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 KBM2004F00105Fuel Control · out of adjustFUEL CONTROL COULD NOT ADJUST. REMOVED AND REPLACED.SDR CA031223005Gear · unserviceable(CAN) CUSTOMER REPORTED METAL GEN. 51.2 HRS AFTER LAST REPAIR. REQUESTED THE RETURN OF THIS UNIT, AFTER DISASSEMBLY IT WAS NOTED THE I/P SPACER WAS WORN AGAIN, AN O/H DIMENSION CHECK (NOT REQUIRED AT THIS TIME) WAS CARRIED OUT AND THE I/P BEARING JOURNAL IS BESDR 2003121Roll Pin · loosePILOT COMPLAINED OF NOISE AND VIBRATION ON SHUT DOWN. INSPECTED MAIN ROTOR HUB, FOUND ROLL PINS ON DROOP STOP FOLLOWER ASSEMBLIES HAD BACKED OUT AND WERE CONTACTING THE LOWER SHOE. THE INTERFERENCE WAS CAUSING THE FOLLOWERS TO BE FROZEN IN PLACE. WHEN THE ASDR CA040114001Module · corroded(CAN) WATER INGRESS AND HUMIDITY FROM AIR VENTS AND DOOR SEAL LEAK. LEADS TO CORROSION AND SUBSEQUENT FAILURE OF THE WARNING LIGHTS, DIMMING MODULE LOCATED BEHIND THE INSTRUMENT PANEL.SDR ERAA094463Bypass Valve · stuckENGINE WILL NOT START UNLESS BOOST PUMPS ARE OUT. BYPASS VALVE SEEMS TO BE STUCK OPEN. ACTION TAKEN: SENT TO MFG AND OVERHAUED IAW MFG OHM FORM 15-602E.SDR CA040817001Line · cracked(CAN) FOUND A CRACK ON FLARE OF FCU SUPPLY LINE FROM FUEL PUMP. REPLACED LINE ON SITE WITH REMOVED SERVICEABLE UNIT FROM ANOTHER AIRCRAFT. LEAK CHECK C/O AND AIRCRAFT RETURNED TO SERVICE.SDR CA031209003Bladder · leaking(CAN) WHEN FUEL TANK FILLED TO MAXIMUM CAPACITY A DRIP WOULD SHOW ON THE BELLY OF THE AIRCRAFT NEAR THE FUEL CAVITY DRAIN HOLE.SDR ERAA094066Gearbox · making metalGEARBOX MAKING METAL. METAL FROM PINION GEAR AND TORQUE METER GEAR. INSTALLED NEW PINION GEAR AND TORQUE METER GEAR.SDR CA031126007Attach Fitting · cracked(CAN) CRACK LOCATED AT UPPER LT TAILBOOM ATTACHMENT FITTING (AIRFRAME SIDE), P/N 206031329001. CRACK EXTENDS BETWEEN FIRST SET OF RIVETS FORWARD OF ATTACHMENT BOLT HOLE, AS WELL AS ABOVE UPPER RIVET TO THE TOP EDGE OF THE FITTING. CRACK FOUND DURING A 100/300SDR ERAA091801Engine · making metalENGINE MAKING METAL. HEAVY WEAR ON TORQUE METER GEAR AND PINION. INSTALLED SERVICEABLE GEARBOX. COMPLIED WITH E CHECK.SDR CA031124002Support Bracket · cracked(CAN) ON A SCHEDULED 100 HR INSP, A CRACKED WAS FOUND ON THE UPPER BEARING CAP THAT SUPPORTS THE IB END OF THE COLLECTIVE JACKSHAFT. AFTER REMOVAL, IT WAS NOTED THAT THE CRACK HAD NOT YET GONE FULLY THRU THE MATERIAL. THE ASSY WAS REPLACED WITH A SERVICEABLE SDR ERAA091798Fuel Nozzle · malfunctionedFUEL NOZZLE STREAKS. INSTALLED NEW METER SET AND OUTER AIR SHROUD.SDR CA031128001Bearing · worn(CAN) DURING PERIODIC 100-HOUR INSPECTION A VIBRATION ISOLATOR BEARING WAS FOUND ROUGH. UPON DISASSEMBLY, DAMAGE WAS FOUND ON THE INNER AND OUTER RACES OF THE BEARING DUE TO LACK OF LUBRICATION. METAL PARTICLE PASTE WAS EVIDENT IN THE BEARING AREA.SDR CA031222005Gearbox · corroded(CAN) UNIT RECEIVED TO INSPECT FOR REPORTED METAL GENERATION. THE FOLLOWING WAS FOUND AT DISASSEMBLY. I/P GEAR 369D25434 U/S DUE TO SEVERE