JASC 3420

Service difficulty reports · 772

Reports filed under 3420 · Attitude and Direction Data System, 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 jasc_code = '3420'
  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 CALA2026100520099Adiru · faultyIRS RT FAULT FOLLOWING FIM 34-21 TASK 803, PERFORMED BITE TEST AND FAULT MESSAGES ATTATCHED IN IMAGES. REMOVED AND REPLACED R ADIRU REF. AMM TASK 34-21-01-000-801 AND TASK 34-21-01-400-801. INSTALLATION TEST PASSED.PARTS USED: 60-3421-9-0001,QTY :1 POS - 2 MFGOct 3, 2026 · N27421 · Boeing 737924ERSDR QR9R2026082600002Ahrs · failedAHRS FAIL FLT 1. TEST FLIGHT EVAL FOUND AHRS DISC APPEARED MULTIPLE TIMES DURING A 0.2 HOVER FLIGHT. OTHER INDICATIONS WERE AS FOLLOWS: "Y","R", AND "P" IN AMBER ON BOTH PFDS, AND "ROLRAT DIS" ON LANE 2 SCROLL PAGE. ALL OTHER INDICATIONS APPEARED NORMAL WITH TAug 26, 2026 · Bolkms BK117C2SDR VNAA2026080422201Iru · unserviceablePITCH FEEL FAULT STATUS MSG IN FLIGHT AND YD2 INOP, FMS 2 DISPLAYED IRS REVERTED LOST FO'S PFD INDICATION C/A REMOVED AND REPLACED IRU 2 IAW CRJ900 AMM 34-45-01-000/400-801-A01.Aug 2, 2026 · N617NN · Cndair CL6002D24SDR YENA2026070900525Indicator · inoperativeFLT # 1177, BOS-LAS. (ETOPS) "FLT ATT DIRECT VIEW SYS INOP ( E-DIRECT VIEW SYSTEM )"Jul 7, 2026 · N2142J · Airbus A321271NXSDR 2026F00098Ahrs · failedFLIGHT OB139 VVI/CBB CANCELED FLIGHT. FAILURE DETECTED DURING PRE-FLIGHT: AHRS#1 FAILURE WITH RED FLAGS ON PFD #1May 6, 2026 · N418AW · Cndair CL6002B19SDR 2026FA0000307Isis · faultedISIS FAULT DURING TAXIApr 30, 2026 · N281AV · Airbus A320214SDR DXTA2026032407359Adc · faultedON TAKEOFF AT ROTATION AMBER 'BOTH ON ATT/HDG 2' PFD MSG DISPLAYED. IN CRUISE FLIGHT PILOT SIDE OUTBOARD GTC WAS ON HDG 2 WHEN HDG 1 SELECTED AMBER PFD MSG CLEARED. SHORTLY AFTER AMBER 'BOTH ON ADC2' PFD MSG DISPLAYED AND STAYED ON REMAINDER OF FLIGHT. RERACMar 22, 2026 · N874QS · Textrn TEXTRON700SDR 2A6R2026031675004Ehsi · wrong partDURING REINSTALLATION OF THE EHSI (ELECTRONIC HORIZONTAL SITUATION INDICATOR), THE INSTALLING TECHNICIAN NOTED THAT THE LOCKING TEETH RETAINER ON THE UNIT'S J3 CONNECTOR WOULD NOT LOCK AS EXPECTED WHEN CONNECTING THE AIRFRAME P3 D-SUB CONNECTOR. IT WAS ALSO NOMar 16, 2026 · N135LC · Urocop EC135T2SDR DXTA2026031207224Ahrs · failedAHRS 2 FAIL AT 32000', ACCOMPANIED BY AP FAIL AND YD FAIL. PFD 2 AUTO REVERTED TO AHRS 1. AFTER SEVERAL MINUTES AHRS 2 FAIL