Allison 250-C20F
Service difficulty reports · 87
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 = '250C20F' 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 = '250C20F' 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 TLLA205070200139Engine · making metal#1 ENGINE CHIP LIGHT ILLUMINATED DURING FLIGHT. PILOT LANDED AT FIRST SAFEST SPOT AT SOUTHWEST WYOMING REGIONAL AIRPORT WITH NO INCIDENT. GROUNDED AC. SENT MECHANIC OUT AND FOUND CHIPS ON UPPER MAG. PLUG ON GEARBOXSDR CA190528012Gearbox · making metal(CAN) MAIN GEARBOX BEVEL REDUCTION (MGB) CHIP LIGHT ON AIRCRAFT STARTUP, AIRCRAFT GROUNDED. DURING STARTUP PILOT NOTICED, MGB CHIP LIGHT ILLUMINATED. PILOT SHUTDOWN, AND INSPECTED ALL MGB CHIP PLUGS. THE LOWER MGB CHIP PLUG CONTAINED A LARGE CHIP. A PICTURE SDR H0CR2018050101Compressor · delaminatedNR 1 AND 2 ENGINE POWER CHECKS WERE TRENDING DOWN. DURING ROUTINE 300HR/12MONTH INSPECTION, FOUND EXCESSIVE DELAMINATION OF THE LINING OF THE COMPRESSOR CASE HALVES ON THE ENGINES. REPLACED THE WORN CASE HALVES, AND PERFORMED POWER CHECKS, RESULTS WERE IMPROVSDR CA150603011Servo · failed(CAN) RIGHT MAIN SERVO PN 31026-110 TSO 0.0 RETURNED FROM OVERHAULED. SERVO INSTALLED ON AIRCRAFT & FAILED ELECTRICAL SERVO FUNCTION TEST. SERVO PN 31026-110 REMOVED UNENVIABLE TSO 0.0. SERVO RETURNED. DESCRIPTION OF DEFECT, SERVO LIMIT WARNING INDICATION SDR CA150411001Control Cable · frozen(CAN) AIRCRAFT WAS PARKED OUTSIDE ON COLD MORNING. DURING START, PIC NOTED NOT BEING ABLE TO BRING ENGINES FROM IDLE TO FLIGHT RPM. SUBSEQUENT INSPECTION OF CONTROL SYSTEM FOUND MOISTURE PENETRATED AND FROZE INSIDE THE FLEXIBLE CONTROL CABLE RENDERING IT INOSDR VMIA201506101671Bearing · failedENGINE FAILURE INFLIGHT DUE TO COMPRESSOR BEARING NR 2 FAILURE.SDR CA111125001Line · cracked(CAN) FLARED END OF OIL PRESSURE DELIVERY TUBE CRACKED UNDER FERRULE, CAUSING OIL PRESSURE LOSS AND SUBSEQUENT IN-FLIGHT SHUTDOWN OF RT ENGINE. US REG NR N355AG INCIDENT OCCURED 18 NOV 2011 ENGINE RECEIVED 23 NOV 2011 CRACK DISCOVERED 23 NOV 2011.SDR 2014F00158Fire Warning · activatedLEFT ENGINE FIRE LIGHT ILLUMINATED IN FLIGHT.SDR CA150108008Bearing · failed(CAN) ENGINE CHIP LIGHT ILLUMINATED. FOUND NR 5 BEARING BRINELLED.SDR CA130603019Shaft · damaged(CAN) IN FLIGHT SURGE ON NR 1 ENGINE DURING MAINTENANCE OPERATIONS, THE FCU WAS REMOVED AND FOUND INPUT SHAFT DAMAGED.SDR 2012FA0000808Servo Control · wornDURING THE ACCIDENT INVESTIGATION, ABNORMALITIES IN THE FORE & AFT SERVO ACTUATOR WERE NOTED. THE SERVO ACTUATOR WAS SENT TO THE NTSB LAB FOR EXAMINATION IN WHICH THERE IS A STRONG POSSIBILITY THAT THE UPPER ROD END ON THE FORE & AFT SERVO WAS A PROBLEM. THE SDR 2011F00023Fire Detector · false indicationWHILE FLYING TO DESTINATION, THE LT ENGINE FIRE LIGHT ILLUMINATED. 