Allison 250-C20B
Service difficulty reports · 1,981
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 = '250C20B' 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 = '250C20B' 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 2007FA0000862Retaining Ring · fracturedOPERATOR REPORTED ENGINE CHIP LIGHTS AND A PRECAUTIONARY LANDING WAS MADE. INSPECTION OF ENGINE CHIP DETECTORS REVEALED ONE SMALL PIECE OF THE FAILED RETAINING RING HAD CAUSED THE LIGHT. THE COMPRESSOR WAS REMOVED FROM THE ENGINE AND FURTHER INVESTIGATION RESDR CA070807008Drive Shaft · sheared(CAN) APPROX 1 HR INTO FLIGHT, COCKPIT NR WARNING HORN CAME ON INTERMITTENTLY. NR GAUGE BEGAN GIVING ERRATIC INDICATIONS, BEFORE PROGRESSIVELY DECAYING DOWN TO A STABILIZED READING OF 30 PERCENT. AFTER LANDING, A VISUAL INSP REVEALED A LARGE AMOUNT OF HYDRAUSDR CA070612005Bearing · failed(CAN) FOUND METAL ON BOTH CHIP PLUGS AND THEN FOUND THAT THE 2.5 BEARING HAD STARTED TO FAIL. REPLACED BEARING AND INNER RACE OF SPUR ADAPTER. NO FURTHER PROBLEMS. (TC NR 20070612005)SDR CA070523007Pin · broken(CAN) PIN FOUND BROKEN AT FIRST THREAD / SHANK. NUT WAS CAPTURED IN THE HANDLE CLIP.SDR CA070522002Strut · cracked(CAN) DURING AN ANNUAL INSPECTION OF THE AIRCRAFT IT WAS NOTICED THAT THE LANDING GEAR HAD SOME PLAY IN IT. UPON FURTHER INSPECTION THE ENGINEER FOUND THAT THE BRACE TO STRUT BOLT HAD SOME SLOP IN IT. THE ENGINEER REMOVED THE BRACE BOLT AND FOUND 3 CRACKS EMSDR CA070522001Spring · broken(CAN) COMING OUT OF A MAJOR INSPECTION WHERE THE EJECTION SPRING ON ALL THE COWLS (P/N 105-62648, 105-62664, 105-62643 AND 105-62663) WERE REPLACED, SEVERAL EJECTION SPRING P/N V40GT39-1-1AA WERE BREAKING IN TWO PIECES. THIS PROBLEM HAPPENED STATICALLY AND INSDR 2007FA0000473Blade · crackedSKIN CRACKS WERE DISCOVERED IN THIS BLADE UPON INVESTIGATION OF AN UNUSUALLY HIGH VIBRATION LEVEL AS REPORTED BY THE PILOT. THE ONE-PER-REV VERTICAL VIBRATION WAS ESPECIALLY NOTICEABLE DURING THE LANDING PHASE OF FLIGHT. INSPECTION OF THIS BLADE REVEALED CORSDR CA070508003Pin · bent(CAN) DURING AN INSPECTION THE ENGINEER NOTICED THE THE M/R BLADE FOLDING PIN LOOKED BENT. UPON TAKING THE UNIT APART HE NOTICED THAT THE THREADS OF THE PIN WERE NOT ON THE PIN STRAIGHT, KIND OF LOPSIDED. (TC NR 20070508003)SDR 20070011Turbine Nozzle · separatedAFTER TAKEOFF TO PERFORM MAINTENACE M/R TRACK AND BALANCE IT WAS REPORTED TO PILOT, BY ANOTHER AIRCRAFT, THAT HE HAD SMOKE TRAILING HIS AIRCRAFT. EMERGENCY PROCEDURES WERE PEREFORMED