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 AU990487Fitting · misrepairted(AUS) CENTER BOX SECTION STIFFENER AND FITTING INCORRECTLY REPAIRED. REPAIR DID NOT COMPLY WITH THE REPAIR SCHEME STATED IN BELL 206 STRUCTURAL REPAIR MANUAL. UNAPPROVED REPAIR.SDR CA990927029Governor · failed(CAN) THE TURBINE GOVERNOR WAS REMOVED FOR N2 OVERSPEED (N2 GREATER THAN 114 PERCENT). THE UNIT WAS SENT TO A REPAIR FACILITY FOR TESTING.SDR CA990927030Fcu · failed(CAN) FCU SUSPECTED CAUSE FOR N2 OVERSPEED CONDITION.SDR CA990927031Engine · overspeed(CAN) REPORTED OVERSPEED = 114 PERCENT.SDR AU990332Line · broken(AUS) PC PIPE FROM COMPRESSOR SCROLL TO `TEE' FITTING FRACTURED AND BROKEN OFF AT THE BASE OF THE FLARE BELOW THE `B' NUT. THE ENGINE IS FITTED WITH A CECO FUEL SYSTEM.SDR HEEA061770Governor · malfunctionedAT CRUISE FLIGHT, 80 PERCENT TORQUE, TORQUE OSCILLATES 20 PERCENT, WITH A CORRESPONDING TOT OSCILLATION. REPLACED WITH SERVICEABLE GOVERNOR.SDR HEEA061771Fcu · leakingFUEL CONTROL LEAKING OUT START DERICH SHAFT AND BYPASS COVER. PERFORMED PRELIMINARY INSPECTION. TEST START DERICH FUNCTION AND FOUND NO LEAKAGE FROM THE SHAFT. BENCH TEST AND FOUND NO LEAKAGE FROM BYPASS COVER OR START DERICH WHEN TESTED ON THE FLOW BENCH. SDR HEEA061773Pump · wornPERFORMED SPLINE INSPECTION AND FOUND WORN DRIVE SPLINES FUEL PUMP.SDR 99ZZZX2843Servomotor · malfunctionedSERVOMOTOR DOES NOT OSCILLATE WHEN SWITCH IS IN ON POSITION. REF: MCN NR 24.SDR HEEA061683Fcu · failedFUEL CONTROL CHANGED TO COMPLY WITH CEB-A-73-3102. AIRCRAFT FLEW 6.5 HOURS AND THE AIRCRAFT EXPERIENCED A HANG START. THE AIRCRAFT WAS TROUBLESHOT AND THE FUEL CONTROL WAS CHANGED. COMPLIED WITH CEB-A-73-3102, NEW SPRING INSTALLED. UPGRADED UNIT.SDR 20000712SH031Filter · contaminatedUNIT WAS IN FOR FUNCTIONAL TEST ONLY. DISASSEMBLED UNIT FOR POSSIBLE FILTER CONTAMINATION AND FOUND 50 PERCENT OF FILTER COVERED WITH BLACK PARTICLES AND CHIPS OF METAL. (X)SDR 20000713SH003Sprag Clutch · brokenNO INDICATION OF SPRAG FAILURE, NORMAL ENGINE AND ROTOR COAST DOWN ON SHUT DOWN. BROKEN SPRAG FOUND WHEN CLUTCH WAS DISASSEMBLED FOR 300-HOUR INSPECTION. (X)SDR HEEA061567Filter · malfunctionedFILTER FAILS BYPASS CHECK.SDR HEEA061590Filter Assembly · leaksFILTER ASSEMBLY LEAKS WITH NEW SEALS INSTALLED.SDR HEEA061591Filter Assembly · malfunctionedFILTER ASSEMBLY WILL NOT BYPASS.SDR HEEA061592Filter Assembly · malfunctionedFILTER ASSEMBLY WILL NOT BYPASS.SDR CA990412001Switch · failed(CAN) ELT G-SWITCH FOUND TO BE U/S DURING ANNUAL RECERTIFICATION. ELT UNIT RETURNED TO MANUFACTURER FOR REPAIR.SDR CA991007043Swashplate · vibration(CAN) WHEN MAINTENANCE