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 CA041112005Sprag Clutch · broken(CAN) CLUTCH REMOVED FOR GREASE BEARING REPLACEMENT. UPON INSPECTION 2 SPRAGS FOUND BROKEN.SDR CA041224006Bearing · misaligned(CAN) SUBJECT TAIL ROTOR BLADE ASSY WAS REMOVED FROM A/C DUE TO EXCESSIVE T/R VIBRATIONS AT 1.1 IPS. OPERATOR'S OVERHAUL SHOP PERFORMED AN INSPECTION AND AN ALIGNMENT OF SPHERICAL BEARINGS CHECK. IT HAS BEEN DETERMINED THAT THE BEARINGS ALIGNMENT WAS OVER LISDR 2005FA0000434Engine · making metalPILOT HAD ENGINE CHIP LIGHT ILLUMINATION FOLLOWED ALMOST IMMEDIATELY WITH A NOISE/VIBRATION, THEN A POWER LOSS/ DECEL. AC LANDED WITHOUT INCIDENT AND PILOT HAD TO SHUT OFF THE ENGINE. CHIP PLUGS AND OIL FILTERS WERE CONTAMINATED WITH METAL. DISASSEMBLY OF ESDR ALG2004F00067Latch · crackedDURING FLIGHT, LT REAR PASSENGER DOOR POPPED OPEN IN FLIGHT AC LANDED ON SS154 THE DOOR WAS SHUT AND SECURED. AFTER TAKE OFF THE DOOR POPPED OPEN AGAIN AIRCRAFT LANDED. THE MECHANIC FOUND A 3 INCH CRACK ABOVE THE LOWER LATCH. THE DOOR WAS REMOVED AND REPLACSDR CA041102012Engine · making metal(CAN) AFTER CLOSE INSP. OF THE BOTTOM CHIP PLUG, IT WAS FOUND TO HAVE A LARGE AMOUNT OF FERROUS METAL ON IT. THE ENGINE WAS REMOVED FROM SERVICE AND SENT TO A REPAIR FACILITY FOR FURTHER INVESTIGATION.SDR CA041026011Transmission · corroded(CAN) SEVERE CORROSION FOUND IN OIL GALLERY BEHIND M/R XMSN UPPER BEARING LINER FOR 369D25149 AND 369D25148 BEARINGS. PROBLEM INITIALLY INDICATED BY LACK OF FLOW FROM OIL ORFICES. CORROSION FOUND BY REWORK FACILITY DURING LINER REMOVAL, AND WAS UNDETECTABLE SDR IIFR004FAngle · crackedLT LOWER CAP ANGLE PN 206-031-200-037 CRACKED 5.250 IN. MEASURED FROM THE FORWARD TIP OF THE CAP ANGLE ON THE HORIZONTAL SECTION AND OF THE CAP ANGLE ON THE HORIZONTAL SECTION AND 5.625 IN. FROM THE FORWARD TIP OF THE CAP ANGLE ON THE VERTICAL SECTION GOING SDR CA041019001Bolt · loose(CAN) THE AIRCRAFT WAS OPERATING AWAY FROM BASE WITHOUT A MAINTENANCE CREW ABOARD. THE FOLLOWING OCCURRENCE WAS REPORTED UPON RETURN TO BASE.AFTER THE LAST FLIGHT OF THE DAY THE PILOT NOTICED A TRANSMISSION OIL LEAK ON THE RIGHT SIDE DRAIN AT THE CROSS TUBE. ISDR KBM2004F00237Stud · brokenBROKEN ALUMEC CONNECTION STUD. REMOVED AND REPLACED.SDR CA041130005Coupling · sheared(CAN) AFTER FRETTING WEAR OVER PILOT OUTSIDE DIA, THE ADAPTER COUPLING SHEARED IN T (TWO) PARTS. REFERENCES: CEB A-1392 FROM CEB 250-C20 SERIES.SDR CA041013006Blade · cracked(CAN) HELICOPTER WAS FLYING WITH EXTERNAL LOAD WHEN THE PILOT FELT A (BUMP) IN THE CONTROLS. THE WEATHER WAS DETERIOATING WHERE HE WAS OPERATING SO HE RETURNED TO THE STAGING AREA. THE PILOT INSPECTED THE BLADES AFTER SHUTDOWN AND FOUND A 4.5 INCH CRACK 19 INCSDR 2004F00397Crosstube · brokenBOTH SKID TUBES FAILED AT FWD EDGE OF SKID SHOE JUST AFT OF AFT CROSS TUBE. THIS HAPPENED IN HANGAR WHEN PERSONNEL