-802. ALL C/B'S HAVE BEEN CLOSED. ALL OPS CHECKS STILL NEED TO BE COMPLIED WITH J. THACH 31086 1Dec 1, 2021 · N534AS · Boeing 737890 · Fuel Controlling SystemSDR ASAA2021120136781Harness · damagedWHILE PERFORMING TASK CARD N842000 FOUND HARNESS MW311 HARNESS DAMAGED. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE MW311 HARNESS REF B737-800 AMM 73-21-06-00/400-802. ALL C/B'S HAVE BEEN CLOSED. ALL OPS TEST STILL NEED TO BE COMPLIED WITH. INSTALLED 3 O'CLDec 1, 2021 · N534AS · Boeing 737890 · Fuel Controlling SystemSDR ASAA2021120136779Regulator · damaged#1 ENGINE BLEED AIR REGULATOR HAS DAMAGED WIRES. GROUNDED - YES. REMOVED AND REPLACED BLEED AIR REGULATOR REF AMM 36-11-03. OPS CHECK, LEAK CHECK GOOD.Dec 1, 2021 · N534AS · Boeing 737890 · Pneumatic Distribution SystemSDR ASAA2021120136775Wire Harness · damagedWHILE PERFORMING TASK CARD N8420000 FOUND MW0315 HARNESS DAMAGED. GROUNDED - YES. REPLACED #1 ENGINE FIRE DETECTOR HARNESS MW0315, OPERATIONAL TEST PASSES REF B737-800 AMM 26-11-02-400-801. GROUND VERIFICATION TEST PASSES SEAMC TODD NOTIFIED. TWO C/BS OPENED, Dec 1, 2021 · N534AS · Boeing 737890 · Fire Protection System WiringSDR ASAA2021112136667Blade · damagedWHILE PERFORMING FAN BLADE LUBE ON THE #1 ENGINE MATED BLADES #10 AND 22 HAVE CHIPPED CU-NI-IN COATING OUTSIDE OF AREA X. REF B737-800 AMM 72-21-02-200-801-F00. GROUNDED - YES. REPLACED FAN BLADE #10 AND #22 ON ENG #1 REF T/C 78472010.Nov 21, 2021 · N534AS · Boeing 737890 · Turbine Engine Air Inlet SectionSDR ASAA2021110836552Unknown · unknownWINDOW HEAT OVERHEAT CAUTION L ILLUMINATED - INFO ONLY. GROUNDED - YES. INFO NOTED.Nov 8, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021110736546Unknown · unknownLEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED IN OGG. FOLLOWED QRH. WINDOW OVERHEAT WENT OUT. GROUNDED - YES. OPS CHECKS OK. REF WINDOW HEAT SYS OPS TEST B737-800 AMM 30-41-00.Nov 7, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021103136473O-Ring · damaged#2 ENG OIL CAP O-RING DAMAGED. GROUNDED - YES. REPLACED #2 ENGINE OIL CAP O-RING IAW B737-800 AMM 79-11-01. PERFORMED GROUND VERIFICATION RUN, FOUND NO LEAKS ,SEAMC JOE NOTIFIED.Oct 31, 2021 · N534AS · Boeing 737890 · Engine Oil Storage (Airframe Furnished)SDR ASAA2021101936343Probe · failed#2 MAIN TANK FUEL QUANTITY INDICATION SYSTEM FAILS CAPACITANCE TEST REF B737-800 AMM 28-41-00-730-801. TANK UNIT # 7 IS OUT IS ACCEPTABLE VALUES WHEN TEST ACCOMPLISHED. GROUNDED - YES. REMOVED AND REPLACED #2 MAIN TANK PROBE #7 REF B737-800 AMM 28-41-21. CAPACOct 19, 2021 · N534AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021101936342Probe · failed#1 MAIN TANK FUEL QTY SYSTEM FAILS CAPACITANCE TEST PER B737-800 AMM 28-41-00-730-801. TANK UNIT #1, #4, #6, #7 AND #9 ARE OUT OF ACCEPTABLE VALUES WHEN TEST ACCOMPLISHED. GROUNDED - YES. REMOVED AND REPLACED PROBES #1, #4, #5, #7, AND #9 REF B737-800 AMM 28-4Oct 19, 2021 · N534AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021101836344Unknown · unknownAT TAKEOFF, BOTH MAIN FUEL TANKS INDICATED FULL WITH ABOUT 8,500 PER SIDE. AT ABOUT 1 HOUR AFTER TAKEOFF, WE NOTICED THE LEFT FUEL TANK INDICATED 