CAS CLEARED. POSSIBLY ASSOCIATED, AHRS 1 &2 FAULT CAS APPEARED DURING LANDING. CLEARED AFTER LANDING CORRECTIVE ACTION: PER EMBRAER CONTMar 11, 2026 · N386QS · Emb EMB505SDR SIMA202602110001Irs · failedIRS 1 FAILED WHEN ACTIVATING -DESCEND NOW- AT FL200 DECLARED EMERGENCY FOR AVONICS.MALFUTION. PERFORMED OPS CHKD OF IRS1 IAW AMM 34-26-00.NO FAULTS OBSERVED AT THIS TIME.OPS CHKD OKFeb 10, 2026 · N779RN · Emb ERJ170100SESDR AALA202601081069Deu · faultyAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: CAPTAIN SPEED TAPE AND ALTITUDE TAPE AND VVI BLANKED INFLIGHT WITH ALTITUDE AND SPEED ANNUNCIATED ALSO DISPLAY SOURCE 1 ILLUMINATED INFLIGHT. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT ORD. REMOVED AND REJan 6, 2026 · N936NN · Boeing 737823SDR COEA2025121206779Display · failedFLIGHT 4701 ENROUTE: GEG-PSC DURING FLIGHT, THE PRIMARY FLIGHT DISPLAY (G600), LEFT SIDE, FAILED. THE AIRCRAFT LANDED WITHOUT INCIDENT AND NO EMERGENCY WAS DECLARED. MAINTENANCE REPLACED THE GDU 620 DISPLAY UNIT. OPS CHECK GOOD.Dec 12, 2025 · N779FE · Cessna 208BSDR VNAA2025111711103Computer · unserviceableDURING CLIMB OUT, LEFT PFD ATTITUDE INDICATOR REMOVED, RED FD, ATT ,AND HDG FLAGS DISPLAYED ON PFD, ACCOMPANIED WITH AUTOPILOT DISCONNECT AND YD 1 INOPERATIVE AND PITCH FEEL FAULT STATUS MESSAGES. INTERROGATED MDC FOUND B1 CODE 005923 AND MULTIPLE OTHER ONES WNov 16, 2025 · N596NN · Cndair CL6002D24SDR SIMA20251022002Iru · faultedIRS 1 FAIL EMERGENCY DECLARED. RAR #1 MICRO IRU IAW ERJ AMM 34-26-01 OPS CHECK GOODOct 22, 2025 · N770JM · Emb ERJ170100LRSDR AJXA2025101500037Aoa · failedPILOTS ANGLE OF ATTACK FAILED. MAINTENANCE PERFORMED BIT TEST OF AOA COMPUTER AND COULD NOT DUPLICATE THE FAULT.AIRCRAFT WAS RETURNED TO SERVICE AND HASS COMPLETED SIX FLIGHTS WITHOUT ANY ADDITIONAL ISSUES.Oct 12, 2025 · N16PR · Cessna 750SDR ABXA20251011265Indicator · fluctuatesON INITIAL CLIMB FROM KCVG STATNDY ATTITUDE INDICATOR BECAME ERRACTIC AND UNRELIABLE AC RETURNED TO FIELD AND RETURNED TO BLOCKS ,MTX GROUNDED AC .MTX TROUBLE SHOT AND REMOVED AND REPLACED THE STBY INTEGRATED INDICATOR REF B767 AMM SUPPLEMENT 34-20-00. ALL OOct 11, 2025 · N220CY · Boeing 767383SDR 3EJA2025092200052Ahrs · failedAHRS 1 FAILED WHILE CLIMBING THROUGH 400 FT. TROUBLE SHOT SYSTEM. SWAPPED #1 AND #2 ECU AND POWERED AVIONICS. BOTH AHRS POWERED UP AND INITIALIZED AS REQUIRED. NO FAULT FOUND.Sep 17, 2025 · N782JS · Cessna 