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 2005FA0000824Mast · crackedHELICOPTER EXPERIENCED A PROGRESSIVE LATRIAL VIBRATION. SUBSEQUENT INSPECTION FOUND 2 CRACKS FROM THE PITCH PIN SLOT AREA OF THE MAST. ONE CRACK FROM THE TOP OF ONE SLOT AND ANOTHER CRACK FROM THE BOTTOM OF THE SAME SLOT PROGRESSING THE OPPOSITE DIRECTION. SDR KBM2005F00140Battery · dischargedBATTERY DISCHARGED. REMOVED AND REPLACED. (K)SDR KBM2005F00141Relay · inoperativeRELAY INOPERATIVE, REMOVED AND REPLACED. (K)SDR CA050624001Support · failed(CAN) TURBINE ASSY DISMANTLED TO INSPECT AND REPAIR AS NECESSARY FOR A LOW POWER CONDITION, SUMP COVER P/N 6888547, 9-12 SEAL BORE EXCESSIVELY WORN, FOREIGN PARTICULATE FOUND IN 9-12 SEALBORE AREA. PT SUPPORT, 25-28 SERRATED SEAL PULLED (BROKE 3 TACKWELDS) OSDR CA051003008Labyrinth Seal · leaking(CAN) SUBJECT ENGINE WAS REMOVED FROM A/C FOR EXCESSIVE OIL VENTING FROM EXHAUST. THE DIFFUSER VENT ORIFICE HAD BEEN PREVIOUSLY ADJUSTED TO REDUCE VENTING, BUT WAS UNSUCCESSFUL. THE ENGINE WAS SENT BACK TO ENGINE SHOP FOR REPAIR. THE TURBINE WAS DISMANTLED BY SDR CA050603003Compressor · seized(CAN) OVERHAULED COMPRESSOR ASSY WAS INSTALLED ON ENGINE AS PER ALLISON 250-C20B MM. SATISFACTORY GROUND RUN/LEAK CHECKS WERE CARRIED OUT. SATISFACTORY TEST FLIGHT AND POWER CHECKS WERE CARRIED OUT. THE HELICOPTER WAS PUSHED INTO THE HANGER AND LEFT FOR TWO DASDR KBM2005F00095Volt Regulator · failedVOLTAGE REGULATOR ELECTRICAL FAILURE IN FLIGHT, REMOVED AND REPLACED. (K)SDR KBM2005F00111Disc · crackedDISC ASSEMBLY, TAIL ROTOR DRIVESHAFT DISC ASSY CRACKING, REMOVED AND REPLACED. (K)SDR KBM2005F00213Transponder · inoperativeTRANSPONDER SHOWING 5272 IN CONTROL TOWER WHEN SET ON 5252 IN AIRCRAFT. REMOVED AND REPLACED. (K)SDR KBM2005F00214Indicator · inoperativeTRANSMISSION OIL TEMP LIGHT ILLUMINATED AT 90 DEGREES C. REMOVED AND REPLACED. (K)SDR KBM2005F00212Switch · inoperativeMAIN ROTOR TRANSMISSION OIL TEMP LIGHT ILLUMINATING AT 85 DEGREES C. REMOVED AND REPLACED. (K)SDR KBM2005F00195Indicator · erraticTOT INDICATOR INDICATING ERRATICALLY. REMOVED AND REPLACED. (K)SDR CA050602006Bearing · failed(CAN) THIS WAS A NEW 2 1/2 BEARING AND NEW SPUR ADAPTER 104.4 HRS AGO , NO WARNING UNTIL STARTING, AT WHICH TIME, MAG PLUG WAS FOUND FULL. WE BELEIVE THAT THE MATERIAL WAS BAD/SOFT ON THE INNER RACE OF THE SPUR ADAPTER. WE SENT THE SUSPECTED PIECES OFF TO OUR SDR KBM2005F00070Gauge · stuckTOT GAUGE, STUCK AT TOP WHEN POWER SWITCH IS TURNED ON, DOES NOT FUNCTION PROPERLY. REMOVED AND REPLACED. (K)SDR CA050519008Engine · malfunctioned(CAN) THE AIRCRAFT WAS IN A HOVER WITH A 125 FOOT LONG LINE. THE PILOT DROPPED OFF A BATTERY AND HAD DESCENDED ABOUT 5 FT, THEN NOTICED A RAPID DESCENT AND THE RPM WAS DELAYED. ENTERED INTO AUTOROTION AND LANDED. THE PILOT ADJUSTED THE THROTTLETO IDLE AND SHUTSDR ALG2005F00026Engine · making metalDURING TAKEOFF, ENGINE CHIP LIGHT ILLUMINATED SO AC RETURNED TO BASE. MAINTENANCE CLEANED AND INSPECTED BOTH PLUGS, FOUND 2 SMALL SLIVERS ON THE LOWER PLUG. INSPECTED BOTH FILTERS FOUND OK, DRAINED AND RESERVICED OIL TANK. COMPLIED WITH A 30 MINUTE