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 99ZZZX4091Governor · malfunctionedSLOW TO RECOVER FROM N2 DROOP.SDR 99ZZZX4569O-Ring · failedUPON DISASSEMBLY OF UNIT, FOUND O-RING HARD AND BRITTLE. ALL O-RINGS BRITTLE AND HARD - POSSIBLE EXTREME HEAT.SDR CA991027036Bearing · failed(CAN) POST-FLIGHT INSPECTION OF FREEWHEELING UNIT REVEALED THAT THE FORWARD CAP BEARING WAS FOUND IN PIECES. FREEWHEELING THROUGH SHAFT WAS SCORED/OVERHEATED. FOLLOWING DISASSEMBLY AT LABORATORY FOR METALLURGICAL TESTS, THE ENGINEERING REPORT STATED THAT A SSDR CA991209004Fitting · cracked(CAN) HORIZONTAL STABILIZER FITTING FOUND CRACKED.SDR CA990927066Planetary Axle · spalled(CAN) PLANETARY REDUCTION GEAR SPALLING FOUND ON IMPORT INSPECTION.SDR CA991007038Nozzle · cracked(CAN) FIRST STAGE NOZZLE FOUND CRACKED ON THE OUTER BAND AT APPROXIMATLY 5 O'CLOCK POSITION.SDR CA991008032Hole · elongated(CAN) DURING INSPECTION, MOVEMENT BETWEEN ADAPTER AND OIL COOLER IMPELLER SHAFT WAS FOUND. ATTACHMENT IS BY TAPERED PIN WITH HOLES DRILLED IN SHAFT ADAPTER. UPON DISASSEMBLY, ALL DRILLED HOLES AND TAPERED PIN WAS FOUND WORN.SDR CA991229050Governor · failed(CAN) ENGINE OVERSPEEDS AND RECOVERS VERY SLOWLY.SDR CA990915040Bearing · failed(CAN) ABNORMAL NOISE JUST PRIOR TO SHUTDOWN NOTED. LATER DETERMINED THAT NOISE EMANATED FROM FREEWHEEL UNIT FORWARD SUPPORT BEARING. FURTHER DISASSEMBLY REQUIRED TO DETERMINE THE FULL EXTENT OF THE DAMAGE.SDR CA990915059Bearing · wrong part(CAN) BOTH ARMATURE SUPPORT BEARINGS REMOVED AND APPEAR TO BE SUB-STANDARD AND UNAPPROVED. ONE BEARING WAS FOUND GLUED INTO THE BEARING LINER WITH A LOCTITE-LIKE SUBSTANCE. APPROVED BEARINGS MFD'D BY OEM (LUCAS.)SDR CA990915052Combustion Can · cracked(CAN) CRACK FOUND IN OUTER COMBUSTION CAN RUNNING HORIZONTALLY IN ARM PIT AREA. CRACK RUNS THROUGH WELDED MESH PATCH.SDR CA990907023Fcu · leaking(CAN) FUEL CONTROL LEAKING AT IDLE ADJUSTMENT SCREW. THROTTLE CONTROL HAD NO EFFECT ON NR WHICH REMAINED AT 100 PERCENT DUE TO THE CONDITION.SDR CA991229047Sensor · failed(CAN) LOW ROTOR WARNING LITE AND HORN ACTIVATED WITH THE RPM AT 100%. UNIT REPLACED.SDR CA990915047Bolt · wrong part(CAN) WHILE COMPLYING WITH AD CF-95-11R2 AND BELL SB 206-67A-01, THE BOLTS IN THE LINKAGE ASSY WERE SUSPECTED TO BE UNAPPROVED WHICH WAS LATER CONFIRMED FOR THIS UNIT.SDR CA991229048Pitch Link · damaged(CAN) INSPECTION OF M/R PITCH LINKS REVEALED DAMAGE IN AREA OF THE LOCKWIRE TAB LOCK. PITCH LINKS REPLACED.SDR CA991027057Roll Pin · wrong part(CAN) DOOR HANDLE CAME OFF SEVERAL TIMES. IT WAS DISCOVERED THAT THE WRONG PIN WAS INSTALLED. PROPER PIN