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 AC2A081230Washer · separatedPOTTING COMPOUND FAILED, WASHERS AND CLIP CAME OFF THE END OF SPLINE DRIVE. GOVERNOR REPLACEDSDR CA021129011Connector · leaking(CAN) AME INSTALLED TURBINE ASSEMBLY FOLLOWING OVERHAUL. ON GROUND RUN SEVERE OIL LEAK WAS OBSERVED FROM 6 & 7 PRESSURE OIL CONNECTOR ('TEE FITTING) AREA. INSPECTION REVEALED THAT TWO RETAINING BOLTS HAD LESS THAN 10 IN/LBS. BREAK TORQUE. AME REPLACED CRUSSDR ERAA081159Fuel Control · malfunctionedFUEL CONTROL CAUSES HOT STARTS AND SLOW ACCELERATION. REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15 602E CEB 1382 EMBODIED.SDR ERAA081160Fuel Control · malfunctionedFUEL CONTROL CAUSES ROTOR DROOP, UNIT OVERHAULED IAW HONEYWELL OHM FOR 15 602E.SDR ERAA081161Fuel Control · malfunctionedNR 2 ENGINE HANGS AT 50 PERCENT N1 FOR 3-5 SECONDS THEN RAPIDLY ACCELS TO 537 DEGREES N1. REPLACEMENT FIXED PROBLEM. FUEL CONTROL OVERHAULED, CLOSE TO TX REQUIRES MODS, CEB'S. OVERHAULED IAW HONEYWELL OHM FOR 15-602E.SDR CA020923006Saddle · cracked(CAN) SADDLE FOUND CRACKED DURING 100 HR INSPECTION. NOTE : TRAINING THE DAY BEFORE SADDEL FOUND CRACKED.SDR AUS20021367Seal · seized(AUS) ENGINE COMPRESSOR SEIZED. INVESTIGATION FOUND THE REAR LABYRINTHSEAL HAD PICKED UP IN THE SEAL HOUSING.SDR CA031117011Gearbox · contaminated(CAN) ENGINE CHIP LIGHT ILLUMINATED DURING START. THE ENGINE WAS REMOVED AND SENT OUT FOR REPAIR. THE SUSPECTED CAUSE OF THE METAL CONTAMINATION WAS THE SPUR ADAPTER GEARSHAFT WHICH WAS A PMA PART OR THE 2.5 BEARING.SDR CA020910008Blade · cracked(CAN) DURING 100 HOUR INSPECTION, ENGINEER FOUND BLADE CRACKED JUST OUT BOARD OF THE ROOT FITTING. BLADE WAS REMOVED AND REPLACED WITH NEW UNIT.SDR CA020913007Clip · debonded(CAN) THE EXPOXY HOLDING THE SAFETY CLIP IN PLACE BECAME UNBONDED ALLOWING THE CLIP TO MOVE AND ALLOWING THE DRIVE GEAR TO DISCONNECT FROM THE SHAFT.SDR CA020912008Fuel Filter · failed(CAN) DURING START N1 SURGED THEN OPERATED NORMALLY. AIRFRAME FUEL FILTER, ENGINE DRIVE FUEL FILTER, HIGH PRESSURE FUEL FILTER, INLET SCREEN CHANGED OR CLEANED. SOME DEBRIS FOUND IN AIRFRAME AND ENGINE DRIVEN FUEL PUMP.SDR CA021025001Window · separated(CAN) DURING CRUISE FLIGHT PILOT HEARD A POPPING SOUND WHICH HE THOUGHT WAS THE RT FORWARD DOOR OPENING. HE GLANCED OVER AND SAW FRAGMENTS OF PLASTIC ON THE SEAT BESIDE HIM. THE COMPLETE WINDOW HAD DEPARTED AND LEFT JUST THE VERY EDGE OF THE MATERIAL WHICH IS SDR CA021002008Seal · leaking(CAN) ENGINE OIL WAS DETECTED COMING THROUGH THE UPPER AFT RT INTERIOR PANEL AND GRAVITY LEAKAGE DOWN TO THE AIRCRAFT FLOOR. CONDITION ONLY