1 PASSENGER WAS ABOARD. PILOTS MADE A PRECAUTIONARY DIVERSION TO OTHER AIRPORT WHICH WAS THE CLOSEST AIRPORT. UPON LANDING, UNLOADED THE PASSENGER AND CALLED OUR MX DEPARTMENT AND OPS DEPARTSDR E30A20090704001Engine · making metalNR 1 ENGINE CHIP LIGHT ILLUMINATED ON MASTER WARNING PANEL. CHIPS FOUND ON DETECTORS, ENGINE REMOVED FOR REPAIR.SDR CA070912008Pump · defective(CAN) ENGINE AUTO-REIGNITION ACTIVATED IN FLIGHT. REPORTS OF SOFT (BANG) PRECEEDING DECEL. INVESTIGATION REVEALED AIR IN FUEL SYSTEM, SUBSEQUENT TROUBLESHOOTING FOUND ENGINE DRIVEN FUEL PUMP DEFECTIVE. (TC NR 20070912008)SDR BAQA20070011Wire Harness · fatiguedDURING CRUISE FLIGHT THE RT (NR 2) ENGINE FIRE WARNING LIGHT ILLUMINATED WITH NO SECONDARY INDICATION OBSERVED. AIRCRAFT LANDED SAFELY AT A NEARBY EMS HELIPAD WHERE TECH FOUND A BROKEN WIRE AT ONE OF THE ENGINE DETECTORS. WIRING REPAIRED IAW MFG STANDARD PRASDR BAQA200700005Compressor · seizedPILOT WENT TO START NR 1 ENGINE. ENGINE WOULD NOT TURN. FOUND ENGINE SEIZED. REMOVED AND REPLACED ENGINE ASSEMBLY. BROUGHT ENGINE TO ARC, DISASSEMBLED ENGINE AND FOUND 2 (6TH STAGE) COMPRESSOR BLADES BROKEN AND SEIZED THE COMPRESSOR, ALSO REMOVED THE TURBINE SDR MHI2005F00000Skin · cracked(REF NR: 104942) DURING INSPECTION, FOUND THE UPPER STABILIZER FIN, RT LWR DOUBLER AND NOSE SKIN CRACKED FROM THE 2ND FORWARD RIVET OF THE DOUBLER ACCROSS THE NOSE SKIN. REPLACED STABILIZER WITH SERVICEABLE STABILIZER. (K)SDR HE89099847Starter Gen · unserviceableSTARTER WOULDN'T START ENGINESDR CA040909005Pitch Link · broken(CAN) DURING CRUISE FLIGHT PILOT FELT SUDDEN VIBRATION IN THE M/R FLIGHT CONTROLS SYSTEM. A/C LANDED AT FIRST SUITABLE SITE. UPON INSPECTION, AME DISCOVERED THAT THE 'SCREW IN' RETAINING CUPS ON ONE OF THE M/R PITCH LINKS LOWER ROD ENDS DISINTEGRATED THUS ALSDR CA040811008Blower · damaged(CAN) DURING OPERATION A NOISE WAS HEARD FROM THE BACK OF THE AIRCRAFT, AIRCRAFT WAS LANDED AND DURING INSPECTION TO DETERMINE THE ORIGIN OF THE SOUND IT WAS NOTED THAT THE OIL COOLER BLOWER ASSY WAS DAMAGED AND HAD SEVERAL PIECES MISSING. THE AIRCRAFT WAS RETSDR CA040324003Bellcrank · damaged(CAN) TAIL ROTOR BELLCRANK FOUND WITH WEAR DAMAGE ON INSIDE YOKE AREA AT THE ATTACHMENT BOLT WITH THE TAIL ROTOR PITCH CHANGE SPIDER. THE WEAR CORRESPONDS TO THE BEARING SURFACE OF BALL END P/N 350A33-2150-01. IT IS SUSPECTED THAT THE ATTACHMENT BOLT WAS NOT TSDR CA040324004Ring · worn(CAN) ALL 3 DROOP RING YOKES WERE FOUND WITH WEAR DAMAGE ON OUTSIDE DIAMETER. THIS WEAR CORRESPONDS WITH WEAR FOUND ON THE DROOP RING CONTACT FITTINGS P/N 350A31-1852- 20 ON EACH STAR ARM. SUSPECT THAT THE YOKES WERE AT ONE TIME INSTALLED UNDER EACH STAR ARM SDR BAQA089603Fuel Control · malfunctionedFUEL CONTROL PRODUCING HUNG STARTS, OCCURING BETWEEN 50 PERCENT AND 60 PERCENT. REPLACED WITH SERVICEABLE UNIT. 11/10/03SDR CA031114007Connector · burned(CAN) WHILE THE AIRCRAFT WAS IN CRUISE FLIGHT, A BURNING ODOR WAS NOTICED IN THE CABIN. THE PILOT LANDED THE AIRCRAFT UNEVENTFULLY. THE BURNING ODOR WAS TRACED TO THE OVERHEAD LT FUEL PUMP SWITCH. WHEN THE OVERHEAD PANELS WERE REMOVED A BURNED PUMP SWITCH CONSDR BAQA089111Pump · leakingLEAKING FUEL FROM DRIVESHAFT. REPLACED WITH SERVICEABLE UNIT.SDR AUS20030944Skin · cracked(AUS) TAILBOOM SKIN CRACKED IN AREA LOCATED AFT OF THE TAIL ROTOR GEARBOX. CRACK ORIGINATED FROM RIVET HOLE IN TAIL ROTOR GEARBOX COWL BRACKET. CRACKED HAD EXTENDED AFT FOR APPROX 50.8MM TO 76. 