R/R LEFT ADC REF AIPC 34-12-01-61 & AMM 34-12-01-004-205. AIR DATA SYSTEM OPS CHECK NORMAL IAW AMM 34-12-00-715-001.
) - [SDR IPXA2026101554657](https://openairdocs.org/sdr/IPXA2026101554657.md): Adc · malfunctioned · Oct 14, 2026 · N431UP · Boeing 75724APF > ATB DUE TO CAPTAINS PFD BEING UNRELIABLE ALSO RECEIVED MACH TRIM AT RUDDER RATIO EICAS MESSAGE. FUEL 36.1 AFTER ATB. PERFORMED MCDP LAST FLIGHT FAULTS, HAD MULTIPLE FAULTS FOR L ADC AND COMPUTERS TALKING TO THE L ADC. T/S €ŒADC SYST LEFT€? PER FIM 22-02 TR - [SDR DXTA2026092209794](https://openairdocs.org/sdr/DXTA2026092209794.md): Adc · defective · Sep 19, 2026 · N268QS · Cndair CL6002B16 > TWICE DURING FLIGHT (ONCE ON CLIMB OUT AND ONCE ON DESCENT), LEFT PILOT LOST ALL AIRSPEED, ALTITUDE AND VERTICAL SPEED INDICATIONS, WITH ASSOCIATED RED FLAGS, LOSS OF AUTOPILOT, LOSS OF AUTO THROTTLE, AND MACH TRIM FAIL. DURING THE SECOND EVENT (ON DESCENT AT - [SDR QR9R2026091600002](https://openairdocs.org/sdr/QR9R2026091600002.md): Air Data Module · inaccurate · Sep 16, 2026 · Bolkms BK117C2 > RIGHT AIRSPEED INDICATOR INDICATED 30+ KNOTS CONSISTENTLY, ALL OTHER AIRSPEED INDICATORS INDICATED 0. MAINTENANCE ATTEMPTED TO CIRCULATE AIR THROUGH RIGHT PITOT TUBE WITH NO EFFECT. REMOVED AND REPLACED #2 ADU; OPERATIONAL CHECK SUCCESSFULLY COMPLETED. - [SDR AALA202609145096](https://openairdocs.org/sdr/AALA202609145096.md): Air Data Module · faulty · Sep 10, 2026 · N341SV · Boeing 7378 > AIRCRAFT WAS GROUNDED: DURING TAKEOFF ROLL AFTER 80 KTS WE HAD AN AIRSPEED UNRELIABLE. CAPTAIN AND STBY ISFD SPEED WERE AT 125 KTS, FO SPEED WAS STUCKAT 80 KTS AND THEN 40-45K DIFFERED FROM CAPT AND STND BY INDICATIONS. MAINTENANCE REMOVED AND REPLACED FO ADM - [SDR AALA202609148861](https://openairdocs.org/sdr/AALA202609148861.md): Air Data Module · faulted · Sep 10, 2026 · N341SV · Boeing 7378 > AIRCRAFT WAS GROUNDED: DURING TAKEOFF ROLL AFTER 80 KTS WE HAD AN AIRSPEED UNRELIABLE. CAPTAIN AND STBY ISFD SPEED WERE AT 125 KTS, FO SPEED WAS STUCKAT 80 KTS AND THEN 40-45K DIFFERED FROM CAPT AND STND BY INDICATIONS. MAINTENANCE REMOVED AND REPLACED CA ADM - [SDR QR9R2026091000002](https://openairdocs.org/sdr/QR9R2026091000002.md): Air Data Module · out of tolerance · Sep 10, 2026 · Bolkms BK117C2 > #2 ADC FAILURE INDICATION DURING TAKEOFF. TROUBLESHOOTING REVEALED #2 ADC TO BE OUT OF TOLERANCE. REMOVED AND REPLACED AIR DATA COMPUTER IAW AMM 34-11-00, 4-1. FUNCTIONAL TEST SUCCESSFULLY COMPLETED. - [SDR I5PA2026083068810](https://openairdocs.org/sdr/I5PA2026083068810.md): Adc · faulted · Aug 30, 2026 · N688SL · Boeing 757230 > ETOPS SIGNIFICANT REPORT, CAPT AND FO AIRSPEED INDICATION INOPERATIVE. REPLACED LT AND RT AIR DATA COMPUTERS IAW AMM. - [SDR A6WA202607208901](https://openairdocs.org/sdr/A6WA202607208901.md): Adc · malfunctioned · Jul 20, 2026 · N457AW · Cndair CL6002B19 > IN FLT A/P DISENGAGED, YAW 1 INOPERATIVE, ALT, VERT SPEED AND IAS INOP/FLAGGED, C/W QRH FLAGS CLEARED( SWITCHED TO #2 ADC), ALL INDICATIONS NORMAL. AIRCRAFT REMOVED FROM SERVICE. REF W/O 348209 W/C NUMBER 9 FOR THE REPLACEMENT OF ADC1 AND W/C #8 FOR REPLACE - [SDR DXTA2026072108896](https://openairdocs.org/sdr/DXTA2026072108896.md): Adc · defective · Jul 18, 2026 · N754QS · Bombdr BD1001A10 > DURING SHORT FLIGHT, JUST AFTER LEVELING OFF AT 12,000', AMBER EFIS MISCOMPARE AND ALT FLAG (ON PFD2) DISPLAYED. THE RIGHT, PFD2 DISPLAYED A 140' LOW DIFFERENCE COMPARED TO THE LEFT PFD1. BOTH MESSAGES DISAPPEARED ONCE WE STARTED OUR DESCENT. QRH PROCEDURE - [SDR AALA202607132429](https://openairdocs.org/sdr/AALA202607132429.md): Module · unreliable · Jul 10, 2026 · N961AN · Boeing 737823 > AIRCRAFT WAS GROUNDED: AIRSPEED UNRELIABLE INDICATIONS ON CAPTAINS SIDE. AIRSPEED INDICATIONS DROPPED TO APPROXIMATELY 190 KNOTS AT FL360 WITH AIRSPEED AURAL INDICATION. RAN CHECKLIST AND INDICATIONS RETURNED TONORMAL, BUT THIS OCCURRED THREE MORE TIMES. ADDI - [SDR UIEA2026070200567](https://openairdocs.org/sdr/UIEA2026070200567.md): Adc · faulted · Jul 2, 2026 · N476MC · Boeing 74747UF > LOSS OF RT ADC, AND RT AOA IN FLIGHT WITH C/B TRIPPED. R & R RIGHT ADC IAW AMM 34-12-01-401, REV 116 & IPC 34-12-01-01B, REC 92. IAW FIM TASK 34-12 TASK 869 IAW CMC MSG 34653. PERFORMED GRD TEST OF RIGHT ADC IAW AMM 34-12-00/501. ALL TEST PASSED. - [SDR 2026FA0000569](https://openairdocs.org/sdr/2026FA0000569.md): Adc · no test · Jun 23, 2026 · N853AT · Boeing 737436 > RIGHT ADC SELF TEST FAILED AMM 34-12-11 REV 103 - 25-MAR-2026. ADC WAS REPLACED AND OPERATIONAL TEST WAS PERFORMED BY AMM 34-12-01 REV. 103 - 25-MAR-2026. AIR DATA SYSTEM TEST WAS PERFORMED AMM 34-12-01 REV. 103 - 25-MAR-2026. THE EVENT OCCURRED ON 23TH JUNE - [SDR FDEA202605280647](https://openairdocs.org/sdr/FDEA202605280647.md): Adc · faulted · May 28, 2026 · N920FD · Boeing 75723A > ALTITUDE DISAGREE TWO TIMES DURING DESCENT. FO ALTIMETER MATCHED THE STANDBY AND WAS 400 FEET DIFFERENT THAN CAPTAINS AMM: 34-12-01-4 REMOVED AND REPLACED CAPTAINS ADC. GROUND TEST NORMAL. PARTS INPUT WRI 34-16/ 7188. AMM: 34-12-01-4 REMOVED AND R - [SDR