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 HEEA076951Generator · corrodedCORROSION. REPLACED WITH SERVICEABLE PART.SDR ALG2001F00026Plug · contaminatedDURING PRESTART CHECK, AFT DETECTOR ON NR2 ENGINE WOULD NOT TEST. WATER WAS FOUND IN THIS PLUG, IT WAS DRIED OUT AND TESTED GOOD.SDR ALG2001F00027Relay · faultyDURING PRESTART CHECK OF THE ENGINE FIRE EXTINGUISHING SYSTEM, BOTTLE FIRED DURING TEST, RELAY COIL FOUND FAULTY.SDR ALG2001F00033Plug · contaminatedDURING PRESTART CHECK. AFT DETECTOR ON NR 2 ENGINE WOULD NOT TEST. WATER WAS FOUND IN THIS PLUG, IT WAS DRIED OUT AND TESTED GOOD.SDR HEEA076273Governor · oscillatesENGINE N1, T5, TORQUE AND FUEL FLOW OSCILLATES AT HIGH POWER SETTINGS. REPLACED WITH SERVICEABLE PART.SDR CA011107001Wheel · cracked(CAN) WHEEL SUBASSEMBLY FOUND CRAKED WHILE INVESTIGATING SLOW LEAK.SDR HEEA075927Governor · failedENGINE N2, T5, FUEL FLOW AND N1 ALL BLEED OFF PRIOR TO REACHING ENGINE LIMITING CHECK PARAMETERS. REPLACED WITH SERVICEABLE PART.SDR AC2A075854Fuel Control · malfunctionedENGINE WENT TO 40.6 PERCENT N1 UPON LANDING. REPLACED FUEL CONTROL.SDR HEEA075484Igniter Box · inoperativeIGNITER BOX INOPERATIVE.SDR CA010828021Coupler · cracked(CAN) DURING INSP OF TAIL ROTOR DRIVESHAFT ASSY IT NOTED THAT FLEX COUPLING BETWEEN INTERMEDIATE GEARBOX & NR 5 TAIL ROTOR DRIVESHAFT HAD CRACKED LAMINATE. COUPLING REMOVED & INSP. IT HAD ONE CRACKED LAMINATE (OUTTER LAMINATE OF PACK) & CRACK LOCATED BETWEEN 2SDR 2001F00605Bearing · failedENGINE MAKING METAL. BEARING FAILED. (M)SDR 2001F00576Turbine Wheel · corrodedTURBINE CAME IN FOR SHOP VISIT FOR LOW POWER. BEGAN DISASSEMBLY OF TURBINE. REMOVED OUTER COMBUSTION CASE AND FOUND SULPHIDATION ON 1ST STAGE WHEEL. HAD 1 BLADE MISSING AND SEVERAL BROKEN BLADES. (M)SDR 2001F00579Blade · corrodedDURING DISASSEMBLY FOR INSPECTION, FOUND SULPHADATION ON BLADES. (M)SDR CA010725032Link · sheared(CAN) DURING MAIN LANDING GEAR RETRACTION AND EXTENSION PILOTS NOTED A SLIGHT YAW. THEY ASSUMED IT TO BE CASUED BY DIFFERNECE IN RETRACTION RATES OF LANDING GEAR. UPON LANDING AT BASE, THE ENGINEER NOTED THAT THE GEAR DOOR WAS LOWER THAN THE RIGHT. INVESTIGATISDR CA010725033Tube · leaking(CAN) APPROX. 10 MINS AFTER TAKEOFF UNUSUAL LOW WHISTLING SOUND NOTICED BY ONE OF PILOTS, FOLLOWED SHORTLY THEREAFTER BY NR 2 SERVO WARMING LIGHT ILLUMINATING & NR 2 HYDRAULIC PRESSURE CYCLING BETWEEN 1000 & 3000PSI. SWITCHED OFF #2 SERVO SWITCH AT WHICH TIME SDR CA010726012Harness · broken(CAN) DURING CRUISE, RED LANDING GEAR UNSAFE LIGHT FLICKERING INTERNITTENTLY WITH A CORRESPONDING "CLUNKING" IN THE AIRFRAME FELT THROUGH THE COLLECTIVE STICK. UPON RETURN FROM FLIGHT MAINTENACE PUT AIRCRAFT ON JACKS AND THE LANDING GEARWAS OPERATED TO SIMULATSDR ALG2001F00014Gear · corrodedUPON REMOVAL FROM BOX AND VISUAL INSPECTION, FOUND CORROSION PITTING ON GEAR SURFACE, GEAR TEETH, AND BEARING JOURNAL. C/W BLACK OXIDE PROCEDURE AT FACTORY BEFORE RELEASING PART.SDR HEEA073008Seal · dislodgedIN CRUISE FLIGHT, NR 1 ENGINE OIL PRESSURE BEGAN TO FLUCTUATE BETWEEN GREEN ARC AND LOWER RED ARC. MAINTENANCE