2MM (2IN TO 3IN) IN AN AREA NOT NORMALLY VISIBLE WITH VERTICAL STASDR CA040806008Planetary Gear · spalled(CAN) EPI CYCLIC WAS MAKING METAL. SOURCE WAS THE PLANET GEAR INNER RACE WAS SPALLING AND MAKING METAL.SDR BAQA088838Transmitter · inoperativeTORQUE TRANSMITTER IS INOPERATIVE. REPLACED WITH SERVICEABLE UNIT.SDR CA030617002Rib · cracked(CAN) DURING ROUTINE INSPECTION OF THE UPPER VERTICAL FIN ATTACHMENT FRAME, AME DISCOVERED RIB TO BE CRACKED. RIB REPLACED AS PER REPAIR MANUAL AND A/C RETURNED TO SERVICE.SDR BAQA086321Adjuster · looseENGINE N1 IDLE ADJUSTMENT SCREW HAS FREE MOVEMENT EITHER RIGHT HAND OR LEFT HAND. REPLACED WITH SERVICEABLE UNIT.SDR CA030305003Nut · loose(CAN) FLT CREW REPORTED THAT THE ROTOR BRAKE HAD NO EFFECT WHEN APPLIED. THE ROTOR BRAKE PACK WAS BEING INSPECTED AND TO HAVE SHIMS ADJUSTED WHEN THE OUT PUT FLANGE LOCK NUT WAS FOUND ON THE DECK BELOW THE FLANGE. THE OUTPUT FLANGE WAS REMOVED AND INSPECTED WISDR BAQA082689Governor · malfunctionedNR 2 ENGINE SN 841010 WOULD NOT TRIM. REPLACED WITH SERVICEABLE UNIT.SDR BAQA081639Engine · malfunctionedENGINE FAILING POWER CHECK. REPLACED WITH SERVICEABLE UNIT.SDR BAQA081640Engine · malfunctionedENGINE FAILING POWER CHECK. REPLACED WITH SERVICEABLE UNIT.SDR CA021119003Hub · cracked(CAN) IT WAS NOTED THAT ON THE LAST SHUTDOWN A NOISE WAS BEING GENERATED FROM THE T/R BLADE ASSY REGION. IT WAS MENTIONED TO AN ENGINEER AND THEY CARRIED OUT A EQUIVALENT TO A 30 HOUR INSPECTION AS PER AD 84-064-037(B)R3. (NO DISASSEMBLY) A VERY SLIGHT NOISE SDR CA021031003Bearing · worn(CAN) AIRCRAFT IN CRUISE FLIGHT. PILOT NOTICED NG FLUCTUATION BETWEEN ENGINES, FOLLOWED BY ENGINE AT NR 2 CHIP LIGHT AND AN UNUSUAL NOISE & HOWL. PILOT SHUTDOWN NR 2 ENGINE AND MADE UNSCHEDULED LANDING AT NEARBY AIRPORT. NR 2 ENGINE COMPRESSOR SAGS FOUND WORN SDR CA020911002Bushing · debonded(CAN) ON A DAILY INSPECTION ONE BUSHING WAS FOUND TO BE DEBONDED. THE RETAINING BOLT WAS COMPLETELY PULED OUT OF THE STARFLEX. PILOT REPORTED NO ABNORMAL VIBRATION. STARFLEX ASSEMBLY REPLACED BEFORE NEXT FLIGHT.SDR CA020828005Bearing · elongated(CAN) NOISE WAS HEARD FROM OIL COOLER FAN AREA ON SHUTDOWN. INSPECTION REVEALED NR 6 T/R DRIVESHAFT SUPPORT BEARING BOLT HOLES HAD ELONGATED AND ALLOWED THE T/R DRIVESHAFT AND FAN SHAFT TO MOVE OUT OF ALIGNMENT. NR 6 BEARING SUPPORT, BEARING AND BEARING TRANSDR 2002FA0000809Spline Adapter · frettedNEW COMPRESSOR SPLINE ADAPTER WAS PURCHASED FROM MANUFACTURER. SERVICE BULLETIN T-069 WAS PACKAGED WITH THE SPLINE ADAPTER, PROVIDING INSTRUCTIONS TO MODIFY THE IMPELLER