Allison 250-C47B
Service difficulty reports · 1,403
Newest first. General aviation reporting is voluntary.
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 engine_model_key = '250C47B' 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 engine_model_key = '250C47B' 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 HEEA064915Scroll · damagedENGINE REMOVED DUE TO F.O.D., LOUD NOISE. SCROLL HAS INDICATIONS IN WELDS OF TURNING VANES.SDR HEEA064916Vane · crackedSCROLL HAD CRACKED TURNING VANE.SDR CA991028060Connector · failed(CAN) ITEM SENT FOR TRANSLATION. ONE TIME FAILURE IND NR 3 AND AND 8 RESTART SYSTEM. HUMIDITY WITHIN CONNECTOR SPECIFIED TO BE THE PROBLEM ASSOCIATED TO THE WRONG INDICATION ON THE CIT THAT CAUSED THE FIXED FAIL OF THE FADEC.SDR CA991104013Scroll · cracked(CAN) BRAIDED REINFORCED AREA OF SCROLL FOUND CRACKED. REINFORCEMENT AREA OF SCROLL FOUND CRACKED. REINFORCEMENT AREA ALSO DELAMINATED. THESE ITEMS PRESENTLY BEING ACTIONED BY ALLISON.SDR HEEA064700Indicator · weakBYPASS VALVE INDICATOR BUTTON WEAK.SDR HEEA064682Filter · contaminatedMETAL IN OIL.SDR CA991028072Disc Pack · cracked(CAN) NR 7 THOMAS COUPLING DISC WAS FOUND CRACKED (BOTH FRONT AND BACK SEGMENTS WERE BROKEN).SDR 99ZZZX4078Bearing · failedDURING STRAIGHT AND LEVEL FLIGHT AT 3,700 FEET, TWO SHARP VIBRATIONS, EACH LASTING TWO SECONDS, APPROXIMATELY ONE SECOND APART WERE FELT IN THE AIRFRAME. A PRECAUTIONARY LANDING AT NEAREST PLATFORM WAS ACCOMPLISHED. DURING POST-FLIGHT INSPECTION, NOTICED INDISDR HEEA064336Connector · damagedSEVERAL PINHOLES ON CONNECTOR ARE CHIPPED AND ELONGATED. REFERENCE: DMR NR 686305.SDR CA990907046Vane · cracked(CAN) THE LEADING EDGE OF THE COMPRESSOR SCROLL TURNING VANE EXHIBITS A CRACK 1 INCH PARALLEL TO AND .5 INCH FROM THE LEADING EDGE.SDR CA990907047Vane · broken(CAN) THE LEADING EDGE OF THE COMPRESSOR TURNING VANE BROKE AWAY .1 INCH BY .5 INCH.SDR CA991004022Cable · broken(CAN) CARGO HOOK EMERGENCY RELEASE CABLE BROKE. SUSPECT OUTER SHEATH BROKE FIRST AND THEN INNER CABLE BROKE. IT IS THOUGHT THAT CABLE WAS TOO SHORT. PART SENT TO MANUFACTURER FOR EVALUATION.SDR 99ZZZX4402Bearing · making metalENGINE CHIP LIGHT CAME ON. CHIP PLUGS INSPECTED AND FOUND EXCESSIVE METAL PARTICLES ON BOTH PLUGS. FERRY PERMIT WAS ISSUED BY FSDO FOR FLIGHT FROM MANCHESTER, IA TO CEDAR RAPIDS, IA. ENGINE WAS REMOVED AND SENT IN FOR REPAIR. CAUSE UNKNOWN.SDR 99ZZZX4562Ecu · failedTHE ECU, SN JG7ALK0380 FAILED AND WENT INTO THE MANUAL MODE. ATTEMPTS WERE MADE TO DOWNLOAD INFORMATION FROM THE ECU WITH NO RESULTS. REMOVED THE DEFECTIVE ECU. INSTALLED SERVICEABLE ECU. GROUND RAN AIRCRAFT. ALL SYSTEMS FUNCTIONALLY CHECKED OK. GROUNDEDSDR CA990818004Vain · separated(CAN) A PIECE OF COMPRESSOR SCROLL TURNING VANE SEPARATED FROM LEFT ENGINE, A CRACK WAS ALSO FOUND ON RIGHT HAND TURNING