Allison 250-C20
Service difficulty reports · 945
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 = '250C20' 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 = '250C20' 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 CA090211003Support · crackedSEVERAL CRACKS DISCOVERED WHERE SUPPORT ASSEMBLY, ATTACHES TO THE FORWARD SIDE OF THE CROSS TUBE FUNNEL. ONE CRACK EXTENDS PAST THE STANDARD REPAIR AREA AS STATED IN THE SRM. OTHER CRACKS ARE OUT SIDE THE ALLOWABLE REPAIR AREA ALONG THE 90 DEGREE BEND AT THE SDR CA090202006Frame · crackedDURING 1200 HR/12 MONTH INSPECTION AFT LEFT FRAME OF ROLLOVER BULKHEAD FOUND CRACKED. CRACK IS 2.5 INCHES LONG AND IS LOCATED AT STA 130, WL 68, AND BL 26.SDR CA090123001Fan · failed(CAN) SLIGHT VIBRATION FELT THROUGH ACCELERATION DURING START TO FLIGHT IDLE RPM. OIL COOLER FAN BRGS REPLACED AND FAN BALANCED CHECKED SERVICEABLE. VIBRATION DISAPPEARED BUT WITHIN 30 FLIGHT HOURS BEGAN INCREASING IN FREQUENCY AGAIN DURING THE SPOOL UP THEN SSDR CA090123002Drive Gear · loose(CAN) THE EXPOXY HOLDING THE RETAINING CLIP IN PLACE CAME UNBONDED, ALLOWING THE CLIP TO MOVE, THERFORE ALLOWING THE DRIVE GEAR TO DISCONNECT FROM THE SHAFT.SDR CA090130009Clutch · malfunctionedON RUNDOWN OF HELICOPTER PILOT NOTED N2 AND M/R RPM LOCKED UP. INVESTIGATED AND FOUND CLUTCH ASSY WAS NOT DISENGAGING. REMOVED AND REPLACED WITH FREE WHEEL ASSY PN206-040-270-003 TSN 11046.6 TSO 0.0HRS. CLUTCH CL42250-1 TSN0.0 HRS. SENT DAMAGED ASSEMBLY INSDR 2008FA0000721Relay · intermittentTHE PILOT REPORTED THAT AFTER TURNING ON TO THE RUNWAY FOR TAKEOFF AND APPLYING POWER THE ENGINE CHIP LIGHT CAME ON AND STAYED ON. POWER WAS REDUCED, AND TOWER APPROVED A RETURN BACK TO THE RAMP. THE AIRCRAFT NEVER APPROACED TAKEOFF SPEED. THE AIRCRAFT WAS SDR CA081201011Spindle · worn(CAN) TRANSMISSION MOUNTS REMOVED DUE TO BEARING WEAR. UPON FURTHER INSP, SPINDLE ALSO FOUND DAMAGED IN LOCATION OF WASHER P/N 206-030-507-001. HARD WASHER MOVEMENT DUE TO BEARING WEAR HAD WORN INTO THE RADII OF THE SPINDLE MOUNTING AREA. SPINDLE SCRAPED. SDR CA080917017Connector · misinstalled(CAN) INSTALLATION OF NEW 406 ELT ON INSTALLATION OF CONNECTOR FOR REMOTE SWITCH THE ELT WAS SET OFF. THE ELT WAS NOT FULLY INSTALLED SO THE ELT ACTIVATION WAS NOT NOTICED. HAVE SINCE SPOKE WITH THE MFG AND FOUND THAT THIS IS A COMMON PROBLEM WITH THE INSTALLASDR U0GA2008090478074Wire · brokenNR 2 ENGINE FIRE LIGHT ILLUMINATED IN FLIGHT. FOUND 2 BROKEN WIRES ON UPPER FIRE DETECTOR. REPLACED 2 TERMINAL