Allison 250-C30P
Service difficulty reports · 646
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 = '250C30P' 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 = '250C30P' 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 HEEA968395Bearing · making metalENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF GEARBOX PARTS NOTED: (1) METAL SLIVERS ON #3 BEARING INNER RACE (2) CRACKED ROLLER RETAINER & METAL SLIVERS ON #4 BEARING INNER RACE. INSTALLED NEW BEARINGS. SEE MMIR# HEEA0008395 FOR #4 BEARING INFORMSDR CA961203008Bearing Race · rough(CAN) DURING INSPECTION OF TAIL ROTOR, A ROUGH, RATCHETING FEELING WAS NOTICED. FURTHER INSPECTION REVEALED THAT THE INNER BEARING RACE WAS CRACKED.SDR 96ZZZX5449Nozzle Shield · elongated holesUPON DISASSEMBLY OF THE TURBINE FOR REPLACEMENT OF THE FIRST STAGE NOZZLE, FOUND FRETTING WEAR ON THE SHEATHS OF THE TOT HARNESS PROBES, AND ELONGATED HOLES IN THE THIRD STAGE NOZZLE SHIELD WHERE THE PROBES PASS THROUGH. TOT HARNESS REQUIRED REPLACEMENT.SDR 96ZZZX5450Harness · frettedUPON DISASSEMBLY OF THE TURBINE FOR REPLACEMENT OF THE FIRST STAGE NOZZLE, FOUND FRETTING WEAR ON THE SHEATHS OF THE TOT HARNESS PROBES, AND ELONGATED HOLES IN THE THIRD STAGE NOZZLE SHIELD WHERE THE PROBES PASS THROUGH. TOT HARNESS REQUIRED REPLACEMENT.SDR CA960924022Blade · separation(CAN) SKIN SEPARATION FROM LEADING EDGE OF BOTH BLADES.SDR HEEA967786Gear · defectiveRECEIVING INSPECTION REVEALED: SERIAL NUMBER ON SPUR GEAR DOES NOT MATCH NUMBER ON BOX. REPLACED DISCREPANT PART.SDR HEEA967643Liner · defectiveCOMBUSTION LINER REMOVED FROM TURBINE DUE TO -2 LOW POWER ON TEST CELL. TURBINE PRODUCED +1.6 WITH OH REPLACEMENT LINER. REPLACED DISCREPANT PART.SDR HEEA967645Shroud Housing · distortedCOMPRESSOR DISASSEMBLED DUE TO LOW POWER ON TEST CELL (-11.1). UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: DISTORTED FINISH ON SHROUD HOUSING COATING AS MARKED. (NOTE: ENGINE POWER +1.6 WITH OH REPLACEMENT PART) REPLACED DISCREPANT PART.SDR HEEA967630Gearshaft · mis mfgUPON INSPECTION OF PART NOTED THE FOLLOWING: IMPROPERLY FINISHED MACHINING ON GEARSHAFT FWD ID FACE AS MARKED. REPLACED DISCREPANT PART.SDR 96ZZZX4842Drive Shaft · wornDURING DISASSEMBLY FOR OVERHAUL, FOUND WORN DRIVESHAFT SPLINES (SMALL END) AND WORN INTERNAL GEAR SPLINE. (PARTS SCRAPPED). SUSPECT IMPROPER LUBRICATION.SDR 96ZZZX3413Bearing · failedTHE ENGINE CHIP DETECTOR LIGHT ILLUMINATED IN CRUISE FLIGHT OVER THE GULF OF MEXICO. THE PILOT LANDED THE HELICOPTER ON NEAREST OFFSHORE PLATFORM, APPROXIMATELY 7 MILES AWAY. MAINTENANCE INSPECTED THE CHIP DETECTOR PLUGS AND FOUND THE LOWER PLUG COVERED WITHSDR HEEA967091Seal · bore oversizeUPON INSPECTION OF PART FOUND THE #5 STATIONARY LAB SEAL BORE I.D. .006 OVERSIZE.SDR 96ZZZX2934Seal · leakingDURING FLIGHT, THE TRANSMISSION PRESSURE CAUTION LIGHT ILLUMINATED. THE PRESSURE GAUGE INDICATED 30 PSI. DURING FINAL APPROACH, PRESSURE DROPPED TO 20 PSI AND TO 10 PSI DURING HOVER. UPON LANDING, PRESSURE RETURNED TO 25 PSI. AIRCRAFT WAS INSPECTED AND THESDR CA960507018Indicator · not indicating(CAN)PILOT REPORTED ENGINE OUT HORN AND