Allison 250-C20
Service difficulty reports · 945
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 = '250C20' 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 = '250C20' 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 CA970311061Stiffener · chafed(CAN) STIFFENER HAD EXCESSIVE CHAFING DAMAGE CAUSED BY ENGINE OIL TANK DRAIN LINE.SDR CA970311062Longeron · misrepaired(CAN) AN UNAPPROVED REPAIR WAS INCORPORATED ON THE ENGINE LONGERON. THE STRUCTURAL REPAIR MANUAL DOES NOT ALLOW REPAIR OF THIS ASSY.SDR CA970311065Support · corroded(CAN) SUPPORT CORRODED BEYOND REPAIRABLE LIMITS.SDR CA970311066Support · cracked(CAN) SUPPORT WAS CRACKED IN FORWARD UPPER RIGHT HAND RADIUS. NO CRACKS ALLOWED IN THIS AREA. DAMAGE ONLY VISIBLE WITH FUEL CELL REMOVED. AIRCRAFT TT: 14,949 HOURS.SDR CA970311063Stiffener · cracked(CAN) THE STIFFENER THAT IS LOCATED BENEATH THE DOUBLER FOR EXTERNAL SCAVENGE OIL FILTER KIT WAS FOUND CRACKED. ONE OF THE NUTS HOLDING THE OIL FILTER WAS LOCATED TOO CLOSE TO THE RADIUS OF THE STIFFENER WHICH WAS THE CAUSE OF THE CRACKSDR CA970311064Bulkhead · cracked(CAN) BULKHEAD FOUND CRACKED BEYOND REPAIRABLE LIMITS.SDR CA970327011Bolt · misinstalled(CAN) SERVO SENT FOR REPAIR. PER AD CF96-11R2 AND BELL SB 206-67A-01, A BOLT WAS FOUND SUSPECT. UNIT REPAIRED, BOLT REPLACED.SDR CA970311060Nut · cracked(CAN) UPON TRANSMISSON REPLACEMENT, R/H PYLON SUPPORT PAD NUT WAS FOUND CRACKED. L/H PYLON SUPPORT WAS WORN AND POSSIBLE CAUSE OF CRACKING DUE TO POUNDING.SDR CA961112006Rigid Line · broken(CAN) THE PILOT WAS AT LOW ALTITUDE WHEN THE ENGINE FLAMED OUT. HELICOPTER WAS SUBSTANTIALLY DAMAGED. INVESTIGATION FOUND RIGID LINE BROKE OFF THE END OF FERRULE ON LINE CAUSING THE N1 TO COME DOWN TO 35 PERCENT N1. RIGID LINE SENT FOR TESTING BUT SUBMITTER SUSDR CA961112050Blade · punctured(CAN) DURING A SLOW LOW LEVEL TURN THE PILOT EXPERIENCED AN ABRUPT VIBRATION IN THE TAIL ROTOR PEDALS. UPON INVESTIGATION AN AN3-3A BOLT WAS FOUND EMBEDDED IN THE LEADING EDGE OF THE TAIL ROTOR BLADE. THE BOLT HAD COME LOOSE FROM THE TAIL ROTOR GEARBOX FAIRINGSDR CA961029012Filter · collapsed(CAN) AIRCRAFT LOST POWER IN-FLIGHT, BUT LANDED WITHOUT INCIDENT. UNABLE TO RESTART. THE SCREEN FILTER WAS FOUND COLLAPSED.SDR CA970311055Skid Tube · punctured(CAN) PUNCTURE OF BOTTOM OF SKID TUBE, FORWARD OF SADDLE.SDR CA961125015Switch · intermittent(CAN) SWITCH WOULD NOT ENGAGE STARTER WHEN DEPRESSED. STARTER BUTTON ENGAGED WHEN MOVED FROM SIDE TO SIDE.SDR HEEA968220Spline Adapter · below limitsRECEIVING INSPECTION