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 96ZZZX2538Engine Assy · making metalPILOT NOTED A HIGH PITCH WHINE EMANATING FROM THE ENGINE AREA. A VISUAL INSPECTION WAS PERFORMED OF THE ENGINE AND DRIVE TRAIN AREAS. NO DEFECTS NOTED. THE ENGINE CHIP PLUGS WERE INSPECTED. NO METAL NOTED. APPROX 1.50 HRS AFTER INSPECTION, ENGINE CHIP LIGSDR CA960404010Control Tube · corroded(CAN) DURING ANNUAL INSPECTION SLIGHT BULGING AND PITTING FOUND ON THROTTLE CONTROL TUBE. DURING FURTHER INSPECTION THE TUBE BROKE. THE INTERIOR OF THE TUBE WAS FILLED WITH CORROSION AND THE THICKNESS OF THE TUBE WAS EXTREMELY THIN AT THE BRAKE AREA.SDR CA960315005Governor · worn(CAN)REMOVED N2 GOVERNOR TO TROUBLESHOOT TORQUE/N2 HUNTING. SPLINED ADAPTER FOUND LOOSE, CLOSER OBSERVATION SHOWED C-CLIP MISSING AND INNER SPLINES SEVERELY WORN.SDR ERAA96211Pt Support · pittedP T SUPPORT OVERHAULED AND RET'D TO ERA 6/23/95. UPON RECEIVING , INSPECTOR FOUND LARGE PIT IN AREAA11:00 OIL NOZZLE STRUT.SDR 96ZZZX2597Governor · crackedDURING A DAILY INSPECTION, MECHANIC FOUND GOVERNOR WITH .75 INCH CRACK AT AREA OF INPUT LEVER BUSHING. GOVERNOR WAS REMOVED AND REPLACED. THESE GOVERNORS HAVE A 2,000-HOUR OVERHAUL. ENGINE HAD BEEN OPERATING NORMALLY.SDR ERAA96208Nozzle · mis ohauledNOZZLE SENT TO OVERHAUL . FLANGE NOT MACHINED TO PROPER DIMENSION CAUSING NOZZLE NOT TO SEAT PROPERLY ON THE SUPPORT DURING INSTALLATION.SDR CA960502019Switch · low pressure(CAN) WHEN BOOST PUMP TURNED OFF, THE CAUTION LIGHT WOULD NOT COME ON FOR FUEL PRESSURE.SDR ERAA96205Wheel · blade stretchBLADE STRETCH .005 OVER PRINT SIZE.SDR ERAA96207Nozzle · mis ohaulNOZZLE REC'D BACK FROM OVERHAUL. ROPE PACKING GROOVE IN OUTER BAND TOO NARROW TO SEAT ROPE.SDR CA960311036Washer · leaking(CAN)FUEL LEAK CAUSED BY SEALING WASHER ON BANJO FITTING NOT PROPERLY SEALING.SDR CA960502014Cyclic Tube · cracked(CAN) DYE PENETRANT INSPECTION REVEALED A SMALL CRACK IN UPPER MOUNTING BOLT SLOT. R/H SIDE OF OUTER TUBE.SDR CA960502008Fcu · failure(CAN) DURING CRUISE FLIGHT, A TEMPORARY FLAMEOUT OCCURRED. AFTER 3-4 SECONDS, ENGINE CAME BACK ON LINE. FCU WAS REPLACED. TIME SINCE LAST REPAIR IS 189.3 HOURS. THE SUBMITTER STATES THAT THIS PARTICULAR FCU HAS A HISTORY OF PREMATURE REMOVALS.SDR ERAA96200Heat Shield · cracked band#1 HEAT SHIELD HAS 522.4 HRS ON IT AND HAS A CRACKED OUTER BAND.SDR CA960312032Fcu · failure(CAN) TIME THIS INSTALLATION SINCE LAST REPAIR 189.3 HOURS. IN FLIGHT EXPERIENCED A TEMPORARY FLAMEOUT. AFTER 3-4 SECONDS, ENGINE AND ROTOR SPEEDS BACK UP TO NORMAL. FLIGHT RESUMED TO BASE WITHOUT FURTHER INCIDENT. PAST HISTORY OF THIS FCU IS ONE OF MANY PSDR 96ZZZX1163Governor · erraticPILOT COMPLAINED MANUAL BEEPING WAS REQUIRED FOR TAKEOFF, POWER CHANGES, AND LANDING. GOVERNOR UNIT