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 ALG2003F00017Line · looseDURING REFUELING, FUEL LEAKING FROM THE BELLY OF THE AIRCRAFT, THE MECHANIC FOUND FUEL BOOST PUMP TRANSFER LINE IS LEAKING, TIGHTENED THE LINE AND LEAK CHECKED AND FOUND OK., THE AIRCRAFT WAS RETURNED TO SERVICE.SDR ALG2003F00032Line · leakingDURING PREFLIGHT, FUEL IS LEAKING FROM THE LINE (PN 6890579) , FUEL CONTROL TO PUMP BYPASS) THE MECHANIC REMOVED THE LINE, INSPECTED IT AND REINSTALLED THE LINE. THE FUEL SYSTEM WAS BLED AND THE AIRCRAFT WAS GROUND RUN, LEAK CHECKED OK AND AIRCRAFT RETURNED TSDR ALG2003F0000BLongeron · corrodedDISCOVERED WHILE DOING REFURBISHING, MALFUNCTION OF LONGERON WAS CORROSION AND ELONGATED HOLES.SDR ALG2003F00010Fuel Cell · leakingDURING RUN-UP, GROUND SUPPORT DETECTED THE ODOR OF FUEL FROM THE REAR PASSENGER COMPARTMENT. THE MECHANIC REMOVED AND REPLACED RIGHT FORWARD FUEL CELL AND AIRCRAFT WAS RETURNED TO SERVICE.SDR ALG2003F00001Line · leakingDURING POST FLIGHT. FUEL LINE FROM THE FUEL CONTROL TO THE FIRESHIELD WAS LEAKING, THE MECHANIC REMOVED AND REPLACED THE LEAKING LINE AND THE AIRCRAFT WAS RETURNED TO SERVICE.SDR 2002FA0001147Shaft · corrodedON VISUAL INSPECTION OF SHAFT, FOUND EXCESSIVE PITTING ON INNER RACE AREA. EXCESSIVE CORROSION ON INNER RACE SURFACE. PROTECTIVE GREASE WAS ON SURFACE OF INNER RACE.SDR 2002FA0000705Gear · damaged(PTO GEAR) UPON VISUAL INSPECTION OF PART AFTER BEING CHECKED OUT OF STOCK. DAMAGE TO 4 EA SMALL GEAR TEETH AND 1 EACH TOOTH HAS ARC LIKE RECESSED AREA.SDR CA020523015Mount · cracked(CAN) AT THE 100 HOUR ENGINE INSPECTION A CRACK WAS FOUND AT THE 6 O'CLOCK POSITION, ON THE COMPRESSOR MOUNT ASSEMBLY, ADJACENT TO THE HOLE APPROXIMATELY 1 1/2 INCHES LONG.SDR 2002FA0000709Gear · roughUPON RECEIVING AND INSPECTION, ROUGH EDGES OF RADIUS OF GEAR TEETH AFT SIDE.SDR CA020130005Bearing · failed(CAN) PILOT REPORTED A "SPRINGY" FEELING IN CYCLIC ALONG WITH THE NECESSITY OF APPLYING CONSTANT FORWARD CYCLIC INPUT FOR CRUISE FLIGHT. NO PROBLEMS WERE FOUND IN THE FLIGHT CONTROLS. THE ROTOR HEAD WAS REMOVED AND DISASSEMBLED AND AT THIS TIME THE DAMAGED BEASDR CA020405014Nozzle · burned(CAN) HOT END INSPECTION REVEALED THE FIRST STAGE NOZZLE BURNT BEYOND ACCEPTABLE LIMITS.SDR 2001F00575Turbine Wheel · corrodedWHEN TURBINE CAME IN FOR NR 3 AND NR 4 WHEEL CHANGE AND VISUAL INSPECTION ON TURBINE HOT END. NR 1 WHEEL SHOWED EARLY ATTACK OF SULFIDATION. (M)SDR 2002FA0000075Turbine Wheel · corrodedWHEN TURBINE CAME IN FOR NR 3 AND NR 4 WHEEL CHANGE AND VISUAL INSPECTION ON TURBINE HOT END. NR 1 WHEEL SHOWED EARLY ATTACH OF SULFIDATION. HAVE WHEEL TESTED FOR PROPER COATING. (M)SDR CA010827009Blade · torn(CAN) WHILE IN FLIGHT THE T/R COULING FILLER COVER DEPARTED AND STRUCK THE TAIL ROTOR BLADE CAUSING A 2 CM TEAR OR HOLE IN ONE BLADE ABOUT 2/3 OF THE WAY DOWN. JUST AFT OF THE LEADING EDGE. THE A/C LANDED SAFELY. NO OTHER DAMAGES WAS FOUND. NEW COVER TO T/R ASSDR HEEA072565Governor · dirtyWILL NOT RECOVER RPM AFTER COLLECTIVE POWER CHANGES. FOUND INTERIOR OF UNIT TO BE DIRTY WHICH COULD HAVE CAUSED GOVERNOR TO HANG AND HAVE HYSTERSIS PROBLEMS.SDR HEEA072566Governor · malfunctionedAIRCRAFT EXPERIENCES OVERSPEEDS ON LANDINGS AND DROOPS DURING TAKE OFF. REPLACED