ENDS AND OPS CHECK GOOD.SDR CA080822005Battery · discharged(CAN) DURING ACFT START, THE BATTERY WAS FOUND WITH NO CHARGE, BATTERY REPLACED.SDR 2008FA0000550Drive Shaft · unserviceableDURING PREFLIGHT, THE M/R DROOP STOP NUT WAS FOUND TO BE LOOSE. UPON FURTHER INSP IT WAS DETERMINED THAT M/R HUB SHOULD BE REMOVED TO LOOK FOR SIGNS OF WEAR. ONCE HUB WAS REMOVED AND INSPECTED, MODERATE WEAR (FRETTING) WAS FOUND ON DROOP STOP RETAINER PLATE (PSDR CA080718007Pump · dislodged(CAN) THE SEAL FOR THE TRANSMISSION OIL PUMP BECAME DISLODGED, AND LOSS OF OIL OCCURRED.SDR CA081209006Drive Shaft · failed(CAN) ON DESCENT PILOT SMELLED BURNING GREASE. AFTER LANDING AND POST FLIGHT INSPECTION FOUND GREASE THROWN FROM DRIVESHAFT COUPLING. DRIVESHAFT WAS REPLACED AND FOUND ISOLATION MOUNT TO BE WEAK. REPLACED ISOLATION MOUNT AND PROBLEM WENT AWAY.SDR U0GA119633Engine · inoperativeUPON LANDING, ENGINE 2 MADE AND EXPLOSIVE SOUND. NG WENT TO 0 TORQUE WENT TO 0. FUEL SUPPLY TO ENGINE TO WAS CUT OFF, ENGINE 1 WAS INCREASED TO MAX POWER AND A SUCCESSFUL RUN ON LANDING WAS MADE ON RUNWAY 17.SDR U0GA119634Engine · inoperativeDURING APPROACH, ENGINE 2 MADE EXPLOSIVE SOUND, NG WENT TO 0 TORQUE WENT TO 0. FUEL SUPPLY WAS CUT OFF, ENGINE 1 WAS INCREASED TO MAX AND A RUN ON LANDING WAS MADE WITHOUT EVENT. TO RUNWAY 17.SDR Z0A2008F00000Hydraulic Line · defectiveLOSS OF HYDRAULIC SYSTEM IN FLIGHT RESULTING IN PILOT RETURNING TO AIRPORT UNEVENTFULLY. HYDRAULIC SYSTEM HOSE WAS FOUND DEFECTIVE. (K)SDR CA080314015Gear · broken(CAN) ACFT WAS BROUGHT IN WITH XMSN NOISE AND CHIP LIGHT. XMSN WAS OPENED AND A PIECE OF GEAR TOOTH 7/8 OF AN INCH LONG WAS FOUND MISSING. THIS IS THE SECOND OCCURENCE OF THIS TYPE THAT WE HAVE ENCOUNTERED. THE LAST SDR WAS APRIL OF 2005. (TC NR 20080314015)SDR CA080314019Bearing · failed(CAN) CHIP LIGHTS METAL CONTAMINATION ENGINE SHOP DETERMINED NR 5 BEARING FAILURE. (TC NR 20080314019)SDR CA080303005Fuel Control · leakingAFTER INSTALLING THE FCU, IT WAS NOTED THAT FUEL WAS LEAKING FROM LOWER THROTTLE ARM HOUSING. FCU WAS REMOVED. (TC NR 20080303005)SDR CA080227007Bearing Race · spalledDURING FLIGHT THE PILOT HAD A CHIP LIGHT INDICATION. UPON INSPECTION, THE CHIP PLUG HAD LITTLE DEBRIS AND SMUDGE. THE CHIP WAS CLEANED, REINSTALLED AND FURTHER GROUND RUNS WHERE CARRIED OUT PRIOR TO FLIGHT. NO FURTHER ISSUES WERE NOTED AND THE FLIGHT CONTINSDR CA080227008Bearing Race · spalled(CAN) METAL WAS FOUND ON ENGINE LOWER CHIP PLUG. THE 2 1/2 BEARING IN THE GEARBOX WAS REMOVED