8.16 WHILE THE RIGHT TANK WAS STILL AT 8.5. WE DETERMINED BY QRH IT WAS NOT AN ENGINE FUEL LEAK. THE LEFT TANK WOUOct 18, 2021 · N534AS · Boeing 737890 · Fuel Indicating SystemSDR ASAA2021092936120Unknown · unknownPRIOR TO TAKEOFF HAD LEFT SIDE WINDOW HEAT OVERHEAT. GROUNDED - YES. DID QRH, LEFT SIDE WINDOW WORKS FINE, NO ISSUES.Sep 29, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021090835891Lamp · burned outL1 SLIDE LIGHT INOP. GROUNDED - YES. RELAMPED L1 SLIDE LIGHT REF B737-800 AMM 33-51-04 OP CK GOOD.Sep 8, 2021 · N534AS · Boeing 737890 · Emergency LightingSDR ASAA2021090235846Actuator · faultedLEFT PACK LIGHT ON RECALL - CANCELS ON RESET. GROUNDED - YES. REMOVED AND REPLACED L/H RAM AIR DOOR INLET ACTUATOR REF B737-800 AMM 21-51-21. OPS CHECK GOOD WITH NO FAULTS FOUND. GROUND VERIFICATION SUCCESSFUL .Sep 2, 2021 · N534AS · Boeing 737890 · Cabin Cooling SystemSDR ASAA2021062315144Heater · unknownLEFT FWD WINDOW HEAT INOP. GROUNDED - YES. ACCOMPLISHED WINDOW OPS CHECK OF CAPT'S WINDOW HEAT IAW B737-800 AMM 30-41-00 OPS CHECK OK.Jun 21, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021061435104Warning Message · false activationDURING CLIMB THROUGH FL 300 THE L-2 WINDOW OVERHEAT AMBER LIGHT CAME ON. RAN THE QRH PAGE 3.6 CHECKLIST AFTER THE 2-5 MIN WAIT THE OVERHEAT LIGHT CAME BACK ON. GROUNDED - YES. PERFORMED BITE TEST ON LEFT SIDE (L-2) WHCU, BITE TEST GOOD. PER B737-800 FIM 30-41 Jun 14, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021061035074Warning Message · false activationFLT CREW REPORTS NO 2 HF SHOWS FAIL ON COM PANEL. GROUNDED - YES. PERFORMED HF #1 AND #2 BITE PROCEDURE PER B737-800 FIM 21-11-00-810-801 OPS CHECK GOOD. FAIL LIGHT EXTINGUISHED.Jun 10, 2021 · N534AS · Boeing 737890 · HF Communications SystemSDR ASAA2021032934477Sensor · dirtyON PUSHBACK RECALL CONT CABIN ZONE TEMP ILLUMINATED. GROUNDED - YES. PERFORMED PZTC BITE IAW B737-800 FIM 21-62 TASK 801 FOR BOTH PZTCS. FLT DECK TRIM VALVE FAULT LIGHT ON BIT/PREV LEG, CLEAR AND RESETS ON VERIFY FOR NR 2 PZTC. NO FAULTS ON PZTC 1. RAN BOTHMar 29, 2021 · N534AS · Boeing 737890 · Cabin Temperature Control SystemSDR ASAA2021032734427Warning Light · false activationL SIDE OVERHEAT LIGHT ILLUMINATED AT FL330 APPROX 20 MIN AFTER TOC, TURNED WINDOW HEAT OFF 5 MIN LIGHT REMAINED EXTINGUISHED. GROUNDED - YES. WINDOW HEAT OPS TEST GOOD B737-800 AMM 30-41-00.Mar 27, 2021 · N534AS · Boeing 737890 · Windshield/Door Rain/Ice RemovalSDR ASAA2021022534206Starter · failed#1 ENGINE FAILED TO START DURING START SEQUENCE, START VALVE OPENED BUT NO N2. GROUNDED - YES. REMOVED & REPLACED FAULTY #1 ENGINE STARTER PER B737-800 AMM 80-11-01-400-801 OPS GOOD.Feb 25, 2021 · N534AS · Boeing 737890 · Engine CrankingSDR ASAA2020111233549Actuator · malfunctionedON CLIMBOUT LT PACK LITE ILLUMINATED, FOLLOWED QRH PACK LITE EXTINGUISHED WITH MASTER CAUTION RESET. TEMP CONTROL INOPERABLE. GROUNDED-YES. PERFORMED B737-800 FIM 21-53 TASK 820, THROUGH STEP F(3)(B), FAN BYPASS CHECK VALVE DOOR IS SATISFACTORY. PERFORMEDNov 12, 2020 · N534AS · Boeing 737890 · Cabin Cooling System
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