INSTALLED.SDR CA990907002Support · cracked(CAN) CRACK FOUND AT RELIEF HOLE ON THE CYCLIC PIVOT SUPPORT. CAUSE OF CRACK THOUGHT TO BE OVER TIGHTENING TO COMPENSATE FOR WORN PIVOT BEARINGS.SDR CA990812044Nut · missing(CAN) DURING ROUTINE INSPECTION, IT WAS NOTED THAT THE BOLT P/N LWB-22-6-58 THAT HOLDS THE END OF THE HYDRAULIC DAMPER WAS PROTRUDING. FURTHER INVESTIGATION REVEALED THE NUT P/N FN22M-624 AND WASHER P/N WP22-6 WERE MISSING.SDR CA990812045Stack · cracked(CAN) MIS-ALIGNMENT OF EXHAUST STACKS FROM PREVIOUS INSTALLATION CAUSED PREMATURE CRACKING.SDR CA990812046Eductor · cracked(CAN) CRACKS WERE DISCOVERED WHEN 50 HR INSP C/O.SDR CA991027061Drag Pin · failed(CAN) STAKING ON THE DRAG PIN FAILED 35.6 HOURS AFTER INSTALLATION.SDR CA991027059Combustion Case · cracked(CAN) CRACK FOUND IN ARMPIT OF THE OUTER COMBUSTION CASE. CRACK WAS ABOUT 2 INCHES LONG.SDR CA990728001Antenna · broken(CAN) ELT ANTENNA IS LOCATED ON REAR DOGHOUSE COWLING. THIS TEL 82 ELT P/N 82101 HAS AN ANTENNA WHICH HAS A PLASTIC THREADED BASE AND IF HAND-TIGHTENED TO THE EXTREME, WILL CRACK AND CAN DEPART THE AIRCRAFT IN-FLIGHT. THIS IS WHAT HAPPENED IN THIS INCIDENT.SDR CA990715013Brush Assy · damaged(CAN) WHILE PERFORMING 100 HOUR INSPECTION, IT WAS FOUND THAT 2 BRUSH ASSEMBLIES HAD SHEARED THE RIVETS ATTACHING THE SPRING BRACKETS. HOWEVER, THE SPRINGS HELD THE BRACKETS IN PLACE, BUT COULD HAVE VIBRATED OUT POSSIBLY CAUSING SEVERE DAMAGE IN-FLIGHT. BRUSSDR CA990707040Starter · misoverhauled(CAN) UNAPPROVED PARTS FOUND ON APC STARTER/GENERATOR.SDR CA990707036Pump · failed(CAN) FUEL PUMP DRIVE SHAFT SHIFTING IN HOUSING, COULD POSSIBLY DISENGAGE DRIVE GEAR. RESULT: FUEL PUMP SENT FOR TEARDOWN O-RING AND SIR CLIP FOUND DAMAGED.SDR CA990707032Governor · failed(CAN) POWER TURBINE GOVERNOR OVERSPEEDING IN A DESCENT TO 105 PERCENT N2 WITH NO RECOVERY BACK TO 100 PERCENT N2 (MAXIMUM 5 SECONDS ALLOWED TO RECOVER). AT TSO 42.4 HOURS, DEFECT NO OVERSPEED RECOVERY. AT TSO 46.4 HOURS, GOVERNOR TROUBLESHOOTING. AT TSO 64.SDR CA990728055Accumulator · cracked(CAN) AFTER ENGINE REPLACED, POWER CHECK WAS CARRIED OUT WHERE ENGINE WOULD PRODUCE ONLY 80 PERCENT TORQUE. INVESTIGATION REVEALED A CRACK IN THE 6 CUBIC INCH ACCUMULATOR IN THE PY LINE. THE CRACK WAS FOUND IN THE AREA WHERE THE END FITTING FOR THE PY LINE ISDR CA991007059Fcu · failed(CAN) FCU CUT FUEL OFF AT 24 DEGREES RATHER THAN 10 DEGREES.SDR CA991007053Control Cable · chafed(CAN) CASEY HEATER FIRE WALL SHUT-OFF FOUND NOT TO BE CONNECTED. CABLE WAS CHAFING ON THE ENGINE PAN LONGERON.SDR CA991007054Filter · misinstalled(CAN) FUEL FILTER BOWL