N494AS
Service difficulty reports · 142
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 = 'N494AS' 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.
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 = 'N494AS' AND registry_match = 'registration' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR ASAA2021080235569Angle · corrodedFWD PIT FLOOR STRUCTURE, LOWER SUPPORT ASSY P/N 143A9485-35 (-37 SUPPORT) CORRODED AT STA, 500L BETWEEN LBL-24 AND RBL-24. MARKED DOT: H395. GROUNDED - YES. EVAL'D FWD PIT AFT BULKHEAD, ANGLE LOWER ASSY. FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS GIVEN. RSDR ASAA2021080235575Transition Panel · corrodedAFT CARGO COMPARTMENT L/H FLOOR SUPPORT TRANSITION ANGLE CORRODED FROM 7271 TO 847. GROUNDED - YES. EVALUATED AFT PIT 4H FLOOR SUPPORT TRANSITION ANGLE STA727I-STA847, FROM STA727I-STA727J+7: ORIGINAL THINK' .040" MAT REOMOVED .014" . REMAINING MAT .026" OUT OSDR ASAA2021080235574Transition Panel · corrodedAFT CARGO COMPARTMENT L/H FLOOR SUPPORT TRANSITION ANGLE CORRODED FROM 727B TO 727I. GROUNDED - YES. EVALUATION OF AFT CARGO COMPARTMENT L/H FLOOR SUPPORT TRANSITION ANGLE FROM 727B +727I, FROM STATION 727B TO 727H+7: ORIGINAL THICKNESS .040/MAT REMOVED .004"/SDR ASAA2021032334418Display · defectiveMCP IAS/MACH BOX HAS WHITE DOT ON AT ALL TIMES. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL IAW B737-900 AMM 22-11-34/401. JTHACH 31086 03/27/2021 ACCOMPLISHED DFCS LRU REPLACEMENT TEST FOR MCP REF AMM 22-11-34/501. ALL TESTS PASSED. ACCOMPLISSDR ASAA2021022434174Idg · leakingMAINTENANCE CONTROL REQUEST FOLLOW-UP TO NR 1 IDG FREQUENT SERVICING. GROUNDED - YES. REMOVED AND REPLACED NR 1 IDG. REF B737-900 AMM 24-11-11.SDR ASAA2020112535451Skin · dentedEXTENAL AC HOSE DENTED PORT SIDE OF A/C EXTERIOR REPORTED BY GROUND CREW GROUNDED - YES. EVALUATED DENT ON THE FUSELAGE SKIN AT STATION 500J, BETWEEN STR-21L AND STR-22L, W/Y=24.50 FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-01. CUT AND REMOVED DAMAGEDSDR ASAA2020103033459Filter · cloggedWHILE PERFORMING T/C N8349002 FOUND THE RED BUTTON ON THE APU OIL FILTER INDICATOR POPPED. GROUNDED-YES. REMOVED AND REPLACED APU OIL FILTER, REF B737-900 AMM 49-91-13-600-801 APU. OPERATIONS AND LEAK CHECK OK.SDR ASAA2020102533404Warning Light · false activationPRESSURIZATION AUTO FAIL LAMP ILLUMINATED AFTER LANDING. GROUNDED-YES. VERIFIED FAULT, NR 1 PRESSURE CONTROLLER SHOWS FAULT, MESSAGE OFV LRU FAIL, CLEARED FAULT. ACCOMPLISHED PRESSURE SYSTEM GROUND TEST ON BOTH PRESSURE CONTROLLERS BOTH PASS TEST, NO FAULSDR ASAA2020091733193Valve · failedNR 1 ENGINE HIGH STAGE VALVE FAILED BLEED AIR HEALTH CHECK, REF TASK CARD NG-36WC-00001 STEP 4.K.3 (C). GROUNDED-YES. REMOVED AND REPLACED NR 1 ENG HIGH STAGE VALVE, REF B737-900 AMM 36-11-06-000-801 AND AMM 36-11-06-400-801. OPS CHECK GOOD.SDR