IPXA2026042110711](https://openairdocs.org/sdr/IPXA2026042110711.md): Adc · faulty · Apr 21, 2026 · N436UP · Boeing 75724APF > EMERGENCY DECLARED, AIRSPEED UNRELIABLE INDICATIONS DURING CLIMBOUT. FLT CREW REPORTS AIRSPEED DROPPED OFF DURING CLIMB OUT. FOUND LT ADC FAULTING DUE TO LT & RT EEC EICAS MSG'S AND EEC FAULT CODES RELATING TO ADC FAULTS. R & R LT ADC WITH A SERVICEABLE UNIT - [SDR UIEA2026042000226](https://openairdocs.org/sdr/UIEA2026042000226.md): Adc · faulted · Apr 20, 2026 · N249BA · Boeing 747409 > CAPTAIN AIRSPEED DROPPED FROM 250 KNOTS TO MINIMUM ON CLIMBOUT. PERFORMED LEAK CHK OF CAPT'S AND FO'S PITOT STATIC SYS IAW IAW 34-11-00, VERIFIED AIRSPEED DROPPED 250 KNOTS AND CAME BACK TO NORMAL. R & R LH ADC AND REPEATED LK CHK, AIR SPEED STABLE AT 300 KNO - [SDR UIEA2026041400181](https://openairdocs.org/sdr/UIEA2026041400181.md): Adc · faulted · Apr 14, 2026 · N249BA · Boeing 747409 > CAPTAINS AIRSPEED INDICATION UNRELIABLE. FO INDICATION APPEARED TO BE NORMAL(LH AIR DATA COMPT FAILED. REMOVED & REPLACED REF LOG PAGES #2107407, 2107408,2107409 FOR FURTHER DETAILS
/LP 2107408 M3&4: R/R L ADC IAW AMM 34-12-01/401 REV 116. REF IPC 3 - [SDR HNAA2026040800277](https://openairdocs.org/sdr/HNAA2026040800277.md): Adc · abnormal · Apr 7, 2026 · N925AE · Emb EMB145LR > AMMENDED: ADC 1 FAIL W/SPS ADVANCED IN FLIGHT. FACT 08APR26 07:42 PHL RR ADC 1 COMPUTER IAW AMM 34-15-01. NO FAIL MSG PRESENT ON EICAS. OPS AND LEAK CHECK GOOD - [SDR N6WA2025032704](https://openairdocs.org/sdr/N6WA2025032704.md): Adc · faulted · Mar 26, 2026 · N503GJ · Cndair CL6002C11 > AIRSPEED, ALTITUDE, AND VSI FLUCTUATING ON F/O SIDE OF FLIGHT DECK. VSI INTERMITTENT RED V/S DISPLAY DURING STRAIGHT AND LEVEL CRUISE FLIGHT. REMOVED AND REPLACED ADC #1 IAW AMM 34-13-01. BUILT TEST GOOD. - [SDR IPXA2026032306832](https://openairdocs.org/sdr/IPXA2026032306832.md): Adc · warning message · Mar 21, 2026 · N580UP · Boeing 747428F > AIR TURN BACK, ADC RIGHT STATUS MESSAGE REMOVED AND REPLACED THE RIGHT ADC IAW AMM 34-12-01-401. OPS CHECK GOOD. - [SDR IPXA2026030541774](https://openairdocs.org/sdr/IPXA2026030541774.md): Adc · inoperative · Mar 5, 2026 · N466UP · Boeing 75724APF > AIR TURN BACK - UNRELIABLE AIRSPEED DURING CLIMB OUT. R&R L/H ADC, OPS CHECK GOOD IAW 757 AMM 34-12-01. WORK DONE BY CAT QUALIFIED MECHANIC. - [SDR UIEA2026022200065](https://openairdocs.org/sdr/UIEA2026022200065.md): Adc · faulted · Feb 22, 2026 · N493MC · Boeing 74747UF > ALT DISAGREE EICAS MSG LEVEL FLIGHT AT FL280 GREATER THAN 200' L 27760 R/R CAPT LH AIR DATA COMPUTER IAW AMM 34-12-01/401 AND IPC 25-71-31-01A. OPS CHECK GOOD