FOUND LOCKWIRED INCORRECTLY. CORRECTED.SDR CA991007055Line · chafed(CAN) ENGINE OIL SYSTEM LINES FOUND TO BE CHAFING ON THE FUEL CONTROL SYSTEM LINES. LINES WERE THEN REPOSITIONED CORRECTLY.SDR CA991007056Nut · loose(CAN) COMPRESSOR SCROLL JAM NUT FOUND LOOSE. RECTIFIED.SDR CA991027056Seal · failed(CAN) FORWARD SEAL FAILED AT 60 HOURS AFTER INSTALLATION.SDR CA000110034Starter Gen · failed(CAN) DURING PRE-FLIGHT, THE PILOT FOUND PIECES OF BRUSHES & CLIPS IN ENGINE PAN. STARTER-GENERATOR WAS REPLACED AND SENT BACK.SDR CA991007052Fitting · cracked(CAN) RIGHT HORIZONTAL STABILIZER FITTING CRACKED. (P/N 206-020-121-010).SDR 99ZZZX2250Fcu · malfunctionedFCU HARD TO START, TOO MUCH FUEL. REMOVED AND SENT FOR REPAIR.SDR 99ZZZX2252Blade · bentBLADES BENT FOUND DURING INSPECTION. REMOVED AND REPLACED.SDR 99ZZZX2256Pump · malfunctionedFUEL PUMP ASSEMBLY FAILED BYPASS TEST. REMOVED AND REPLACED.SDR CA991007047Governor · stiff(CAN) TURBINE GOVERNOR ARM WAS VERY STIFF TO MOVE. ENGINES OVERSPEEDS AND DROOPS EXCESSIVELY. UNIT REPLACED.SDR CA991007048Indicator · failed(CAN) THE GYRO WILL NOT CAGE LEVEL. TOPPLES. GYRO REPLACED.SDR CA991007049Engine · failed(CAN) TURBINE REMOVED FOR EXESSIVE OIL CONSUMPTION.SDR CA991007046Swashplate · out of adjust(CAN) THE SWASHPLATE FRICTION WAS ADJUSTED AT THE 300 HOUR INSPECTION. WAS ADJUSTED TO THE HIGH SIDE. HOWEVER, WHEN THE OUTSIDE TEMPERATURE WENT UP, SO DID THE FRICTION. UNIT WAS RE-ADJUSTED.SDR CA990513006Armature · misrepaired(CAN) DURING OVERHAUL, LUCAS STARTER /GENERATOR WAS FOUND WITH AN APC ARMATURE INSTALLED P/N 150SG1064. THE APPROVED PART IS LUCAS P/N 23032-1920. CORRECT ARMATURE WAS SUBSEQUENTLY INSTALLED AND O/H COMPLETED.SDR CA991007044Line · leaking(CAN) TORQUEMETER LINE FOUND LOOSE AND LEAKING ON THE AIRCRAFT.SDR 99ZZZX2392Shield · crackedCRACKS DETECTED DURING FLUORESCENT PENETRANT INSPECTION. REF: PACIFIC SKY SUPPLY, P. O. NR 26388.SDR CA990927033Harness · misinstalled(CAN) BAD WIRING CONNECTION TO THE ROTOR TACHOMETER/GENERATOR. REPLACED.SDR CA991007037Fcu · leaking(CAN) FUEL LEAKING FROM OVERBOARD DRAIN.SDR CA990323002Skin · debonded(CAN) DURING ROUTINE INSPECTION, SOME DEBONDING WAS NOTICED ON UNDERSIDE OF FUSELAGE BELLY. FURTHER INSPECTION REVEALED THAT DEBONDING WAS SLIGHTLY BEYOND REPAIRABLE LIMITS.SDR CA990323003Support · cracked(CAN) DURING SCHEDULED INSPECTION, 2 CRACKS WERE FOUND AT CROSSTUBE SUPPORT AREA. CROSSTUBE SUPPORT WILL BE REPLACED WITH NEW BELL PART NUMBER WHICH IS MANUFACTURED WITH THICKER MATERIAL AND MANUFACTURED THROUGH A DIFFERENT PROCESS.
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