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 CA131119005Nut · failed(CAN) DURING SCHEDULED INSPECTION, A NUT WAS FOUND CRACKED. ON REMOVAL, THE NUT CAME APART IN TWO PIECES.SDR CA131121008Shield · torn(CAN) WHILE COMPLYING WITH REQUIREMENTS OF CAMPAIGN NOTICE 351-63-00-025 ON TO DETERMINE THE MINIMUM GAP OF SHIELD TO MAST, THE MINIMUM GAP WAS FOUND TO BE CORRECT. THE SHIELD WAS FOUND TO BE ROLLED UP INTO THE OUTER BOOT AND LOTS OF BLACK SHREDDED RUBBER WASSDR CA131114001Blade · damaged(CAN) INSTALLED VAN HORN TAIL ROTOR BLADES ON AN ACFT FOR FLIGHT TRIALS. THE STC STATES TO DISREGARD THE MM REGARDING TAIL ROTOR FRICTION HOWEVER WHEN MEASURED FRICTION FOUND TO BE 14 LBS. ACFT FLOWN AND THERE WAS NO DECREASE IN PEDAL FORCE AS DESCRIBED IN TSDR CA131112013Fuel Control · failed(CAN) ENGINE UNCONTROLLED ACCELERATION OCCURRED DURING FLIGHT, CAUSING A MAIN ROTOR OVERSPEED TO 110 PERCENT. PILOT REDUCED THROTTLE TO MAINTAIN RPM WITHIN LIMITS AND LANDED. GROUND RUN SHOWED THE ENGINE CONTINUED TO ACCELERATE PAST IDLE DURING START SEQUENCESDR CA131028003Motor · inoperative(CAN) HEATER BLOWER MOTOR INOPERATIVE. REPLACED BLOWER MOTOR ASSEMBLY.SDR CA131028004Drive Shaft · worn(CAN) STARTER GENERATOR DAMPENER FOUND WORN DURING ACFT 100 HR INSPECTION. INTERNAL INSPECTION OF STARTER GENERATOR FOUND DRIVE SHAFT SPLINES SEVERELY WORN. STARTER GENERATOR REPLACED.SDR CA130930009Swashplate · damaged(CAN) DURING REMOVAL OF RENTAL TAIL ROTOR GEARBOX, IT WAS DISCOVERED THAT 1 OF THE DRIVE SPLINES FOR THE TAIL ROTOR SWASHPLATE WAS MISSING. THE RENTAL GEARBOX HAD BEEN INSTALLED FOR 40 HOURS AND WHEN IT WAS INSTALLED THE TAIL ROTOR SWASHPLATE HAD NO SIGNS OF SDR 2013FA0000650Bearing · failedPILOT HEARD UNUSUAL NOISE DURING START, JUST BEFORE IGNITION, 10-12 PERCENT OF N1. DESCRIBED NOISE AS A "RUMBLING-GEAR TEETH OUT OF MESH" SOUND FROM ENGINE ACCESSORIES GEARBOX. MAGNETIC METAL DETECTORS WERE FUNCTIONING BUT THE CAUTIONARY LIGHT IN THE COCKPISDR CA130925002Nut · cracked(CAN) CRACKED NUT ON TRANSMISSION DECK MOUNT FITTING, FOUND DURING 100-HR INSPECTION.SDR CA130925004Gearbox · making metal(CAN) TAIL ROTOR GEARBOX CHIP LIGHT ILLUMINATED, THE PILOT RETURNED TO STAGING. MAINTENANCE INSPECTED THE CHIP PLUG AND DISCOVERED A SMALL NR OF CHIPS, CLEANED, REINSTALLED AND FLYING RESUMED. CHIP LIGHT RETURNED THE NEXT DAY AND THE TAIL ROTOR GEARBOX WAS CHASDR 2013FA0000472Line · chafedWET LINE FROM ENGINE TORQUE FITTING TO GAUGE, CHAFED WHERE IT ENTERS THE INSTRUMENT PANEL AND HAD A SMALL LEAK. PILOT MADE AN UNSCHEDULED LANDING. MX REPAIRED THE LINE.SDR CA130926001Drive Shaft · damaged(CAN) MAIN ROTOR DRIVESHAFT FORWARD YELLOW TELE-TEMP FOUND DARKENED. MAIN ROTOR DRIVESHAFT REPLACED.SDR CA130821006Shutoff Valve · failed(CAN) THIS VALVE WOULD CLOSE FULLY, BUT WHEN SWITCHED TO THE ON, OPEN POSITION FOR FLIGHT OPERATIONS THE BALL VALVE WOULD ONLY OPEN 1/3 OF THE WAY. THE HELICOPTER RAN FINE DURING START UP, IDLE, AND LOW POWER