) - [SDR AALA202603064269](https://openairdocs.org/sdr/AALA202603064269.md): Air Data Module · faulty · Feb 17, 2026 · N335PH · Boeing 737823 > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: CAPTAINS PRIMARY FLIGHT DISPLAY (PFD) FLASHED INTERMITTENTLY SHORTLY AFTER TAKEOFF. BOTH AMBER SPEED AND ALTITUDE DISPLAYED ON CAPTAINS PFD. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DEN. - [SDR AALA202603061844](https://openairdocs.org/sdr/AALA202603061844.md): Adc · faulted · Feb 17, 2026 · N335PH · Boeing 737823 > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: CAPTAINS PRIMARY FLIGHT DISPLAY (PFD) FLASHED INTERMITTENTLY SHORTLY AFTER TAKEOFF. BOTH AMBER SPEED AND ALTITUDE DISPLAYED ON CAPTAINS PFD. ACFT AIR INTERRUPTED BACK & LANDED SAFELY AT DEN. CAPTA - [SDR HNAA2026020100107](https://openairdocs.org/sdr/HNAA2026020100107.md): Adc · failed · Feb 1, 2026 · N689EC · Emb EMB145LR > ADC 1 FAILED IN FLIGHT FACT 01FEB26 17:47 ALB R&R'D ADC1 AT POS 100 IAW EMB145 AMM 34-15-01. PERFORMED LEAK CHECK IAW AMM 34-13-00. OPS CHECK DONE IAW AMM 34-15-00, SYSTEM TESTED SERVICEABLE, OK FOR SERVICE. - [SDR UIEA2025122001354](https://openairdocs.org/sdr/UIEA2025122001354.md): Adc · faulted · Dec 19, 2025 · N430GT · Boeing 7474H6F > IAS DISAGREE EICAS MSG AFTER T/O & ALT DISAGREE EICAS MSG AT 7000 FT. REMOVED AND REPLACED L/H AIR DATA COMPUTER IAW AMM 34-12-01. PITOT STATIC LEAK CHK OK IAW AMM 34-11-00. ALTIMETER SYSTEM ACCURACY TEST OK IAW AMM 34-41-00. REMOVED AND REPLACED LEFT UPPER P - [SDR CALA2025122112274](https://openairdocs.org/sdr/CALA2025122112274.md): Adc · faulted · Dec 18, 2025 · N657UA · Boeing 767322 > IAS DISAGREE EICAS MSG. CAPT SIDE SHOWING.785 FO SIDE SHOWING. 815 AT 340 CREW VERBAL. STAND BY IND MATCHED F/O SIDE, CAPT ADC SWITCHED TO ALT AND SYS MATCHED. PERFORMED BITE TEST ON BOTH LEFT AND RIGHT ADC COMP. WITH NO FAULTS. REQ FURTHER T/S. REF FIM 34-1 - [SDR CALA2025112811570](https://openairdocs.org/sdr/CALA2025112811570.md): Adiru · faulty · Nov 25, 2025 · N75425 · Boeing 737924ER > FO SPEED AND ALTIMETER BLANK FO 10 SEC. CLIMB CRUISE AND DESCEN T RETRIEVED LST FLT LEG FAULT. FOUND MULTIPLE FAULTS RELATED TO NR 2 ADIRU. PERFORMED ADIRS BITE PER FIM 34-21/801 AND FOUND NO CURRENT FAULT CODES. CHECKED ADIRS LAST FLT FAULTS AND FOUND CODES - [SDR AALA202511265913](https://openairdocs.org/sdr/AALA202511265913.md): Adiru · faulted · Nov 25, 2025 · N165NN · Airbus A321231 > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT DUE TO AN AIR DATA FAULT MESSAGE. THE AIRCRAFT LANDED SAFELY AT CLT AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED THE NR 2 AIR DATA INERTIAL REFERENCE UNIT (AD - [SDR ABXA20251120304](https://openairdocs.org/sdr/ABXA20251120304.md): Adc · inoperative · Nov 20, 2025 · N226CY · Boeing 767383 > DURING CRUISE, LEFT ADC BECAME INOPERATIVE. FOLLOWED QRH, CA SWITCHED TO ADC ALT REMAINDER OF FLIGHT OK. AIRCRAFT DIVERTED TO MIA DUE TO RVSM RESTRICTIONS AND THERE WAS NOT ENOUGH FUEL TO GET TO CVG AT THE LOWER ALTITUDE. LEFT AIR DATA COMPUTER REPLACED IAW - [SDR HEEA202510240001](https://openairdocs.org/sdr/HEEA202510240001.md): Adc · inoperative · Oct 24, 2025 · N925PH · Skrsky S92A > NR 2 ADC FAIL IN CRUISE FLIGHT. PERFORMED APPROPRIATE CHECKLIST AND RETURNED TO HMAN. - [SDR CALA2025101610187](https://openairdocs.org/sdr/CALA2025101610187.md): Adr · faulted · Oct 13, 2025 · N844UA · Airbus A319131 > NAV ADR 1 FAULT LAND VERIFY REQUIRED CYCLED RELATED BREAKERS, RERACKED ADIRU 1 AND PERFORMED BITE TEST OF ADIRU AND IRU TWICE REF AMM 34-13-00-740 AND AMM 34-14-00-740-004 TEST PASSED ON BOTH ATTEMPTS AND TESTED ADIRU 2 AND 3 ALL TESTS PASSED VIEW PICTURES TAK - [SDR GTIA2025092939103](https://openairdocs.org/sdr/GTIA2025092939103.md): Adr · malfunctioned · Sep 26, 2025 · N622NK · Airbus A320232 > ADR 1 FAULT INCRUISE, PREFORMED OPS TEST IAW AMM 34-13-00 OPS CHECK GOOD NO FAULT MSGS MOC 69661 - [SDR IPXA2025092531819](https://openairdocs.org/sdr/IPXA2025092531819.md): Adc · malfunctioned · Sep 25, 2025 · N475UP · Boeing 75724APF > ATB, LOSS L AIR DATA DURING CLIMB-OUT AROUND 400FT. REMOVED AND REPLACED LEFT ADC PER AMM 34-12-01. OPS CHECK NORMAL. - [SDR QR9R2025091500001](https://openairdocs.org/sdr/QR9R2025091500001.md): Air Data Module · inaccurate · Sep 15, 2025 · Bolkms BK117C2 > COPILOT ALTIMETER HAS 80 FOOT ERROR. 30.15 READ IN KOLSMANN WINDOW WITH FIELD ELEVATION OF 301 SET. CURRENT ALTIMETER AT TIME OF CHECK WAS 30.07. REMOVED AND REPLACED #1 ADC IAW 34-11-00, 4-1. - [SDR HEEA202509120001](https://openairdocs.org/sdr/HEEA202509120001.md): Adc · inoperative · Sep 11, 2025 · N675P · Airbus H160B > AIR1 DATA FAIL DISPLAYED ON MASTER LIST DURING CRUISE FLIGHT. RTB HOUMA NORTH RAMP. BRIEFED PASSENGERS AND RELEASED AIRCRAFT TO MAINTENANCE. - [SDR IPXA2025080451310](https://openairdocs.org/sdr/IPXA2025080451310.md): Adc · inoperative · Aug 1, 2025 · N331UP · Boeing 76734AF > ***AIR TURN BACK*** AIRCRAFT DISPLAYED FLAP LIM & SPD LIM AT 255 KTS AND 3000 FT ON CLIMBOUT. FLAP LEVER WAS IN UP