Allison 250-C47B
Service difficulty reports · 1,403
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 = '250C47B' 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 = '250C47B' 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 ALGA2012061901Fitting · leakingDURING ENGINE FUNCTIONAL CHECK ON ENGINE TEST CELL, ENGINE LEAKING OIL AT FITTING.SDR HEEA20120619118Bearing · spalledENGINE REMOVED FOR TURBINE OVERHAUL. NR 5 BEARING EXHIBITED SPALLING OUTER RACE AT SPLIT. REPLACED WITH NEW BEARING.SDR CA120907008Signal Cond Unit · malfunctioned(CAN) BELL HAS RECEIVED A REPORT FROM OUR CSE OF A PRIMARY TORQUE SOURCE FAILURE. EXTENSIVE TROUBLESHOOTING WITH THE ONSITE CSE HAS LED TO THE ROOT CAUSE BEING THE ENGINE SIGNAL CONDITIONER THAT CONVERTS ANALOG DATA SIGNALS TO DIGITAL TO BE ABLE TO BE SEEN BY SDR ALGA2012061803Bearing · failedENGINE CHIP LIGHT CAUSED BY PTO AFT BEARING FAILURE.SDR CA120911001Throttle Cable · disconnected(CAN) AFTER LANDING, THE ENGINE WOULD NOT RETURN TO IDLE. IT WAS SHUTDOWN USING THE FUEL VALVE. FOUND THAT THE CONTROL ASSY, THROTTLE CABLE, HAD DISCONNECTED INTERNALLY.SDR HEEA20120613173Bearing Race · spalledENGINE REMOVED DUE TO, RAN WITHOUT OIL PRESSURE. NR 5 BEARING EXHIBITED SPALLING OF OUTER RACE. INSTALLED NEW BEARING.SDR CA120906010Clamp · missing(CAN) CUSTOMER TOOK THE ENGINE TO REPAIR STATION TO HAVE THE NR 2 BEARING UPGRADED TO THE LATEST PN. UPON ENGINE DISASSEMBLY THEY FOUND THE CIRCLIP HOLDING THE SPUR ADAPTOR GEARSHAFT INTO THE COUPLING WAS MISSING. THE TEFLON RING WAS THE ONLY ITEM KEEPING THE SDR CA120907006Governor · malfunctioned(CAN) RECEIVED A REPORT FROM A PRIVATE OPERATOR THAT AN ACFT HAD AN UNCOMMANDED REVERSION TO MANUAL MODE FOLLOWED BY AN ENGINE OVERSPEED. FOLLOWING A DOWNLOAD OF THE ECU INCIDENT RECORDER IT WAS NOTED THAT THE REVERSIONARY GOVERNOR HAD FAILED AND WITHIN 5 SESDR CA120620010Seal · leaking(CAN) CUSTOMER REPORTED AN INCREASE IN ENG OIL LEVEL & A DECREASE IN HELICOPTER FREEWHEELING UNIT OIL LEVEL DURING OPERATION, OIL TRANSFER FROM ONE UNIT INTO THE OTHER. THE PROBLEM WAS IDENTIFIED BY ROUTINE PRE-FLIGHT OIL LEVEL CHECKS SHORTLY AFTER INSTALLATISDR CA120524014Scroll · cracked(CAN) 1" CRACK FOUND ON PRE-FLIGHT DAILY INSPECTION BY AME APPRENTICE ON LOWER LT SIDE OF COMPRESSOR SCROLL ADJACENT TO A WELD. HELICOPTER WAS GROUND RUN TO CONFIRM AND AIR WAS NOTED BLOWING FROM CRACKED AREA. COMPRESSOR ASSY WAS REMOVED FROM ENGINE AND SENTSDR CA120906012Wire · damaged(CAN) THE FUEL PRESSURE INDICATION WOULD GO TO 1 OR NO BARS INDICATED. THIS REQUIRED A TERMINATION OF ANY PATIENT FLIGHTS AND RETURN TO BASE MULTIPLE TIMES. THE SYSTEM SEEMED TO CHECK OUT PROPERLY WHEN MAINTENANCE SHOWED UP. EVENTUALLY, PN 407-375-007-107 INSDR QMLA2012050912075Engine · making metalWHILE ON A POST MX CHECK FLIGHT, ENGINE CHIP LIGHT ILLUMINATED IN FLIGHT. PILOT MADE A PRECAUTIONARY LANDING AT A REMOTE LZ, MX FOUND A SUBSTANSIAL AMOUNT OF METAL ON THE ENGINE ACCESSORY GEARBOX CHIP DETECTOR. ACFT REMOVED FROM SERVICE.SDR HEEA20120501940Bearing · spalledNR 5 BEARING EXHIBITS SPALLING ON OUTER RACE IN TURBINE. INSTALLED NEW NR 5 BEARING.SDR QMLA2012042712070Chip Detector · contaminatedREMOVED LOWER & MAST TRANSMISSION AND FREEWHEEL CHIP DETECTORS. ONLY THE TRANSMISSION LOWER DETECTOR HAD A SMALL AMOUNT OF FUZZ. CLEANED DETECTORS AND REINSTALLED, RAN UNIT AND REINSPECTED AFTER RUN AND RETURNED TO SERVICE IAW MM 63-14 & FIG 63-2.SDR HEEA2012042933771Bearing · spalledTURBINE REMOVED TO INSPECT FOR METAL IN OIL. ON INSPECTION OF NR 5 BEARING, FOUND SPALLING AT OUTER RACE SPLIT. SCRAP PART AND REPLACE WITH NEW.SDR CA120501005Skid · cracked(CAN) THE ENGINEER WAS CARRYING OUT A DI AND FOUND THE STINGER, TAIL SKID, LOOSE AND UPON FURTHER INSPECTION FOUND THE STINGER CRACKED AT THE BOLT HOLE. THERE WAS CORROSION IN THE AREA OF THE CRACK.SDR K2DA201205310001Turbine Wheel · failedTURBINE RUBBING SOUND DETECTED ON SHUTDOWN. TURBINE SECTION REMOVED FROM SERVICE FOR INSPECTION. INSPECTION FOUND NR 1 AND NR 2 TURBINE WHEELS RUBBING DUE TO NR 2 NOZZLE WARPING. BOTH TURBINE WHEELS AND NR 2 NOZZLE UNSERVICEABLE.SDR CA120906007Blades · broken(CAN) DURING RECEIVING INSPECTION, IT WAS REPORTED THAT 1 OF THE COMPRESSOR BLADES WAS FOUND BROKEN. DUE TO THE EXTENT OF DAMAGE FOUND ON COMPRESSOR IMPELLER, COMPRESSOR ASSY WAS DISASSEMBLED COMPLETELY. MOREOVER, THE GP SECTION WAS SEPARATED FROM THE REST OSDR ALGA201204171202Bearing · failedENGINE CHIP LIGHT. ON INSPECTION FOUND NR 5 BEARING FAILURE IN TURBINE.SDR M3XA20130726509Turbine Wheel · failedEXPERIENCED A LT YAW AND LOUD HOWLING/GRINDING SOUND FROM TRANSMISSION. NO CAUTION, ADVISORY, OR WARNING LIGHTS. LOWERED COLLECTIVE TO UNLOAD TRANSMISSION AND TO KEEP AUTO AIRSPEED, LOUD HOWL PERSISTED. LANDED.SDR QMLA2012040112042Transmission · making metalREMOVED CHIP DETECTORS. LOWER TRANSMISSION MAGNETIC CHIP DETECTOR HAD SOME FUZZ AND A SINGLE SPIKE LIKE PARTICLE JUST LONG ENOUGH TO BRIDGE THE DETECTOR. CLEANED DETECTOR, GROUND RAN AND REINSPECTED DETECTOR. RETURNED ACFT TO SERVICE CLASSIFYING CHIP AS INSSDR ALGA2012032303Diaphragm · backed outNR 1 NOZZLE DIAPHRAM BACKED OFF. INSTALLED NEW AT .835", CURRENT DIMENSION .802. FOUND TO BE CAUSE FOR LOW POWER.SDR ALGA201203200005Housing · wornFOUND XPT COATING OF SHROUD HOUSING MISSING CAUSING DECREASE IN POWER.SDR ALGA2012032000006Support · erodedFOUND MAJOR SEAL OF REAR COMPRESSOR SUPPORT ERODED AND FLAKING CAUSING VENT PROBLEMS.SDR ALGA2012320000007Liner · corrodedMAIN ROTOR MAST LINER HAS PITTING CORROSION BEYOND LIMITS.SDR CA120322009Turbine Blades · failed(CAN) PILOT REPORTED CHANGE IN ENGINE SOUND PITCH AND RETURNED TO BASE. AME CONFIRMED NOISE WAS COMING FROM TURBINE SECTION. ENGINE WAS REMOVED AND CONFIRMED THAT TURBINE SECTION HAD MULTIPLE BLADES MISSING. TURBINE BEING FORWARDED FOR TEAR DOWN INSPECTION.SDR QMLA2012031612030Panel · shortedWATER LEAK IN FLIGHT. POST SHUTDOWN, SMOKE IN COCKPIT.SDR HEEA2012031333409Bearing · spalledENGINE WAS REMOVED DUE TO LOW POWER. NR 5 BEARING EXHIBITS SPALLING AT OUTER RACE SPLIT. REPLACED WITH