PULLED DOWN ON THE T/R GEARBOX. FAILURE WAS DUE TO CORROSION/STRESS CRACK, AND INPROPER POSITIONING, AT DESIGN, OF THE SKID SHOE. SKID SHOE SHOULSDR KBM2004F00232Drag Pin · crackedSPIKE MOUNT CRACKED JUST FORWARD OF DOG LEG RADIUS. CAUSE UNKNOWN, SENT FOR EVALUATION. INSTALLED SERVICEABLE SPIKE MOUNT.SDR ERAA097497Cover · misoverhauledSUMP COVER AIR HOLE IS BLOCKED. RETURNING ON ERA REPAIR ORDER NR RW-900461 REQUESTING WARRANTY REPAIR.SDR ALG2004F00062Power Supply · burnedIN FLIGHT, NOTED A ODOR OF ELECTRICAL WIRE BURNING AND (CLICK) FROM OVERHEAD CONSOLE, SAW ANTI-COLLISION LIGHT OFF. TURNED SWITCH BACK ON, SMELLED ODOR AGAIN AND SWITCH TURNED OFF BY ITSELF. FOUND ELECTRICAL ODOR COMING FROM STROBE LIGHT POWER SUPPLY, REPLACSDR NM09EDR001Mast · corrodedDURING 100 HR INSPECTION, THE MAIN ROTOR DRIVESHAFT WAS REMOVED FOR INSPECTION. THE MECHANIC LOOKED DOWN THE MAST AND FOUND THE PAINT ON THE INSIDE DIAMETER WAS BLISTERED AND PEELING. THE MECHANIC ALSO NOTICED PAINT ON THE TOP OF THE MAIN TRANSMISSION SPLINES.SDR CA041109007Check Valve · unserviceable(CAN) UPON TROUBLESHOOTING FOR STARTING SNAG, FOUND THAT FUEL WASN'T BEING DELIVERED TO THE FUEL NOZZLE. REPLACED CHECK VALVE. THE REMOVED VALVE WAS FOUND TO HAVE A CRACKING PRESSURE OF APPROXIMATELY 15 PSI.SDR KBM2004F00222Fcu · inaccurateFUEL SENDER NOT TRANSMITTING CORRECT QUANTITY. INSTALLED NEW UNIT.SDR ALG2004F00063Drain · openAFTER TAKE OFF, WAS NOTIFIED BY RADIO OF LEAKING FUEL IN FLIGHT, LANDED, EVACUATED PASSENGERS AND PERFORMED EMERGENCY SHUTDOWN, NOTIFIED MAINTENANCE. MAINTENANCE FOUND EXTERNAL FUEL FILTER DRAIN OPEN, CLOSED DRAIN, COMPLIED WITH GROUND RUN LEAK CHECK, NO DEFESDR CA040825013Shaft · broken(CAN) PILOT REPORTED THAT WHEN DESCENDING RAPIDLY, COLLECTIVE BOTTOMED OUT AND RT PEDAL INPUT, THE PEDALS WOULD VIBRATE AND THE AIRFRAME WOULD VIBRATE AND WITH A LITTLE COLLECTIVE INPUT AND LT PEDAL THE VIBRATION WOULD GO AWAY. THE SAME COULD BE INDUCED ON THESDR CA041223005Pitch Link · cracked(CAN) DURING A SCHEDULED 100-HOUR INSPECTION TWO (2) VERTICAL CRACKS WERE FOUND ON A MAIN ROTOR PITCH LINK. THE CRACKS (APPROX. .180)SDR ALG2004F00048Relay · overheatedIN FLIGHT CREW AND PASSENGERS SMELLED SMOKE, LANDED AT FIRST AVAILABLE PLATFORM (WC 620) AND AFTER LANDING AIRCRAFT EXPERIENCED TOTAL ELECTRICAL FAILURE. REMOVED AND REPLACED AIRCRAFT BATTERY AND BATTERY RELAY, SET GENERATOR VOLTAGE AND INSPECTED WIRES IN AIRSDR ERAA098178Governor · malfunctionedGOVERNOR DROPS OUT OF SERVICE LIMITS. COMPONENTS WORN INTERNALLY. REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15-1095A.SDR CA040830003Compressor · stalled(CAN) AIRCRAFT WAS EQUIPPED WITH A MIST ELIMINATOR THAT WAS REMOVED IN THE SPRING OF 2003. WHAT REMAINED WAS THE WEATHER STRIPPING THAT SEALED THE MIST ELIMINATOR TO THE BACK OF THE PARTICLE SEPARATOR. THE WEATHER STRIPPING HAS A SELF