Allison 250-C30S
Service difficulty reports · 449
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 = '250C30S' 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 = '250C30S' 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 CA960711002Turbine Blades · damaged(CAN) A #2 ENGINE ICP CHECK WAS BEING CONDUCTED WHEN #1 ENGINE WAS OBSERVED STARTING TO DECELERATE ACCOMPANIED BY A FUEL PRESSURE CAUTION LIGHT. WHILE TROUBLESHOOTING #1 ENGINE PROBLEM ENG FAILED. UPON SHUT DOWN AND INVESTIGATION, A POWER TURBINE FAILURE WAS OSDR CA960703002Blade · cracked(CAN) A BORESCOPE INSPECTION OF BLADE ROOT END REVEALED A CRACK ON LEADING EDGE OF SPAR APPROXIMATELY 2" FROM ROOT END AND APPROXIMATELY 1" IN LENGTH. EXACT LENGTH UNKNOWN AS CRACK PROCEEDS UNDER A PHENOLIC BLOCK.SDR HEEA967427Liner · mis mfgUPON ATTEMPTING ASSEMBLY FOUND THE IGNITER AND FUEL NOZZLE BORE DO NOT ALIGN WITH NUMEROUS COMB. CASES. REPLACED DISCREPANT PART.SDR 96ZZZX3414Bearing · wornTHE ENGINE CHIP DETECTOR LIGHT ILLUMINATED IN-FLIGHT. THE TEAR-DOWN INSPECTION OF THE ENGINE REVEALED THE NR 3 AND NR 4 PINION BEARINGS ROLLER CAGES WERE EXCESSIVELY WORN. THESE BEARINGS ONLY HAVE 489.1 OPERATING HOURS SINCE NEW. THE OPERATOR BELIEVES THE 'SDR HEEA967235Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE CYCLED OUT #2 WHEEL AND CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND SERVICEABLE LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD SPLINES. REPLACED DISCREPANT PARTS.SDR HEEA967236Spline Adapter · stepwearENGINE REMOVED DUE TO TURBINE CYCLED OUT #2 WHEEL AND CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND SERVICEABLE LIMITS ON SPLINE ADAPTER INTERNAL SPLINES. REPLACED DISCREPANT PARTS.SDR HEEA967237Carbon Seal · wornENGINE REMOVED DUE TO TURBINE CYCLED OUT #2 WHEEL AND CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: WORN BEYOND SERVICEABLE LIMITS ON CARBON SEAL ASSY. TANGS AND TANG SLOTS. REPLACED DISCREPANT PARTS.SDR HEEA967096Nozzle · crackedENGINE REMOVED DUE TO CYCLED OUT 1ST AND 2ND STAGE WHEELS. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: CRACKS BEYOND OVERHAUL LIMITS ON OUTER BAND (2 EA) AND 50% OF VANES AT TRAILING EDGE. REPLACED PART. NOTE: FUEL NOZZLE SPRAY PATTERN CHECKED GOSDR HEEA967080Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE CYCLES. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND OVERHAUL LIMITS ON AFT SPLINES. REPLACED WITH SERVICEABLE PART.SDR HEEA967081N1 Coupling · step wearENGINE REMOVED DUE TO TURBINE CYCLES. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND OVERHAUL LIMITS IN N1 COUPLING FWD SPLINES. REPLACED WITH SERVICEABLE PART.SDR HEEA967065Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE WHEELS CYCLED OUT. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND OVERHAUL LIMITS ON SPUR ADAPTER GEARSHAFT FWD AND AFT SPLINES. NEW PART INSTALLED.SDR 96ZZZX2218Bearing · galledUPON DISASSEMBLY OF GEARBOX, CLEANED AND INSPECTED PARTS AS REQUIRED. FOUND EXCESSIVE GALLING ON PTO AFT, BEARING INNER RACE. EXCESSIVE GALLING, BEARING INNER RACE, POSSIBLY DUE TO BEARING CAGE OUT-OF-ROUND CAUSING TIGHT FIT BETWEEN INNER AND OUTER RACE AND SDR CA960311001Bolt · cracked(CAN)UPON REMOVING L/H MGB COWLING FOR ROUTINE MAINTENANCE, THE FORWARD MGB ATTACHMENT BOLT WAS NOTICED TO BE RAISED UP FROM FEET. UPON REMOVAL OF THE BOLT IT WAS FOUND CRACKED IN HALF. THE REMAINING HALF OF THE BOLT WAS REMOVED WITH A BOLT EXTRACTOR AND A THSDR 96ZZZX1824Scavenge Body · wornUPON DISASSEMBLY OF GEARBOX, REMOVED OIL PUMP ASSY. VISUALLY INSPECTED, SHOWED WEAR AT SCAVENGE BODY SURFACE, AND IN THE TUBE BONE. SCAVENGE TUBE WORN IN SCAVENGE BODY. SUSPECT CAUSE IS DUE TO IMPROPER FIT OR