GROUND RSDR KBM2005F00093Indicator · stickingTOT GAUGE STICKING ON START UP. REMOVED AND REPLACED. (K)SDR ALG2005F00027Governor · malfunctionedON SHORT FINAL TO AIRLOG FLYWAY, POWER WAS REDUCED FOR LANDING, AC YAWED RT WITH INCREASE IN ENGINE NOISE, COLLECTIVE WAS INCREASE AND THROTTLE WAS REDUCED TO CONTROL ENGINE SPEED. ACCOMPLISHED A GO-AROUND AND LANDED USING MANUAL THROTTLE CONTROL, MAX N2 AND SDR KBM2005F00094Indicator · stickingTOT INDICATOR STICKING, REMOVED AND REPLACED. (K)SDR CA050503015Blade · cracked(CAN) CRACK FOUND DURING M/R BLADE TORQUE EVENT INSP. CRACK IS APPROX. 11 INCHES OUT FROM BLADE GRIP ON LOWER SURFACE OF BLADE. CRACK RUNS CORDWISE AND IS APPROX. 3.5INCHES LONG.SDR CA050506010Ground Wire · disconnected(CAN) DURING INSPECTION OF HELICOPTER FOR COMPLIANCE OF AD CF-2005-10 AND ASB206-05-103. (FUEL DISTRIBUTION SYSTEM INSPECTION) FOUND DISCONNECTED GROUND WIRE Q2A18N, THE WIRE WAS MOST LIKELY LEFT OFF DURING A PREVIOUS SHEET METAL REPAIR TO THE LANDING GEAR SUPSDR KBM2005F00186Encoder · inoperativeALTITUDE ENCODER, INOPERATIVE, REMOVED AND REPLACED. (K)SDR KBM2005F00071Gauge · failedTOT GAUGE, INDICATES -0- BELOW 250 DEGREES C. REMOVED AND REPLACED. (K)SDR KBM2005F00086Gauge · inoperativeENGINE OIL PRESSURE GAUGE, ENGINE OIL PRESSURE EXCEEDS HIGH RED LINE, REMOVED AND REPLACE.SDR CA050408004Shoulder Belt · frayed(CAN) THE SEAT BELT SHOULDER STRAP CHAFED ON A RETAINING BRACKET FOR THE SEAT BACK COVER ON THE PILOTS SEAT. THE CHAFING OCCURRED DURING RETRACTION AND EXTENSION OF THE INERTIA REEL OVER A PERIOD OF TWO MONTHS AND SEVERAL FLIGHTS. THE BRACKET IN QUESTION HADSDR 109040705DGDrive Shaft · damagedUPON UNCOWLING FOR A ROUTINE 600 HOUR INSPECTION, THE MAINTENANCE STAFF NOTED THE REMAINS OF A TAIL ROTOR DRIVE SHAFT RUBBER COLLAR (P/N: 109-0425-08-1) LAYING ON THE DECK BELOW ITS RESPECTIVE BEARING HANGAR. THE RUBBER COLLAR APPEARS HEAT DAMAGED AND BRITTLSDR KBM2005F00085Tach Generator · inoperativeTACH GENERATOR, INOPERATIVE 95 PERCENT OF THE TIME, DOES NOT PROVIDE SIGNAL TO INDICATE GAUGES. REMOVED AND REPLACED. (K)SDR KBM2005F00083Indicator · failedDUAL TACH, NEEDLE WILL NOT PROVIDE READING. REMOVED AND REPLACED. (K)SDR KBM2005F00084Combust Chamber · crackedCOMBUSTION CAN, CRACKED ON LEFT SIDE. REMOVED AND REPLACED. (K)SDR ALG2005F00022Throttle · misused1ST START, STARTED ENG, BEGAN HYD CHK, COMPLETED HYDR CHECK, ENG FLAMED OUT. WENT THROUGH ENG SHUTDOWN PROCEDURES, NOTICED THROTTLE WAS NOT QUITE PASSED IDLE DETENT. DUE TO THIS FACT, ATTEMPTED A SECOND START, PRIOR TO ENG IDLE, ENG FLAMED OUT. MAINT DETERMSDR CA050329015Safety Valve · broken(CAN) AERONAUTICAL ACCESSORIES PC SAFETY VALVE KIT, STC SE327AT, STA SE93-4. UPON REMOVAL FOR OVERHAUL THE ACTUATING KNOB WAS FOUND SHEARED AND HELD IN PLACE BY THE RETAINING CLIP. THE KNOB WOULD NOT HAVE FALLEN HOWEVER THE VALVE ITSELF WAS NO LONGER HELD IN SDR KBM2005F00039Indicator · inoperativeTOT GAUGE, INOPERATIVE. REMOVED AND REPLACED. (K)SDR KBM2005F00043Gyro · malfunctionedATTITUDE INDICATOR WOULD NOT CAGE PROPERLY. REMOVED AND REPLACED. (K)SDR YTRR099851Governor · malfunctionedENGINE WOULD