ADHESIVE AND WAS ATTACHESDR KBM2004F00196Resistor · intermittentFUEL QUANTITY READING INTERMITTENTLY 35-40 GALLON. REPLACED R1 AND R2 RESISTOR WITH A NEW UNIT AND OPS CHECKED GOOD.SDR 2004FA0000830Adapter · shearedDURING FLIGHT PILOT HEARD MUFFLED BANG AND EXPERIENCED YAWING OF FUSELAGE WITH RELATED HIGH TOT INDICATION OF NR 2 ENG. ENGINE SHUT DOWN AND EMERGENCY LANDING CARRIED OUT. AC RECOVERED BY ROAD TO MAINT FACILITY. INVESTIGATION REVEALED MINOR DEBRIS ON ACCESSSDR ERAA098179Governor · split10 PERCENT TORQUE SPLIT WHEN ADJUSTED ALL THE WAY UP, LADDER GOVERNOR DROPS OUT OF SERVICE LIMITS. OVERHAULED IAW HONEYWELL OHM FORM 15 1095A.SDR CA040819002Restraint · delaminated(CAN) DURING DAILY INSPECTION IT WAS NOTED THE FLAP RESTRAINT HAD BECOME DELAMINATED AT BEARING HOUSING.SDR ERAA097537Compressor · failedCOMPRESSOR BLADE AND VANE FAILED 2-3 STAGE COMP BLADES CAME OFF, HEAVY DAMAGE ON 1, 2, AND 3 STAGE VANES. CHANGED MODULE ON ENGINE ASSY.SDR ERAA097078Carbon Seal · leakingNEW CARBON SEAL ISSUED TO AIRCRAFT BUT COULD NOT BE USED DUE TO LEAKING, UNEVEN SURFACE ON CARBON FACE. RETURNING TO AVIALL ON ERA PACK SLIP NR 5955 REQUESTING CREDIT.SDR EOO2004FAAFuel Control · inoperativePILOT COMPLAINED IDLE WAS AT 55 PERCENT, AND IT WAS. WHEN ADJUSTMENT WAS ATTEMPTED IT WAS DISCOVERED THAT THERE WAS NO DRAG TORQUE ON THE IDLE SCREW. THE SCREW WAS ADJUSTED UNTIL DRAG WAS ENCOUNTERED (THIS HAD TO BE DONE WHILE THE ENGINE WAS NOT RUNNING). SSDR HXSD2004802Gearbox · making metalPILOT REPORTED A CHIP LIGHT FOR THE TAIL ROTOR GEAR BOX. MECHANIC INVESTIGATED AND FOUND FOUR HAIR LINE SLIVERS ON THE CHIP PLUG ALL WHICH EXCEEDED LIMITS AS DESCRIBED BY THE MM. REMOVED THE GEAR BOX (PN 369D25400 SN 0295) AND INSTALLED SERVICEABLE GEAR BOX SDR HXS2004F00003Engine · making metalPILOT REPORTED ENGINE CHIP LIGHT. MECHANIC FOUND ENGINE MAGNETIC CHIP DETECTOR HAD METAL PARTICLES WHICH EXCEDED ALLOWABLE LIMIT IN SIZE. MECHANIC REMOVED ENGINE AND INSTALLED LIKE PN ENGINE, SN CAE834274. (AL05200402908)SDR CA050616008Seal · worn(CAN) FORWARD PTO SEAL REMOVED DUE TO OIL TRANSFER FROM ENGINE TO TRANSMISSION. UPON SEAL REMOVAL IT WAS FOUND THE IB SEAL LIP HAD BEEN FOLDED UNDER THE SEAL AT 2 LOCATIONS, APPROXIMATELY 1 INCH EACH. THE TENSION SPRING FROM THE SEAL HAD STAYED ON THE SEAL, ASDR ERAA097089Engine · making metalENGINE MAKING METAL. REPAIRED ENGINE, CHANGED BEARING AND INNER RACE.SDR ERAA097508Engine · making metalENGINE MAKING METAL. INSTALLED SERVICEABLE GEARBOX AND COMPRESSOR, C/W CEB-A-1392, C/W E CHECK INSPECTION.SDR EOO2004F00002Adapter · wornDURING TURBINE REMOVAL IT WAS DISCOVERED THAT THE EPOXY WAS MISSING FROM THE GOVERNOR DRIVE ADAPTOR AND THAT THERE IS EXCESSIVE SPLINE WEAR BETWEEN THE ADAPTOR AND THE GOVERNOR DRIVE SHAFT. THE EPOXY PIECE WAS RECOVERED FROM THE ENGINE GEARBOX GOVERNOR DRIVE SDR CA040726005Connector · debonded(CAN) THE FLIGHT CREW WAS UNABLE TO START NR 1 ENGINE. NR 1 IGNITION EXCITER UNIT WAS DETERMINED TO HAVE FAILED. UPON INVESTIGATION IT WAS FOUND THAT THE CONNECTOR PLUG ATTACHMENT ON THE EXCITER BOX HAD DEBONDED CAUSING THE FAILURE. THE UNIT WAS REPLACED.SDR ERAA096641Shim · missingGOVERNOR HAS ONLY 178.4 HOURS SINCE OVERHAUL AT ACRO. SHIMS ARE MISSING ON DRIVESHAFT. RETURNING ON ERA REPAIR ORDER RW-899866 REQUESTING WARRANTY REPAIR.SDR ERAA097093Engine · fodENGINE HAS HARD CLUTCH ENGAGEMENT. GEARBOX PILOT BORE DELAMINATED, COMPRESSOR FOD. INSPECTED ENGINE ASSY IAW RR OMM CH 72-00-00 PARA I.D. (4). INSTALLED SERVICEABLE COMPRESSOR AND GEARBOX.SDR ERAA097507Compressor · crackedCRACKED AND FOD ON IMPELLER VANES. OVERHAULED COMPRESSOR, COMPLIED WITH CEB A-1392 ADAPTER COUPLING.SDR ERAA097504Governor · weakWEAK AT HOVER, NR ROTOR 100 PERCENT. TORQUE NR 1 ENGINE 80 PERCENT. NR 2 ENGINE 50 PERCENT WHEN TORQUE IS MATCHED NR DROPS TO 98 PERCENT.SDR HDNR200400001Shield · separatedTHE NR 1 NOZZLE SHIELD DOME SEPARATED CAUSING THE TURBINE NR 8 BEARING SCAVENGE STRUT TO CLOG WITH CARBON INDUCED BY THE EXCESS HEAT ALLOWED IN THE AREA BY THE MISSING DOME. WHEN THE SCAVENGE FLOW WAS COMPLETELY LOST, THE OIL WAS FORCED THROUGH THE NR 8 LABYRSDR CA040708001Bushing · debondedA SERVICEABILITY INSPECTION WAS CARRIED OUT FOLLOWING THE LAST FLIGHT OF THE DAY AND IT WAS FOUND THAT THE LEFT ENGINE OUTBOARD MOUNT HAD VISIBLY DROPPED. THE ELASTOMER MATERIAL WAS COMPLETELY DEBONDED FROM THE METAL INNER PORTION OF THE MOUNT BUSHING P/N 105SDR KBM2004F00213Radio · intermittentPOWER KNOB BROKEN AND RADIO OPERATES INTERMITTENTLY. REMOVED AND REPLACED VHF COMM RADIO.SDR CA040705005Engine · failedON STARTING NR 2 ENG THE WIND UP TO FUEL INTRODUCTION WAS NORMAL ENGINE LIGHT-OFF AND INITIAL SURGE WAS NORMAL, THEN THE N1 ACTUALLY DROOPED, THE ENG FLAMED OUT MOMENTARILY, CAUGHT AGAIN (WITH A LARGE PUFF OF SMOKE) ACCELERATED A LITTLE, THEN DROOPED AGAIN ANDSDR ALG2004F00045Indicator · inoperativeTAKING OFF FOR FIRST FLIGHT OF THE DAY, AIRCRAFT HAD NO AIRSPEED ON INDICATOR. MAINTENANCE FOUND PLUG MISSING ON CAP ASSEMBLY FOR THE PITOT DRAIN SYSTEM. INSTALLED NEW PLUG IN CAP ALL WORK DONE IAW MM, COMPLIED WITH PITOT SYSTEM CHECK NO DEFECTS NOTED.SDR KBM2004F00135Motor · failedREMOVED BLOWER MOTOR, AIR CONDITIONER BLOWS WARM, FOUND FAN AND BEARINGS DEFECTIVE. INSTALLED SERVICEABLE MOTOR ASSY. OPS CHECKED GOOD.SDR CA040604015Pin · dislodged(CAN) PIN P/N 100-035-187.5-30.5 WAS INSTALLED CORRECTLY. HOWEVER AN ADDITIONAL PIN WAS FOUND FLOATING INSIDE THE SHAFT. THE LAST MAINTENANCE PERFORMED IN THAT AREA WAS 27 JUNE 2003. APPROX 666.1 HOURS. PIN WAS REMOVED AND THE REST OF THE ASSEMBLY WAS INSPESDR KBM2004F00211Motor · inoperative7 IN BLOWER MOTOR, NOT BLOWING COLD AIR. REMOVED AND REPLACED.
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