FLIGHT OPERATIONS, WHEN THE POWER WAS INCREASED TOSDR CA130812009Control Tube · loose(CAN) WHILE DOING A DAILY INSPECTION IT WAS NOTICED THAT THE COLLECTIVE CONTROL TUBE ASSY AND CLEVIS END WAS LOOSE WHERE THE CLEVIS IS THREADED AND BONDED INTO THE CONTROL TUBE. THE CONTROL TUBE WAS REPLACED WITH A SERVICABLE UNIT.SDR CA130828012Bearing · making metal(CAN) AN ENGINE CHIP LIGHT OCCURRED. AFTER AN INSPECTION IT WAS FOUND THAT THE 2.5 BEARING WAS THE METAL AND THE 2.5 BEARING DAMAGED THE SPUR ADAPTER GEAR SHAFT ON THE COMPRESSOR.SDR CA130806006Drive Shaft · overheated(CAN) FOUND BLACKENED, INDICATING OVER-HEAT, YELLOW AND RED TEMP-PLATES ON FWD COUPLING OF MAIN DRIVESHAFT DURING A "TURN-AROUND" CHECK. SHAFT REMOVED, INSPECTED, RE-GREASED, NEW TEMPLATES INSTALLED AND SHAFT RE-INSTALLED. COUPLING OVER-HEATED AGAIN AFTER 1.SDR CA130731006Shaft · corroded(CAN) CORROSION WHERE THE FRONT SEAL RUNS ON OUTER DIAMETER OF THE INNER SHAFT.SDR CA130711008Bleed Valve · failed(CAN) DURING A TAKEOFF FOR THE 2ND FLIGHT OF THE DAY THE PILOT NOTICED ABNORMAL ENGINE PERFORMANCE WITH HIGH TEMPERATURES AND LOW ROTOR RPM. THE TAKEOFF WAS FOLLOWED BY AN IMMEDIATE LANDING AND SUBSEQUENT SYSTEMS CHECK AND A SECOND ABORTED TAKEOFF ATTEMPT. MSDR CA130711002Fuel Nozzle · failed(CAN) AIRCRAFT WAS HANGING AT 50 PERCENT N1 AT START. FUEL NOZZLE REPLACED.SDR CA130619007Blower · shorted(CAN) ACFT DEPARTED FOR LOW LEVEL FLIGHT. PILOT EXPERIENCED ELECTRICAL ODOR AND RETURNED TO AIRPORT. INVESTIGATION FOUND DEFOG BLOWER MOTOR UNSATISFACTORY. ASSY REPLACED WITH REPAIRED UNIT AND OPERATIONS RESUMED.SDR CA130624005Drive Shaft · damaged(CAN) DURING DI THE PILOT NOTED 1 YELLOW TEMPPLATE HAD TURNED BLACK. DRIVE SHAFT REPLACED.SDR EVCA2013080900001Compressor · failedWHILE IN THE TRAFFIC PATTERN, EXPERIENCED ENGINE FAILURE WHILE DEMONSTRATING A NORMAL TAKEOFF. BEGAN TO ACCELERATE FWD AND PASSED THROUGH 40 KNTS AND BEGAN TO CLIMB, THERE WAS A LOUD BANG AND A LEFT YAW OF ACFT, ACFT IS APPROX 20 FT AND 50 KNOTS. TRIMED HESDR CA130521019Freewheel Unit · blocked(CAN) THE REPORTED HE FELT THE ACFT TWITCH, AND YAW, FOLLOWED BY THE NEEDLES ON THE GAUGES FLUCTUATING, GIVING INDICATIONS OF AN ENGINE FAILURE, OR IMPENDING ENGINE FAILURE. THIS WAS FOLLOWED BY A TRANSMISSION CHIP LIGHT INDICATION ON THE WARNING PANEL. ONCESDR CA130513014Coupling · damaged(CAN) DURING THE 100/300/600 HOUR INSPECTION AN ANOMALY WAS FOUND ON THE MAIN DRIVESHAFT COUPLING. 1 FLANGE INNER SURFACE APPEARS TO HAVE BEEN TURNED DOWN ON A LATHE SO THAT IT IS APPROXIMATELY 0.050" THINNER THAN THE FLANGE ON THE OPPOSITE END OF THE COUPLINSDR JBZA20130429001Compressor · fodACFT WAS DEPARTED. DURING LIFT OFF, NR 2 ENGINE EXPERIENCED A COMPRESSOR STALL ASSOCIATED WITH UNUSUAL NOISES. LANDED WITHOUT INCIDENT. GROUND OBSERVERS REPORTED SEEING SEVERAL THREE FOOT FLAMES COMING FROM NR 2 ENGINE EXHAUST ACCOMPANIED BY SOUNDS LIKE A SDR CA130411020Governor · out of tolerance(CAN) PILOT REPORTED