525BSDR CALA2025091608967Flag · false activationFO PFD DISPLAYING SPD AND ALT FLAGS TESTED RIGHT ADR SYSTEM REF. TO 34-21-00, TESTED GOOD.Sep 12, 2025 · N23707 · Boeing 737724SDR CALA2025091508917Eadi · faultedCAPT ADI BLURRED OUT AFTER REACHING CRUISE ALTITUDE PANEL INSTL-PILOTS MAIN (ELECTRONIC ATTITUDE DIRECTOR INDICATOR ONLY) REFERENCE: 34-22-03-02 ONE EACH IN IAD P# 622-5047-101 R/R CAPT ADI MULTICOLOR SCREEN REF. AMM 34-22-03. OPS CHECK GOOD.Sep 11, 2025 · N642UA · Boeing 767322SDR CALA2025081107583Indicator · faultedSTDBY ATTITUDE INDICATOR HAS FAILED REPLACED STANDBY ATTITUDE INDICATOR, OPS CHECK GOOD MM 34-22-24.APARTS USED: 31-4170-9-0001,QTY :1 ROTABLE PARTS CHG:TT # 1449521 SN OFF 2440 PN OFF 31-4170-9-0001 INDICATOR, STAN OFF 31-4170-9-0001 2440 ON 31-4170-9-0001 Aug 9, 2025 · N469UA · Airbus A320232SDR DALA2025060904362Isis · failedSHIP 3413 -DIV- TO BOS DUE TO ISIS (INTEGRATED STANDBY INSTRUMENT SYSTEM) FAILED. RESET ISIS. NO FAULTS FOUND. (7566088)Jun 7, 2025 · N413DX · Airbus A330941SDR 2025FA0000284Air Data Module · activeDURING A SEPT 16, 2024 FLIGHT IN RAINY CONDITIONS IN ALASKA, AT APPROXIMATELY 8:30PM, THE PIC OBSERVED THE ATTITUDE FLIGHT DISPLAY TUMBLE. THE PIC OBSERVED THIS HAPPEN IN DURING A FLIGHT IN SIMILAR CONDITIONS (RAIN) ON JULY 30, 2022, AT APPROXIMATELY 12:00 NOOApr 21, 2025 · N555BD · Cubcft CC19215SDR SWIA202503310001Warning Message · illuminatedON DECENT RECIEVED EFIS COMP MON WITH IAS ON BOTH PFDS RAN QRH AND MSGS PERSISTEDCAPT SIDE GOT AN IAS FLAG, PITCH AND ROLL FLAG. FO SIDE GOT AN IAS FLAG, PITCH AND ROLL AND ALTITUDE FLAG. CAPT SIDE WAS COMING BACK BUT FO STILL HAD ALL THE FLAGS. DIVERED TO LASMar 30, 2025 · N965SW · Cndair CL6002B19SDR CALA2025021802359Adiru · faultedIRS2 FAIL IN FLT REPLACED RH ADIRU REF AMM TASK 34-21-01-400-801, OP CHECKS GOOD, PERFORMED LAND TEST REF AMM 22-11-00, ALL TESTS PASSED, AIRCRAFT REMAINS FULL AUTOLAND CAPABLE PARTS USED: 60-3421-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 144481Feb 17, 2025 · N62894 · Boeing 737924ERSDR CALA2025012201969Adiru · faultedIN FLIGHT CA SIDE INSTRUMENTS FAILED. RAN THE DISPLAY FAIL FM DID NOT WORK. FOUND MAINTENANCE MESSAGE 34-21991. NOT ACTIVE. REALIGNED LEFT ADIRU PER AMM 34-21-00-820-803. ALL MESSAGES CLEARED. ACCOMPLISHED OPERATION CHECK OF THE ADIRU PER AMM TASK 34-21-00-71Jan 18, 2025 · N17335 · Boeing 7378SDR ABXA20241207246Iru · failedAFTER