SERVICEABLE BEARING.SDR HEEA201203133428Wheel · damagedENGINE WAS REMOVED DUE TO LOW POWER. NR 2 WHEEL 27 KNIFE WIPED OUT ON PT SUPPORT 25-28 SEAL. NR 2 WHEEL SENT FOR INVESTIGATION AND PT SUPPORT WILL HAVE 25/28 SEAL REPLACED.SDR HEEA201203133429Support · damagedENGINE WAS REMOVED DUE TO LOW POWER. NR 2 WHEEL 27 KNIFE WIPED OUT ON PT SUPPORT 25-28 SEAL. NR2 WHEEL SENT TO MFG FOR INVESTIGATION AND PT SUPPORT WILL HAVE 25/28 SEAL REPLACED.SDR HEEA201203063408Bearing · spalledENGINE WAS REMOVED DUE TO CYCLED WHEELS. NR 5 BEARING EXHIBITS SPALLING AT OUTER RACE SPLIT. REPLACED BEARING WITH SERVICEABLE PART.SDR ALGA201203021201Bearing · wornIMPELLER NR 1 BEARING STUB SHAFT HAS EXCESSIVE WEAR FROM MATING RING.SDR CA120229008Scroll · cracked(CAN) APPROXIMATE 4" VERTICAL CRACK FOUND ON LT FORWARD SIDE OF ENGINE COMPRESSOR SCROLL DURING SCHEDULED DAILY INSPECTION. COMPLETE ENGINE REPLACED. COMPRESSOR BEING SENT FOR O/H. SCROLL IS THIN-WALL TYPE AND WILL BE EXCHANGED FOR THICK WALL VERSION.SDR HEEA2012022133208Bearing · spalledENGINE REMOVED DUE TO TURBINE O/H. NR 5 BEARING EXHIBITED SPALLING OUTER RACE. R & R NR 5 BEARING WITH NEW PART.SDR ALGA2012020100075Mast · corrodedCORROSION FOUND ON TUNGSTEN CARBIDE AREA OF MAST POLE. SENT TO HELICOPTER FOR EVALUATION IAW ASB 407-11-94 MANUAL.SDR ALGA2012012500023Bearing · separatedMAIN ROTOR HUB HAS A SEPARATED BEARING.SDR ALGA2012012500026Bearing · separatedMAIN ROTOR HUB HAS A BEARING SEPARATED.SDR ALGA2012012332412Pitch Horn · corrodedMAIN ROTOR HUB PITCH HORN CORRODED BEYOND LIMITS.SDR ALGA2012012342412Pitch Horn · corrodedMAIN ROTOR HUB PITCH HORN CORRODED BEYOND LIMITS.SDR ALGA2012012352412Pitch Horn · corrodedMAIN ROTOR HUB PITCH HORN CORRODED BEYOND LIMITS.SDR ALGA2012012362412Grip · corrodedMAIN ROTOR HUB GRIP CORRODED BEYOND LIMITS.SDR ALGA2012012372412Grip · corrodedMAIN ROTOR HUB GRIP CORRODED BEYOND LIMITS.SDR ALGA2012012382412Grip · corrodedMAIN ROTOR HUB GRIP CORRODED BEYOND LIMITS.SDR ALGA2012012392412Adapter · corrodedMAIN ROTOR HUB ADAPTER CORRODED BEYOND LIMITS.SDR ALGA2012012310412Adapter · corrodedMAIN ROTOR HUB ADAPTER CORRODED BEYOND LIMITS.SDR ALGA2012012311412Adapter · corrodedMAIN ROTOR HUB ADAPTER CORRODED BEYOND LIMITS.SDR ALGA2012012500022Skin · corrodedCORROSION FOUND ON BELLY SKIN DURING CORROSION INSPECTION. AREA FOUND TO BE OUT OF LIMITS.SDR CA120120006Nut · worn(CAN) DURING O/H OF THE MAIN TRANSMISSION ASSY DUE TO A CHIP LIGHT IN THE COCKPIT, IT WAS FOUND THAT 3 OF THE NUTS, PN 204-040-131-001 RETAINING BEARING RACE, PN 204-040-130-005 HAD 0 FT/LBS OF TORQUE. THE OTHER 2 NUTS HAD TORQUES OF 25 FT/LBS. OEM TORQUE SPSDR CA120123007Bearing · failed(CAN) PILOT WAS ON DESCENT DURING HELI SKI OPERATIONS WHEN ENGINE CHIP LIGHT ILLUMINATED. PILOT TURNED ACFT AROUND AND RETURNED TO LODGE. FOUND METALLIC PARTICLES ON ENGINE FORWARD CHIP DETECTOR. PLUG WAS CLEANED AND GROUND RUN CARRIED OUT. NO CHIP LIGHT BSDR ALGA2012011611712Tube · corrodedTUBE HAS CORROSION BEYOND REPAIRABLE LIMITS.
Back to Allison 250-C47B