REPLACED AND SENT IN FOR REPAIR.SDR CA960312024Blade · debonding(CAN)LEADING EDGE ABRASION STRIP DEBONDING. BLADE P/N 369D21100-516A. TIME THIS INSTALLATION 589.8 HOURS.SDR CA960312025Blade · debonding(CAN)LEADING EDGE ABRASION STRIP DEBONDING. TIME THIS INSTALLATION 589.8 HOURS.SDR CA960312026Blade · debonded(CAN)LEADING EDGE ABRASION STRIP DEBONDED.SDR CA960312027Blade · debonding(CAN)LEADING EDGE STRIP DEBONDED.SDR ERAA96198Labyrinth Seal · mis mfgBEARING BORE OVER MAX DIMENSION.SDR ERAA96199Nozzle Vane · crackedNR 1 NOZZLE VANES CRACKED.SDR ERAA96197Nozzle · crackedNOZZLE WAS OVERHAULED ON DALLAS AIRMOTIVE W/O F1329, HAS 426.7 TSO AND VANES ARE CRACKED & BURNED.SDR 96ZZZX1156Tube Assy · mismanufacturedIN AN ATTEMPT TO C/W ALLISION CEB-A-1323 INSTALLATION OF NEW SCROLL-TO-PC FILTER TUBE, FOUND NEW TUBE ASSY MISSED FITTING THE FLARES BY .350 INCH. DISTORTION OR STRETCHING OF THE PC FILTER-TO-GOVERNOR TUBE ASSY WOULD BE NEEDED TO INSTALL THE NEW TUBE AS THE FSDR ERAA96193Nozzle · cracked#1 NOZZLE HAS CRACKED VANE TRAILING EDGES.SDR ERAA96194Seal · damagedBELLOWS SEAL HAS CHIPS ON SEAL FACE.SDR ERAA96195Heat Shield · crackedOUTER BAND OF #1 HEAT SHIELD IS CRACKED.SDR ERAA96196Nozzle · crackedNOZZLE WAS OVERHAULED ON AVIALL W/O C67134 . NOZZLE HAS CRACKS IN SADDLE AREAS.SDR 96ZZZX1021Nozzle · burnedNR 1 NOZZLE WAS REPLACED DUE TO EROSION AND CRACKING BEYOND LIMITS. NOZZLE SENT IN FOR OVERHAUL.SDR 96ZZZX1024Shield · warpedDURING REPLACEMENT OF NR 1 TURBINE NOZZLE, THE NOZZLE SHIELD WAS FOUND WARPED OUT OF SHAPE. PART SENT IN FOR OVERHAUL.SDR CA960312031Transceiver · static(CAN)B SIDE OF RADIO DID NOT WORK FROM INITIAL INSTALLATION, UNIT HAD VERY BAD STATIC ALSO. 23.6 HOURS SINCE OVERHAUL.SDR 96ZZZX1020Case Half · erodedDURING ANNUAL INSPECTION, THE COMPRESSOR CASE HALVES WERE FOUND ERODED BEYOND LIMITS. CASE HALVES WERE REMOVED AND SENT IN FOR OVERHAUL.SDR 96ZZZX1802Engine · making metalHEAVY METAL CONTAMINATION ON UPPER AND LOWER CHIP PLUGS. METAL FOUND IN NICAD EXTERNAL OIL FILTER ALSO. ALL CONTAMINATION WAS FERROUS METAL.SDR 96ZZZX1170Governor · erraticDURING RUN-UP, PILOT WAS ADJUSTING ENGINE 'BEEP' AND THE GOVERNOR HESITATED, BUT WHEN AN INCREASE WAS NOTED, IT JUMPED UP 3 PERCENT TO 4 PERCENT AND WAS NOT A SMOOTH TRANSITION. PART SENT IN FOR REPAIR.SDR 96ZZZX994Governor · failGOVERNOR SHAFT FAILED. REPLACED GOVERNOR.SDR CA960312023Exciter · intermittent(CAN)INTERMITTENT OPERATION, SUSPECT LOOSE INTERNAL COMPONENT AS EXCITER WORKS FOR 3-5 SECONDS IF TAPPED.SDR HEEA966641Servomotor · inoperativeSERVO MOTOR INOPERATIVE.SDR 96ZZZX1169Sump · warpedDURING ANNUAL INSPECTION, NR 6 AND NR 7 BEARING SUMP ON THE TURBINE FOUND LEAKING AT THE MATING SURFACE. SUBSEQUENT INSPECTION REVEALED FLANGE WAS WARPED.SDR 