THAT THE ADAPTER WAS GOING TO BE INSTALLED IN. BULLETIN WAS LATER RECALLED BY MANUFACTURESDR CA020521008Ball Joint · worn(CAN) AFTER LAST FLIGHT INSPECTION THE LOWER ROD END WAS FOUND TO BE LOOSE. THE STAKED AREA AROUND THE BALL WAS WORN ENOUGH TO ALLOW IT TO COME OUT OF THE ROD END. NEW ROD END INSTALLED.SDR 2002FA0000789Seal · leakingMECHANIC NOTICED DRIPPING OF FLUID WHILE AIRCRAFT TOOK OFF, RADIOED PILOT AND REQUESTED AIRCRAFT TO RETURN TO BASE. INSPECTION FOUND FUEL COMING FROM (SEAL DRAIN). REMOVAL OF PUMP, INSPECTION FOUND SHAFT SEAL DETERIORATED.SDR AUS20020106Hook · faulty(AUS) SAFETY HARNESS USED BY CAMERAMAN FAULTY. SNAP HOOK ON HARNESS MAY UNDER SOME CIRCUMSTANCES HAVE THE SPRING LOADED SAFETY CATCH FORCED OPEN ALLOWING THE SNAP HOOK TO SEPARATE FROM THE AIRCRAFT ATTACHMENT POINT.SDR CA020213008Pump · making metal(CAN) NR 1 ENGINE FUEL BOOST PUMP WAS MAKING TOO MUCH NOISE AND VIBRATING AS COMPARED TO NR 2 FUEL BOOST PUMP. INSPECTED THE NR 1 ENGINE DRIVEN FUEL PUMP FILTER AND FOUND NON-FERROUS METAL IN THE FILTER. INSPECTED THE FUEL CONTROL FILTER FOR CONTAMINATION ANSDR AUS20020060Gasket · faulty(AUS) MAIN ROTOR TRANSMISSION EPICYCLIC RING GEAR GASKET FAULTY. GASKET WAS EXTRUDING FROM BETWEEN THE UPPER AND LOWER CASES AND BREAKING INTO PIECES AND CAUSING AN OIL LEAK WHICH WAS PROGRESSIVELY WORSENING. ON DISASSEMBLY THE MATING CASE FLANGES SHOWEDSIGNS SDR CA020128002Door · separated(CAN) IN CRUISE FLIGHT LT BAGGAGE DOOR DEPARTED THE AIRCRAFT, HITTING THE LT ENGINE COWL. THE AIRCRAFT WAS INSPECTED BY A QUALIFIED AME, BAGGAGE DOOR REPLACED, ENGINE COWL REPAIRED AND THE AIRCRAFT WAS RETURNED TO SERVICE.SDR 2001FA0000384Adapter · corrodedCOUPLING HAS EXCESSIVE FRETTING WEAR ON OD SURFACE. CONTINUED OPERATION MAY HAVE CAUSED FAILURE. SAME CONDITION NOTED ON OTHER COUPLINGS OF THE SAME PART NUMBER. THIS PART NUMBER IS CURRENTLY UNDER INVESTIGATION BY ROLLS-ROYCE (ALLISON ENGINE COMPANY)DUE TOSDR AUS20010846Bearing · damaged(AUS) NO2 ENGINE NO1 BEARING FAILED.SDR 20010322CW015Spline Adapter · crackedREMOVED ENGINE ASSEMBLY FOR OIL LEAKS. REMOVED COMPRESSOR AND TURBINE FROM GEAR BOX TO REPLACE SEALS AND ORINGS. INSPECTION OF SPLINE ADAPTOR FOUND CRACK RUNNING APPROX 340 DEGREES AROUND ADAPTOR. TOTAL TIME ON PART IS 555.3 SINCE LAST OVERHAUL AT WHICH TIMSDR 20001220SH008Spring · brokenDURING ROUTINE FLIGHT, PILOT EXPERIENCED A RAPID YAW TO THE RIGHT. NR 2 ENGINE, SN CAE-840415, SPOOLED DOWN TO FLIGHT IDLE AS THE RESULT OF THE NR 2 ENGINE GOVERNOR RETENTION SPRING FAILURE. GOVERNOR RETENTIONS SPRING WAS REPLACED. AIRCRAFT RETURNED TO SERISDR AU001261Case · cracked(AUS) NR 2 ENGINE LOWER COMPRESSOR CASE HALF HAD DEBONDING OF THEPLASTIC BAND SECTION BETWEEN NR 3 AND NR 4 STAGES. EXCESSIVE SPOOL RUB EVIDENT ON THE PLASTIC SECTIONS CAUSING EXCESSIVE CRACKING. CIRCUMFERENTIAL CRACKING WAS FOUND ACROSS THE ENTIRE SECTION OF
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