ENGINE OUT LIGHT. NG TACH INDICATOR NOT INDICATING. ALL OTHER GAUGES READING NORMAL.SDR 96ZZZX2598Tube Assy · chafedFREEWHEEL RETURN HOSE CHAFED THROUGH ENGINE OIL PRESSURE TUBE CAUSING OIL TO LEAK ONTO DECK. PRECAUTIONARY LANDING MADE, LINE REPLACED AND RETURNED AIRCRAFT TO SERVICE.SDR HEEA966862Gearshaft · stepwearENGINE REMOVED DUE TO CRACKED COMPRESSOR SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: SPLINE STEP WEAR BEYOND OVERHAUL LIMITS ON SPUR ADAPTER GEARSHAFT AFT TURBINE SPLINES. NEW PART INSTALLED.SDR 96ZZZX2802Shear Pin · failedPILOT NOTED A HIGH PITCH WHINE EMANATING FROM ENGINE AREA. A VISUAL INSPECTION WAS PERFORMED OF THE ENGINE AND DRIVE TRAIN AREAS. NO DEFECTS NOTED. ENGINE CHIP PLUGS WERE INSPECTED. NO METAL NOTED. APPROXIMATELY 1.50 HOURS AFTER INSPECTION, THE ENGINE CHISDR HEEA966759Pump · worn excessFUEL PUMP IS WORN EXCESSIVELY. (WORN INTERNAL SPLINES)SDR HEEA966689Fuel Pump · wornFUEL PUMP WORN INTERNAL SPLINES.SDR HEEA966680Shield · defectiveUPON INSPECTION PER CEBA-72-3208 OF DALLAS AIRMOTIVE OH #1 NOZZLE SHIELD, NOTED THE FOLLOWING: DOME FAILED CHEMICAL CHECK.SDR 96ZZZX2357Scavenge Tube · bracket brokenUPON DISASSEMBLY OF GEARBOX, REMOVED OIL PUMP ASSY, AND SCAVENGE TUBE. FOUND ALIGNMENT BRACKET ON SCAVENGE TUBE BROKEN. ALIGNMENT BRACKET AT LOWER END OF SCAVENGE TUBE WAS FOUND BROKEN AT WELD AREA. SUSPECT CAUSE IS DUE TO IMPROPER FIT ON ALIGNMENT BRACKETSSDR CA960129022Seal · unseats(CAN)WHILE GREASING HEAD THE SEAL BECOME DISLODGED AND MOVE INBOARD, AND HAVE TO BE RESEATED.SDR HEEA966375Bearing · crackedENGINE REMOVED DUE TO CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 2 EACH CRACKS IN SEPERATOR ON #1 ROLLER BEARING AND WORN TANGS AND TANGSLOTS ON CARBON SEAL ASSEMBLY. NEW PARTS INSTALLED. REFERENCE: AFA#24453A. NOTE: SEE MMIRSDR HEEA966376Carbon Seal · worn tangsENGINE REMOVED DUE TO CRACKED SCROLL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 2 EACH CRACKS IN SEPERATOR ON #1 ROLLER BEARING AND WORN TANGS AND TANGSLOTS ON CARBON SEAL ASSEMBLY. NEW PARTS INSTALLED.REFERENCE: AFA#24453A. NOTE: SEE MMIR#SDR HEEA956224Spline 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. SHIPMENT OF PART AND SUBMITTAL FOR CREDIT ACCOMPLISHED ON AFA# 24444A.SDR HEEA956157Gearshaft · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL AND COMPRESSOR 1750 HOUR INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. NEW PART INSTALLED.SDR 96ZZZX106Pc Tube Assy · b-nut burredDURING REMOVAL OF LINE TO C/W ENGINE POWER RECOVERY WASH. NOTICED THE B-NUT WAS HARD TO TURN WHEN REMOVING THE LINE. B-NUT THREADS BURRED.SDR 95ZZZX7042Pump · inoperativeFUEL PUMP INOP. REPLACED WITH NEW FUEL PUMP.SDR HEEA955925Bearing · crackedENGINE REMOVED DUE TO TURBINE OVERHAUL AND COMPRESSOR 1750 HOUR INSPECTION. UPON DISASSEMBLY OF #1 BEARING AREA DUE TO OIL LEAK NOTED THE FOLLOWING: #1 BEARING FAILURE. FOUND 75% OF SEPERATOR CRACKED AFT OF CENTERING TAB; WITH BREAK OUT OF 40%FWD RING. SCRASDR HEEA955926Bearing Housing · crackedENGINE REMOVED DUE TO TURBINE OVERHAUL AND COMPRESSOR 1750 HOUR INSPECTION. UPON DISASSEMBLY OF #1 BEARING AREA DUE TO