CORROSION PITS, O/P GEAR 369D 25430 ALSO PITTED BUT POLISHABLE. THE DUPLEX BEARINGS 369D25420 HAD NO CLAMP UP(.001-.003 ISDR CA031117013Stop · unserviceable(CAN) PILOT REPORTED M/R HUB ASSY STIFF TO FLAP DURING DAILY INSPECTION. UPON INVESTIGATING THE DROOP STOP ASSY WAS FOUND THAT THE ROLL PINS (P/N NAS561C5-14) THAT HOLD THE T-HEAD (P/N 369A1229-3) TO THE PLUNGER (P/N 369A1240-3) HAD WORKED THERE WAY OUT ON 3 SDR CA031126001Line · leaking(CAN) REFERENCE AIRCRAFT SB 351 054 AIRFRAME FUEL FILTER SUBSTITUTION. FUEL LINE PN 351-054-1 LEAKS THROUGH THE STAINLESS STEEL BRAIDED CASING OF THE LINE. MAINTENANCE SUSPECTS THE LINE HAS DETERIORATED WITH AGE. THE LINE WAS MANUFACTURED IN 1994 AND HAS ACCUSDR CA031222004Clutch · unserviceable(CAN) UNIT RECEIVED TO REINSPECT AFTER CUSTOMER REPORTED OIL LEAK FROM CLUTCH, (NEAR TO DRY) TO FACILITY FAA REPAIR STATION (THEY O/H THIS UNIT 88 HRS AGO). THIS FACILITY REPORTED TO THE CUSTOMER THAT THEY CHANGED THE SEAL, AND THAT WAS ALL THAT WAS NEEDED. SDR ERAA097115Scroll · brokenBROKEN STUDS ON SCROLL. OVERHAUL, INSPECTED, WELD REPAIRED CRACK, INSTALLED (24) EACH NEW STUDS, STRESS RELIEVED, REPLACED (2) EACH INSERTS, AND APPLIED.SDR CA031107004Attach Fitting · sheared(CAN) BROKEN PIN WAS FOUND ON 100 HOUR INSPECTION. LOCATION WAS AT THE JUNCTION OF SHANK AND THREADS.SDR CA031117005Leg Assy · dented(CAN) DURING ENGINE COMPRESSOR CHANGE (SCHEDULED), 6 ENGINE LEGS WERE SENT OUT TO BE STRIPPED, NDT ED, AND REPAINTED. DURING STRIPPING STAGE IT WAS NOTED THAT P/N 206-062-101-014 HAD A SMALL DENT ON IT (ABOUT 4 =FROM TOP). IT WAS FOUND TO BE BEYOND MFG LIMITATSDR CA031117006Mount · cracked(CAN) DURING AN ENGINE COMPRESSOR CHANGE (SCHEDULED), THE 3 ENGINE MOUNTS P/N 206-062-111-101 WERE SENT OUT TO BE STRIPPED, NDT , AND REPAINTED. DURING THE NDT STAGE THERE WERE CRACK INDICATIONS FOUND ON 2 OF THE MOUNTS ALONG THE TREADED PORTION. THE SUBJECT SDR AUS20031141Control Rod · corroded(AUS) TAIL ROTOR CONTROL TUBE SEVERELY CORRODED IN AREA UNDER FORWARD NYLATRON SLEEVE. INSPECTION FOUND CORROSION WAS BEYOND LIMITS AND WAS REPLACED. AIRCRAFT OPERATES IN A MARINE ENVIRONMENT.SDR CA031029007Pin · corroded(CAN) DURING SPECIAL INSPECTION OF ENGINE MOUNT LEGS, INTRODUCED ON OPERATOR'S A/C, LOWER PINS P/N 100-048-5-12 WERE FOUND TO BE SEVERELY CORRODED. ONE OF THE PINS, SEE ATTACHED PHOTO WAS SEVERED. VARYING DEGREE OF CORROSION WAS ALSO OBSERVED ON ID OF THE MSDR C2010312003MTLine · chafedDURING DAILY INSPECTION THE P/C AIR SENSE LINE WAS FOUND TO BE DAMAGED BEYOND LIMITS. THE DAMAGE WAS CAUSED BY THE THREADED PORTION OF A SCREW RUBBING AGAINST THE LINE. THE SCREW ATTACHES TWO CLAMPS TOGETHER AS REQUIRED BY CEB 1198. THE CLAMPS (P/N 6749387-03 SDR CA031103006Blade · oversized(CAN) CHAMFERS 44 DEG 30 INCHES - 45 DEG 30 INCHES (2 PLACES) X .395 - .415 DIMENSION ARE ACTUALLY OVERSIZE TO .450. BLADES CAN BE REWORKED BY RE-MACHINING THE CHAMFERS TO THE REQUIRED DIMENSION. THE CHAMFERS ARE LOCATED AT THE