THAT GOVERNOR BEEP RANGE WAS OUT OF TOLERANCE. GOVERNOR COULD NOT BE ADJUSTED TO WITHIN LIMITS. GOVERNOR REPLACED.SDR CA130405009Swashplate · cracked(CAN) T/R SWASHPLATE REMOVED FROM ACFT FOR ROUTINE MAINTENANCE. DURING INSPECTION, NUMEROUS ROTATING SWASHPLATE DRIVE SPLINES WERE FOUND TO BE CRACKED AND SOME WERE BROKEN AWAY.SDR CA130408004Dampener · worn(CAN) DURING ACFT INSPECTION, THE STARTER GENERATOR WAS FOUND TO HAVE EXCESSIVE PLAY IN THE SHAFT DAMPER. STARTER GENERATOR REPLACED. SHAFT WAS REMOVED FROM STARTER GENERATOR AND SPLINES WERE FOUND TO BE SEVERELY WORN.SDR CA130228006Nut · cracked(CAN) DURING A DAILY INSPECTION, A CRACKED NUT WAS OBSERVED WHICH IS LOCATED ON THE BOLT THAT CONNECTS THE TRANSMISSION MOUNT TO THE FORWARD DECK FITTING.SDR CA130215003Window · failed(CAN) DURING NORMAL FLIGHT, THE LT BUBBLE WINDOW WAS SHATTERED AND SUCKED OUT OF THE DOOR FRAME. AFTER LANDING, ENGINEER FOUND THE WINDOW TRACK WAS ALL ATTACHED TO THE DOOR FRAME, ONLY A FEW SMALL PIECES OF PLASTIC WINDOW LT IN THE TRACK. IT APPEARS TO BE THSDR CA130220009Line · loose(CAN) FOUND WET TORQUE LINE THAT RUNS IN THE VERTICAL TUNNEL, CHAFING ON A RIVET HEAD. INSPECTED LINE FOR WEAR LIMITS AND RE-ROUTED LINE.SDR CA130130008Fuel Control · malfunctioned(CAN) UPON START UP THE ENGINE DECELERATED FROM 61 PERCENT N1 TO 50 PERCENT N1 WITHOUT PILOT INPUT. THE PILOT TRIED TO ROLL THE THROTTLE UP FURTHER WITH NO N1 REACTION. THE START WAS THEN ABORTED. A LICENSE ENGINEER WAS DISPATCHED TO THE SITE FOR TROUBLESHOSDR 2012FA0000839Chip Detector · contaminatedPILOT EXPERIENCE AN ENGINE CHIP LIGHT. PERFORMED AN UNSCEDULED LANDING. MX FOUND A 1MM SLIVER ON THE LOWER ENGINE CHIP DETECTOR. A 30 MINUTE GROUND PENALTY RUN WAS PERFORMED, THE PLUGS WERE CHECKED AND FOUND CLEAN. THE ACFT WAS RETURNED TO SERVICE.SDR JBZA201212181004Spar · crackedDURING A 300 HR INSPECTION OF THE VERTICAL FIN REAR SPAR, FOUND A 1" IN LENGTH CRACK AT STATION 9704.8.SDR CA121221010Actuator · malfunctioned(CAN) PILOT NOTICED ON PREFLIGHT GROUND CHECK THAT HIS N2 DROOP COMPENSATOR, BEEP RANGE, WAS WRONG, 103-94 PERCENT N2, INSTEAD OF REQUIRED 101-96 PERCENT AND NOTIFIED MAINTENANCE STAFF. MAINTENANCE RESET, BEEP RANGE AND INSTRUCTED PILOT TO CHECK AGAIN UPON RUSDR X33A2012121100001Fairing · missingTHE PILOT FELT TWO THUMPS AND A LOW FREQUENCY BUZZ FOR ONE SECOND. RETURNED TO BASE MECHANIC PERFORMED A VISUAL INSPECTION, REVEALING THAT THE MAIN RROTER FAIRING WAS MISSING AND THE SUPPORT STAR WAS DAMAGED. FURTHER INSPECTION IAW CHAPTER 62 TABLE 602, REVSDR CA121120012Drive Shaft · damaged(CAN) MAIN DS WAS REMOVED FOR INSPECTION. THE ATTACHING HARDWARE WAS FOUND LOOSE ON INNER COUPLING. AFTER INVESTIGATION NUTS FOUND TO HAVE ZERO DRAG, TORQUE ON THE AFFECTED BOLTS. BOLTS APPEARED TO BE IN SERVICEABLE CONDITION BUT WHEN NUTS TRIED ON "NEW" BOSDR CA121119009Float · failed(CAN) WHILE PREPARING TO FOLD A FLOAT BAG, DISCOVERED THAT THE NR 2 AND NR 3 FLOAT COMPARTMENT