96ZZZX4829Labyrinth Seal · fracturedTURBINE WAS REMOVED DUE TO RUB. UPON DISASSEMBLY, FOUND THE GP STATOR SEAL HAD FRACTURED AT THE FORWARD END OF THE BEARING BORE. THIS TURBINE HAD THE NEW NR 8 BEARING AND RETAINING PLATE INCORPORATED PER CEB 1326. CAUSE OF FAILURE UNKNOWN.SDR CA960312008Engine · making metal(CAN) METAL CONTAMINATION FOUND IN OIL TANK AND ON ENGINE CHIP DETECTORS. ENGINE ASSEMBLY AND OIL COOLER REPLACED. HELICOPTER RETURNED TO SERVICE.SDR CA960312010Housing · loose stud(CAN)FORWARD HOUSING ASSEMBLY P/N 206-040-236-013 HAS A STUD P/N AN125982 PULLING OUT.SDR 96ZZZX1023Chip Plug · leakingDURING REMOVAL OF COMPRESSOR, CHIP PLUG FOUND LEAKING PAST THE INSULATOR. REPLACED CHIP PLUG.SDR CA960312014Tachometer · sticking(CAN)GAUGE STICKS AT LOW TEMPERATURE (-25 TO -40 DEGREES). GAUGE WORKS NORMALLY IF HEAT APPLIED TO GAUGE.SDR 96ZZZX1080Rod End · stiffDURING ANNUAL INSPECTION, THE ROD ENDS FROM THE GOVERNOR THROTTLE SHAFT TO THE BELLCRANK WERE FOUND EXTREMELY STIFF WITH SOME TEFLON RESIDUE COMING FROM THE ROD ENDS. REPLACED PARTS.SDR HEEA966477Shaft · frettedENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 1) FRETTING ON SPUR ADPATER GEARSHAFT DUE TO RETAINING RING NOT IN SPLINE ADAPTER GROOVE AND GROOVED NR 2 1/2 BEARING INNER RACE O.D. 2) EXCESSIVE WEAR ON SPLINE ADSDR HEEA966478Spline Adapter · frettingENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 1) FRETTING ON SPUR ADPATER GEARSHAFT DUE TO RETAINING RING NOT IN SPLINE ADAPTER GROOVE AND GROOVED NR 2 1/2 BEARING INNER RACE O.D. 2) EXCESSIVE WEAR ON SPLINE ADSDR HEEA966479Spiral Lock Ring · dislodgedENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 1) FRETTING ON SPUR ADPATER GEARSHAFT DUE TO RETAINING RING NOT IN SPLINE ADAPTER GROOVE AND GROOVED NR 2 1/2 BEARING INNER RACE O.D. 2) EXCESSIVE WEAR ON SPLINE ADSDR HEEA966480Bearing · defectiveENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 1) FRETTING ON SPUR ADPATER GEARSHAFT DUE TO RETAINING RING NOT IN SPLINE ADAPTER GROOVE AND GROOVED NR 2 1/2 BEARING INNER RACE O.D. 2) EXCESSIVE WEAR ON SPLINE ADSDR HEEA966481Coupling · defectiveENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: 1) FRETTING ON SPUR ADPATER GEARSHAFT DUE TO RETAINING RING NOT IN SPLINE ADAPTER GROOVE AND GROOVED NR 2 1/2 BEARING INNER RACE O.D. 2) EXCESSIVE WEAR ON SPLINE ADSDR HEEA966482Tube Assy · leakingENGINE REMOVED DUE TO OIL LEAKING AT GEARBOX SPLIT LINE. UPON INSPECTION OF GEARBOX PARTS NOTED THE FOLLOWING: OIL TRANSFER TUBE FAILED DIMENSIONAL CHECK IN ACCORDANCE WITH CEB1307. INSTALLED A NEW OIL TUBE ASSY.SDR HEEA966490Pump · defectiveSTATOR INSULATION COVERING WINDINGS HANGS OVER LIP OF HOUSING AND CANNOT BE ASSEMBLED ON PUMP.
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