FOUND STARTER GENERATOR SEAL UNSEATED. REPLACED, SERVICED ENGINE OIL SYSTEM AND RETURNED AIRCRAFT TO SERVICE.SDR 20010517CW003Engine · power lossENROUTE, (55 MILES OUTBOUND) NR 1 ENGINE DROPPED OFFLINE, N1 DROPPED TO 36.8 PERCENT, T 5 DROPPED TO 580 DEGREES C AND TORQUE TO 30 PERCENT, PC TUBE FOUND BROKEN AT THE PC FILTER END TUBE.SDR 20010420CW018Caliper · stuckDURING RUN UP PRIOR TO 135 REVENUE FLIGHT. SMOKE COMING OUT OF INTAKE COWLING AREA, NOTIFIED FLIGHT CREW WHO SHUT DOWN THE AIRCRAFT. MAINTENANCE FOUND ONE ROTOR BRAKE PUCK STUCK OUT AGAINST THE DISC CAUSING SMOKE.SDR 20010328CW010Fire Detector · will not testFOUND DURING PRE-START CHECK, FLAME DETECTOR WOULD NOT TEST.SDR 20010420CW013Fire Detector · inoperativeDURING PRESTART CHECK, FLAME DETECTOR WOULD NOT TEST.SDR 20010328CW009Transponder · meltedIN CRUSE FLIGHT, SMOKE IN COCKPIT, ACRID SMELL IN COCKPIT. PHOTOCELL AND ADJACENT AREA OF CONTROL HEAD MELTED.SDR CA010301031Shutoff Valve · leaking(CAN) ON START UP THE NR 1 SERVO JAM WARNING LIGHT WOULD NOT EXTINGUISH WHEN NORMAL HYDRAULIC PRESSURE WAS REACHED. THE FLIGHT CREW SHUT DOWN AND UPON EXITING THE AIRCRAFT SAW HYDRAULIC FLUID UNDER THE AIRCRAFT. THE ENGINEER FOUND THE NR 1 HYDRAULIC SYSTEM FLUSDR 20010328CW011Engine · failedIN CRUSE FLIGHT A LOUD NOISE WAS HEARD AND SHARP YAW WAS EXPERIENCED. NR 2 N1 WAS AT 10 PERCENT, T5 WAS INCREASING THROUGH 800 DEGREES C AND NR 2 FIRE LIGHT ILLUMINATED. FAILED ENGINE WAS VERIFIED AND EMERGENCY CHECK LIST FOLLOWED. PRELIMINARY UNCONTAINED BSDR CA010208014Hub · cracked(CAN) DURING THE POST FLIGHT INSPECTION BY AME A FINE LINE WAS NOTICED ON THE UPPER DAMPER ATTACH LUG. THE LUG WAS PAINT STRIPPED AND A DEFINITE CRACK CAN BE SEEN. STARTING NEAR THE BOLT HOLE PROGRESSING INBOARD FOR APPROXIMATELY 1 1/4 INCH. THE MAIN ROTOR HUSDR AC2A072773Nozzle · debondedMAIN ROTOR BLADES FAILED TO TURN BY SPECIFIED N1 SPEED UPON STARTING ENGINE. IT WAS DETERMINED THAT SOMETHING INSIDE OF TURBINE WAS RUBBING DUE TO SOUND COMING FROM TURBINE WHEN ROTOR WAS TURNED BACKWARDS. TURBINE WAS REMOVED AND DISASSEMBLED. IT WAS FOUND THASDR CA001108009Pump · worn(CAN) NR 2 ENGINE DECELLED IN-FLIGHT. INLET FUEL LINE TO FUEL PUMP (P/N 76307-02003-083) HAD WORN A GROOVE ON FUEL PUMP UNION (P/N AN919-19D). THIS ALLOWED AIR INTO THE FUEL SUPPLY SYSTEM. FUEL PUMP P/N 6896810 REPLACED. AN919-10D UNION REPLACED. ENGINE GSDR CA001108008Shaft · sheared(CAN) POWER OUTPUT SHAFT FOUND SHEARED AT THE THREADED END WHEN ENGINE WAS REMOVED FOR SCHEDULED MAINTENANCE. POSSIBLE CAUSE IS ENGINE DRIVESHAFT MISALIGNMENT - NEW SHAFT WAS INSTALLED ON ENGINE AND SHAFT ALIGNMENT CARRIED OUT ON REINSTALLATION OF ENGINE. (XSDR CA000925024Hydraulic Line · leaking(CAN) PRIOR TO TAKEOFF, NR 1 SERVO JAM LIGHT CAME ON. NR 1 HYDRAULIC SYSTEM LEVEL HAD DROPPED TO THE REFILL LINE AND ACTIVATED THE LOW LEVEL SWITCH. AFTER REMOVAL OF T/R COWLS, HYD FLUID WAS WIPED UP BUT NO CRACK COULD BE SEEN - FLUID LEVEL WAS TOPPED UP ANDSDR 20000719SH006Gear Shaft · mismanufacturedUPON ASSEMBLY OF GEARBOX WHEN INSTALLING COUPLING , FOUND COUPLING WOULD