JASC 3417

Service difficulty reports · 1,213

Reports filed under 3417 · Air Data Computer, newest first.

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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 = '3417'
  ORDER BY difficulty_date DESC"

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SDR VTZA97441Adc · failureIAD/LGA - FLT 6500 - DURING TAKEOFF AT 0650 HOURS ON 8-4-97, ABORTED TAKEOFF DUE TO NR 1 ADC FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 1 ADC, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVEAug 4, 1997 · N321UE · Jetair JETSTM4101SDR P5CA9701270Cadc · malfunctionedCAPTAINS ALTIMETER 900 FT LOW AT FL 370, STANDBY MODE NO HELP, MACH NR'S .4 LOW, TRUE AIRSPEED LOW 30 KNOTS, ALTERNATE STATIC SOURCE NO HELP. REMOVED AND REPLACED NR 1 CADC PER MAINTENANCE MANUAL 34-12-01 PAGE 401. OPERATIONAL CHECKED PER MAINTENANCE MANUAL Jul 2, 1997 · N3203Y · Boeing 747128SDR P5CA9701217Cadc · failedFIRST OFFICER'S ALTIMETER READS 300 FT HIGH AT 31,000 FEET, MACH METER READS .03 HIGH, AND IAS READS NORMAL. REPLACED CADC IAW MAINTENANCE MANUAL 34-12-01 PG 401, OPERATIONAL CHECK PER 34-12-00 PG 508-5.Jun 30, 1997 · N3203Y · Boeing 747128SDR COMA9760122Adc · failedTHE NR 2 ADC FAILED DURING FLIGHT. REPLACED THE NR 2 ADC.Jun 28, 1997 · N934CA · Cndair CL6002B19SDR 9712029621Wire · brokenNR 1 AIR DATA COMPUTER CIRCUIT BREAKER POPPED AFTER TAKEOFF. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPAIRED WIRE F2059A22, OPERATIONAL CHECK NORMAL.Jun 19, 1997 · N621NW · Doug DC932SDR 9712039621Relay · failedNR 1 AIR DATA COMPUTER CIRCUIT BREAKER POPPED AFTER TAKEOFF. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED RELAY R20-1001 AND CIRCUIT BREAKER B10-49, OPERATIONAL CHECK NORMAL.Jun 18, 1997 · N621NW · Doug DC932SDR CA970618009Cadc · intermittent(CAN) AIRCRAFT RETURNED TO GATE DUE TO CADC APPEARED TO FAIL. CIRCUIT BREAKER RESET AND FLAGS DISAPPEAR SLOWLY. CADC REPLACED AND AIRCRAFT RETURNED TO SERVICE.Jun 16, 1997 · Boeing 7372T2SDR 97UAL900458Cadc · leakingDIVERTED TO DEN DUE TO PROBLEMS WITH ALTIMETERS AND AIRSPEED INDICATORS. *S/D* FOUND NUMBER 1 CENTRAL AIR DATA COMPUTER LEAKING INTERNALLY ON THE STATIC SIDE. REPLACED COMPUTER, OPERATIONS CHECK NORMAL.Jun 15, 1997 · N7292U · Boeing 727222SDR 97ZZZM735Adc · failureFLT 6325 - DTW-IAD - DURING CRUISE, MADE AN SCHEDULED LANDING AT IAD WITH ONE DISCREPANCY WHICH WAS NR 1 AHRS FAILED ADN NR 2 ADC FAILED. AIRCRAFT WENT TO GATE AT IAD WITH NO FURTHER PROBLEMS. MX INSPECTED AND REMOVED AND REPLACED NR 1 AHRS AND NR 2 ADC, OPSJun 9, 1997 · N320UE · Jetair JETSTM4101SDR AU971128Adc · faulty(AUS) NO2 AIR DATA COMPUTER (ADC) FAILED. INVESTIGATION FOUND A DRY SOLDER JOINT ON A PIN CONNECTION AND THE HEAT SINK COMPOUND BETWEEN THE POWER DIODES AND THEIR INTERFACE WITH THE MODULE CIRCUIT CARD HAD DETERIORATED.May 27, 1997 · Boeing 727277SDR AU971142Adc · malfunction(AUS) NO2 AIR DATA COMPUTER (ADC) SUSPECT FAULTY. WORKSHOP INVESTIGATION COULD FIND NO FAULTS.May 26, 1997 · Boeing 73733ASDR CALA9700765Air Data Comp · inoperativeTHE FLAPS WOULD NOT EXTEND TO 40 DEGREES WHILE ON APPROACH. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE NR 1 AIR DATA COMPUTER WAS REMOVED AND REPLACED. NO DEFECTS WERE NOTED WITH AIRCRAFT IN FLIGHT MODE. THE FLAPS WERE CYCLED SEVERAL TIMES BETWEEN 30 AND 40May 21, 1997 · N69603 · Boeing 737524SDR 9709729855Adc · inoperativeAUTO-PILOT OSCILLATES IN CLIMB. AIRSPEED HOLD AND MACH HOLD INOPERATIVE. FLIGHT RETUNED TO PHX AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED NR 2 ADC AND LEAK CHECKED PER MM 34-10-0, OPERATIONAL CHECK OK.May 17, 1997 · N764NC · Doug DC951SDR P5CA9700516Cadc · failedIN CRUISE AT FLIGHT LEVEL 350, CAPTIAN AND FIRST OFFICER ALTITUDE DIFFERENCE GRADUALLY INCREASED FROM 100 FOOT TO 500 FOOT WITH CAPTAINS ALTIMETER HIGH. REPLACED NR 2 CADC PER BOEING M/M 34-12-01, OPERATIONAL CHECK AND LEAK CHECK NORMAL PER 34-11-00.May 9, 1997 · N857FT · Boeing 747132SDR P5CA9700511Cadc · malfunctionedNUMBER 1 AND NUMBER 3 INS TAS AND WIND DIRECTION BLANK AND/OR FLASHING MANY DIFFERENT TRUE AIR SPEEDS AND WIND DIRECTION AND SPEEDS. NUMBER 1 INS WOULD NOT NAVIGATE CORRECTLY. NUMBER 2 INS ERROR RATE 5 MILES PER HOUR. REPLACED NR 1 CADC PER MAINTENANCE MANUALApr 30, 1997 · N850FT · Boeing 747122SDR AU970820Transducer · intermittent(AUS) NO1 DIGITAL AIR DATA COMPUTER (DADC) FAULTY - FAULT TRACED TO INTERMITTENT OUTPUT SIGNAL DATA FROM THE STATIC PRESSURE TRANSDUCERApr 30, 1997 · Boeing 73733ASDR VTZA97253Air Data Comp · failedIAD/CLE - FLT 6594 - DURING CLIMB-OUT AT 1230 HOURS ON 4-25-97, EXPERIENCED A FAILURE OF THE NR 1 AIR DATA COMPUTER. AIRCRAFT RETURNED TO IAD. MAINTENANCE INSPECTED THE SYSTEM AND FOUND THE NR 1 ADC HAD FAILED. MAINTENANCE REMOVED AND REPLACED THE AIR DATA Apr 25, 1997 · N325UE · Jetair JETSTM4101SDR VTZA97248Air Data Comp · failedIAD/DTW - FLT 6428 - DURING CRUISE AT 1230 HOURS ON 4-24-97, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO NR 2 ADC FAILED IN-FLIGHT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 2 ADC, OPS CHECK OK. AIApr 24, 1997 · N303UE · Jetair JETSTM4101SDR BJNA970401Adc Connector · bentAT ALTITUDE, LOST MODE C, MACH TRIM GPWS, AND AUTOPILOT DISENGAGED. FOUND PIN 16 ON ADC BENT. CHECKED ARCING CONNECTOR AT ADC. RE-INSTALLED ADC ACCOMPLISHED SYSTEM TEST PER MM 34-12-11 AND FAR 43, APPENDIX F. (X)Apr 22, 1997 · N456TM · Boeing 7372H4SDR REXA97103Air Data Comp · failedABORTED TAKEOFF DUE TO NO AIRSPEED INDICATION. REMOVED