AND FOUND THE SPALLING ON THE OUTER RACE.SDR 2008FA0000221Scroll · crackedUPON INSPECTION OF OIL COOLER FAN ASSY, FOUND MANY CRACKS AROUND THE TOP MOUNT OF SCROLL ASSY. (K)SDR CA080215005Case Half · damaged(CAN) ON SPLITTING THE COMPRESSOR CASE HALVES FOR AN INSPECTION, IT WAS NOTED THERE WERE AREAS OF THE PLASTIC COATING THAT WERE MISSING. CASES REPLACED. (TC NR 20080215005)SDR CA080821011Balance Weight · debonded(CAN) IT WAS THOUGHT THAT THE BLADE TIE DOWN WAS LEFT ON THE ACFT. THIS WAS NOT THE CASE IAW A REPORT. THE FOLLOWING OCCURRED. INSP AND SCRAPPED THE M/R BLADE DUE TO WEIGHT POCKET RETAINING HOLES DAMAGED BEYOND LIMITS. DAMAGE CAUSED BY TELL TALE LEAD COUPON (SSDR CA080227004Frame · cracked(CAN) THE UPPER RT ATTACH POINT ON THE AIRFRAME SIDE CRACKED ON THE FRAME RING ONLY. PART REPLACED WITH NEW FROM MFG. (TC NR 20080227004)SDR CA080227005Stiffener · cracked(CAN) LT STIFFENER UNDER THE OIL COOLER HANGER BEARING CRACKED FROM FWD ANCHOR NUT WHOLE. REPLACED WITH NEW PART. (TC NR 20080227005)SDR CA080228007Skid · cracked(CAN) UPON INSTALLATION OF GROUND HANDLING WHEELS IT WAS DISCOVERED THAT THE MOUNTING LUGS ON THE FWD LT SIDE WAS DETACHED AND LOOSE DUE TO LARGE PERFORATION (HOLE) IN THE ATTACHMENT AREA. FURTHER VISUAL INSPECTION REVEALED CIRCUMFERENTIAL CRACK APPROXIMATELY SDR 550001062008Unknown · odorAS PILOT STARTED DESCENT, CREW NOTICED STRONG SMOKE ODOR IN COCKPIT; FIRST ODOR WAS "CHEMICAL ODOR" WHICH QUICKLY BECAME "ELECTRICAL" IN NATURE. AS CREW LOOKED OUTSIDE TO CHECK FOR AN OUTSIDE SOURCE, PILOT CHECKED INSTRUMENTS & CAUTION LIGHT PANEL WITH NOTHINSDR CA080118001Freewheel Unit · leaking(CAN) AFTER FLIGHT THE FREEWHEEL ASSY WAS DISCOVERED LEAKING FROM THE FWD HSG CAP. FREEWHEEL ASSY CHANGED, LEAK CHECK CARRIED OUT SERVICEABLE. (TC NR 20080118001)SDR CA071204001Governor · inoperative(CAN) WHILE CARRYING OUT A START, THE ENGINE WAS SLOW TO REACH IDLE, WITH THE N2 INDICATOR STICKING ON START. ONCE DESNAGGED IT WAS DISCOVERED THE GOVENOR WAS THE CAUSE.SDR CA071126012Bulkhead · cracked(CAN) LT AFT MOUNTING HOLE FOR T/R GEARBOX FOUND CRACKED. (TC NR 20071126012)SDR CA071120004Shim · inoperative(CAN) T/R VIBRATION DISCOVERED AND SUBSEQUENT STROBING WAS NOT EFFECTIVE AT REMOVING THE VIBRATION. DURING INSPECTION OF THE T/R HUB ASSEMBLY WAS FOUND TO HAVE BOTH PRE AND POST (TB: 206-91-139) METHODS OF TRUNNION CENTERING PERFORMED. SHIM 120-006C15-0 AND THSDR 2007FA0001016Skin · wornRT AND LT FUSELAGE SKIN AT TAILBOOM ATTACH BULKHEAD. FOUND WORKING