ASAA2020082193052Warning Light · false activationDESCENDING THRU 10,000' LEFT SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. RAN QRH AND WHEN COOLED 3 MIN, TURNED SWITCH ON AND NO OVERHEAT REST OF FLIGHT.SDR ASAA2020072192919Control Valve · faultedON TAKEOFF - #1 N1, IN FMC & SET PWR LEVEL ROSE BY 0.8% TO COMMAND 90.2% VS #2 N1 OF 89.4% TAKEOFF PERF DATA CALLED FOR 89.4% N1, FLAPS 5, ASSUMED TEMP 45* & ACTUAL TEMP OF 15* AT 24K POWER. #1 THRUST LEVER ALSO WAS DISPLACED 1/2" FWD OF #2 PWR LEVER. NOTICED SDR ASAA2020070232858Unknown · malfunctionedIN CRUISE FL380 RIGHT FMC FAILURE OCCURRED MOMENTARILY. FMC DID RESET ITSELF AFTER A FEW MOMENTS. GROUNDED - YES. VERIFIED LAST FLT RIGHT FMC FAILED. ACCOMP MMR NR 1 & NR 2 BITE TEST, TEST PASS REF FIM 31-31 TASK 801. ACCOMP FMC BITE REF FIM 34-61 TASK 80SDR ASAA2020062943840Sensor · faultedLEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED. WINDOW OPERATED NORMALLY. GROUNDED - YES. PERFORMED WINDOW HEAT CONTROLLER BITE (WHCU) IAW FIM 30-41, TASK 801, FAULTED THE L2 WINDOW SENSOR. ACCOMPLISHED FIM 30-41 TASK 811, MOVED WINDOW HEAT SENSOR TERMINAL TSDR ASAA2020062533837Warning Light · illuminatedLEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. VERBAL FROM FLIGHT CREW, FOLLOWED QRH, LIGHT EXTINGUISHED.SDR ASAA2020062432830Warning System · false activationLEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED IN FLIGHT. GROUNDED - YES. LIGHT EXTINGUISHED AFTER FOLLOWING THE QRH CHECKLIST.SDR ASAA2020061103789Hf Comm · unknownHF1 REPORTED AS WEAK AND UNREADABLE. SELCAL CHECK WORKED. HF2 WORKED GOOD. GROUNDED - YES. ACCOMPLISHED FIM 23-11 TASK 806 INITIAL EVALUATION. HF NR 1 TRANSCEIVER BITE, NO FAULTS. UNABLE TO RECEIVE HF1 OR HF2 ATC DUE TO AIRCRAFT PARKING. MADE SUCCESSFUL TRANSMSDR ASAA2020032432522Control Panel · failedWXR RANGE DISAGREE & FAILED TEST. GROUNDED - YES. PERFORMED WXR BITE TEST; -4, +2, +3 FAULT CODES SHOWN. RE-RACKED WXR R/T, AS PRECAUTIONARY, REMOVED AND REPLACED WXR CONTROL PANEL. OPS TEST GOOD. GROUND FUNCTIONAL TEST PASSED. REF B737-900 FIM 34-43 TASK 816 SDR ASAA2020030632364Unknown · malfunctionedWX RADAR PAINTING STRONG CONE-SHAPED RETURN IN CLEAR AIR. GROUNDED - YES. ACCOMPLISHED GVI EXTERNAL INSPECTION OF RADOME. NO DEFECTS NOTED. ACCOMPLISHED B737-900 FIM 34-43 TASK 801. OPS CK GOOD. ACCOMPLISHED WETHER RADAR SYSTEM OPERATIONAL TEST. OPS CK GOOD RESDR ASAA2020021203155Bleed Valve · faultyAIR CONDITIONING DUCT PRESSURE SPLIT GREATER THAN 20 PSI. CLIMB LEFT DUCT WAS 15 RIGHT DUCT WAS 45, CRUISE LEFT DUCT WAS 21 RIGHT DUCT WAS 45 . PRESSURIZATION WAS NORMAL . GROUNDED - YES. PERFORMED DUCT PRESSURE LOW ENGINE BLEED SOURCE B737-900 FIM TASK 36-10 SDR ASAA2020021063127Valve · failedAIR CONDITIONING DUCT PRESSURE SPLIT GREATER THAN 20 PSI IN CLIMB AND INITIAL CRUISE, LEFT DUCT 20 PSI VS RIGHT DUCT 43 