ROOT END OF THE BLADE WHERE IT SDR 109102103MTLever · wornDURING ROUTINE MAINTENANCE THE LEVER WAS DETERMINED TO BE WORN BEYOND LIMITS. PROBABLE CAUSE WAS LOOSE HARDWARE ATTACHING LEVER TO CONTROL LINKAGE. REF AGUSTA M.M. 76-20-00 PG 209 D 1 REQUIRES NUT TO BE "FINGER-TIGHT",TIGHTEN TO NEXT COTTER PIN SLOT AND INSTALSDR CA031222003Gear · broken(CAN) UNIT RECEIVED TO INSPECT FOR REPORTED METAL GEN. (9 PREVIOUS REPORTS) REPAIRED BY FACILITY FAA REPAIR STATION 6 TIME (10 BEARINGS REPLACED) THEN OH. LAST REPORT WAS 104.6 HRS. AFTER OH, WHEN IT WAS OPENED THE INTERIOR HAD A THICK SLUDGE THROUGHOUT. I/PSDR CA031223004Gearbox · damaged(CAN) UNIT RECEIVED AFTER REPORT OF METAL GENERATION (UNIT INSPECTED AND REPORTED NO DEFECTS AND RETURNED). CUSTOMER WAS NOT PLEASED AS THEY HAVE REPORTED METAL GEN. IN THIS UNIT 5 TIMES PREVIOUS GEARBOX WAS NOT INSTALLED ON A/C IT WAS SHIPPED TO OUR FACILITSDR ERAA093719Governor · malfunctionedSLOW TO RESPOND TO TORQUE SETTINGS. HAS 8-10 PERCENT TORQUE SPLITS ALL THE TIME. FOUND DROOPING, OVERSPEEDS EARLY, THROTTLE SHAFT STIFF, 3 INTERNAL BEARINGS ROUGH/DRY. REPAIRED AND TESTED IAW MFG OHM FORM 15-1095A.SDR ERAA093718Governor · malfunctionedTORQUE SPLIT OF 16 PERCENT. HEAVY DROOPING, HIGH HYSTERISIS. THROTTLE SHAFT BRAKING WORN, INTERNAL DRIVE BEARINGS TOUGH/DRY. REPAIRED AND TESTED IAW MFG OHM FORM 15-1095A.SDR CA031015006Cartridge · failed(CAN) FUEL BOOST PUMP STOPPED PUMPING. PUMP CHANGED.SDR ERAA093717Governor · inoperativeN2 DROPS OFF 10-12 PERCENT IN CRUISE FLIGHT AND VERY STIFF ARM. INTERNAL COMPONENTS VERY WORN FOR LOW TIME USED. POSSIBLE EXTERNAL VIBRATIONS. REPAIRED AND TESTED IAW MFG OHM FORM 15-1095A.SDR CA041001001Drive Gear · cracked(CAN) DURING A NORMAL O/H OF THE PUMP ASSY MPI INSP OF THE DRIVEN GEAR FOUND A CRACK ON THE TACH DRIVE END OF THE SHAFT. THE CRACK WAS IN THE CORNER OF THE SQUARE DRIVE. PUMP GEARS REPLACED.SDR HP62004F00000Seal · leakingFUEL PUMP FOUND LEAKING. HAD TO BLEED THE FUEL SYSTEM BEFORE FACT WHEN NO MAINTENANCE HAD BEEN ACCOMPLISHED TO THE FUEL SYSTEM AT THAT POINT IT WAS DISCOVERED THAT THE FUEL PUMP SEAL WAS LEAKING. SUSPECT THAT WAS WHY THE SYSTEM NEEDED TO BE PULLED AFTER HAVISDR CA030918010Bearing · cracked(CAN) TAIL ROTOR O/P PINION ROLLER BEARING CRACKED AND SPALLED. SPUN ON T/R O/P PINION ROLLER BEARING JOURNAL. JOURNAL NOW UNDERSIZESDR RX8R2003001Firewall · crackedUPON REMOVING THE UPPER ENGINE COMPARTMENT HEAT SHIELD FOR REPLACEMENT, A 4 INCH CRACK WAS DISCOVERED IN THE TOP OF THE ENGINE COMPARTMENT, ALONG THE RIVET LINE, WHERE THE TAIL BOOM STRUCTURE ATTACHES TO THE FIRESHIELD. OUR 2 OTHER M.D. 369E HELICOPTERS WERE ISDR CA030919002Pin · sheared(CAN) WHEN PIN WAS OPENED TO REMOVE MAIN ROTOR BLADE PIN FELL APART. IT WAS NOTED PIN WAS SHEARED OFF WHERE LAST THREAD WAS CUT.SDR EOO2003F00003Shaft · seizedPILOT COMPLAINED OF AN ERRATIC GOV. FOUND THROTTLE SHAFT SEIZED. REPLACED UNIT.SDR CA030918001Washer · missing(CAN) AFTER INSTALLATION OF