ALIGNMENT BRACKETS.SDR CA960222004Brake Lining · cracked(CAN)DURING A POST FLIGHT INSPECTION, IT WAS NOTICED THAT THE L/H ROTOR BRAKE ASSEMBLY, FORWARD PAD, LOWER END LINING WAS BROKEN AWAY. THE AMOUNT OF LINING MISSING WAS APPROXIMATELY 25-30 PERCENT.SDR 96ZZZX2362Scavenge Body · wornUPON DISASSEMBLY OF GEARBOX, REMOVED OIL PUMP ASSY. VISUALLY INSPECTED, SHOWED WEAR AT SCAVENGE BODY AND SCAVENGE TUBE MATING SURFACE. SCAVENGE TUBE WORE INTO SCAVENGE BODY. SUSPECT CAUSE IS DUE TO IMPROPER FIT ON ALIGNMENT BRACKETS.SDR HEEA966535Signal Condition · malfunctionFUEL FLOW IND. NEEDLE PEGS OUT. SIGNAL GENERATOR MALFUNCTION.SDR CA960126006Flange · cracked(CAN)DURING FLIGHT PILOTS REPORTED A HIGH FREQUENCY VIBRATION IN THE FOOT PEDALS AND PARKING BRAKE 'T' HANDLE. A LOUD GROWL NOISE WAS ALSO HEARD FROM THE #1 ENGINE. UPON SHUT DOWN AND FURTHER INVESTIGATION , IT WAS FOUND THAT THE #1 ENGINE OUTPUT FLANGE SHAFT SDR HEED95417Seal Ring · leakingFRONT SEAL ON POWER SHAFT LEAKING ON #1 ENGINE . REPLACED UNIT.SDR HEEA956156Gearshaft · stepwearENGINE REMOVED DUE TO CYCLED OUT WHEELS. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. NEW PART INSTALLED.SDR 95ZZZX6894Pto Gear · cracked4-24-95 - RECEIVED GEARBOX FROM A/C N709AL-PTN WITH PTO GEAR CRACKED. CONDITION - FOUND PTO GEAR CRACKED AT FWD END ABOVE SPLINED AREA. SUSPECT OVERTORQUE ON OUTPUT SHAFT.SDR 95ZZZX6895Nr 2 Nozzle · crackedAIRCRAFT POWER CHECK PROBLEM. FOUND CRACKED OUTERBAND AND BURNED VANE L.E. AND T.E.SDR HEEA955933Diffuser Cover · air leakENGNE REMOVED DUE TO LOW POWER AND TURBINE OVERHAUL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: AIR LEAK AT SPLIT LINE OF DIFFUSER COVER PLATE DUE TO EXCESSIVE DOUBLER WELDS. NOTE: REPLACED PART AND CURED PROBLEM. INSTALLED NEW DIFFUSER COVESDR HEEA955824Spline Adapter · mis mfgRECEIVING INSPECTION OF NEW, NEVER INSTALLED SPLINE ADAPTER INDICATED I.D. MANUFACTURED .0005" OVER MAX B.P. SPECS OF .6565" ADAPTER MEASURES .657. INSTALLED NEW SPLINE ADAPTER.SDR HEEA955827Gearshaft · stepwearENGINE REMOVED DUE TO CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD & AFT SPLINES. NEW PART INSTALLED.SDR HEEA955828Gearshaft · stepwearENGINE REMOVED DUE TO CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FWD & AFT SPLINES. NEW PART INSTALLED.SDR HEEA955829Gearshaft · stepwearENGINE REMOVED DUE TO 1750 HOUR INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT AFT SPLINES. NEW PART INSTALLED.SDR HEEA955481Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL AND 1750 HOUR INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS, NOTED THE FOLLOWING: STEPWEAR IN EXCESS OF MAINTENANCE MANUAL LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFTSDR 95ZZZX4421P.T.O. Gear · making metalDISASSEMBLED GEARBOX TO INSPECT GEARBOX FOR MAKING METAL. FOUND CAUSE TO BE THE P.T.O. GEAR, IMPROPER MACHINING ON THE GEAR TEETH. DISCOVERED THE TORQUE METER GEAR TO BE MAKING METAL DUE TO THE IMPROPER MACHINING ON THE P.T.O. GEAR TEETH.SDR HEEA955223Wheel · sulfidationENGINE DISASSEMBLED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: MINOR SULFIDATION ON OUTER TIP PATH AREAS OF ALL BLADES. SCRAPPED 2ND STAGE WHEEL.SDR HEEA955224Wheel · sulfidationENGINE DISASSEMBLED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: MINOR SULFIDATION ON ALL 1ST STAGE WHEEL BLADES. SCRAPPED 1ST STAGE WHEEL.SDR HEEA955117Coupling · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON N1 COUPLING FORWARD I.D. SPLINES. INSTALLED NEW N1 COUPLING.SDR HEEA955118Nozzle · defectiveRECEIVING INSPECTION OF NEW, NEVER INSTALLED 2ND STAGE NOZZLE INDICATES .009" RUNOUT IN BOTH TIP PATHS, DIAPHRAGM OFF CENTER. NOTE: DAMAGE TO KEYS AND TANGS BY ADJUSTMENT