AND AIRCRAFT LANDED WITHOUT INCIDENT. THE SMOKE WAS DISCOVERED TO BE ENGINESDR 2007FA0000400Bearing · failedDURING FLIGHT THE UPPER CHIP PULL ILLUMINATED, IT WAS CLEANED IAW MM AND RETURNED TO SERVICE. A COUPLE OF HOURS LATER, A SECOND LIGHT ILLUMINATED. FOUND LOTS OF FINE CHIPS. REPLACED ENGINE. FOUND NR 1 BEARING BAD. (K)SDR 2009FA0000507Spring · defectiveDURING LEVEL FORWARD FLIGHT, A SPRING INSIDE THE PT GOVERNOR FAILED, CAUSING THE ENGINE TO GO TO IDLE. AN AUTOROTATION WAS REQUIRED AND WAS DONE SO INTO A SOFT PLOWED FIELD. THE HELICOPTER TURNED OVER AFTER SKIDDING A SHORT DISTANCE.SDR BAQ2007F00000Shield · failedTHE AIRCRAFT WAS ON A MAINTENANCE FLIGHT FOR ROUTINE TRACKING AND BALANCING FOLLOWING A MAIN ROTOR BLADE REPLACEMENT. THE NR 2 ENGINE OIL TEMPERATURE WAS OBSERVED TO BE APPROXIMATELY 15 DEGREES HIGHER THAN THE NR 1 ENGINE OIL TEMPERATURE. ALL OTHER ENGINE PASDR CA070423001Bearing · failed(CAN) DURING PERFORMANCE OF A 100/300 HOUR INSPECTION OF THE AIRCRAFT AND IN PARTICULAR THE MAIN ROTOR BLADES. THE ENGINEER FOUND THAT THE PENDULUM ABSORBER OF THE RED MAIN ROTOR BLADE WAS EXTREMELY ROUGH. UPON DISASSEMBLY OF THE PENDULUM ABSORBER IT WAS SDR PHA2007F00000Support · crackedAFTER A REFUELING STOP ON A PART 91 FLIGHT, THE PILOT PLACED HIS FEET ON THE TAIL ROTOR PEDALS AND FELT THEM MOVE. HIS INSPECTION REVEALED THAT 3 OF THE 4 MOUNT LOCATIONS FOR THE LT TAIL ROTOR PEDAL SUPPORT WERE BROKEN OFF OF THE SUPPORT. THE UPPER LT, LOWERSDR 2007FA0000330Combustion Case · crackedPILOT NOTICED CRACK IN COMBUSTION CAN ON PREFLIGHT CHECK REPLACED UNIT. (K)SDR 2007FA0000321Exciter · inoperativePILOT WENT TO START THE AIRCRAFT AND THERE WAS NO IGNITION. FOUND IGNITION EXCITER INOPERATIVE, REPLACED. (K)SDR CA070321011Mast · corroded(CAN) DURING ANNUAL INPECTION OF INTERIOR OF MAST, CORROSION AND PITTING WERE DISCOVERED. MAST WAS REMOVED AND SENT TO AN OVERHAUL FACILITY FOR REPAIR. (TC NR 20070321011)SDR 2007FA0000285Governor · frozenDURING AN INSPECTION IT WAS NOTED THAT THE BEAING RETAINING WASHER FOR THE ROD END WAS INCORRECT. AFTER THE BOLT WAS REMOVED IT WAS THEN DISCOVERED THAT THE THROTTLE ARM WAS SEIZED UP ON THE GOVERNOR, REPLACED GOVERNOR. (K)SDR CA070302004Cone Set · failed(CAN) MAIN ROTOR TORQUE CHECK WAS PERFORMED ON M/R MAST NUT BETWEEN 3 TO 8 FLIGHT HOURS IAW THE MM CHAPTER 5, AND MM, SECTION 62-7, PARAGRAPH 5. INITIAL TORQUE CHECK OF MAST NUT TORQUE WAS FOUND BELOW MINIMUM SPECIFIED TORQUE OF 250 FT/LBS, IAW MM. A SUBSESDR CA070306002Coupling · leaking(CAN) C-GELT`S MAIN DRIVESHAFT P/N 206-040-015-103, S/N A-1331, 600 HR INSPECTION AND REPACK C/W FEB 22/07 AT 13635.5 HRS. TEST FLOWN 0.3 HRS, FLEW 7.1 HRS FEB 24 AND 25, ENGINEER FOUND TRANS. SIDE LEAKING GREASE AND COUPLING OVERHEATED. DRIVE SHAFT S/N A-2441SDR CA070125004Bearing · fractured(CAN) UPON LANDING AT THE MAINTENANCE BASE AND FOLLOWING HELICOPTER BEING SHUTDOWN, THE PILOT WAS EXITING AND LEAVING THE AIRCRAFT HE NOTICED THAT THE M/R PENDULUM ABSORBER ON THE YELLOW MAIN ROTOR BLADE WAS IN THE HORIZONTAL POSITION. CLOSER INSPECTION REVEALSDR CA070131004Blades · out of balance(CAN) COULD NOT ACHEIVE DYNAMIC BALANCE OF A/C. (TC NR 20070131004)SDR CA070119005Switch · shorted(CAN) AIRCRAFT IS IN CRUISE FLIGHT WHEN PILOT SELECTED NR 1 AND NR 2 ANTI-ICE (ON) DUE TO THE OAT AND VISIBLE MOISTURE. ON SHORT FINAL TO THE BASE THE PILOT SELECTED BOTH ANTI-ICE SWITCHES TO THE (OFF) POSITION. IMMEDIATELY UPON ACTIVATING NR 1 SWITCH TO (OFFSDR CA070118006Blade · cracked(CAN) THE UPPER BLADE SURFACE IS CRACKED CHORDWISE FROM LEADING EDGE TO TRAILING EDGE BETWEEN BLADE STATION 120 AND 124. THE LOWER BLADE SURFACE IS ALSO CRACKED IN THE MID CORD AREA BETWEEN STATION 120 AND 124 BUT DOES NOT EXTENT TO THE LEADING EDGE OR TRAILINSDR EOO2006F00001Snap Ring · damagedREMOVED COMPRESSOR FOR INSPECTION, FOUND DAMAGED SNAP RING GROOVE IN IMPELLER SPUR GEAR ADAPTOR SHAFT. SENT UNIT OUT FOR REPAIRS. (K)SDR 10923RX1206TBSkin · crackedDURING PRE-FLIGHT VISUAL INSPECTION OF AIRCRAFT A 2.2500 INCH VERTICAL CRACK IN TAIL BOOM SKIN LOCATED ALONG CENTER WATERLINE, 15 INCHES AFT OF THE RT HORIZONTAL STABILIZER TORQUE TUBE WAS FOUND. INSPECTED AREA, FABRICATED TEMPORARY REPAIR IAW MFG CUSTOMER SUSDR 2006FA0001085Bearing · spalledVISIBLE LINE FOUND ON 2.5 BEARING ROLLERS MATCHING SPALLING FOUND ON SAG SHAFT (SDR DATED 3/NOV/2006). GEARBOX INSTALLED 6/SEPT/2006. TIME IN SERVICE FOR GEAR BOX, 105.1 HOURS. 2.5 BEARING INSTALLATION TIMES NUT SHOWN ON ENGINE CARDS. 2.5 BEARING IS A PMA SDR 2006FA0001087Shaft · spalledFOUND SPALLING ON BEARING RACE AT 2.5 BEARING CONTACT POINT. FOUND VISIBLE LINE ON 2.5 BEARING ROLLERS MATCCHING SPALL LINE ON SAG SHAFT. COMPRESSOR ASSY INSTALLED ON AC 6/SEPT/2006, TIME IN SERVICE SINCE INSTALLATION OF COMPRESSOR ASSY 105.1 HOURS, 220 CYCLSDR CA061115007Skin · cracked(CAN) DURING SCHEDULED MAINTENANCE, IN COMPLIANCE WITH CF-91-35 (CABIN ROOF BOXBEAM INSPECTION), A CRACK WAS DISCOVERED IN THE BOXBEAM LOWER SKIN ORIGINATING FROM