SEEMED TO INFLATE AND DEFLATE SIMULTANEOUSLY. AFTER A VISUAL CHECK THROUGH THE PRESSURE RELIEF VALVE IT WAS NOTICED THAT THE BULKHEAD WAS MISSING BETWEEN THE NR 2 ANSDR CA121106009Pin · loose(CAN) SPHERICAL BEARING IN DRAG PIN HAD ROLL STAKING LOOSEN ALLOWING IT TO SEPERATE FROM HOUSING AND SLIDE IN HOUSING. DRAG PIN ASSEMBLY REPLACED.SDR CA121030001Motor · burned(CAN) HEATER MOTOR FOUND UNSERVICEABLE. MOTOR HAS A BURNED ODOR. MOTOR REPLACED.SDR CA121031002Hose · leaking(CAN) FUEL WAS FOUND LEAKING FROM THE HOSE, THROUGH THE BRAIDING CLOSE TO THE 90 DEGREE FITTING.SDR CA121029009Mast · damaged(CAN) DURING ROUTINE INTERNAL MAST CORROSION, INTERNAL DAMAGE WAS FOUND 1.5" TO 2" FROM THE TOP OF THE MAST, INTERNALLY. LPI AND MPI COMPLETED AND TESTED OK BUT MAST WAS REJECTED DUE TO VISUAL DAMAGE.SDR CA121019011Drive Shaft · broken(CAN) WHILE FLYING ALONG, PILOT OBSERVED DUAL TACH SHOWING N2/NR ACCELERATING TOWARDS 110 PERCENT. THE THROTTLE WAS ROLLED TOWARDS FLIGHT IDLE IN AN EFFORT TO GAIN CONTROL. N2/NR WAS OBSERVED TO BE APPROXIMATELY 113 PERCENT BEFORE DROPPING TO JUST ABOVE 90 PSDR CA121011011Sprag Clutch · damaged(CAN) DURING THE 100 HOUR INSPECTION, THE ENGINEER NOTICED THAT THE OIL IN THE CLUTCH WAS VERY DARK. HE REMOVED THE ASSY AND DISASSEMBLED THE CLUTCH. THE SPRAG ELEMENTS WERE BROKEN DOWN FROM THE TOP.SDR JBZA201210030001Warning Light · illuminatedTRANSMISSION CHIP DETECTOR LIGHT ILLUMINATED IN-FLIGHT, ELECTED TO LAND AT A SITE OTHER THAN THE DESTINATION. FOLLOWING THE AMM AND ANALYSIS OF THE CHIPS ON THE CHIP DETECTOR AND THE TRANSMISSION FILTER, ACFT WAS FLOWN FOR FLUSHING OF THE TRANSMISSION AND RETSDR CA121004005Tube · broken(CAN) DURING FLIGHT THE PILOT FELT A RELEASE OF PRESSURE IN THE CYCLIC CONTROL AS HE WAS APPLYING PRESSURE AND TRIMMING THE CYCLIC AFT. AFTERWARDS HE WAS UNABLE TO ACTIVATE THE LONGITUDINAL TRIM ACTUATOR. HE FLEW BACK TO BASE AND UPON EXAMINATION OF THE TRIMSDR CA120912003Fuel Control · stiff(CAN) FCU LEVER STIFF WHEN FCU AT ROOM TEMP. FCU LEVER STIFFER WITH FCU HOT AFTER 10 MIN GROUND RUN. UNABLE TO MOVE THROTTLE FROM CUT-OFF TO IDLE FOR NEXT START. FCU REMOVED AND TAGGED UNSERVICEABLE.SDR CA120918018Blade · damaged(CAN) THE WEIGHT SEPARATED IN FLIGHT DAMAGED THE BLADE TIE-DOWN TIP CAP. MFG TECHNICAL BULLETIN 206-11-197, REV. REFERS TO THIS.SDR 2012FA0000577Stator Vane · failedWHILE IN FLIGHT, ENGINE LOST POWER WHICH RESULTED IN AUTO ROTATION ENDING IN HARD LANDING. FOUND THIRD STAGE EITHER STATOR OR 3RD STAGE WHEEL VANE FAILED CAUSING STAGES 4, 5, 6, 7 TO FAIL. THESE FAILURES FURTHER EXTENDED INTO COMBUSTION CAN AND TURBINE. ALLSDR 2012FA0000608Blades · damagedROTORCRAFT TOOK OFF FROM HELIPORT, AT 2-3 MINUTES INTO FLIGHT AND 1500FT MSL A LOUD NOISE WAS HEARD. PILOT HAD LOSS OF POWER, INITIATED AUTOROTATION, PUT ROTORCRAFT DOWN IN AN INTERSECTION. UPON EXITING ROTORCRAFT, FIRE WAS SPOTTED IN ENGINE COMPARTMENT. FI
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