NOT SIT COMPLETELY, STAYED COCKED. REMOVED COUPLING AND INSPECTED. FOUND IMPROPER MACHINING OF COUPLING MATING SURFACE TO F/C GEAR WITH PIECES OF ROLLED METAL. FUEL CONTROL GEAR HAD ISDR CA000830043Case · cracked(CAN) MAINTENANCE WAS BEING PERFORMED ON THE ENGINE TO REPLACE THE COMBUSTION LINER. WHILE THE ENGINEER WAS REMOVING THE COMBUSTION CASE TO ACCESS THE LINER HE FELT A CRACK. VISUAL INSPECTION REVEALED A CRACK AT THE SEAM WELD ON THE SHOULDER OF THE CASE.TC; FESDR AC2A0000044Scroll · damagedENGINE WOULD NOT PASS LIMITING CHECK AS OUTLINED IN SIKORSKY S76 FLIGHT MANUAL. ENG ALSO REPORTED FOR LOW POWER. ENG REMOVED. UPON DISASSEMBLY OF TURBINE, 1ST STAGE TURBINE NOZZLE AND 1ST STAGE TURBINE WHEEL WERE FOUND DAMAGED FROM FOREIGN OBJECT PASSING THSDR AC2A0000054Scroll · crackedSCROLL ASSEMBLY CRACKED. REPLACED SCROLL. (X)SDR AC2A0000016Scroll · crackedSCROLL CRACKED AT NORMAL LOCATION. REPLACED SCROLL. (X)SDR HEEA065852Bearing · failedENGINE REMOVED DUE TO CYCLED OUT. GEARBOX REPAIRED DUE TO CEBA72-3217R-2.SDR HEEA065853Bearing · failedENGINE REMOVED DUE TO CYCLED OUT. GEARBOX REPAIRED DUE TO CEBA72-3217R-2. SERIAL NUMBERS REMOVED ARE CG0230 AND CG0222. REPLACED WITH SERIAL NUMBERS JJ02757 AND JJ02739.SDR HEEA065158Fuel Pump · failedNR 2 ENGINE SLOW TO START AFTER BEING SHUT DOWN FOR AN HOUR OR MORE.SDR HEEA065095Fuel Pump · wornFUEL PUMP HAD WORN INTERNAL SPLINES.SDR HEED064590Engine · making metalMETAL FOUND IN REAR MAG PLUG. REPLACED WITH ANOTHER ENGINE.SDR HEED064622Screen · brokenINTAKE SCREEN HAD BROKEN WIRE. REPLACED PART.SDR HEED064643Fcu · failedUNABLE TO CONTROL START LIGHT OFF TEMPERATURES. REPLACED FCU.SDR HEED064588Engine · making metalENGINE ASSEMBLY MAKING METAL. REPLACED WITH ANOTHER ENGINE.SDR HEEA064466Carbon Seal · damagedENGINE REMOVED DUE TO SMOKE ON SHUTDOWN. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: GROOVED SLOTS AND TANGS BEYOND SERVICEABLE LIMITS ON CARBON SEAL ASSY. NEW PART INSTALLED.SDR HEEA064467Spur Gear · wornENGINE REMOVED DUE TO SMOKE ON SHUTDOWN. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: STEP WEAR ON SPUR GEARSHAFT AFT END SPLINES BEYOND SERVICEABLE LIMITS. NEW PART INSTALLED.SDR CA991008002Line · cracked(CAN) FUEL LINE CRACKED AT FERREL PRIOR TO FUEL FILTER.SDR CA990907020Pivot Shaft · wrong part(CAN) PIVOT SHAFT ASSY INTERNAL PARTS ARE OF QUESTIONABLE ORIGIN AND DO NOT RESEMBLE THE MANUFACTURER'S TYPE. ALTHOUGH THESE PARTS DID NOT RESULT IN FAILURE, A SIMILAR PART DID FAIL WHICH WAS REPORTED VIA SDR NR 990505001.SDR 99ZZZX3558Chip Plug · leakingUPON INSPECTION, BEFORE INSTALLING PART, FOUND TIP OF CHIP DETECTOR TO HAVE A HOLE IN IT.SDR HEEA063667Gearshaft · wornENGINE REMOVED DUE TO 2,000 HOUR INSPECTION. UPON INSPECTION OF COMPRESSOR PARTS NOTED: STEP WEAR BEYOND LIMITS ON SPUR GEAR AFT END SPLINES. INSTALLED NEW SPUR GEARSHAFT.SDR HEEA063670Gearshaft · wornENGINE REMOVED DUE TO SMOKING AND BURNING OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED: STEP WEAR BEYOND LIMITS ON SPUR GEAR AFT END SPLINES. INSTALLED NEW SPUR GEARSHAFT.
Back to Allison 250-C30S