GOVERNOR ASSY.SDR 20010420CW017Relay · burnedDURING ATTEMPT AT FIRST START. SPIKE IN COCKPIT STARTER RELAY (BEHIND HAT RACK) BURNED STARTER BUTTON, ALSO FOUND INTERMITTENT.SDR CA000907002Pin · worn(CAN) DURING MAINTENANCE TEARDOWN, PINS FOUND TO HAVE MECHANICAL WEAR AND REPLACED. (X)SDR CA020905003Spring · broken(CAN) BROKEN SPRING INSIDE COUPLING. DAMAGE TO SPHERICAL COUPLING AND END CAP. PROBLEM FOUND DURING 600 HR / 12 MTH LUBRICATION.SDR CA000511020Compressor · cracked(CAN) 1.5 INCH CRACK FOUND ON COMPRESSOR SCROLL STARTING ALONG AFT RADIUS OF SCROLL PROGRESSING TOWARD DISCHARGE ELBOW AND TURNING TO MIDDLE OF OUTSIDE FACE.SDR 20000412SH038Combustion Liner · failedCOMBUSTION LINER OUTER SKIRT TABS WELDS FAILED AND WERE INGESTED INTO TURBINE. (X)SDR CA000404024Bearing · wrong part(CAN) UPON RECEIPT OF SWASHPLATE DUPLEX BEARING, IT WAS NOTED THAT THE BEARING DID NOT CONFORM TO SPECIFICATIONS WHICH IS TO HAVE 49 BALLS IN A CAGE. HOWEVER, THIS PARTICULAR BEARING HAD 50 BALLS WITH 1 EXTRA BALL LOCATED OUTSIDE THE CAGE IN THE RELIEF SLOT. SDR CA000329002Fitting · cracked(CAN) DURING 100-HOUR INSPECTION, A CRACK WAS DETECTED ON UPPER LT TAILBOOM ATTACHMENT FITTING. CRACK EMANATED FROM FITTING TO INBOARD UPPER RIVET HOLE AND TRAVELLED ENTIRE SURFACE AREA FROM TOP TO BOTTOM.SDR 2000ZZZX123Gearshaft · wornSEVERE SPLINE WEAR WAS NOTED ON THE AFT END OF THE GEARSHAFT AFTER THE ENGINE WAS DISASSEMBLED FOR MAINTENANCE. NO APPRECIABLE WEAR WAS NOTED ON THE SPLINES OF THE MATING PART.SDR 2000ZZZX122Coupling Spline · wornWORN SPLINES WERE NOTED IN ONE END OF THE COUPLING AFTER THE ENGINE WAS DISASSEMBLED FOR MAINTENANCE. THE SPLINES WERE CHECKED FOR WEAR WITH THE MANUFACTURER'S RECOMMENDED TOOL. NOT ONLY DID THE TOOL (A NO-GO GAUGE) ENTER THE WORN AREA, BUT IT FIT INTO THE SSDR HEEA064921Carbon Seal · leakingINSTALLED NEW CARBON SEAL ASSY P/N 23004513, PERFORMED PRESSURE CHECK AND ASSEMBLY LEAKED. INSTALLED SECOND NEW CARBON SEAL ASSY P/N 23004513 PERFORMED LEAK CHECK AND NO LEAKS NOTED. REPLACED CARBON SEAL ASSY.SDR HEEA064907Nozzle · crackedENGINE REMOVED DUE TO MAKING METAL AND LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED 1ST STAGE NOZZLE VANES BEYOND SERVICEABLE LIMITS.SDR HEEA064464Carbon Seal · leakingENGINE REMOVED DUE TO NR 1 BEARING OIL LEAK. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: GROOVED SLOTS AND TANGS BEYOND SERVICEABLE LIMITS ON CARBON SEAL ASSY. NEW PART INSTALLED.SDR HEEA064391Carbon Seal · leakingCARBON SEAL INSPECTION REVEALED LEAKS DURING PRESSURE TEST.SDR 99ZZZX4087Coupling · mismanufacturedSUBMITTER SUSPECTED MIS-MANUFACTURED PART. SPLINES ARE MACHINED THROUGH SEAL RING GROOVES.SDR HEEA063854Nozzle · crackedENGINE REMOVED DUE TO CRACKED EXHAUST COLLECTOR. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: CRACKED VANES ON NR 1 NOZZLE. INSTALLED NEW PART.SDR HEEA063666Gearshaft · wornENGINE REMOVED DUE TO 1,500 HOUR INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED: STEP WEAR BEYOND LIMITS ON SPUR GEAR AFT END SPLINES. INSTALLED NEW SPUR GEARSHAFT.SDR HEEA063669Gearshaft · wornENGINE REMOVED DUE TO HIGH TIME IMPELLER. UPON INSPECTION OF COMPRESSOR PARTS NOTED: STEP WEAR BEYOND LIMITS ON SPUR GEAR AFT END SPLINES. INSTALLED NEW SPUR