EXISTED UNDER STEEP RT TURNS OF THE HELICOPTER. A/C RETURNED TO BASE AND UPON INVESTIGATION OF THIS SITUATION IT WAS DETSDR CA021002010Gearbox · damaged(CAN) DURING A SCHEDULED 600 HOUR INSPECTION. DAMAGE WAS FOUND ON THE UNDER SIDE OF TAIL ROTOR GEARBOX CASE DUE TO A MIS-ALIGNMENT OF THE T/R PUSH PULL TUBE ADAPTER. DAMAGE WAS APPROXIMATELY .020 DEEP AND UPON INVESTIGATION IT WAS DETERMINED THAT PIN HAD EXCSDR CA021029002Seal · leaking(CAN) ENGINE OIL WAS DETECTED COMING THROUGH THE UPPER AFT RT SIDE INTERIOR PANEL AND GRAVITY LEAKAGE DOWN TO THE AIRCRAFT FLOOR. THIS CONDITION ONLY EXSISTED UNDER STEEP RT TURNS OF THE HELICOPTER. AIRCRAFT RETURNED TO BASE AND UPON INVESTIGATION, IT WAS DETESDR CA021029003Case · damaged(CAN) DURING A 600 HOUR INSPECTION OF AIRCRAFT, DAMAGE WAS FOUND ON THE UNDER SIDE OF THE T/R GEARBOX CASE. DUE TO A MIS-ALIGNMENT OF THE T/R PUSH PULL TUBE ADAPTER. DAMAGE WAS APPROX .020 DEEP & UPON INVESTIGATION IT WAS DETERMINED THAT PIN HAD EXCESSIVE WEARSDR CNM009ADM902Turbine Wheel · crackedNR 1 LOCKUP WAS FOUND, HEAVY RUB OF THE 29-34 AIR SEAL OF THE 2ND STAGE TURBINE NOZZLE AND SEAL KNIVES OF THE 1ST STAGE TURBINE WHEEL. 1ST STAGE TURBINE WHEEL FOUND CRACKED IF NOT FOUND WOULD HAVE BEEN CATASTROPHIC, TURBINE WHEEL WOULD OF EXITED THE ENGINE.SDR EOO2002F0000ACombust Chamber · crackedAIRCRAFT SUDDENLY STARTED TO RUN HOT, SUBSEQUENT POWER CHECK SHOWED ENGINE RUNNING 75 DEGREE C, HOTTER THAN PREVIOUS POWER CHECK TWO DAYS BEFORE. AIRCRAFT LANDED AND ON INSPECTION IT WAS FOUND THAT THE OUTER COMBUSTION CAN WAS CRACKED IN THE ARMPIT AREA.SDR CA020829009Case · cracked(CAN) ENGINE ASSEMBLY HAD HIGH TOT. UPON INSPECTION ENGINEER DISCOVERED CRACK IN ARMPIT AREA.SDR CA020813009Track · debonded(CAN) LT AFT SLIDING WINDOW TRACK BONDING FAILURE TO WINDOW PANEL. WHEN TRACK BONDING FAILED, THE SLIDING WINDOW FLEW AWAY FROM THE AIRCRAFT. HELICOPTER LANDED WITH NO FURTHER DAMAGE.SDR CA020903003Track · broken(CAN) LT AFT SLIDING WINDOW TRACK BONDING FAILURE TO WINDOW PANEL WHEN TRACK BONDING FAIL THE SLIDING WINDOW FLEW AWAY FROM AIRCRAFT. BONDING OF WINDOW TRACK TO PANEL FAILED. HELICOPTER LANDED AND NO FURTHER DAMAGED.SDR CA020813003Bracket · loose(CAN) THE 2 BOLTS THAT HOLD THE TAIL ROTOR SHAFT OUTER RING BEARING TO THE BEARING BRACKET AT FRAME 9 LT BECAME LOOSE OVER A PERIOD OF 40 HOURS FROM LAST INSPECTION AND ELONGATED THE HOLES. THE BEARING ASSEMBLY STARTED TO SPIN AND HIT THE TAIL ROTOR SHAFT COVSDR CA020903012Bracket · deformed(CAN) THE TWO BOLTS THAT HOLDS THE TAIL ROTOR SHAFT OUTER RING BEARING TO THE BEARING BRACKET AT THE FRAME. BOLTS BECAME LOOSE OVER A PERIOD