PUSHBACK R IRS ALIGN EICAS AND DISCRETE LIGHT ILLUMINATED. PERFORMED QUICK ALIGN AND STATUS DID NOT CHANGE. AIIRCRAFT RETURNED TO GATE. MAINTENANCE GROUNDED AIRCRAFT. TRIED NEW CENTER IRU, NO HELP. WAPPED RIGHT & CENTER SYMBOL GENERATOR, NO HELP. ALL UNIDec 7, 2024 · N1361A · Boeing 76731BSDR ABXA20241004184Iru · faultedDURING TAXI OUT EICAS MESSAGE R IRS FAULT AND DESCRETE CAME ON AC RETURNED TO THE GATE AND MTX GROUNDED AC .MTX DEFERRED THE R IRU IAW MEL ABX-34-21-1-1-2A. AND RETURNED AC TO SERVICE AND AC DEPARTED .Oct 4, 2024 · N1427A · Boeing 767306SDR QR9R2024091700001Ahrs · warning lightAHRS1 WARNING REPLACED PFD AND ND, MAINTENANCE RESET PERFORMED. HOVERED OUT TO DO POWER CHECK AND AHRS1 CAME UP AGAIN. REMOVED AND REPLACED AHRU; MOC SUCCESSFULLY COMPLETED.Sep 17, 2024 · Bolkms BK117C2SDR DXTA2024072600011Avionics Unit · brokenAVIONICS INTEGRATION (IAC, NIC PROC, MAU, GEA, IAPS): ON BASE LEG TO LANDING WE GOT AMBER X'S ON ENGINE, FUEL, FLAPS AND TRIM. ALONG WITH AN AURAL ALTTITUDE ALERT TONE. ALSO ALL THREE LANDING GEAR INDICATIONS TURNED RED AFTER THE BEFORE LANDING CHECK WAS COMPLJul 25, 2024 · N410QS · Emb EMB505SDR Q5QA20240627005Ahrs · malfunctionedDURING FLIGHT THE AHRS SYSTEM RESET WHILE ENCOUNTERING SEVERE TURBULENCE REQUIRING EMERGENCY ACTION. ALL SYSTEMS EVENTUALLY CAME BACK ONLINE AFTER EXITING THE TURBULENCE AND THE FLIGHT CONTINUED WITHOUT FURTHER ISSUE.Jun 26, 2024 · N412MD · Pilats PC1245SDR CALA2024040300962Indicator · faultedREF LP 7534725, INCORRRECT MEL USED FOR DEFERRAL. CANNOT MEL STBY ATT IND DUE TO CURRENT ROUTING WX CONDITIONS. MUST FIX. LOCKED TO CONFIRM FIX. UNLOCKING FOR SIGNOFF. ACCOMPLISHED FIM 34-24 TASK 801. NO FAULTS FOUND ON MMR. RESET STANDBY INDICATOR PER MM 34Apr 2, 2024 · N33203 · Boeing 737824SDR CALA2024011700131Adiru · intermittentAIRSPEED AND ALTITUDE DISAGREE IN FLT. CAPT SIDE WAS RELIABLE. CLEARED BELOW 7000 AGL. UNIT, ADIRU, AI OFF 29-3421-9-0010 5345 ON 29-3421-9-0010 6370 UNIT, ADIRU, AI OFF 29-3421-9-0010 5345 ON 0000 INSPECTED PITOT PROBES AND AOA VANE. NO DEFECTS FOUND. CHECKEDJan 14, 2024 · N15712 · Boeing 737724SDR G1IA20231030051Vertical Gyro · faultedDURING CRUISE FLIGHT, AIRCRAFT PITCHED NOSE DOWN AND BEGAN A ROLL TO THE RIGHT. LOOKING AT THE PILOT'S ATTITUDE INDICATOR, IT HAD ROLLED INVERTED THEN WENT BLANK.Oct 30, 2023 · N930MQ · Beech C90ASDR SWIA20230927004Unknown · unreliableEFIS COMP MON CAUTION