VANE. FAA MADE AWARE OF THE PROBLEM THROUGH ALLISON ROLLS ROYCE.SDR CA990907004Vane · cracked(CAN) FAILED COMPRESSOR SCROLL TURNING VANES REPORTED PREVIOUSLY, THE CAUSE OF THIS INCIDENT WAS A FAILED SCROLL 70 HRS POST REPAIR.SDR HEEA062887Hmu · malfunctionedRESTART FAULT AND FADEC DEGRADE LIGHTS ILLUMINATED ON SHUTDOWN. REPLACED WITH SERVICEABLE PART.SDR HEEA062888Hmu · failedHMU FAILED DRIVE SHAFT BACKLASH CHECK. REPLACED WITH SERVICEABLE PART.SDR 99ZZZX3087Bleed Valve · loosePILOT REPORTED 40 DEGREE HIGHER TEMPERATURE THAN NORMAL CAUSING LOW POWER TREND READINGS AND CRUISE FLIGHT TEMP EXCEEDING GREEN ARC. INSPECTION REVEALED HOUSING LOOSE DUE TO MOUNTING BOLTS LOSING TORQUE.SDR HEEA062834Sensor · failedN2 SENSOR CAUSING FADEC DEGRADE LIGHT. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062836Transducer · malfunctionedTRANSDUCER CAUSED FADEC DEGRADE LIGHT TO ILLUMINATE. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062837Filter · cloggedENGINE OIL FILTER BYPASS BUTTON POPPED AFTER RESETTING TWICE. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062838Filter · cloggedENGINE OIL FILTER BYPASS BUTTON POPPED. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062839Filter · cloggedENGINE OIL FILTER BYPASS INDICATOR EXTENDED. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062840Filter · cloggedENGINE OIL FILTER BYPASS INDICATOR EXTENDED. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062841Ignitor Box · failedDIFFICULT TO START ENGINE. REPLACED WITH SERVICEABLE ASSY.SDR HEEA062842Harness · failedHARNESS CAUSING FADEC DEGRADE AND RESTART FAULT LIGHTS. REPLACED WITH SERVICEABLE ASSY.SDR HEEA061767Harness · failedFADEC DEGRADE AND RESTART FAULT LIGHTS ON. REPLACED WITH SERVICEABLE HARNESS.SDR HEEA061768Harness · failedFADEC DEGRADE LIGHT ON AFTER SHUTDOWN. COMPUTER SHOWED TORQUE TRANSMITTER PROBLEM FOUND IN FADEC HARNESS. REPLACED WITH SERVICEABLE HARNESS.SDR HEEA061769Harness · failedAPPROXIMATELY 55 MINUTES INTO FLIGHT, FADEC HAD NPQ EXCEEDENCE. ECU AND HMU REPLACED 9-13-98. REPLACED WITH SERVICEABLE HARNESS.SDR HEEA061547Filter · malfunctionedBYPASS BUTTON POPPED.SDR 99ZZZX414Bolt · stretchedUPON DISASSEMBLY OF ENGINE FOR METAL, CHECKED BOLT TIGHTNESS BY MOVING COVER AND BODY ASSY. ACTUAL TORQUE ON BOLTS WAS ONLY 15 INCHES/POUNDS. THREE EACH BLEED VALVE COVER BOLTS WERE NOT TORQUED TO SPECS FROM FACTORY OR BOLTS ARE STRETCHING AFTER ASSEMBLY ANDSDR 99ZZZX408Bearing · galledUPON INSPECTION OF BEARING (AFT) PTO GEAR FOUND WITH EXCESSIVE GALLING ON ONE BALL BEARING. SUBMITTER STATED POSSIBLE CAUSE FOR BEARING GALLING UNKNOWN.SDR 99ZZZX416Line · cloggedUPON DISASSEMBLY OF GEARBOX, FOUND EXCESSIVE AMOUNTS OF SPLIT LINE SEALANT ON SPLIT LINE. NOTE: BEFORE DISASSEMBLY, FOUND ALOT OF SEALANT ALONG SPLIT LINE, OUTSIDE OF GEARBOX. UPON INSPECTION OF GEARBOX PARTS, FOUND