DROOP WHEN POWER WAS APPLIED AND NOT RECOVERSDR CA050616005Switch · unserviceable(CAN) SYSTEM TEST CARRIED OUT AS PART OF THE ANNUAL FUEL SYSTEM INSPECTION. FOUND THAT THE LOW FUEL LIGHT WOULD NOT COME ON UNTIL 25 LBS INDICATED (SHOULD BE 70 LBS). LOW FUEL SWITCH REPLACED AND A/C RETURNED TO SERVICE.SDR KBM2005F00082Blade · damagedM/R BLADE, RE BLENDED DOUBLER. INSPECTED AND REPAIRED. (K)SDR KBM2005F00187Blade · debondedMAIN ROTOR BLADE, UPPER DOUBLER DEBONDING. REPAIRED BY ROTOR BLADES, INC. (K)SDR CA050308009Adapter · corroded(CAN) COMPONENT DID NOT MAKE IT THROUGH ITS LIFE EXPECTANCY. FRETTING WEAR FOUND OVER PILOT OUTSIDE DIAMETER.SDR CA050312002Bearing · worn(CAN) ENGINE CHIP LITE REPORTED BY PILOT ON ENGINE STARTUP. CHIP PLUGS CHECKED AND METAL FOUND, MAINTENANCE FOUND WORN 2.5 BEARING AND WORN INNER RACE ON SPUR ADAPTER SHAFT. BOTH ITEMS CHANGED AND A/C RETURNED TO SERVICE WITH OUT ANY FURTHER PROBLEMS.SDR CA050306001Blade · cracked(CAN) MAIN ROTOR BLADE SKIN CRACKED AT DOUBLER LIP ON BOTTOM SIDE OF BLADE CHORDWISE. CRACK LENGTH 2 INCHES. RUNS UNDERNEATH SEALANT THAT BOND DOUBLER TO THE BLADE. FOUND DURING 100 HR INSPECTION M/R TORQUE EVENT INSPECTION.SDR CA050225002Coupling · corroded(CAN) PITTING ON CIRCUMFERENCE OF COUPLING.SDR 2005F00043Starter · inoperativeSHUT DOWN THE HELICOPTER AT ICY, WHEN ATTEMPTING TO RESTART THE IGNITER WAS FIRING BUT THE COMPRESSOR WAS NOT TURNING. WENT BACK THROUGH THE CHECKLIST, ON THE SECOND ATTEMPT THE SAME THING HAPPENED, WITH MAINTENANCE PRESENT ON THE THIRD ATTEMPT THE COMPERSSORSDR CA050215006Coupling · undersize(CAN) UPON INSPECTION BEFORE BEING ENTERED INTO STORES IT WAS NOTED THAT THE BOLT HOLES WERE UNDERSIZE. THE COUPLING HAS BEEN RETURNED TO THE PARTS SUPPLIER.SDR CA050216008Channel · cracked(CAN) CRACK FOUND IN CHANNEL AT RT FORWARD ENGINE MOUNT ATTACH AREA. CRACK APPROXIMATE 1.55 INCH.SDR K2D2005F00000Blade · damagedREF: K2DA320J TAIL ROTOR BLADE ABRASION STRIP AND TIP CAP DEPARTED BLADE ASSY, INFLIGHT. (WP13200506018) (K)SDR CA050125001Indicator · malfunctioned(CAN) AFTER THE AIRCRAFT WAS COLD SOAKED FOR OVER AN HOUR, THE GUAGE RESPONSE WAS VERY SLOW WHILE THE ENGINE OIL TEMP WAS ALLOWED TO STABILIZE AT 60 DEG.SDR CA050121006Spring · broken(CAN) DURING A 600 HRS/ 12 MONTHS INSPECTION AND LUBRICATION, OVERHAUL TECH DISCOVERED THAT IN ONE OF THE DRIVE SHAFT COUPLINGS, A SPRING P/N 206-040-106-001 WAS BROKEN INTO THREE PIECES. BROKEN SPRING PIECES WORE HEAVILY INTO PARENT MATERIAL OF ALUMINIUM PLASDR ALG2005F00008Chip Detector · malfunctionedDURING TAKEOFF, AFTER MAINTENANCE INSPECTED TAIL ROTOR CHIP FROM FIRST OCCURRENCE OF FLICKERING LIGHT. DURING TAKEOFF, DURING LT TURN TAIL ROTOR CHIP LIGHT FLICKERED ON AND OFF FOR APPROXIMATELY 15 SECONDS THEN REMAINED OFF. AIRCRAFT RETURNED, MAINTENANCE RESDR CA041221005Bearing · rough(CAN) DURING BLOWER ASSEMBLY DISSASSEMBLY FOR CLEANING TAIL ROTOR DRIVESHAFT BEARING WAS FOUND TO FEEL ROUGH WHEN ROTATED.SDR CA041221006Disc · corroded(CAN) ON INSPECTION 4 DISC ASSY WHERE FOUND TO BE CORRODED AND HAD TO BE REPLACED.
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