RIVETS ON BOTH SIDES. (40) FOUND SKIN UNDER WORKING RIVETS WORN .018. ASB 05-00-42 AS FACTOR. FUSELAGE SENT TO A REPAIR FACILITY FOR SKIN REPLACEMENT. (K)SDR CA071101005Magnetic Seal · leaking(CAN) ONE OF THE PILOTS NOTICED A SMALL ENGINE OIL LEAK ON BOTTOM OF ENGINE COWLING. REMOVED THE ENGINE COWLING AND FOUND LEAK ON PROP REDUCTION GEARBOX INPUT SEAL AREA. REMOVED PROP REDUCTION GEARBOX, INPUT QUILL ASSY AND REPLACED MAGNETIC SEAL. UNDER 10X MAGSDR CA071102003Boot · deteriorated(CAN) DRIVE SHAFT WAS RECENTLY INSPECTED, GREASED AS REQUIRED AT MFG. OLD BOOTS WERE SERVICEABLE, BUT AGE WAS NOT KNOWN SO REPLACEMENT WAS ELECTED AS A SAFETY PRECAUTION. NEW BOOTS INSTALLED AND DRIVE SHAFT SERVICED. 21.1 HOURS AFTER REPACK GREASE LEAK WASDR CA071024005Servo · worn(CAN) PLAY NOTED IN CYCLIC CONTROL. ONCE INVESTIGATED THE PILOT VALVE LINKAGE ON RT CYCLIC SERVO FOUND WORN BEYOND LIMITS. (TC NR 20071024005)SDR CA071023008Mechanism · worn(CAN) DURING THE TAIL ROTOR PITCH CHANGE MECHANISM PORTION OF THE 100 HOUR INSP, THE PITCH CONTROL TUBE BUSHING AND/OR BEARING WERE FOUND WORN BEYOND LIMITS ON THE CONTROL TUBE ASSY. AN EXHAUSTIVE CHECK OF PAPER WORK WAS CARRIED OUT FOR THE TSN AND TSO, THESESDR CA071015004Spline · failed(CAN) PILOT COMPLAINED OF EXCESSIVE (ROTOR) DROOPING. CHECKED AIRCRAFT RIGGING AND LOOSE ENGINE AIR LINES. REMOVED GOVERNOR FOR BLEED CLEANING AND THE DRIVE ASSY ON THE GOVERNOR WAS COMPLETELY DISCONNECTED FROM THE PT GOVERNOR. COMPONENT WAS SHIPPED FOR FURTHESDR CA071026001Starter Gen · defective(CAN) DURING SHUTDOWN, IT WAS NOTED THAT A NOISE WAS COMING FROM THE ENGINE BAY AREA. FURTHER INVESTIGATION NOTED THE STARTER GEN REQUIRED TO BE REPLACED. STARTER GEN WAS REPLACED FOR NO FURTHER DEFECTS. (TC NR 20071026001)SDR CA071010003Combustion Case · cracked(CAN) PILOT RETURNING TO BASE REPORTED HIGHER THAN NORMAL ENGINE TEMP. INSP OF THE ENG INDICATION SYS FOUND SERVICEABLE. INSP OF THE ENGINE FOUND A CRACK IN THE COMBUSTION CASE. COMBUSTION CASE REPLACED. AC GROUND RUN AND FOUND SERVICEABLE AND RETURNED TO SERSDR CA070919008Shaft · seized(CAN) WHILE THE PILOT WAS DOING HIS PREFLIGHT SYSTEM CHECKS, HE NOTICED THAT HIS GOVERNOR RANGE HAD SHIFTED DOWN FROM THE NORMAL RANGE OF 100 PERCENT DOWN TO 97 NR ROTOR RPM. THE GOVERNOR WAS INSPECTED BY THE ENGINEER AND HE FOUND THAT THE GOVERNOR LEVER SHAFTSDR CA070917001Pin · brinelled(CAN) DURING ROUTINE MAINTENANCE, FLIGHT CONTROL CHECKS REVEALED A RATCHET SENSATION DURING MOVEMENT OF SHOULDER PIN ON LT