GEARSHAFT.SDR HEEA063252Fuel Pump · wornFOUND EXCESSIVE STEP WEAR AND PITTING ON INNER SPLINES AND DRIVE SHAFT ON FUEL PUMP.SDR HEEA063189Fuel Pump · wornFUEL PUMP HAD EXCESSIVE STEP WEAR ON SPLINE.SDR HEEA062798Diffuser Vane · mismanufacturedENGINE REMOVED DUE TO LOW POWER. COMPRESSOR DISASSEMBLED,TROUBLESHOOTING LOW POWER. REPLACED VANE ASSY. CURED POWER. VANE TRIED ON SEVERAL COMPRESSORS; ALL WERE LOW POWER. REPLACED VANE. INSTALLED A SERVICEABLE VANE ASSY.SDR HEEA062851Pump · damagedFUEL PUMP SUCKING AIR. PERFORMED SPLINE INSPECTION AND FOUND DRIVE SPLINES TO BE PITTED.SDR CA990728047Damper Hub · misrepaired(CAN) STARTER/GENERATOR WAS SENT FOR ROUTINE OVERHAUL AND UPON OVERHAUL IT WAS NOTICED THAT IT HAD BEEN PREVIOUSLY ASSEMBLED WITH A WORN OUT DAMPER HUB AND WAS ALSO MISSING A BRASS SHIM. HUB WAS SUBSEQUENTLY REPLACED DURING THIS OVERHAUL AND RETURNED TO SERVISDR HEEA062406Pto Gear · damagedREMOVED DUE TO GROOVED SEAL JOURNALS. P.T.O. GEAR INSTALLED IN ACCORDANCE WITH RFSE-250-93-1.SDR HEEA062401Adapter · wornENGINE REMOVED DUE TO IMPELLER RETIREMENT. UPON INSPECTION OF COMPRESSOR PARTS NOTED: STEP WEAR BEYOND SERVICEABLE LIMITS ON SPUR GEAR SHAFT AFT SPLINES. FAILED NO-GO GAUGE. INSTALLED A NEW SPUR GEAR SHAFT.SDR HEEA062402Adapter · wornENGINE REMOVED DUE TO CRACKED EXHAUST COLLECTOR. COMPRESSOR REPAIRED DUE TO WHINE BETWEEN 10 PERCENT AND 35 PERCENT TORQUE. INSPECTION OF COMPRESSOR PARTS REVEALED SPUR GEAR SHAFT AFT SPLINES FAILED NO-GO GAUGE CHECK. INSTALLED A NEW SPUR GEAR SHAFT.SDR HEEA062403Adapter · wornENGINE REMOVED DUE TO CRACKED EXHAUST COLLECTOR. COMPRESSOR REPAIRED DUE TO BROKEN VANE STUD. INSPECTION OF COMPRESSOR PARTS REVEALED STEP WEAR IN EXCESS OF NO-GO GAUGE LIMITS ON AFT END SPLINES. INSTALLED A NEW SPUR GEAR SHAFT.SDR 99ZZZX2209Scroll · crackedCOMPRESSOR SCROLL P/N 23056109 DEVELOPED AN APPROXIMATELY 4 INCH CRACK ON THE RT SIDE JUST BELOW THE ANTI-ICE VALVE PAD. ENGINE POWER CHECKS INDICATED POWER LOSS. REPLACED COMPRESSOR.SDR HEEA061566Filter · malfunctionedFILTER WILL NOT BYPASS.SDR HEEA061568Filter · malfunctionedFILTER WILL NOT BYPASS.SDR HEEA060655Governor · malfunctionedIN CRUISE FLIGHT, PILOT EXPERIENCED TORQUE OSCILLATIONS AND YAW WITH CORRESPONDING TORQUE, TOT, N1 AND N2 INDICATIONS. REMOVED GOVERNOR AND FOUND SHAFT HARD TO TURN. A LARGE AMOUNT OF METAL PARTICLES WERE FOUND IN THE MOUNTING FLANGE AREA. FOUND DRIVE BEARINSDR HEEA060354Adapter · flakingENGINE REMOVED DUE TO CRACKED SCROLL. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: COATING MISSING AND FLAKING OF SPLINE ADAPTER. INSTALLED A NEW SPLINE ADAPTER.SDR HEEA0016131Support · mismanufacturedENGINE REMOVED DUE TO CRACKED SCROLL. FRONT SUPPORT WAS TRANSFERRED TO COMPRESSOR S/N CAC70646. ENGINE FAILED CELL TEST DUE TO HIGH COMPRESSOR VIBS. REPLACED FRONT SUPPORT. CURED PROBLEM. TRANSFERRED FRONT SUPPORT TO COMPRESSOR S/N CAC70016. ENGINE FAILSDR HEEA0016122Tube · mismanufacturedRECEIVING INSPECTION REVEALED: PISTON RING AREA OVERSIZED. PART OVERHAULED ON WO NR L1742524.SDR HEEA0016048Splines · wornENGINE REMOVED DUE TO SMOKE ON SHUT DOWN. INSPECTION OF COMPRESSOR REVEALED: STEP WEAR BEYOND SERVICEABLE LIMITS ON SPUR GEAR SPLINES.
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