AND REPLACED AIR DATA COMPUTER. (X)Apr 16, 1997 · N320PX · Saab SF340ASDR CA970428008Air Data Computr · intermittent(CAN) ON TAKEOFF ROLL CAPTAINS AND FIRST OFFICERS AIRSPEED INDICATORS HAD A DISCREPANCY OF 20 KNOTS. REPLACED PILOTS AIR DATA COMPUTER AND DID PITOT STATIC TEST.Apr 10, 1997 · Boeing 727217SDR 9707401148Air Data Comp · failedDURING TAKEOFF ROLL, THE CAPTAIN'S AIRSPEED INDICATOR READ ZERO WHILE THE COPILOT'S READ 120. ABORTED TAKEOFF. MAINTENANCE REPLACED THE AIR DATA COMPUTER.Apr 10, 1997 · N148US · Doug DC1040SDR VTZA97209Dadc · failedFLT 6215 - IAD-PVD - MADE AN UNSCHEDULED LANDING AT EWR DUE TO AIRSPEED COMPARATOR FLAG ILLUMINATED ON NR 1 DADC. AIRCRAFT WENT TO GATE AT EWR WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 1 DADC, OPS CHECK OK. AIRCRAFT WAS RELApr 1, 1997 · N313UE · Jetair JETSTM4101SDR VTZA97199Dadc · failedIAD/DAY - FLT 6290 - DURING CLIMB AT 1815 HRS ON 3-29-97, MADE AN UNSCHEDULED LANDING AT IAD DUE TO NR 2 DADC FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSP AND REMOVED AND REPLACED NR 2 DADC; OPS CHECK OK. AIRCRAFT WAS RELEASEDMar 29, 1997 · N326UE · Jetair JETSTM4101SDR GTIA9700255Air Data Comp · failedDTW - FLT 566 - CO-PILOT'S ALTIMETER NEEDLE OSCILLATES CONSTANTLY AT ALL ALTITUDES. FOUND NR 2 AIR DATA COMPUTER SERVO OUTPUTS BAD. REMOVED AND REPLACED NR 2 AIR DATA COMPUTER. SYSTEM OPERATIONAL AND LEAK CHECKS GOOD IAW DC-9 MM CH 34-12-0. (M)Mar 18, 1997 · N130NK · Doug DC941SDR GTIA9700254Air Data Comp · malfunctionedDTW - FLT 566 - WITH AUTO-PILOT ENGAGED, YOKE FLUTTERS BACK AND FORTH. FOUND NR 2 AIR DATA COMPUTER OUTPUTS BAD. REFERENCE MRR GTIA9700255 FOR REMOVAL AND REPLACEMENT OF NR 2 AIR DATA COMPUTER. SYSTEM OPS CHECK GOOD IAW DC-9 MM CHAPTER 22-10-0. (M)Mar 18, 1997 · N130NK · Doug DC941SDR GTIA9700248Connector · dirtyDTW - FLT 566 - AT 8000 FEET AUTO-PILOT PULSED AS F/O ALTIMETER OSCILLATED PLUS/MINUS 20. THIS CONTINUED UNTIL AUTOPILOT WAS DISENGAGED, YOKE ALSO PULSED. REMOVED AIR DATA COMPUTER, CLEANED CONNECTORS, REINSTALLED SAME, PERFORMED AIR DATA INSTRUMENT AND ALTIMar 15, 1997 · N130NK · Doug DC941SDR GTIA9700234Air Data Comp · malfunctionedYIP - REF DME NR 00127 (MRR NR 97-01-27-003/GTIA9700147). AUTOPILOT PORPOISES IN ALL FLIGHT MODES (CLIMB, CRUISE, DESCENT, STABILIZED FLIGHT). FUNCTIONAL CHECK PERFORMED IAW DC-9 MM 22-10-0. READ WIRING TO PITCH CHANNELS. REMOVED AND REPLACED AIR DATA COMPMar 14, 1997 · N947ML · Doug DC932SDR COMA9760060Air Data Sensor · malfunctionAOA HEAT CAUTION WARNING ON EICAS. REPLACED THE RT AIR DATA SENSOR CONTROL BOX.Mar 13, 1997 · N920CA · Cndair CL6002B19SDR AU970697Adc · faulty(AUS) NO1 AIR DATA COMPUTER FAILED. WORKSHOP INSPECTION FOUND THAT THE PITOT AND STATIC TRANSDUCERS FAILED