LATERAL SERVO. PIN REMOVED AND INSPECTED REVEALING INDICATIONS OF BRINELLING AND THE POSSIBILITY OF PLATING WHICH HAS BEEN ADDRESSED BY ASDR CA070924002Drive Gear · broken(CAN) MAIN ROTOR TRANSMISSION REMOVED DUE TO CHIP LIGHT ILLUMINATION. TRANSMISSION RETURNED TO HELICOPTERS COMPONENT OVERHAUL SHOP FOR REPAIR. UPON DISMANTLE IT WAS DISCOVERED THAT THE I/P GEAR HAD FAILED AND EXHIBITED ONE COMPLETE TOOTH BROKEN OFF FROM THE GESDR 2007FA0000838Bearing · failedPILOT REPORTED CHIP LIGHT CAME ON DURING TRAINING FLIGHT. LANDED AS SOON AS POSSIBLE AND PROBE REMOVED AND CLEANED. GROUND RUN MADE IAW MM AND CHIP PULLED AND INSPECTED. MORE METAL FOUND SO ENGINE REMOVED FROM AC AND INSPECTED. FOUND NR 1 BEARING OF COMPRESDR CA070724006Engine · overheated(CAN) THE PILOT HAD JUST TAKEN HIS FINGER OFF THE THE STARTER ON STARTUP AND WAS REVIEWING HIS COMPANY PILOT MINI LOG WHEN HE NOTED A DIFFERENT ENGINE SOUND AS THOUGH IT HAD INCREASED. WHILE CHECKING THE THROTTLE AND SCANNING THE GAUGES THE PILOT NOTICED THAT SDR CA070720011Bolt · cracked(CAN) MAIN ROTOR PARTS SENT TO NDT FOR INSPECTION AND ON MAGNAFLUX INSPECTIION FOUND STRAP BOLT CRACKED ON SHANK ABOUT ONE QUARTER WAY AROUND. PART SENT TO BELL HELICOPTER LAB FOR FURTHER INVESTIGATION. BOLT WAS PURCHASED NEW ON MARCH 14,2005 (TC NR 2007072001SDR 2007FA0000692Rib · crackedDURING THE COURSE OF A SCHEDULED INSPECTION, THE RT HORIZONTAL STABILIZER WAS REMOVED TO TROUBLESHOOT A PROBLEM WITH AN AUXILIARY STROBE LIGHT THAT IS ATTACHED TO THE STABILIZER. DURING REMOVAL, THE FLANGE ON THE IB RIB THAT ATTACHES THE STABILIZER TO THE TAISDR CA070703003Cartridge · unserviceable(CAN) CAUTION LIGHT ILLUMINATED DURING FLIGHT INDICATING A BOOST PUMP FAILURE. FUEL SYSTEM INSPECTED FWD BOOST FOUND TO BE NOT OPERATING. CARTRIDGE CHANGED OUT WITH AN OVERHAULED UNIT.FUEL SYSTEM SERVICABLE. (TC NR 20070703003)SDR CA070622005Indicator · defective(CAN) FUEL QUANTITY INDICATOR WAS REMOVED DUE TO INDICATION PROBLEMS. WHEN REMOVED IT WAS FOUND THAT THE FLOAT WAS FULL OF FUEL AND ONE OF THE DECALS FROM PHP WAS GONE AND WAS IN THE FUEL SYSTEM. DECAL WAS LOCATED AND SENDER IS BEING REPLACED WITH A NEW UNITSDR CA071001006Shaft · cracked(CAN) POWER TURBINE ACTION DISMANTLED TO DETERMINE CAUSE OF OIL CONSUMPTION AND SMOKING. UPON TEARDOWN AND DETAIL INSPECTION IT WAS NOTED THAT THE PT OUTER SHAFT HAD A LARGE CRACK ORIGINATING AT ROOT OF 1 CURVIC COUPLINGS AND SPLITTING INTO 2 FURTHER DOWN SHAF
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