RUNNING WITH BLADES OFF, A SEVERE STICK SHAKE (1.2 IPS) WAS NOTED. SWASHPLATE REPLACED AND SHAKE REDUCED TO 0.2 IPS.SDR ERAA061855Collector · mismanufacturedFOURTH TIP PATH AREA OUT OF ROUND ON EXHAUST COLLECTOR. UNDERSIZED.SDR 99ZZZX1537Bleed Valve · corrodedBLEED VALVE CORRODED AND SHAFT BUSHING WORN. REMOVED AND REPLACED.SDR 99ZZZX1538Case Halves · crackedCASE LINING CRACKED AND CORRODED UNDER LINING. REMOVED AND REPLACED.SDR 99ZZZX1549Governor · malfunctionedGOVERNOR SURGES ABOVE 70 PSI TORQUE. ERRATIC BEEP RANGE. REMOVED AND REPLACED.SDR CA990330018Dampener · wrong part(CAN) SEVERAL UNAPPROVED PARTS WERE FOUND DURING DISASSEMBLY AT OVERHAUL OF STARTER/GENERATOR. A LUCAS BACKPLATE AND FRICTION RING WERE FOUND IN PLACE OF THE APC PARTS, BUT THERE WAS NO EVIDENCE OF FAILURE. CORRECT PARTS WERE PROCURED AND INSTALLED. IN ADDISDR CA020405004Case · worn(CAN) LOSS OF POWER REPORTED DUE TO WORN VANES AND LIFTED PLASTIC.SDR CA991007039Nozzle · cracked(CAN) FUEL NOZZEL OUTER AIR SHROUD CRACKED WHEN RECEIVED FROM VENDOR.SDR ERAA061849Scroll · corrodedSCROLL ASSEMBLY WAS SENT AS EXCHANGE UNIT ON AERO PROPULSION JOB NR 6514. ASSEMBLY HAS EXCESSIVE CORROSION.SDR CA990401004Folding Pin · broken(CAN) IT WAS NOTICED ON POST-FLIGHT INSPECTION THAT THE BOTTOM PART OF THE AFT GREEN M/R BLADE FOLDING PIN WAS HANGING DOWN LOWER THAN THE LEAD-LAG LINK. ALL PARTS OF THE PIN WERE STILL IN PLACE AND THE LEVER ARM WAS STILL HOLDING THE SELF-LOCKING NUT. NO VSDR CA991007034Collective · failed(CAN) PLAY FOUND ON THE COLLECTIVE STICK IN THE THROTTLE MECHANISM WHICH CAUSED THE IDLE POSITION TO BE INCONSISTENT. UNIT WAS REPAIRED AND REINSTALLED.SDR CA990323004Strap Pack · cracked(CAN) STRAP PACK CRACKED IN AREA ADJACENT TO LEAD/LAG LINK ATTACHMENT. NO CRACKS ARE ALLOWED IN THIS AREA.SDR AU990346Pillow Block · cracked(AUS) MAIN ROTOR HEAD PILLOW BLOCKS CRACKED. BLOCKS WERE A NEW FIT ITEM AT HEAD OVERHAUL AND WERE CRACK TESTED PRIOR TO FITMENT.SDR CA991007033Governor · failed(CAN) BLUE GREASE VISIBLE ON OUTER TURBINE GOVERNOR HOUSING. GOVERNOR WAS SLUGGISH EVEN WITH THE UNIT RIGGED ALL TO THE MAXIMUM. GOVERNOR REPLACED.SDR 99ZZZX1353Governor · malfunctionedSURGING. REMOVED AND REPLACED. SENT FOR EVALUATION/REPAIR.SDR CA990223020Bearing · failed(CAN) DURING FLIGHT NR 2, ENGINE HAD A CHIP DETECTOR LIGHT. RESET WAS CARRIED OUT, BUT THE LIGHT CAME BACK ON. THE AIRCRAFT RETURNED TO BASE. ALL ENGINE PARAMETERS WERE NORMAL. POST-FLIGHT BOTH THE UPPER AN LOWER CHIP DETECTORS WERE REMOVED AND METAL CONTSDR CA990303002Engine · failed(CAN) THE PILOT WAS IN SLOW CRUISE WHEN THE ENGINE OUT LIGHT ACTIVATED. THE ENGINE