POSITION AND INDICATED UP ON FLAP INDICATOR. ++REPLACED R ADC IAW AMM 34-12-01. OPS CHECK SATISFACTORY PER AMM 34-12-00. RESEATED R SWC PER AMM - [SDR DXTA2025072204291](https://openairdocs.org/sdr/DXTA2025072204291.md): Adc · defective · Jul 18, 2025 · N777QS · Bombdr BD1001A10 > IN LEVEL FLIGHT AT 6000 FT GEAR & FLAPS UP SPEED 250 KTS. WE GOT AN AMBER ALT BOX MESSAGE ON BOTH PFD'S AND AN EFIS MISCOMPARE ICAS MESSAGE. LEFT ALT (6000) RIGHT ALT (5850) STBY ALT (5800) RAN QRH AVNC 02-5 EFIS MISCOMPARE B3 CODE TO FOLLOW B3-007890 NO ADC-2 - [SDR QR9R2025070300001](https://openairdocs.org/sdr/QR9R2025070300001.md): Air Data Module · inoperative · Jul 3, 2025 · Bolkms BK117C2 > VAR NR INOPERATIVE DURING START RUN-UP. REMOVED AND REPLACED AIR DATA UNIT IAW AMM 34-11-00, 4-1. TEST FLIGHT COMPLETED IAW MSM 05-60-00,6-1, CHECKS OK. - [SDR IPXA2025070212307](https://openairdocs.org/sdr/IPXA2025070212307.md): Adc · faulted · Jul 1, 2025 · N174UP · Airbus A300F4622R > ATB, DURING CRUISE @FL300 NAV ADC-PRED W/S DET FAULT. ALSA WEATHER FAIL. TRIED TO RESET IW SYSTEM RESET TABLE\ AOM NO EFFECT. ATB R&R TRANSMITTER RECEIVER UNIT (8SQ) IAW AMM 34-41-51/401. PERFORMED WEATHER RADAR SYSTEM TEST IAW 34-41-00/501 AND PASSED. NO DEF - [SDR YENA2025070200674](https://openairdocs.org/sdr/YENA2025070200674.md): Module · failed · Jun 29, 2025 · N729JB · Airbus A320232 > FLT#1962, PBI-LGA. (REJECTED TAKE OFF) F/O AIRSPEED INDICATOR STAGNATED INDICATION REJECTED TAKE OFF 60.70 KTS INDICATED ON CA SIDE; REMOVED AND REPLACED #2 AIR DATA MODULE IAW AMM 34-11-17, OPS CHECK NORMAL, RTO INSPECT. REQ, PITOT STATIC SYSTEM FUNCTIONAL - [SDR CALA2025063006104](https://openairdocs.org/sdr/CALA2025063006104.md): Module · faulted · Jun 26, 2025 · N54711 · Boeing 737724 > REJECTED T/O AROUND 90 KIAS USING AUTO BRAKES, FOR AIRSPEED DISAGREE F/O IND HAD DISAGR FLAGSVERBAL TURNOVER W/ PILOTS, F/O AIR SPEED STAYED MID 40S KNOTS WITH PILOT SIDE IS AT MID 90S KNOTS, F/O SAID BOTH EEC LIGHT CAME ON, PREFORMED QUICK VISUAL INSPECTION - [SDR HEEA202506200001](https://openairdocs.org/sdr/HEEA202506200001.md): Adc · inoperative · Jun 17, 2025 · N937PH · Skrsky S92A > #2 ADC FAILED IN FLIGHT. - [SDR FDEA202506100993](https://openairdocs.org/sdr/FDEA202506100993.md): Adc · inoperative · Jun 10, 2025 · N910FD · Boeing 757236 > ON DEPARTURE THE LEFT ADC FAILED GIVING ERRONEOUS AIRSPEED AND ALTITUDE INDICATIONS ALONG WITH MULTIPLE FLAGS. WE WERE IN CRITICAL PHASE OF FLIGHT SO IMMEDIATELY CHECKED THE RIGHT PFD AND STANDBY TO DETERMINE THEY WERE