Allison 250-C28B
Service difficulty reports · 286
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 = '250C28B' 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 = '250C28B' 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 HEEA0016049Spur Gear · wornENGINE REMOVED DUE TO LOW POWER. INSPECTION OF COMPRESSOR REVEALED: WORN BEYOND SERVICEABLE LIMITS ON SHAFT SPLINES.SDR HEEA0016047Turbine · malfunctionedSMOKE ON LANDING AND SHUT DOWN. PART TOTAL CYCLES, 1,687.SDR CA981027021Scroll · cracked(CAN) WHILE CONDUCTING A 600 HOUR INSPECTION, A CRACK 1 INCH BY .50 INCH WAS FOUND IN THE SCROLL ASSEMBLY.SDR HEEA0015718Nozzle · damagedENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED: COATING LIFTING FROM NR 2 NOZZLE 1ST AND 2ND STAGE TIP PATH.SDR HEEA0015719Nozzle · damagedENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR 1 NOZZLE VANES AND OUTER SHROUD.SDR CA980818017Collector · cracked(CAN) ENGINE OIL CONSUMPTION WAS 1 LITRE PER HOUR AND SMOKE WAS COMING FROM THE EXHAUST STACK. INSPECTION FOUND THE 1ST STAGE NOZZLE AND EXHAUST COLLECTOR TO BE CRACKED BEYOND LIMITS. PART TC: 925.SDR HEEA0015075Nozzle · blisteredDURING MACHINING NOTED: BLISTERED COATING BEYOND SERVICEABLE LIMITS ON NR 2 NOZZLE, NR 2 TIP PATH.SDR HEEA0015076Nozzle · mismanufacturedRECEIVING INSPECTION REVEALED: COATING LIFTING ON NR 2 NOZZLE 2ND STAGE TIP PATH.SDR HEEA0015077Nozzle · flakingENGINE REMOVED DUE TO OIL OVERTEMP. UPON INSPECTION OF TURBINE PARTS NOTED: COATING FLAKING ON NR 2 NOZZLE, NR 1 AND NR 2 TIP PATHS.SDR HEEA0015154Igniter · inoperativeVSI RELEASE RELAY DOES NOT WORK, AND DIODE IS BURNED.SDR HEEA0014854Igniter Box · failedENGINE DELAYED STARTS, WEAK IGNITERS.SDR 98ZZZX3166Carbon Seal · failedUPON NR 1 CARBON SEAL LEAK CHECK, FOUND CARBON SEAL WOULD NOT OBTAIN PROPER SEAL.SDR 98ZZZX3167Carbon Seal · failedUPON NR 1 CARBON SEAL LEAK CHECK, FOUND CARBON SEAL WOULD NOT OBTAIN PROPER SEAL.SDR HEEA0014468Actuator · inoperativeACTUATOR INOPERATIVE.SDR HEEA0014469Actuator · inoperativeACTUATOR HAS NO MOVEMENT.SDR HEEA0014470Actuator · damagedEND OF OUTPUT SHAFT SPLIT.SDR HEEA0014442Diffuser · mismanufacturedRECEIVING INSPECTION REVEALED: DISTORTED BEYOND SERVICEABLE LIMITS ON VANE ASSY. (VANE L/E).SDR HEEA0014004Seal · failedCOMPRESSOR DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF COMPRESSOR PARTS NOTED: CRACKED AND FLAKING ON SEAL CARBON OUTER EDGE. INSTALLED A NEW SEAL.SDR HEEA0014005Carbon Seal · wornENGINE REMOVED DUE TO TURBINE OVERHAUL. INSPECTION OF COMPRESSOR PARTS REVEALED: WORN BEYOND SERVICEABLE LIMITS ON SEAL HOUSING TANGS. INSTALLED A NEW SEAL.SDR HEEA0014006Carbon Seal · wornENGINE REMOVED DUE TO CRACKED SCROLL. INSPECTION OF COMPRESSOR PARTS REVEALED: WORN BEYOND SERVICEABLE LIMITS ON SEAL TANGS AND TANG SLOTS. INSTALLED A NEW SEAL.SDR HEEA0014008Carbon Seal · wornENGINE REMOVED DUE TO COMPRESSOR HIGH TIME IMPELLER. INSPECTION OF COMPRESSOR PARTS REVEALED: WORN BEYOND SERVICEABLE LIMITS ON SEAL TANGS AND TANG SLOTS. INSTALLED A NEW SEAL.SDR HEEA0014009Gear · wornENGINE REMOVED DUE TO TURBINE OVERHAUL. INSPECTION OF COMPRESSOR PARTS REVEALED: STEP WEAR BEYOND SERVICEABLE LIMITS ON SPUR GEARSHAFT AFT SPLINES (FAILED NO-GO GAUGE) INSTALLED A NEW SPUR GEAR.SDR HEEA0013882Scroll · damagedRECEIVING INSPECTION REVEALED: HOLE IN INNER SHROUD AT PARTICLE SEPARATOR MOUNT BOLT HOLE.SDR CA980406025Scroll · cracked(CAN) CRACK FOUND IN COMPRESSOR SCROLL AT 2 O'CLOCK POSITION APPROXIMATELY 1.5 INCHES LONG. ALSO FOUND BLEED VALVE MOUNT SCREW THREADS DAMAGED. SUBMITTER STATED THIS IS THE THIRD INSTANCE THAT A CRACK HAS BEEN FOUND IN THIS AREA OF THE 250-C28 ENGINE BY THESDR HEEA0013765Indicator · failedFUEL PRESSURE INDICATOR READS LOW.SDR 98ZZZX1525Ejector Nozzle · brokenEJECTOR TUBE ASSY HAD TOP TUBE BROKEN OFF CAUSING DAMAGE TO IMPELLER REQUIRING IMPELLER TO BE SCRAPED, PIECES OF TUBE WERE FOUND IN COMBUSTOR AND TURBINE NR 1 NOZZLE. TUBE ROUTED TO ALLISON ENGINE CO. FOR ANALYSIS. OPERATOR ROUTED ENGINE TO REPAIR STATION FOSDR HEEA0013668Nozzle Vane · crackedENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED: NR 1 NOZZLE VANE CRACKED AND BURNT BEYOND SERVICEABLE LIMITS.SDR HEEA0013508Nozzle · crackedENGINE REMOVED DUE TO OIL BLOWING OUT OF COMP. DISCHARGE. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR1 NOZZLE VANES, OUTERBAND AND KEYWELDS.SDR CA980406026Nozzle · cracked(CAN) UPON REMOVAL OF TURBINE TO FACILITATE COMPRESSOR CHANGE, FIRST STAGE NOZZLE DOME WAS CRACKED IN CENTER AREA. FIRST STAGE NOZZLE WAS CRACKED ON THE OUTER RING AT 2 ADJACENT VANES. THE OVERHAUL SHOP FOUND A CRACK IN THE EXHAUST COLLECTOR/TURBINE SUPPORT SDR HEEA0013111Fitting · corrodedFUEL MANIFOLD FITTING ASSY. HAS EXCESSIVE CORROSION ON EARS OF MANIFOLD AROUND BOLT HOLES. REPLACED WITH SERVICEABLE PART.SDR HEEA0013034Scroll · warpedENGINE REMOVED DUE TO LOW POWER. SCROLL REMOVED DUE TO EXCESSIVE AIR LEAKS ON TEST CELL BETWEEN SCROLL AND VANE AS MARKED; WARPED FLANGE.SDR HEEA0012988Shroud Housing · defectiveENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF COMPRESSOR