INFLIGHT. ROLL PITCH HDG YELLOW FLAGS. HDG RED FLAGS DISPLAYED AS WELL. FOS HSI UNRELIABLE, CAS HSI UNRELIABLE AS WELL. QRH DID NOT FIX THE ISSUE, FLIGHT DIVERTED. GPS WAS ALSO UNRELIABLE. (FLIGHT 3112 FILED CLOSED)THIS DISCREPANCY WAS TRSep 24, 2023 · N750SK · Cndair CL6002C10SDR M17F20230906122Adiru · failedIRS FAULT 342 070 41Aug 9, 2023 · Boeing 737852SDR 2023FA0000377Ahrs · failedMONDAY 7/17/203, LEAR 60, N696RB DEPARTED KICT AND ON CLIMB THE CO PILOTS PFD DISPLAYED ERROR MESSAGES INDICATING THE AHRS (ATTITUDE REFERENCE HEADING SYSTEM) FAILED. THE CREW DECIDED TO RETURN TO KICT. BOMBARDIER MAINTENANCE CENTER WAS CONTACTED AND DETERMINEJul 17, 2023 · N696RB · Lear 60LEARSDR 4DPA2023042100001Computer · failedISSUE-CREW REPORTED SPS ADVANCE AND AHRS 2 FAIL MESSAGES. AP ALSO INOP IN FLIGHT. CORR ACTION- MX TROUBLESHOT THE ISSUE TO A BAD AHRS #2 COMPUTER. R&R'D AHRS COMPUTER ALL OPS TEST CHECKED GOOD.Apr 21, 2023 · N265JX · Emb EMB135ERSDR ASAA2023031542386Unknown · unknownON DEPARTURE SEATTLE WX RADAR ON SHOWED PWS INOP & TILT INHIBIT CLIMB CONTINUED WITH TCAS FAILURE,IRS L OUT, FLIGHT DIRECTOR CA SIDE WENT OUT, ON PFD LOWER COMPASS HAD NO NUMBERS, ON ND NO HEADING BUG IN HUD - NO GUIDANCE CUE OR FLIGHT DIRECTOR SYMBOL. GROUNDEMar 15, 2023 · N461AS · Boeing 737990ERSDR 7C7A2022122980051Adi · faulted#1 ADI ROLL AND #1 HSI HDG MISMATCHDec 28, 2022 · N151RA · Dhav DHC8311SDR SWAA2022110767873Adiru · failedLOST DATA ON CAPTAINS SIDE DISPLAY FAULT LEFT IRS NO 30DH / [01] R&R # 1 ADIRU PER AMM 34-21-01.OPS CHECK GOOD. AIRCRAFT RECERTIFIED TO CAT III STATUS PER MT 734-00-03. VERIFICATION#<BR>31952Nov 3, 2022 · N484WN · Boeing 7377H4SDR DXTA2022072066350Screw · shearedAFTER FRA I SWITCHED THE YAW DAMPER ON. THE FO THAT WAS PF SAID HE FELT THE RUDDERS MOVE STRANGELY AND WE RECEIVED AN AP YD FAIL MESSAGE. // SIGNOFF// PERFORMED LITEF LCR-100 HYBRID NAVIGATOR OPS CHECK. NO FAULTS FOUND. NOTIFIED MCC AND THEY ELECTED TO CHANGE Jul 19, 2022 · N507QS · Cessna 680ASDR 4EZF22071531ZVEfis · inoperativeDURING CRUISE FLIGHT FROM TNCC (CURACAO) TO TNCM (ST MAARTEN) CREW NOTICED A BURNING SMELL & NOTICED CO-PILOT'S TOP PFD BLANK. PFD CB POPPED. FLIGHT CREW DECIDED TO RETURN TO TNCC OUT OF SAFETY PRECAUTION. AFTER ARRIVAL MAINTENANCE DETERMINED THAT THE CO-PILOTJul 15, 2022 · N31ZV · Lear 31ASDR 9JLA2022071923497Ahrs · failedTHE FLIGHT CREW REPORTED THAT THE HEADING AND ATTITUDE ON PDF2 