REVEALED: MEASURED .0034 BELOW MINIMUM LIMITS OF .8994 ON COUPLING'S EXTERNAL SPLINES. SERIAL NUMBER 65243 AND S/N 65246 9-17-96 AND SERIAL NUMBER 64938SDR HEEA968228Shield · defectiveRECEIVING INSPECTION REVEALED: .050 OUT OF FLATNESS BETWEEN #1 NOZZLE SHIELD OUTER BAND AND INNER BAND.SDR 96ZZZX5548Module · fod damageDURING A ROUTINE 100-HOUR INSPECTION, FOD DAMAGE FOUND TO RT ENGINE AXIAL COMPRESSOR ROTORS AND STATOR VANES. UNABLE TO ESTABLISH EXACT SOURCE OF FOD. OPERATOR TO REVIEW CURRENTLY USED LANDING SITES.SDR CA970311058Tach Generator · surging(CAN) ENGINE RPM INDICATOR SURGING 10-15 PERCENT. N1 TACH GENERATOR REMOVED, FOUND WIRE CHAFED (TO GROUND) UNDER ELECTRICAL CONNECTOR CAP.SDR CA970311067Skid · missing(CAN) FOLLOWING FLIGHT, IT WAS NOTED THAT THE TAIL SKID ASSY WAS MISSING. NO DAMAGE WAS FOUND TO VERTICAL FIN OR TAIL SKID ATTACHEMENT FITTING.SDR CA970311003Liner · missing(CAN) DURING CASE HALF INSPECTION, 3 LARGE PIECES OF LINER NOTED AS MISSING IN 4TH STAGE AREA .SDR CA970311006Governor · leaking(CAN) FUEL LEAKING AT THE SHAFT TO BODY SEAL.SDR CA970311008Governor · leaking(CAN) FUEL LEAKING FROM GOVERNOR BODY.SDR CA970311049Swashplate Assy · leaking(CAN) SWASHPLATE SPEWING EXCESSIVE AMOUNT OF GREASE. PREVIOUSLY REMOVED FOR SAME REASON. 99.5 HOURS THIS INSTALLATION.SDR CA961024018Switch · malfunction(CAN) MAIN ROTOR TRANSMISSION PRESSURE LIGHT ON ALL THE TIME. CHANGED PRESSURE SWITCH.SDR CA960827011Blade · bulged(CAN) ON INSPECTION, BULGE FOUND IN BLADE SKIN APPROXIMATELY 12 INCHES LONG X 2.5 INCHES WIDE X 0.5 INCH HIGH NEAR TRAILING EDGE OF BLADE AT THE TIP.SDR CA960827012Blade · peeling paint(CAN) EXCESSIVE PEELING OF PAINT ON THE UNDERSIDE OF THIS BLADE NEAR THE TIP. THIS BLADE ALSO PRODUCES WHISTLING NOISES THAT CAN BE HEARD FROM INSIDE THE CABIN DURING ROTOR RUNDOWN AFTER THE ENGINE IS STOPPED.SDR ERAA96300Nozzle · defectiveOVERHAULED AND REC'D BACK AT ERA 8-5-96. SEAL AND TIP PATHS WON'T RUN OUT WITHIN LIMITS.SDR ERAA96292Nozzle · defective#2 NOZZLE WAS OVERHAULED. ERA REC'D BACK AT ERA 7-18-96. SEAL BORE TOO LARGE. PROTRUSIONS ON THE INNER BAND, NEEDS TO BE REMOVED.SDR HEEA967651Shaft · mis markedRECEIVING INSPECTION REVEALED: DUPLICATE SERIAL NUMBER ON SPUR GEAR.SDR CA960826026Bearing · overheated(CAN) PILOT REPORTED STIFFNESS OF CYCLIC CONTROL. AFTER SHUTDOWN, CYCLIC WAS VERY DIFFICULT TO MOVE AND SWASHPLATE WAS HOT. CONTROLS DISCONNECTED AT SWASHPLATE AND BEARING ROUGHNESS NOTED. GREASE PURGED BUT BEARING STILL ROUGH.SDR CA960919001Transmission · broken