OF 40 HOURS SINCE LAST INSPECTION, BOLT HOLES BECAME ELONGATED. BEARING ASSEMBLY STARTED TO SPIN AND HIT THE TAIL ROSDR CA020806011Gearbox · making metal(CAN) OIL METAL CONTAMINATION IN ENGINE GEARBOX AND GEARBOX SEND FOR INSPECTION AND REPAIR.SDR HEEA080514Seal · failedENGINE REMOVED DUE TO SMOKE AND OIL COMING FROM GEARBOX VENT. UPON INSPECTION OF GEARBOX PARTS NOTED SEAL FAILED WITH LARGE PIECE BROKEN AWAY FROM SPRING AREA. SCRAPPED SEAL.SDR CA020827008Sun Gear · cracked(CAN) CUSTOMER REPORTED TRANSMISSION TO BE MAKING METAL AT 185.1 SINCE OVERHAUL. TRANSMISSION RETURNED TO OUR FACILITY FOR TEARDOWN AND INSPECTION. ON TEARDOWN IT WAS FOUND THAT THE SUN GEAR HAD FAILED. THE SUN GEAR WAS INSTALLED NEW AT THE TIME OF OVERHAUL.SDR HEEA080675Igniter · damagedIGNITER PRODUCING A WEAK SPARK. ERODED INSULATOR. SCRAPPED.SDR CA020830003Governor · malfunctioned(CAN) GOVERNOR REMOVED FOR OVERSPEEDING AND DROOPING. REMOVED AT11485.1 INSTALLED AT11393.9 DIFFERENCE 91.2SDR 3RL072502Warning Light · illuminatedON START-UP, ENGINE CHIP LIGHT CAME ON.SDR CA021016008Pin · unstaked(CAN) POST FLIGHT INSPECTION REVEALED THE SPHERICAL BEARING ON THE DRAG PIN ASSEMBLY HAD BECOME PARTIALLY UNSTAKED. REPLACEMENT PART INSTALLED.SDR CA020729001Tip Cap · cracked(CAN) WHILE IN A STEEP DESCENT THE PILOT OBSERVED THE RIGHT HAND TIP CAP (WINGLET) GO PAST HIM AND HIT THE GROUND IN THE LANDING / WORKSITE. THE AIRCRAFT WAS LESS THAN 300 FEET AGL. THE AIRCRAFT CONTINUED DESCENT AND MADE A NORMAL POWER ON LANDING. RECOVERY ANSDR CA020829013Spline Adapter · worn(CAN) DRIVE SPLINE RETAINING CLIP AND WASHER FOUND DEPARTED FROM SHAFT. EPOXY PLUG DEPARTED.SDR CA020830002Governor · malfunctioned(CAN) GOVERNOR REMOVED FOR OVERSPEEDING AND DROOPING.SDR CA020715009Transmission · making metal(CAN) ONE CHIP LIGHT OCCURRENCE. CHIP PLUG AND FILTER INSPECTED AND AN EXCESSIVE AMOUNT OF MAGNETIC PARTICLES WERE FOUND. THE FILTER HAD BEEN INSPECTED 10 HRS PREVIOUSLY. THIS FAILURE IS USUALLY INDICATIVE OF A FAILED INPUT QUILL.SDR CA020718001Transmission · making metal(CAN) WHILE IN NORMAL CRUISE CONFIGURATION "MAIN TRANSMISSION" LIGHT ILLUMINATED. PILOT ACTIVATED PULSE CHIP DETECTOR SYSTEM AND LIGHT EXTINQUISHED. THE LIGHT RE-ILLUMINATED APPROX. 