FAILED ON CLIMB OUT FROM AIRPORT. SELECTED HDG&ATT REV. AUTOPILOT WOULD NOT ENGAGE DUE TO LACK OF AHRS INPUT. THE BASE MAINTENANCE TEAM TROUBLESHOT AND FOUND THE NO2 AHRS HAD FAILED. IT WAS REMOVEDJul 11, 2022 · N827JN · Cessna 560XLSDR ASAA2022052438437Adiru · faultyL IRS NOT DISPLAYING ANY INFORMATION IN FLIGHT AT FL340. NOTE- POWER INTERRUPTION ON THE GROUND DUE TO AFTER START FLOW BEING DONE INCORRECTLY (APU OFF BEFORE ESTABLISHING ELECTRIC- GEN). RE-RAN CHECKLISTS, CHECKED C/B, AND DID NOT NOTE ANY ANOMALIES. GROUNDEDMay 24, 2022 · N440AS · Boeing 737990ERSDR HNAA2022052500178None · nonePDIS 626 25-00 2667912 18MAY22 RIC CLOSE FIRST OFFICER PFD GOES BLANK SEVERAL TIMES IN FLIGHT FACT 18MAY22 01:37 RIC R/R FO PDF IAW AMM 34-22-00/400-801A. OPS CHECK GOOD OK FOR SERVICE.May 18, 2022 · N626AE · Emb EMB145LRSDR ASAA2022022437579Unknown · unknownIFSD DISPLAYS OUT OF ORDER. GROUNDED - YES. AIR TURNBACK - DIVERSION TIME 83 MINUTES. T/S IAW B737-800 FIM 34-24 TASK 810. DETERMINED TO BE INTERMITTENT FAULT. PERFORMED ISFD OPS CHK IAW B737-800 AMM 34-24-02. OPS CHK OK.Feb 24, 2022 · N529AS · Boeing 737890SDR AALA202112158729Adiru · failedAIRCRAFT WAS NOT GROUNDED: INERTIAL REFERENCE SYSTEM FAILED ON APPROACH WITH LOSS OF VERTICAL GUIDANCE, FLIGHT DECLARED EMERGENCY AND PERFORMED A GO-AROUND. ACCOMPLISHED FUNCTIONAL TEST IAW AMM 34-21-00-710-801, OPS CHECK GOOD.Dec 11, 2021 · N324SH · Boeing 737*SDR ASAA2021101236277None · noneON CLIMB OUT FMC SHOWED IRS LEFT DRIFT IRS LEFT SIDE INCREASED TO 24 WITH VERIFY POS IRS/IRS. RT IRS FUNCTIONING NORMAL. GROUNDED - YES. DIVERSION TIME 25 MINUTES - REPLACED L/H ADIRU REF B737-800 AMM 34-21-01-400-801 OPENED & CLOSED 3 C/B'S OPS CK OK REF AMM Oct 12, 2021 · N558AS · Boeing 737890SDR MLJA20210000250Hsi · out of limitsUPON DEPARTURE THE HSI SHOWED 60 DEGREES OFF ACTUAL HEADING. RE-SLAVE ATTEMPT UNSUCCESSFUL. NOTIFIED ATC AND RETURNED TO FIELD. LANDED WITHOUT INCIDENT. RE-CENTERED HSI. OPERATIONAL CHECK SATISFACTORY.Aug 21, 2021 · N3284M · Cessna 310RSDR CALA2021081801367Adiru · failedIRU FAIL REMOVED AND REPLACED LEFT ADIRU PER AMM 34-21-01, ALL CHECKS GOOD. PERFORMED LAND VERIFY PER AMM 22-11-00-201 ALL TESTS PASSED AND COMPLETE, AIRCRAFT REMAINS FULL CAT CAPABLE. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1100643 SN OFF 3026 UNIT, ADIRU,Aug 18, 2021 · N79279 · Boeing 737824
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