SCAVENGE OIL TRANSFER TUBE NR 23004230 BLSDR 99ZZZX415Gear · galledENGINE WAS REMOVED FOR METAL CHIPS ON UPPER AND LOWER CHIP PLUGS. UPON INSPECTION OF GEARBOX PARTS, FOUND PINION GEAR GALLING AND TORQUE METER GEAR SPALLING. NOTE: METAL CONTAMINATION CAUSED DAMAGE TO OTHER PARTS IN GEARBOX. SUBMITTER SUGGESTED IMPROPER MESDR 99ZZZX411Journal · making metalUPON DISASSEMBLY OF GEARBOX, TORQUE METER SUPPORT JOURNAL WAS FOUND TO HAVE MAGNESIUM SLIVERS IN JOURNAL BORE. UPON FINDING MAGNESIUM SLIVERS IN TORQUE METER JOURNAL BORE, MEASURED JOURNAL AND FOUND IT TO BE OVER MFG SPECS 2.485 INCHES (MFG MAX LIMIT 2.480 INSDR 99ZZZX487Gear · making metalENGINE WAS REMOVED FOR TIME CHANGE TURBINE AND COMPRESSOR. UPON INSPECTION OF CHIP PLUGS, FOUND METAL CHIPS. DISASSEMBLED AND FOUND TORQUE METER GEAR AND PINION GEAR GALLING CAUSING SOME METAL CONTAMINATION DAMAGE TO THE PARTS. IMPROPER MESHING BETWEEN TORQSDR 99ZZZX689Exciter · inoperativeEXCITER INOPERATIVE. ENGINE FAILED TO START. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR 98ZZZX4742Gear · galledENGINE MADE CHIP LIGHT. UPON DISASSSEMBLY AND INSPECTION OF PARTS, FOUND EXCESSIVE GALLING ON PINION GEAR AND T/M GEAR. PINION GEAR HAS EXCESSIVE GALLING ON GEAR TEETH, POSSIBLY DUE TO IMPROPER MESHING OF T/M AND PINION GEARS. SECONDARY DAMAGE: T/M GEAR P/SDR HEEA0016127Valve · failedREPAIR DUE TO OIL TEMPERATURE EXCEEDED 120 DEGREES. CAUSE FOR OIL TEMP - OIL TEMP THERMAL VALVE P/N 724155, S/N 6056.SDR HEEA0016128Engine · making metalREPAIR DUE TO ENGINE OIL PRESSURE DROPPED TO ZERO AND METAL IN OIL. CAUSE FOR LOSS OF OIL PRESSURE - A CRACKED SLEEVE ON AIRCRAFT LINE P/N 407-062-532-01.SDR HEEA0015900Hmu · failedHMU WOULD NOT GO TO IDLE.SDR HEEA0015671Fadec Horn · weakFADEC FAIL HORN AUDIO EXTREMELY WEAK.SDR HEEA0015530Filter · cloggedFOUND OIL FILTER BYPASS INDICATIONS. SCRAPPED OIL FILTER.SDR HEEA0015531Filter · cloggedSCAVENGE OIL FITLER BYPASS INDICATION. SCRAPPED OIL FILTER.SDR HEEA0015532Filter · cloggedFOUND OIL FILTER BYPASS BUTTON POPPED ON DAILY INSPECTION. SCRAPPED OIL FILTER.SDR HEEA0015533Filter · cloggedFILTER BYPASSING. SCRAPPED OIL FILTER.SDR HEEA0015534Filter · cloggedOIL FILTER BYPASS INDICATED TWO TIMES. SCRAPPED OIL FILTER.SDR 98ZZZX3356Gear · galledENGINE REMOVED FOR EXCESSIVE METAL ON BOTH PLUGS. DISASSEMBLED AND FOUND T/M GEAR TO PINION GEAR GALLING CAUSING METAL CONTAMINATION. SUBMITTER STATES IMPROPER MESHING BETWEEN T/M GEAR AND PINION GEAR WAS CAUSE FOR GALLING. SECONDARY DAMAGE - PINION GEAR P/SDR 98ZZZX3359Bolts · losePRIOR TO INSTALLING BLEED VALVE ON TEST BENCH, AN INSPECTION OF ALL SAFETIES WAS ACCOMPLISHED AND FOUND 3 EACH BOLTS WERE SAFTIED BUT LOOSE. THESE BOLTS WERE IMPROPERLY TORQUED AND CAUSED A MAJOR AIR LEAK AT SPLIT LINES OF BLEED VALVE.
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