HAD DECELLERATED TO FLIGHT IDLE. SINCE THE HELICOPTER WAS ONLY 300 FEET ABOVE GROUND, IT SUSTAINED BELLY DAMAGE ON THE ENSUING HARD LANDING.SDR CA990927028Bleed Valve · malfunctioned(CAN) BLEED VALVE NOT FUNCTIONING PROPERLY.SDR CA991027062Hose · leaking(CAN) FORWARD FUEL TANK VENT HOSE LEAKED SLIGHTLY WHEN FULL. THE MANUFACTURER DATE ON THE HOSE WAS 7-76.SDR ERAA060600Wheel · pittedNR 2 WHEEL INSTALLED AND REMOVED FROM AIRCRAFT 9-14-99 DUE TO PITTS AND FLAKING ON BLADES.SDR CA991007027Indicator · misinstalled(CAN) FUEL SHUT-OFF CABLE WAS HARD TO ACTUATE BECAUSE THE N1 AND TOT GAUGES WERE NOT INSTALLED CORRECTLY. GAUGES SUBSEQUENTLY INSTALLED CORRECTLY.SDR ERAA060596Nozzle Shield · crackedNR 1 NOZZLE SHIELD WITH ONLY 1673.6 HOURS SINCE NEW HAS A CRACKED DOME.SDR CA990125005Link · cracked(CAN) LEAD/LAG LINK INSPECTION PER AD 95-03-13, LINKS FOUND CRACKED. REPLACED.SDR CA990115002Compressor · malfunctioned(CAN) PILOT REPORTED THERE WAS NO NOTICEABLE RISE IN TEMPERATURE ON NR 1 ENGINE DURING ANTI-ICE SYSTEM ACTIVATION. INVESTIGATION FOUND LINE (P/N 6876333) HAD FAILED. THIS IS THE SECOND FAILURE OF THAT LINE IN 55 HOURS OF OPERATION. THE FAULT WAS FOUND TO BESDR CA990125018Gearbox · corroded(CAN) FOUND THREE AREAS OF DEEP CORROSION IN THE MAGNESIUM CASE NEAR THE UPPER GEARBOX MOUNTS.SDR 99ZZZX258Blade · damagedFIRST STAGE BLADES NEED DRESSED OUT. DRESSED BLADES, RETURNED TO SERVICE.SDR CA990125019Blade · cracked(CAN) THREE CRACKS IN THE SURFACE OF THE BLADE THRUST FACE. EACH APPROXIMATELY 1.5 INCHES TO 2 INCHES LONG. CRACK LOCATED ABOUT 2/3 OF THE DISTANCE OUT FROM THE BLADE ROOT.SDR ERAA059960Nut · mismanufacturedNEW TIEBOLT NUT WOULD NOT STRETCH BEFORE REACHING MAX TORQUE.SDR 99ZZZX215Igniter · malfunctionedIGNITER SLOW TO FIRE ON COLD MORNINGS. REMOVED AND REPLACED.SDR 98ZZZX4758Fuel Nozzle · failedDURING EXTERNAL LOAD OPS, ENGINE RPM WENT TO APPROXIMATELY 60 PERCENT N2. LOAD WAS DROPPED AND RPM CAME BACK TO 95 PERCENT. AIRCRAFT WAS FLOWN APPROXIMATELY 1/4 MILES TO LZ, BUT WOULD NOT HOLD RPM TO HOVER. FOUND FILTER IN FUEL NOZZLE COLLAPSED.SDR CA981125094Shaft · failed(CAN) FORWARD SHORT DRIVE SHAFT HAD PLAY IN THE COUPLING AT THE RIVETED END.SDR CA981123022Cable · damaged(CAN) THREE STRANDS OF SLING CABLE BROKEN BELOW UPPER ATTACHMENT SWAGING.SDR CA981125026Tube · broken(CAN) DURING FLIGHT, THE PILOT SELECTED NR 1 ENGINE ANTI-ICE AND THERE WAS NO TEMPERATURE RISE ON THE NR 1 ITT TEMPERATURE INDICATOR. ON RETURN TO BASE, INSPECTION FOUND THE ANTI-ICE TUBE WAS BROKEN JUST AFT OF THE FLARE. THE ANTI-ICE TUBE WAS REPLACED AND T
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