pin(CAN) CHECK OF THE MAST MOVEMENT ON THE GROUND WAS EXCESSIVE AS IF THE ISOLATION MOUNT WAS NOT WORKING. A CLOSER INSPECTION SHOWED THE PIN ASSEMBLY TO BE BROKEN.SDR CA960924035Switch · inoperative(CAN) WITH PRESSURE FROM BOOST PUMP ON, SWITCH WOULD NOT OPEN CIRCUIT AND PANEL LIGHT WOULD STAY ON.SDR ERAA96286Pt Support · defectivePT SUPPORT OVERHAULED 7-3-96. REAR SUMP COVER NOT SECURE TO SUPPORT. EVALUATE CRACKS ADJACENT TO 6 O'CLOCK STRUT.SDR AU961040Governor · faulty(AUS) ENGINE N2 GOVERNOR FAULTY - SUSPECT INTERNAL FAILURESDR AU961111Turbine Wheel · cracked(AUS) FIRST STAGE TURBINE WHEEL CRACKED - TURBINE LABYRINTH SEAL PICKED UP ON STATIONARY SEAL - SECOND STAGE NGV PNO 6878426 CRACKED INCURVIC COUPLINGSDR CA970311019Vertical Stab · insert failed(CAN) INSERT FAILURE AND SURROUNDING HONEYCOMB DAMAGED.SDR AU960999Pipe · cracked(AUS) ENGINE TORQUE SYSTEM ALUMINIUM PIPE CRACKED AND LEAKING - AIRCRAFT IMPORTED FROM SOUTH AFRICASDR CA960812015Transmission · making metal(CAN) TRANSMISSION MAKING METAL. 155.9 HOURS OUT OF OVERHAUL.SDR CA960826040Transmission · failure(CAN) METAL ON CHIP DETECTOR INDICATING INTERNAL FAILURETRANSMISSION REPLACEDSDR CA970311026Gerarbox · making metal(CAN) POOR GEAR PATTERN CAUSED FUZZ ON CHIP PLUG. INPUT SEAL AND PITCH SEALS LEAKING.SDR CA970311027Swashplate Assy · unbonded(CAN) UPPER SEAL CAME UNBONDED FROM OUTER CAP P/N 206-010-444-001 ALLOWING IT TO SPIN IN METAL TO METAL.SDR ERAA96282Governor · faultyGOVERNOR WAS OVERHAULED. PART HAS 587.3 HRS TSO AND IS VERY SLOW, WILL NOT KEEP UP WITH OTHER GOVERNOR. TORQUE SPLITS WITH HIGH TORQUE.SDR ERAA96279Governor · faulty#ONE ENGINE WOULD DROP OFF LINE ABOVE IDLE SETTING CAUSING MORE THAN 12% TORQUE SPLIT. GOVERNOR WAS SET AS FAST AS POSSIBLE. GOVERNOR HAS 895.8 HRS SINCE O/H 2/28/95.SDR ERAA96280Governor · defectiveTORQUE SPLITS UP TO 30%. GOVERNOR WAS O/H 9/21/95.SDR CA970311018Vertical Stab · cracked(CAN) FIN STRUCTURE CRACKED ADJACENT TO UPPER ATTACHMENT INSERTS.SDR CA970311020Generator · worn(CAN) COMMUTATOR WORN.SDR CA970311017Doubler · damaged(CAN) FUEL CELL DOUBLERS DAMAGED.SDR CA960717007Compressor · cracked(CAN) SUSPECT POSSIBLE SEPARATION OF FIRST STAGE STATOR BLADES CAUSING EXTENSIVE DAMAGE TO COMPRESSOR AND TURBINE AND ENGINE FAILURE. PART TC: 6,604.SDR ERAA96269Nozzle · defectiveOUTER BAND AND VANE CRACKS.SDR ERAA96270Nozzle · defectiveCRACKS IN DIAPHRAGM AND WARPED VANES.SDR ERAA96271U Ring Gasket · splitU RING SPLIT. RETURNING TO SUPERIOR.
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