WORKING PROPERLY. SWITCHED THE LEFT A - [SDR DALA2025052704057](https://openairdocs.org/sdr/DALA2025052704057.md): Probe · fod · May 24, 2025 · N109DU · Airbus BD5001A10 > SHIP 8109 - ATB - DUE TO "EFIS MISCOMPARE" CAUTION MESSAGE WITH UNRELIABLE AIRSPEED. CORRECTIVE ACTION: FOUND INSECT DEBRIS IN AIR DATA SMART PROBE (ADSP) 2, REPLACED ADSP 2. (LP# 7054454) - [SDR DXTA2025051903487](https://openairdocs.org/sdr/DXTA2025051903487.md): Air Data Module · defective · May 14, 2025 · N439QS · Emb EMB505 > CAPTAIN ALTITUDE/AIRSPEED INDICATION: AFTER ROTATION, THE LEFT SIDE INDICATED AIR SPEED BECAME UNRELIABLE. THE SYSTEM ANNOUNCED A STALL. FOR THE REMAINDER OF THE FLIGHT, THE LEFT SIDE PFD SHOWED AMBER IAS WITH ZERO INDICATED AIRSPEED. THE RIGHT SIDE PFD - [SDR DXTA2025051603480](https://openairdocs.org/sdr/DXTA2025051603480.md): Air Data Module · faulted · May 13, 2025 · N439QS · Emb EMB505 > CAPTAIN ALTITUDE/AIRSPEED INDICATION: AFTER ROTATION, THE LEFT SIDE INDICATED AIR SPEED BECAME UNRELIABLE. THE SYSTEM ANNOUNCED A STALL. FOR THE REMAINDER OF THE FLIGHT, THE LEFT SIDE PFD SHOWED AMBER IAS WITH ZERO INDICATED AIRSPEED. THE RIGHT SIDE PFD - [SDR QR9R2025051200001](https://openairdocs.org/sdr/QR9R2025051200001.md): Air Data Module · failed · May 12, 2025 · Bolkms BK117C2 > DURING FLIGHT, LIMIT ILLUMINATED ALONG WITH VNE AMD THE WARNING GONG. ISOLATED THE ADU TO #1 AND THE CAUTION/WARNINGS/ADVISORIES WENT OUT. REMOVED AND REPLACED #2 ADU IAW AMM 34-11-00, 4-1. TEST FLIGHT COMPLETED, NO FAULTS NOTED. - [SDR DALA2025050503403](https://openairdocs.org/sdr/DALA2025050503403.md): Adr · inoperative · May 4, 2025 · N353NB · Airbus A319114 > ATO - AT 80 KNOTS DUE TO CAPTAIN'S AIRSPEED READING ZERO. SWAPPED ADIRU #1 AND #3. PLACED ADIRU #3 ON MEL. OK FOR SERVICE. LATER: REPLACED CAPTAIN'S PITOT PROBE (9DA1), ADIRU #1, AND LEFT ADM. ALL OPS CHECK GOOD. - [SDR DXTA2025043003258](https://openairdocs.org/sdr/DXTA2025043003258.md): Adc · faulted · Apr 28, 2025 · N645QS · Cessna 680A > DURING CLIMB BOTH ON ADC 2 MESSAGE DISPLAYED. COMPLIED WITH QRH. ALSO NOTED A SLIGHT RUDDER KICK PASING THROUGH 17,000'. REPEAT WRITEUP. REMOVED #1 ADC GDC7400 P/N 011-02337-01 S/N 1U6100073. INSTALLED CUSTOMER PROVIDED REPAIRED #1 ADC GDC 7400 P/N 011-02233 Next page: https://openairdocs.org/jasc/3417/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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 = '3417' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/jasc/3417/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.