PSI, AFTER 20 MINUTES IN CRUISE FLIGHT LEFT DUCT 23 PSI & RIGHT DUCT 40 PSI. GROUNDED - YES. ACCOMPLISHED BLEED AIR SYST HEALTH CK REF B737-SDR ASAA2020012281899Sensor · faultedLEFT PACK LIGHT ILLUMINATES ON RECALL AND EXTINGUISHES ON RESET. GROUNDED - YES. BITE OF LEFT PACK FLOW TEMP CONTROLLER PER B737-900 FIM 21-62 TASK 801 SHOWED FAULT 21-51246, PACK FLOW SENSOR. ACCOMPLISHED T/S FOR FAULT 21-51246 PER FIM 21-62 TASK 860, CLESDR ASAA2019123091723Heater · failedAFTER ENGINE START, TEMP PROBE LIGHT ILLUMINATED. GROUNDED - YES. REPLACED TAT, REF B737-900 AMM 34-21-06. TAT SYSTEM TEST NML PER SAME.SDR ASAA2019112431437Spacer · debondedWHILE ACCOMPLISHING T/C 78472010 FOUND SPACER 1,3,7,21,22 DISBONDED. GROUNDED - YES. REMOVED AND REPLACED #2 ENG FAN BLADE SPAERS 1,2,7,21, & 22.SDR ASAA2019103131215Warning System · false activationHF RADIO #2 "FAIL" ANNUNCIATED ON RADIO TUNING PANEL. GROUNDED - YES. CONFIRMED FAULT, HF RADIO #2 SHOWS "FAIL" ON RADIO TUNING PANEL. CYCLED AIRCRAFT POWER. PERFORMED HF COMMUNICATION SYSTEM - OPERATIONAL TEST REF B737-900 AMM 23-11-00-710-801 AND HF COMMUNICSDR ASAA2019101743121Connector · not seatedL CTR FUEL PUMP REMAINS ILLUMINATED WHEN SWITCH IS PLACED TO "ON" WITH FUEL IN CENTER TANK. GROUNDED - YES. REF B737-900 WDM 28-23-11 PGE 3 SHTS 1-4, VERFIED NO POWER AT R962 A2,B2,C2 AND X1. NO GND AT X2 OF SAME RELAY. FOUND AT J20 PANEL CONNECTOR D40858P NOTSDR ASAA2019062629881Start Valve · stickingREPORTS OF #2 ENGINE START VALVE IS SLOW TO OPEN OR STICKING. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE START VALVE REF AMM 80-11-03-400-801. REQUIRES PNEUMATIC LEAK CHECK. OPS CHECK GOOD.SDR ASAA2019062529878Hmu · failedREPEAT OF #2 "ENG VALVE CLOSED" LIGHT REMAINING BRIGHT BLUE AFTER ENGINE SHUT DOWN. GROUNDED - YES. DURING HPSOV SWITCH CHANGE FOUND FUEL IN DRY CAVITY OF #2 ENGINE HMU. REMOVED AND REPLACED HMU ON #2 ENG REF T/C N847300 AND T/C N8473001. OPS CHECK AND LEAK CHSDR ASAA2019061752971Control Valve · overheatedLEFT PACK LIGHT ILLUMINATES DURING RECALL. COMPLIED WITH QRH PROCEDURE AND LIGHT EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. RELEASED PER MEL 21-32B. LEFT HAND PACK TEMPERATURE CONTROL INOP. CONFIRMED FAULT, L/H PFTC BITE TEST SHOWS HARD FAIL TCV 1SDR ASAA2019052429477Unknown · malfunctionedHF 2 FAIL. GROUNDED - YES. REF HF COMM SYSTEM BITE FIM 23-11 TASK 801, HF SYSTEM AND OPS TEST AMM 23-11-00/501. ETOPS GROUND VERIFICATION GOOD, HF 2, OPS TEST GOOD.SDR ASAA2019050529253Switch · failedCA'S FWD WINDSHIELD HEAT (L1) OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. FOUND PRIMARY L-1 WINDOW SENSOR OPEN. PLACED SWITCH S1078 TO SPARE POSITION. SYS OPS CKS NML PER AMM 30-41-00.SDR ASAA2019042299079Warning Light · false activationL SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED DURING FLIGHT. OVERHEAT LIGHT REMAINED ON AFTER FOLLOWING CHECKLIST. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 30-41 TASK 801. NO FAULTS. PERFORMED GENERAL VISUAL INSPECTION OF WINDOW. NO DEFECTS NOTED. INSPECTED SSDR ASAA2019041979045Warning Light · false activationON RECALL AFTER ENG START CONT ZONE TEMP LIGHT ILLUMINATED. COMPLETED QRH LIGHT RESET ON MASTER CAUTION RESET. GROUNDED - YES. AIRCRAFT RELEASED PER MEL 21-21G PRIMARY CONTROL CABIN ZONE TEMP INOP. BOTH LT AND RT PACK FLOW TEMP CONTROLLERS PASS GRND BITE TEST.SDR ASAA2019040858914Apu · malfunctionedAPU FAILED TO START ON FIRST ATTEMPT. GROUNDED - YES. CHECKED AND RELEASED PER MEL 4-1B. APU INOP FAILED TO START ON FIRST ATTEMPT. SHOWED TWO MAINT MSG 49-41254 AND 49-61145. COMPLIED WITH MAINT PROCEDURES. APU OPERATIONAL TEST REF B737-900 AMM 49-11-00, OPS SDR ASAA2019021528196Warning System · false activationZONE TEMP OVERHEAD LIGHT ILLUMINATED ON RECALL. CONT CAB. GROUNDED - YES. RELEASED MEL 21-21G PRIMARY FLIGHT DECK TEMP CONTROLLER INOP. PERFORMED PACK FLOW TEMP CONTROLLER BITE TEST REF MM 21-61-00. NO FAULTS FOUNDS. ZONE TMP LIGHT REMAINS EXTINGUISHED WITH RESDR ASAA2019013128002Wire Harness · damagedWHILE ACCOMPLISHING TASK CARD; FOUND J10 HARNESS DAMAGE ON SHEATH OVER LIMITS. GROUNDED - YES. PERFORMED ALT. DEACTIVATION PROCEDURES PER CHAP 5, TABLE 3. REMOVED AND REPLACED J10 HARNESS. REVERSED ALT DEACTIVATION PROCEDURES. OPS TEST GOOD. REF AMM 73-21-06.SDR ASAA2018121327422Modulating Valve · failedCOCKPIT TEMPERATURE BECAME EXCESSIVE. TURNED OFF TRIM AIR SWITCH AND TEMPERATURE DROPPED TO 27 DEGREES SUPPLY DUCT TEMP. COULD SELECT HIGHER TEMP BUT NO COOLER THAN 27 DEGREES WAS COMFORTABLE. ALL OTHER TEMP ZONES OPERATED NORMALLY. GROUNDED - YES. REMOVED ANDSDR ASAA2018113027207Computer · unreliableFOLLOW-UP TO HISTORY OF RIGHT HAND FMC FAILURE. GROUNDED - YES. REPLACED LT FMC COMPUTER AS REQUESTED. VERIFIED SOFTWARE. OPS NML. GROUND VERIFICATION GOOD. REF AMM 34-61-02.SDR ASAA2018112927154Instrument Panel · malfunctionedIN CRUISE LNAV AND VNAV DISENGAGED AND WOULD NOT RE-ENGAGE FOR ABOUT ONE MINUTE. NO OTHER INDICATIONS OR FLAGS FMS, IRS AND GPS POSITION WERE ALL NORMAL. GROUNDED - YES. PERFORMED FMC BITE CKED L&R SENSOR INFLIGHT STATUS FAULT AND NO FAULTS NOTED REF B737-900 SDR ASAA2018112197023Warning Light · false activationDURING MASTER CAUTION RECALL CONTROL CABIN ZONE TEMP LIGHT ILLUMINATED. LIGHT EXTINGUISHED ON MASTER CAUTION RESET. GROUNDED - YES. PERFORMED CABIN TEMP CONTROLLER BITE TEST B737-900 AMM TASK 21-61-00-700-808-001. NO FAULT LOGGED.SDR ASAA2018111646860Fmc · false indicationVTK FLAG ON FO'S SIDE IN CRUISE. RESET ITSELF AFTER LESS THAN ONE MINUTE. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 836 & R/H FMC OPS NORMAL.SDR ASAA2018103126680Unknown · malfunctionedAFTER LANDING WHILE WAITING ON RAMP FMC VTK CYCLED LEFT SIDE CONTINUED WHILE SHUT DOWN AT GATE. GROUNDED - YES. UNABLE TO DUPLICATE DEFECT. ON ARRIVAL IN PDX, BOTH FMCS WERE OPERATING NORMALLY AND FMCS BITE PER FIM 34-61 TASK 801 SHOWED NO FAULTS LOGGED BY EITSDR ASAA2018101726479Unknown · malfunctionedCARGO FIRE FWD DOES NOT TEST PROPERLY. GROUNDED - YES. CARGO FIRE CONTROL PANEL TEST PASSES AT ALL DET SELECT SWITCH POSITIONS. PERFORMED B737-900 FIM 26-16 TASK 801 CARGO ELECTRONICS UNIT BITE PROCEDURE, NO FAULTS FOUND. CLEANED FWD CARGO COMPARTMENT A-LOOP SSDR ASAA2018100926423Sensor · failedRT SIDE WINDOW OVERHEAT ILLUMINATED ACCOMP QRH RT SIDE PWR SWITCH REMAINS OFF PER QRH. GROUNDED - YES. ACCOMPLISHED WHCU BITE PROCEDURE VERIFIED SENSOR FAIL ON NR 2 RIGHT SIDE WINDOW REF FIM 30-41 TASK 801. REMOVED NR 2 SLIDING WINDOW REF AMM 56-12-11-000-801.SDR ASAA2018100826404Warning System · false activationRIGHT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED PASSING 16500 FEET OAT APPROX 0 DEG C. OVERHEAT LIGHT REMAIN EXTINGUISHED AFTER 5 MINS CHECK IN QRH. GROUNDED - YES. WINDOW HEAT FUNC CK GOOD PER AMM 30-41-00.SDR ASAA2018073125584Indicator · failedCABIN DIFF VVI CONSTANT +300-400 DURING FLT CAB AH AND DIFF PSI REMAINED STEADY 7000 FT AND 7.6 PSI AT 350 FL. GROUNDED - YES. REMOVED AND REPLACED RATE OF CLIMB INDICATOR REF AMM 21-33-01 OPS CHECK GOOD, NO DEFECTS NOTED REF FIM TASK 21-61-00-740-8041-002.SDR ASAA2018061725084Fmc · faultedMULTIPLE FMC NR 1 FAILS WITH FMC FAIL AMBER PANEL LIGHT, ASSOCIATED VTK LIGHT & A/T LIM. GROUNDED - YES. REMOVED AND REPLACED LEFT FMC COMPUTER REF AMM 34-61-02. ACCOMPLISHED LEFT FMC COMP BITE PER FIM 34-61 TASK 801. NO FAULTS LOGGED ON LEFT NOR RT COMPUTERS.SDR ASAA2018061325063Unknown · malfunctionedVTK FLAG SHOWS ON CAPTAINS SIDE. INTERMITTENT LANDING ALT EXTINGUISH, FMC SELECTION GOES AWRY AND GND PROX INOP APPEARS. EVERY 5 MINUTES EVERYTHING RESTORES THEN FAILS AGAIN. GROUNDED - YES. PERFORMED FIM 34-61TASK 836. OPS GOOD. NO HISTORY LAST 30 DAYS.SDR ASAA201805144594Fmc · malfunctionedLEFT FMC ALERTED VTK ON LT MAP, BOTH CDU SCREENS WENT MENU. LNAV/VNAV DISCONNECTED, NO FMC FAILURE. THE FMC CAME BACK, BUT THERE WERE SEVERAL MORE VTK MESSAGES AFTER THE INITIAL ALERT. CONTINUED ON ONE FMC. ACFT GROUNDED. FFR FOR FLT 1 SHOWS FMC - L, PGM FAUSDR ASAA2018042824426Circuit Breaker · trippedWEATHER RADAR FAILED. ACFT GROUNDED. FOUND THE CIRCUIT BREAKER TRIPPED. RESET THE CRICUIT BREAKER REF B737-900 AMM TASK 20-60-01-860-801 . ACCOMPLISHED OPERATIONAL TEST REF AMM TASK 34-43-00-710-802-001. GROUND VERIFICATION COMPLETE. OPS CK OK. CHECKED A/CSDR ASAA2018040524167Starter · failedNR 2 ENGINE HAS NO ROTATION DURING START. NORMAL DUCT PRESSURE AND NR 1 ENGINE HAD NORMAL ROTATION. ACFT GROUNDED. REMOVED AND REPLACED THE NR 2 ENGINE STARTER IAW AMM 80-11-01, OPS CHECKED GOOD.
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