OIL LEAK NOTED THE FOLLOWING: #1 BEARING FAILURE. FOUND 75% OF SEPERATOR CRACKED AFT OF CENTERING TAB; WITH BREAK OUT OF 40%FWD RING. SCRASDR 96ZZZX979Nozzle · defectiveFUEL NOZZLE 'ERRATIC SPRAY PATTERN'.SDR 95ZZZX4504Wheel · crackedDURING INSPECTION OF FIRST STAGE NOZZLE, FOUND FIRST STAGE WHEEL CRACKED AT THE INNER RING. CRACK PROGRESSES TOWARD THE SPLINED SHAFT. THIS HAS BEEN THE FIRST OCCURRENCE OF FIRST STAGE TURBINE WHEEL BEING CRACKED AT THIS LOCATION.SDR 95ZZZX5473Scroll · foreign objectUPON AIR LOGISTICS BORESCOPE INSPECTION, FOUND CERAMIC BEAD LODGED IN AIR SLOT ON INTERNAL PART OF SCROLL.SDR HEEA955057Coupling · stepwearENGINE REMOVED DUE TO TURBINE OVERHAUL AND COMPRESSOR 1750 HOUR INSPECTION. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: STEP WEAR BEYOND LIMITS ON N1 COUPLING I.D. SPLINES. INSTALLED NEW N1 COUPLING.SDR 95ZZZX2784Compressor · contaminatedDURING A COMPRESSOR CHANGE FOUND WHILE POSITIONING THE COMPRESSOR ON A WORK BENCH, A SMALL WHITE HARD BEAD ROLLED OUT OF THE SCROLL DISCHARGE TUBE. THE COMPRESSOR SCROLL WAS BORESCOPED TO CHECK FOR ANY MORE BEADS WHICH MAY HAVE BEEN LODGED IN THE SCROLL. NO SDR 95ZZZX3335Bleed Valve · failedSHORTLY AFTER TAKEOFF, PILOT REPORTED ENGINE COMPRESSOR STALL. LANDED ON OFFSHORE PLATFORM WITHOUT INCIDENT. FOUND BLEED VALVE STUCK IN OPEN POSITION. ALLISON 250-C30 IPC, CHAPTER 75, SECTION 10-00, FIGURE 5, ITEM 1J.SDR EKGA9520837Shaft Seal · leakingSTARTER DRIVE SEAL IS LEAKING.SDR HEEA954916Bearing · defectiveENGINE REMOVED FOR MODIFICATION. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: PULLER GROOVE MISSING ON #8 BEARING. INSTALLED NEW #8 BEARING.SDR 95ZZZX2785Gearshaft · pittedUPON DISASSEMBLY AND INSPECTION, FOUND AIR OIL GEARSHAFT PITTED.SDR GCHA957Compressor · crackedREMOVED COMPRESSOR DUE TO CRACKED COMPRESSOR SCROLL AND LOW POWER. REMOVED COMPRESSOR S/N CAC-90608, AND REPLACED IT WITH COMPRESSOR S/N CAC-90095.SDR HEEA954611Governor · defectiveON TAKEOFF, N1, N2 AND ROTOR FLUCTUATIONS -- OVERTORQUE EXCEEDING 120%. REPLACED WITH SERVICEABLE GOVERNOR AND PERFORMED OVERTORQUE INSPECTION.SDR 95ZZZX2472Fuel Control · defectivePART WAS ZERO TSO, COULD NOT ADJUST START ADJUSTMENT FOR A COOL ENOUGH START EVEN AT LOWEST SETTINGS.SDR HEEA954468Pump · leakingLEAKING. REPLACED WITH SERVICEABLE OIL PUMP.SDR HEEA954406Nozzle · defectiveENGINE REMOVED DUE TO N2 DRAG. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: LIFTING AND FLAKING PLASMA IN 4TH STAGE NOZZLE #4 TIP PATH. INSTALLED SERVICEABLE 4TH STAGE NOZZLE.SDR 95ZZZX1138Mount Assy · mismanufacturedMOUNT FACE TO MOUNT BOSS HEIGHT LIMITS ARE 1.715 INCHES TO 1.707 INCHES IN THE O/H MANUAL. THIS MOUNT MEASURED 1.770 INCHES TO 1.730 INCHES. THE MISALIGNMENT DAMAGED THE SPUR ADAPTER, GEAR SHAFT, COUPLING ADAPTER, AND IMPELLER BORE.SDR HEEA954339Gearshaft · step wearENGINE REMOVED DUE TO 1750 HOUR OVERHAUL AND INSPECTION. UPON INSPECTTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEPWEAR BEYOND LIMITS ON SPUR ADAPTER GEARSHAFT FORWARD AND AFT SPLINES. INSTALLED NEW SPUR ADAPTER GEARSHAFT.
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