TURBINE ASSEMBLY ON ENGINE, GROUND RUNS WERE BEING DONE. OIL WAS NOTICED LEAKING EXCESSIVELY FROM THE NR 6 & 7 OIL PRESSURE TEE FITTING. UPON DISASSEMBLY OF FITTING, IT WAS NOTICED THAT THE CRUSH WASHER PN MS9372019 WAS MISSING BETWSDR 2003FA0001018Coupling · frettedCOUPLING REMOVED FOR INSPECTION IAW SB T-080. HAS SEVERE FRETTING IN AREA WHICH CONTACTS IMPELLER. THIS PART WAS INSTALLED NEW IN A NEW IMPELLER. FIT IS .0005 IN. TIGHT.SDR ALG2003F00093Bleed Valve · malfunctionedON CLIMB OUT, AT 300 FT, THE PILOT REDUCED POWER FROM 90 PERCENT TORQUE TO 80 PERCENT TORQUE AND STARTED A RIGHT TURN, HE HEARD A LOUD NOISE AND THE HELICOPTER YAWED 20 FT TO THE LT, HE REDUCED POWER TO 50 PERCENT AND LANDED, UPON LANDING THE MECHANIC CHECKED SDR 200391Combust Chamber · cracked4 INCH CRACK IN OUTER COMBUSTION CAN AT REINFORCED (ARM PIT) INLET ELBOW. THE CRACK CAUSED A LOSE AND DISRUPTION OF AIRFLOW. THIS AIRFLOW LOSS CAUSED THE NR 1 TURBINE NOZZLE TO OVERHEAT AND BURN IN ONE SPOT.SDR 2004FA0000161Coupling · crackedDETECTED CRACK VIA VISUAL AND MPI INSPECTIONS DURING ROUTINE INSPECTION OF COMPRESSOR MODULE, COMPRESSOR ROTOR ASSEMBLY. DISASSEMBLED FOR INSPECTION OF FUTURE INSTALLATION. NOTED HEAVY FRETTING WEAR ON COUPLING ADAPTER OD TO IMPELLER ID FIT DIMENSION. THE CSDR 2004FA0000162Coupling · crackedDETECTED CRACK VIA VISUAL AND MPI INSPECTIONS DURING ROUTINE INSPECTION OF COMPRESSOR MODULE, COMPRESSOR ROTOR ASSEMBLY. DISASSEMBLED FOR INSPECTION OF FUTURE INSTALLATION. NOTED HEAVY FRETTING WEAR ON COUPLING ADAPTER OD TO IMPELLER ID FIT DIMENSION. THE CSDR CA030903002Manifold · failed(CAN) THE INDICATOR LIGHT FOR THE NR 1 HYD SYS WILL NOT EXTINGUISH WHEN POWERED BY THE HYDRAULIC CART NOR WILL THE RESERVOIR DRAIN INTO THE HYDRAULIC CART. (SUSPECT THE TEST SCREW ORIFICE IN THE VALVE BODY IS PLUGGED). THE HYDRAULIC POWER PACK ASSEMBLY WAS REPSDR BAQA088977Governor · erraticPT GOVERNOR HAS ERRATIC OPERATION. BEYOND ECONOMICAL REPAIR FOR TIME CONTINUED OPERATION. REQUIRES OVERHAUL OR REPLACEMENT WITH NEW CONFIGURATION GOVERNOR PER CED-1391. REPLACED WITH SERVICEABLE UNIT.SDR CA030930005Bearing · unstaked(CAN) BEARING IN PIN ASSEMBLY BECAME UNSTAKED.SDR CA030829002Nozzle · cracked(CAN) WHILE TROUBLESHOOTING AN ENGINE THAT WAS RUNNING HOTTER THAN NORMAL, WE PRFORMED A HOT SECTION INSPECTION AND FOUND THE 1ST STAGE NOZZLE CRACKED 90 DEGREES AROUND THE INNER RIM. IF THE CRACK HAD NOT BEEN FOUND, A TURBINE FAILURE MAY HAVE OCCURRED.SDR ERAA093705Fcu · out of adjustFUEL CONTROL IDLES BELOW 59 PERCENT AND WILL NOT ADJUST UP. MAKING VALVE FUEL FLOW ON HOT SIDE, IDLE FOUND ADJUSTABLE, CUTOFF SHAFT LEAKING. A REPAIRED AND TESTED IAW MFG OHM FORM 15-602E.SDR CA030912002Pin · failed(CAN) PIN FAILURE, SHEARED AT TOP THREAD OF THREADED SHANK FOR ADJUSTER NUT. CHIEF ENGINEERS COMMENTS: THIS IS THE SECOND PIN TO SHEAR ON THIS AIRCRAFT, SEEMS BOTH PINS WERE MANUFACTURED ATABOUT THE SAME TIME.
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