AN INSPECTION PANEL CUT-OUT RIVET HOLE. THIS SKIN WAS CRACKED ACROSS THE RIVET HOLE ABOUT 1.25 SDR CA070227011Control Lever · stiff(CAN) ON A FUCTIONAL CHECK OF THE GOVERNOR CONTROL THERE APPEARED THAT THE CONTROL LEVER ON THE GOVERNOR WAS HARD TO MOVE. THIS WAS CONFIRMED AND THE GOVERNOR WAS REMOVED FOR REPAIR. (TC NR 20070227011)SDR CA070119002Governor · failed(CAN) THE GOVERNOR WAS INSTALLED WITH ZERO TSN. GROUND RUNS AND RIGGING WERE CARRIED OUT IAW THE MM WITH NO DIFFICULTIES. THE AIRCRAFT WAS FLOWN AND IT WAS NOTICED BY THE PILOT THAT HE WAS ALWAYS CHASING THE N2 TO KEEP IT WITHIN LIMITS (ERRATIC N2 OPS). THE ERSDR CA070119008Fcu · failed(CAN) THE AIRCRAFT WAS STARTED AND WARMED UP. THE PILOT THEN BEGAN TO SPOOL THE AIRCRAFT UP FROM GROUND IDLE TO FLIGHT IDLE, HOWEVER NOTHING HAPPENED. THIS WAS TRIED A FEW TIMES BUT STILL NO RESPONSE. OTHER TROUBLESHOOTING WAS PERFORMED WITH NO FINDINGS. THE FSDR 2006FA0001086Support · corrodedDURING ANNUAL INSPECTION PEDAL SUPPORT WAS FOUND WITH CORROSION ON LOWER BOLT PADS BEYOND REPAIRABLE LIMITS. REPLACED SUPPORT BRACKET WITH SERVICEABLE PART. (K)SDR CA061011010Clutch · cracked(CAN) 2 SPRAG RETAINER WERE CRACKED, THEREFORE ALLOWING MISALIGNMENT AND CAUSING A NOISE. (TC NR 20061011010)SDR CA061004007Insert · cracked(CAN) IN COMPLIANCE WITH CF-2006-12 THE VERTICAL FIN WAS INSPECTED WITH 10X MAGNAFLYING GLASS AND THEN WAS LPI INSPECTED AND A CRACK WAS FOUND ON ONE OF THE INSERTS. THE FIN WAS SENT OUT FOR REPAIR. (TC NR 20061004007)SDR CA060925007Shaft · sheared(CAN) PILOT REPORTED THAT THE STARTER WOULD NOT TURN THE ENGINE, IT WOULD JUST SPIN. MAINTENANCE FOUND THAT THE SHAFT ON THE STARTER HAD BEEN SHEARED. STARTER HAD BEEN REPLACED AND AIRCRAFT RETURN TO SERVICE. (TC NR 20060925007)SDR 2006FA0000957Impeller · damagedDURING REPLACEMENT OF THE S16 SHAFT, IT WAS DISCOVERED THAT THE OUTER LAND OF THE SNAP RING GROOVE WAS VERY THIN AND THE INNER EDGE WAS LIFTING AND (2) .3750 INCH LONG PIECES CAME OFF OF THE LAND. WHEN THE SNAP RING WAS REMOVED THE GROVE FOR THE SNAP RING SESDR 2006FA0000958Turbine Wheel · damagedFOUND NR 1, AND NR 2 TURBINES RUBING AFTER ENGINE DISASSEMBLY FOR CHIPS. DURING 100 HR CHIPS WERE FOUND ON THE CHIP PLUGS. DISASSEMBLED ENGINE AND DISCOVERED THE N1 AND N2 TURBINES WERE RUBBING, REPLACED UNIT. (K)SDR 2006FA0000959Gearbox · making metalFOUND PTO , PTO BALL BEARING AND TORQUEMETER SPALLED. FOUND CHIPS ON CHIP PLUGS. DISASSEMBLED GEAR BOX AND FOUND PTO GEAR, TORQUEMETER GEAR AND PTO