PARTS NOTED: COATING LIFTING ON SHROUD HOUSING. INSTALLED A DALLAS AIRMOTIVE OVERHAULED SHROUD ASSY.SDR HEEA0012767Fuel Pump · wornFUEL PUMP EXCESSIVELY WORN INTERNAL SPLINES.SDR HEEA0012794Fuel Pump · pittedFOUND FUEL PUMP WITH PITTED DRIVE SPLINES AND GEARS.SDR 98ZZZX3999Turbine · failedDURING CRUISE FLIGHT, ENGINE CHIP LIGHT ILLUMINATED. ONE MINUTE LATER, PILOT EXPERIENCED ENGINE FAILURE. PILOT THEN PROCEEDED TO AUTO-ROTATE TO SAFE LANDING.SDR HEEA0012382Scroll · mis manufacturedRECEIVING INSPECTION REVEALED: AIR TUBE SOCKET ID NOT MACHINED. INSTALLED AN OVERHAULED DALLAS AIRMOTIVE SCROLL.SDR HEEA0012236Nozzle · crackedENGINE REMOVED DUE TO TURBINE 1500 HOUR OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR1 NOZZLE VANES. INSTALLED A DALLAS AIRMOTIVE OVERHAUL NR1 NOZZLE.SDR 98ZZZX330Governor · failedGOVERNOR REMOVED FOR TORQUE SPIKES WITH POWER CHANGES. COMPONENT OF ENGINE 23004545, S/N CAE890566. REMOVED AND REPLACED.SDR 98ZZZX1259Garlock Seal · leakingNEW PTO SEALS WERE INSTALLED IN REPAIRED GEARBOX. ENGINE WAS ASSEMBLED AND TESTED ON 11-06-97. AFTER TEST CELL RUN, FOUND AFT PTO SEAL BROKEN AT INNER LIP. NEW PTO SEALS ARE NOT AT SAME DIMENSIONS AS OLD (RED) PTO SEALS. NEW PTO SEALS ARE LARGER IN DIAMETESDR HEEA0011661Actuator · inoprativeM/R ACTUATOR WILL NOT ACTUATE.SDR HEEA0011707Actuator · failedACTUATOR DOES NOT MOVE IN OR OUT.SDR 97ZZZX4973Turbine · cokedFIVE MINUTES AFTER TAKEOFF, PILOT NOTICED OIL PRESSURE GAUGE FLUCTUATED FROM 60 PSI - 130 PSI AT A STEADY RATE. DURING A PRECAUTIONARY LANDING, THE TORQUE FLUCTUATED ABOUT 10 PERCENT. UPON INITIAL INVESTIGATION, THE OIL RESERVOIR WAS WAY DOWN AND THE EXHAUSTSDR HEEA0011620Spine · wornFUEL PUMP INTERNAL DRIVE SPLINES WORN.SDR CA971113046Buffer Pad · disbonded(CAN) ROTOR HEAD ASSEMBLY RECEIVED FROM VENDOR TSO ZERO HOURS. SAME FOUND BUFFER PAD ON GRIP DEBONDED BY APPROXIMATELY 50 PERCENT.SDR HEEA0011249Pump · wornFUEL PUMP EXCESSIVELY WORN DRIVE SHAFT DRIVE SPLINES AND INNER GEARS.SDR HEEA0011251Pump · leakingFUEL PUMP LEAKING AT SEAL DRAIN.SDR CA971113045Grip · corroded(CAN) CORROSION BEYOND LIMITS FOUND UNDER DEBONDED UPPER BLADE GRIP BUFFER PAD.SDR HEEA0011201Nozzle · mis mfgRECEIVING INSPECTION REVEALED: EXCESSIVE RUNOUT .020 ON NR2 NOZZLE SEAL BORE.SDR HEEA0011198Pump · shaft wornFOUND DRIVE SHAFT AND GEAR SPLINE WEAR.SDR CA971021002Bearing · failed(CAN) ENGINE CHIP LIGHT CAME ON DURING APPROACH, LANDED, NR 2 BEARING IN ENGINE GENERATING METAL. PART TC: 7,004.
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