PRIOR TO RECEIPT BY PHI. INSTALLED NEW 2ND STAGE NOZZLE.SDR 95ZZZX3337Filter Cap · brokenON 5-31-95 AT 1700, PILOT REPORTED NR 2 ENGINE LOW PRESSURE LIGHT ON. OIL PRESSURE LOW. SMELL OF OIL IN CABIN. SHUT DOWN ENGINE. SINGLE ENGINE LANDING MADE IN HOUMA. FOUND EAR ON ENGINE OIL FILTER CAP BROKEN, O-RING CUT. MINIMUM OIL PRESSURE BEFORE ENGINSDR 95ZZZX3373Roller Bearing · failedREPORTED LOUD GRINDING NOISE ON SHUT DOWN. COMPRESSOR WAS DISASSEMBLED DUE TO IMPELLER DRAGGING ON SHROUD AND FOUND NR 1 ROLLER BEARING HAD FAILED. UPON DISASSEMBLY, FOUND SEPARATE CAGE FOR ROLLERS BROKEN. APPROXIMATELY 80 DEGREES OF SEPARATOR CAGE BROKEN OSDR HEEA954913Gearshaft · step wearENGINE REMOVED DUE TO TURBINE OVERHAUL AND COMPRESSOR N1 SHAFTING INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFT.SDR HEEA954914Gearshaft · step wearENGINE REMOVED DUE TO COMPRESSOR 1750 HOUR INSPECTION AND TURBINE OVERHAUL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFT.SDR HEEA954915Lab Seal · defectiveRECEIVING INSPECTION OF NEW, NEVER INSTALLED #8 BEARING. LAB SEAL INDICATED EXCESSIVELY FLATTENED LAB SEAL. INSTALLED NEW LAB SEAL.SDR 95ZZZX2796Scavenge Tube · bracket brokenDURING SUDDEN PUMP STOPPAGE INSPECTION. DISCOVERED LOWER BRACKET ON THE SCAVENGE TUBE TO BE BROKEN. NOTE: THE MOUNTING NUT WAS HOLDING THE BRACKET. THE SCAVENGE TUBE WAS HELD IN BY THE TOP MOUNTING BRACKET AND THE OIL PUMP SCAVENGE BORE.SDR 95ZZZX2804Combustion Case · crackedTHIS DEFECT WAS DISCOVERED AT 1750-HOUR OVERHAUL. OUTER COMBUSTION CASE WAS CRACKED IN ARMPIT UNDER THE SCREEN PATCH REINFORCEMENT AND EXTENDED ON SEAM AND INTO THE SEAM PERPENDICULAR TO THE FLANGE AND PARALLEL TO THE FLANGE. A CRACK SUCH AS THIS MAY CAUSE PSDR HEEA954892Wheel · sulfidationENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: EXCESSIVE SULFIDATION AND DELAMINATION ON ALL 1ST STAGE WHEEL BLADES CAUSING 10 EACH BLADE TIP FAILURES .062" CHORDALLY PROGRESSING .062"ACROSS TRAILING EDGE MAXIMUSDR HEEA954669Gearshaft · stepwearENGINE REMOVED DUE TO CYCLED 1ST AND 2ND STAGE WHEELS. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND SPECS ON SPUR ADAPTER GEARSHAFT FWD AND AFT SPLINES AND STEP WEAR ON INTERNAL SPLINES OF SPLINE ADAPTER BEYOND SPECS. INSTALLED NSDR HEEA954670Spline Adapter · wornENGINE REMOVED DUE TO CYCLED 1ST AND 2ND STAGE WHEELS. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND SPECS ON SPUR ADAPTER GEARSHAFT FWD AND AFT SPLINES AND STEP WEAR ON INTERNAL SPLINES OF SPLINE ADAPTER BEYOND SPECS. INSTALLED NSDR HEEA954671N1 Coupling · stepwearENGINE REMOVED DUE TO CYCLED 1ST AND 2ND STAGE WHEELS. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: FWD AND AFT SPLINE STEP WEAR BEYOND LIMITS ON N1 COUPLING. INSTALLED NEW COUPLING.SDR HEEA954639Gearshaft · stepwearENGINE REMOVED DUE TO N1 SHAFTING INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFT.SDR HEEA954303Spline Adapter · wornENGINE REMOVED DUE TO N1 SHAFTING INSPECTION AND 4 EACH COMPRESSOR MOUNT STUDS PULLED. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: WEAR ON THE SPLINE ADAPTER RETAINING RING GROOVE AFT FACE. INTERFERENCE FIT BETWEEN I.D. OF SPLINEADAPTER GROOVE SDR HEEA954305Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFT. SEE MMIR# 4306 FOR ADAPTER WHICH WAS ALSO REPLACSDR HEEA954306Spline Adapter · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPLINE ADAPTER INNER SPLINES. INSTALLED NEW ADAPTER. SEE MMIR# 4305 FOR SPUR ADAPTER GEARSHAFT WHICH WAS ALSO REPLACED.SDR 95ZZZX1060Relay · malfunctionNR 2 ENGINE CHIP LIGHT ILLUMINATED. REPLACED NR 2 ENGINE CHIP RELAY (K8). SYSTEM CHECKED AND FOUND TO OPERATE NORMALLY.
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