BALL BEARING SPALLED. REPLACED GEARBOX. (K)SDR CA070227007Control Lever · stiff(CAN) THE CONTROL LEVER SHAFT ON THE GOVERNOR WAS FOUND HARD TO MOVE. SO STIFF THAT THE LINEAR ACTUATOR HAD TO WORK HARD TO MAKE IT TO MOVE. (TC NR 20070227007)SDR HEEA111184Guide · unknownWHILE ENROUTE, HYD BLOCK AND HYD ONE LIGHTS ILLUMINATED. REPLACED GUIDE ASSY.SDR 2006FA0000947Combustion Case · crackedPILOT COMPLAINED THAT THE TOT SUDDENLY WENT 40 DEGREES C, HOT. FOUND OUTER COMBUSTION CAN CRACKS. REPLACED UNIT. (K)SDR 2006FA0000948Case · erodedFOUND CASE HALVES SHOT. ENGINE RUNNING 35 DEGREES C, HOT. (K)SDR CA060829001Fitting · corroded(CAN) DURING INSPECTION, A LEAK WAS DISCOVERED IN THE HYDRAULIC SYSTEM PRESSURE SIDE CROSS FITTING (AN 937-D6). DISASSEMBLY REVEALED CORROSION AT MATING SURFACE OF O-RING AND CROSS. PART REPLACED WITH NEW. O-RINGS AND RETAINING RING REPLACED. SYSTEM SERVICED SDR 2006FA0000870Governor · malfunctionedPILOT OBSERVED ENGINE RPM DROOPED TO APPROX 98 PERCENT N2 AND WOULD NOT BEEP UP. THIS CAUSING LOW ROTOR WARNING TO ILLUMINATE, AS WELL AS AUDIO WARNING TO SOUND. PILOT ENTERED AN AUTO ROTATION AND OBSERVED THE ENGINE SURGING AS HE APPROACHED THE GROUND. NORSDR CA060811002Belt · worn(CAN) ON APPROACH TO LAND THE PILOT HEARD A NOISE TO THE REAR OF THE AIRCRAFT FOLLOWED BY A VIBRATION. UPON INSPECTION THE ENGINEER NOTICED THE OIL COOLER BLOWER BELT TENSION WAS LOOSE AND THE TEETH OF THE BELT WERE WORN. (TC NR 20060811002)SDR CA060804010Bearing · cracked(CAN) 369D25146 ROLLER BEARING INNER RACE CRACKED, THIS RACE IS PRESSED ONTO TRANSMISSION T/R O/P PINION WITH AN INTERFERENCE FIT. CRACKED INNER RACE CAUSED THE RACE TO SPALL AND CAUSED A CHIP LIGHT. SEVERE METAL CONTAMINATION WAS FOUND (TC NR 20060804010)SDR CA060717006Lock · unserviceable(CAN) PILOT NOTICED FEEDBACK THRU CYCLIC CONTROL FROM MAIN ROTOR HEAD. HELICOPTER WAS LANDED AT MAIN BASE AND SERVICEABLE UNLOCK WAS INSTALLED TSO 00.0 AND TESTED SATISFACTORY. UNSERVICEABLE UNILOCK WILL BE SENT IN FOR OVERHAUL WITH A TEARDOWN REPORT REQUESSDR CA060717008Window · detached(CAN) HELICOPTER WAS CLIMBING OUT AT 70 KTS WHEN THE RT FWD DOOR WINDOW IMPLODED INTO THE CABIN. UPON INVESTIGATION IT WAS FOUND THE WINDOW INSTALLED REQUIRED A RUBBER GASKET TO HOLD IT IN. THINKING IT WAS A MD WINDOW IT WAS INSTALLED WITH THE ORIGINAL FRAME.SDR KBM2006F00233Hose · leakingFREE WHL RETURN HOSE ASSY (FREE WHL TO FIREWALL) LEAKING. REMOVED AND REPLACED. (K)
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