THE CALIBRATION TEST BUT WERE NOT CONSIDERED TO BE THE CAUSE OF THE FAILURE. FURTHER INVESTIGATION FOUND A DRY SOLDER JOINT ON ONE OF THE DC POWER SUPPLYFeb 19, 1997 · Boeing 727277SDR RAIA970217Air Data Comp · failedSTL - FLT 7482 0 NR 1 AIR DATA DATA COMPUTER FAILED. MAINTENANCE REPLACED THE NR 1 AIR DATA COMPUTER. (M)Feb 12, 1997 · N555HK · Jetair JETSTM4101SDR 97UAL900109Gyro · failedSECONDARY ATTITUDE AIR DATA REFERENCE UNIT (SAARU) FAILURE TWO HOURS AFTER DEPARTING ORD EN ROUTE LHR. RETURNED TO ORD. SUPPLEMENTAL DATA UPDATE SAARU WAS REPLACED AND AIRCRAFT RETURNED TO SERVICE. INVESTIGATION BY MANUFACTURER REVEALED A FAILURE OF THE X GFeb 8, 1997 · N771UA · Boeing 777222SDR COMA9730008Adc · failedPILOT'S AIR SPEED INDICATION FAILED. REPLACED THE AIR DATA COMPUTER. PART TOTAL CYCLES, 18,369.Jan 27, 1997 · N358CA · Saab SF340ASDR VNAA9701002Dau · failedENCOUNTERED LOSS OF DAU NR 1, DAU NR 2 AND ADC. THIS RESULTED IN THE LOSS OF THE PRIMARY FLIGHT INSTRUMENTATION AND ENGINE INSTUMENTATION. ALSO, LOSS OF FMS. NOTIFIED ATC. ENTIRE SYSTEM RESET ITSELF WHILE RETURNING TO FIELD. PERFORMED NORMAL LANDING. MAIJan 3, 1997 · N441JS · Dorner DO328100SDR USAASB96272Air Data Comp · failedTPA - FLT 1425 - DURING CLIMB, THE FIRST OFFICERS AIRSPEED INDICATION FAILED AND THE FIRST OFFICERS ALTIMETER READING WAS VERY LOW. FLIGHT RETURNED TO FIELD AT TPA. NO EMERGENCY WAS DECLARED AND THE FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REDec 29, 1996 · N516AU · Boeing 7373B7SDR COMA9660236Adc · malfunctionALTITUDE ALERT AURAL WARNING ON DURING FLIGHT, WILL NOT TURN OFF. REPLACED THE NR 1 ADC.Dec 22, 1996 · N916CA · Cndair CL6002B19SDR EISA96283Adc · inoperativeF/O'S AIRSPEED AND ALTIMETER INTERMITTENTLY INOP. REMOVED AND REPLACED NR 2 AIR DATA COMPUTER. OPS CHECK NORMAL. (M)Dec 13, 1996 · N314NE · Boeing 727223SDR HALA96163Cadc · malfunctionedSEA - FLT 2025 - OVERSPEED WARNING ON TAKEOFF AT 90 KNOTS. ABORTED TAKEOFF. NO STICK SHAKER. PERFORMED AURAL WARNING CHECKS PER TAFI 31-51-00 PAGE 105. PERFORMED PITOT STATIC CHECKS. ALL SYSTEM CHECK NORMAL. REPLACED NR 1 CADC AS A PRECAUTIONARY. (M)Nov 21, 1996 · N119AA · Doug DC1010SDR MALA965205Air Data Comp · failedFLT 3281 - ON CLIMB-OUT FROM MSP, THE FLIGHT OFFICERS VSI SHOWED ZERO. DURING DESCENTS, THE SYSTEM OPERATED NORMALLY. THE AIRCRAFT RETURNED TO MSP. MAINTENANCE REPLACED THE NR 2 ADC. ALL CHECKS SATISFACTORY. (M)Nov 16, 1996 · N802MA · Dhav DHC8102SDR WRLA96049Adc · malfunctionedDURING APPROACH AT SAEZ, FLT CREW ENCOUNTERED MULTIPLE FAULTS (ENGINES NR 1, 2, AND 3 SELECT FADEC ALTERNATE LEVEL 2, SELECT ELEVATOR FEEL MAN, SELECT FLAP LIMIT OVERRIDE, WINDSHEAR DETECTION FAIL). A/C WAS ENCOUNTERING HEAVY TURBULENCE WITH HEAVY PRECIPITATINov 6, 1996 · N271WA · Doug MD11SDR SWAA961212Dadc · failedAFTER TAKEOFF, F/O'S AIRSPEED AND ALTIMETER INDICATORS BECAME INOPERATIVE. AIRCRAFT RETURNED TO STL AND MADE AN UNEVENTFUL LANDING. REPLACED DIGITAL AIR DATA COMPUTER PER BOEING M/M.Nov 3, 1996 · N677SW · Boeing 7373A4SDR CALA9601341Air Data Comp · contaminatedTHE ACFT EXPERIENCED INTERMITTENT ROLL OF NO MORE THAN 10 DEGREES UNCOMMANDED WITH BOTH AUTOPILOT A ANDB SELECTED WHILE EN ROUTE. PITCH MODE FUNCTIONED NORMALLY. MAINTENANCE PERFORMED A GROUND TEST OF BOTH AUTOPILOT SYSTEMS. THE A-SYSTEM WAS TOTALLY INOPERASep 27, 1996 · N73243 · Boeing 7372C0SDR COMA9660144Adc · failedPILOTS ALTIMETER AND VERTICAL SPEED INDICATORS FAILED. REPLACED THE NR 1 AIR DATA COMPUTER.Sep 17, 1996 · N929CA · Cndair CL6002B19SDR VTZA96342Dadc · failedFLT NR 6217 - IAD-PVD - UNSCHEDULED LANDING DUE TO CAPTAINS ALT LAGS BEHIND FLIGHT OFFICERS. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED DADC. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE.Sep 1, 1996 · N326UE · Jetair JETSTM4101SDR VNAA9608004Air Data Comp · defectiveDURING THE TAKEOFF ROLL, CREW REPORTED BEING ALERTED BY A FLIGHT GUIDANCE COMPUTER FAIL CAS MESSAGE. CREW ABORTED THE TAKEOFF AND RETURNED TO THE GATE. MX REPLACED THE NR 2 MINI AIR DATA COMPUTER IAW MM 34-11-01, GROUND CHECKED GOOD.Aug 17, 1996 · N426JS · Dorner DO328100SDR RAIA960809Air Data Comp · looseJFK - FLT 7663 - CAPTAIN'S ALTIMETER STICKING, ONLY INCREASES IN 200 FOOT INCREMENTS. MAINTENANCE RE-RACKED THE NR 1 AIR DATA COMPUTER. (X)Aug 11, 1996 · N563HK · Jetair JETSTM4101SDR VTZA96298Connector · looseLYH/IAD - FLT 6186 - DURING CLIMB AT 0935 HRS ON 8-11-96, MADE AN UNSCHEDULED LANDING DUE TO NR 1 EADI AIRSPEED INDICATOR INOP. AIRCRAFT RETURNED TO THE GATE, NO FURTHER INCIDENTS. MAINTENANCE RESECURED LOOSE CONNECTOR ON NR 1 ADC, OPS CHECK OK. AIRCRAFT WAAug 10, 1996 · N305UE · Jetair JETSTM4101SDR SWAA960815Adc · malfunctionedAFTER TAKEOFF, CAPT AIRSPEED INDICATOR ROLLED BACK CAUSING STALL AND WINDSHEAR WARNING. AIRSPEED THEN WENT TO MAX SCALE WITH STICK SHAKER ACTIVATION. AIRCRAFT RETUNED TO PHX AND MADE AN UNEVENTFUL LANDING. INSPECTED AND REPLACED CAPT ADC, PERFORMED PITOT SAug 10, 1996 · N672SW · Boeing 7373Q8SDR CA960826088Cadc · intermittent(CAN) TAKEOFF REJECTED DUE TO FAILURE OF CAPTAINS ASI AND ALTIMETER. CADC REPLACED.Aug 10, 1996 · Boeing 7272J4SDR MZZA96062Adc · malfunctionedMNL - FLT 876 - NR 1 AND NR 2 GPS SHOW EXCESSIVE WINDS, 120 AT 215 KNOTS, TAS SHOWS 123 KNOTS AT ALL ATTITUDES. TAS INPUT FAILURE INDICATED ON NR 1 GPS. BOTH GPS UNRELIABLE. RETURNED TO MNL. REPLACED NPU NR 1 AND ADC NR 1 AND NR 2. OPS CHECK PER MM 34-12-Aug 9, 1996 · N623DH · Boeing 727264
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