1.5 HOURS LATER. THE PILOT ONCE AGAIN ACTIVATED THE PULSE CHIP. DETECTOR SYSTESDR CA020716001Volt Regulator · unserviceable(CAN) AFTER NORMAL START, THE GENERATOR "ON" SWITCH WAS ACTIVATED, BUT THE GENERATOR DID NOT COME ON LINE.IN TROUBLESHOOTING THE PROBLEM, IT WAS TRACED TO A FAULTY VOLTAGE REGULATOR, WHICH WAS SUBSEQUENTLY REPLACED WITH AN AIRWORTHY PART.SDR HEEA080451Servo · failedNR 1 ANTI ICE INOPERATIVE AND LIGHT FLASHES.SDR HEEA080401Seal · tornENGINE REMOVED DUE TO MAKING METAL ON TEST CELL. FOUND NEW SEAL LIP TORN AND LEAKING.SDR CA020719001Blade · cracked(CAN) MAIN ROTOR BLADE CRACKED IN LOWER SKIN DISCOVERED AT STA 36.5.SDR CA020722016Blade · cracked(CAN) CRACK IN LOWER SKIN DISCOVERED AT STN 36.5. BLADE REMOVED FROM SERVICE. FURTHER ANALYSIS OF THE BLADE REVEALED THAT THE CRACK STARTED AT THE FIRST LIGHTENING HOLE OF THE "C" CHANNEL AND MOVED TO LOWER SKIN. THE CRACK THEN RAN LATERALLY TO THE TE AND TOWASDR CA020828009Bearing · cracked(CAN) M/R TRANSMISSION CHIP LIGHT WAS REPORTED. CHIP PLUGS INSPECTED AND FOUND TO HAVE LARGE AMOUNT OF DEBRIS. SOURCE FOUND TO BE THE T/R O/P PINION ROLLER BEARING. THE INNER RACE WAS FOUND TO BE CRACKED AND HEAVY SPALLING WAS ALSO OCCURRING. THIS INNER RACE ISDR HEEA079912Turbine Wheel · damagedENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON 1ST STAGE WHEEL BLADES. SCRAPPED WHEEL.SDR CA020702003Governor · failed(CAN) PILOT NOTICED THAT RESPONSE TO RPM CHANGES WAS GETTING SLOWER UNTIL GOVERNOR WOULD NOT KEEP UP TO THE RPM CHANGES. GOVERNOR WOULD DROOP UPON COLLECTIVE UP MOVEMENT BUT WOULD NOT RECOVER OR INCREASE RPM. THE SAME FOR COLLECTION DOWN MOVEMENT, THE RPM WOULSDR CA020828007Bearing · cracked(CAN) M/R CHIP LIGHT WAS REPORTED. CHIP PLUGS INSPECTED AND FOUND TO HAVE LARGE AMOUNT OF DEBRIS. SOURCE FOUND TO BE THE T/R O/P PINION ROLLER BEARING. THE INNER RACE WAS FOUND TO BE CRACKED AND HEAVY SPALLING WAS ALSO OCCURRING. THIS INNER RACE IS PRESSED ONTSDR CA020627008Pump · failed(CAN) SUPPLY FUEL BOOST PUMP FAILED.SDR ERAA080340Engine · making metalENGINE IS MAKING METAL. INITIAL INSPECTION FOUND COMPRESSOR ATTACHMENT HARDWARE LOOSE. 2 1/2 BEARING MAKING METAL, SPIN ADAPTER GEARSHAFT MAKING METAL. COMPRESSOR DUE 1750 INSPECTION. CHANGED CASE HALVES.ACTION TAKEN: INSTALLEDD NEW 2 1/2 BEARING INSTALLEDSDR HEEA079888Turbine Wheel · damagedENGINE REMOVED DUE TO 1750 HOUR INSPECTION. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON 1ST STAGE WHEEL BLADES. SCRAPPED.SDR HEEA080302Tube · crackedFOUND A STRESS CRACK IN THE FLARE OF TUBE. SCRAPPED.SDR ERAA080338Shaft · corrodedENGINE MAKING METAL. FOUND GEARSHAFT TEETH DAMAGED GEARBOX HOUSING CORRODED. ACTION TAKEN: INSTALLED NEW GEARSHAFT & OVERHAULED GEARBOX.SDR ERAA080339Bearing · making metalENGINE MAKING METAL. INITIAL INSPECTION FOUND COMPRESSOR ATTACHMENT HARDWARE LOOSE. 2 1/2 BEARING MAKING METAL. ACTION TAKEN: INSTALLED NEW 2 1/2 BEARING AND PTO GEAR. COMPLIED WITH CEB-A-1351 REPLACE OIL TUBE.
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