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 CA020815007Intake Duct · separated(CAN) ONE NUT PLATE HOLDING THE INTAKE BELL MOUTH TO THE FIRE WALL DEPARTED FROM ITS MOUNTING AND WAS INGESTED BY THE COMPRESSOR. THIS CAUSED A VIOLENT YAW AND PARTIAL LOSS OF POWER. THE PILOT ENTER AN AUTO-ROTATION AND LANDED SUCCESFULLY WITH MINIMAL DAMAGE TSDR ALGA079857Blade · missingUPON INSPECTION OF ALL PARTS NR 2 WHEEL HAD ONE BLADE MISSING.SDR HEEA079882Gear · wornENGINE REMOVED DUE TO RECURRING CHIP LIGHTS. HEAVY STEP WEAR ON GEAR TEETH CAUSING PROBLEM IN EXCESS FOR NORMAL WEAR. REQUEST CREDIT REIMBURSEMENT ON AFA#63953A.SDR HEEA079883Gear · wornENGINE REMOVED DUE TO RECURRING CHIP LIGHTS. HEAVY STEP WEAR ON GEARTEETH CAUSING PROBLEM IN EXCESS FOR NORMAL WEAR.SDR ERAA080325Engine · leakingENGINE ASSY LEAKING AT SPLIT LINE. PULLED STUDS ON GEARBOX AND RESET STUDSSDR HEEA079375Turbine Wheel · crackedTURBINE REMOVED FOR HIGH CYCLED WHEELS. UPON INSPECTION OF PARTS NOTED SULFIDATION AND CRACKED NR 1 WHEEL BLADES. SCRAPPED WHEEL.SDR CA020530001Spring · broken(CAN) DURING OPERATION 1 ON RT ENGINE, THE SPRING (GOVERNOR LEVER RETURN SPRING) WAS FOUND BROKEN AND REPLACED WITH A NEW SPRING.SDR CA020607004Spring · broken(CAN) DURING A OPS NR 1 ON RT ENGINE, THE SPRING P/N 105-60583.12 WAS FOUND BROKEN.SPRING WAS REPLACED WITH A NEW SPRING P/N 105-60583.12.SDR CA030602003Bolt · incorrect(CAN) WHILE COMPLYING WITH FLEET CAMPAIGN NOTICE 351-73-20-12 IT WAS FOUND THAT THE BOLT CONNECTING THE TWO NR 2 GOVERNOR CABLES TO THE HYDRAULIC PACK WAS TOO SHORT ONLY ONE THREAD WAS SHOWING THROUGH THE ANCHOR NUT. A NEW BOLT WAS INSTALLED AND THE AIRCRAFT WSDR CA020708007Support · mismanufactured(CAN) SUPPORT FOUND TO HAVE MACHINING MARK ABOVE BASE OF SUPPORT. THISSUPPORT WAS NEW CONDITION AND HAD NOT BEEN PLACED IN SERVICE.SDR HEEA079286Bleed Valve · failedFAILED BLEED VALVE ALLOWING ENGINE TO PRODUCE HIGH TOT.SDR PHA2002F00000Lockwasher · crackedDURING 100 HOUR INSPECTION CLUTCH (PN 369A5350-51) WAS REMOVED FOR SERVICE. LOCK WASHER (PN369A5358) WAS FOUND TO HAVE CRACKED IN 3 PLACES, THIS ALLOWED THESE FRAGMENTS TO SLING OUT FROM THE CLLUTCH WHICH TURNS AT 6200 RPM AND RIDE AGAINST THE INTERIOR OF THSDR 2002FA0000685Nozzle · detachedA FOREIGN OPERATOR REPORTED A SUDDEN LOSS OF POWER IN-FLIGHT WITH NOISE FROM IDLE TO SHUTDOWN. THE TURBINE ASSEMBLY WAS REMOVED AND RETURNED TO THE US REPAIR FACILITY THAT PERFORMED THE LAST OVERHAUL. THE NR 1 SECTION MADE NOISE WHILE TURNING BY HAD AFTER TUSDR CA020523011Blade · damaged(CAN) DURING 100 HOUR INSPECTION A "TONAL" DIFFERENCE WAS NOTED ON THE MAIN ROTOR BLADE IN THE AREA CALLED OUT IN SEC.90 OF THIS SNEET ABOUT 1/4 INCH AFT OF THE LEADING EDGE ON THE UPPER SURFACE. DUE TO NUMEROUS PREVIOUS PROBLEMS WITH THIS MANUFACTURER (HTC)SDR ERAA079868Governor · slowARM SHAFT STIFF, SLOW TO RESPONSE. DROOPING OUT OF SERVICE LIMITS. FOUND INTERNAL BEARINGS ROUGH/DRY, ECCENTRIC SHAFT UNDERSIZE; WORN, THROTTLE BUSHING WORN, OVERSIZE.SDR ERAA079869Governor · wornCAUSES NR TO BLEED OFF AFTER BEEPED TO 100 PERCENT. COVERED BY SEVERE PREMATURE WEAR. EVIDENCE OF TORSIONAL RESONANCE CONDITION BETWEEN PTG DRIVE & GEAR BOX DRIVE. WATER / RUST ON SEVERAL PARTS. SPEEDER SPRING & 2D CAM LEVER. ACTION TAKEN: SET PTG TORSIONSDR 2002FA0000779Seal · leakingAFTER OIL SEAL REPLACEMENT, AND REINSTALLATION OF FUEL PUMP, THE PUMP SHAFT SEAL WAS DISCOVERED LEAKING. DURING BOOST PUMP OPERATION FOR BLEEDING , FUEL SYSTEM ABOUT 50/60 + PER MINUTE DROP LATE. REPLACED PUMPSDR LS1R088282Pump · inoperativeFUEL PUMP INOPERATIVE.SDR 2002FA0000663Turbine Wheel · destroyedTURBINE WAS RECEIVED FOR REPAIR DUE TO N1 LOCK-UP. UPON DISASSEMBLY FOUND THAT THE DIAPHRAGM HAD SEPARATED FROM THE CASTING AND WAS REDUCED TO SEVERAL SMALL PIECES. ALSO FOUND THE FIRST AND SECOND STAGE TURBINE WHEELS HAD SUSTAINED SEVERE DAMAGED DUE TO CONTSDR CA020507004Hub · misoverhauled(CAN) 80.8 HOURS AFTER INSTALLATION OF A MAIN ROTOR HUB, RECEIVED FROM FACTORY OVERHAUL, THE SEAL POPPED OUT OF KIT LOCATION. IT WOULD APPEAR THAT NO BONDING AGENT OF ANY KIND WAS USED TO RETAIN THE SEAL.SDR CA021016006Pump · failed(CAN) A FUEL PUMP FAILURE LIGHT ILLUMINATED ON CAUTION PANEL DURING FLIGHT. IT WAS DETERMINED THAT THE AFT FUEL PUMP HAD FAILED. FAULTY CARTRIDGE WAS REPLACED WITH AIRWORTHY UNIT, PUMP PRESSURES CORRECTED.SDR LS1R088288Nozzle · failedNOZZLE FLAMES OUT AT 20 PERCENT N1.SDR CA020828008Bearing · cracked(CAN) DURING A SEAL CHANGE A CRACK WAS DETECTED ON THE INNER RACE OF THE T/R O/P PINION ROLLER BEARING. THIS INNER RACE IS PRESSED ONTO THE PINION WITH AN INTERFERENCE FIT.SDR AUS20020438Filter · blocked(AUS) HYDRAULIC FILTER BLOCKED. DIFFERENTIAL PRESSURE INDICATOR BUTTON INOPERATIVE.SDR CA020430008Torque Tube · cracked(CAN) THE TORQUE TUBE P/N 206-062-708-007 WAS FOUND CRACKED IN THE SHEAR AREA. THE CAUSE OF THE CRACKS WERE DETERMINED TO BE CAUSED BY THE GOVERNOR BECAUSE THE ARM WAS EXTREMELY HARD TO MOVE. NO COMPLAINTS FROM PILOT TO INDICATE A N2 PROBLEM. BOTH PARTS REPLACSDR 2002FA0000491Bearing · wornBOTH MAGNETO DRIVE BEARINGS WERE LOOSE, REMOVED AND FOUND BOTH BEARINGS WORN AND ROUGH.SDR ERAA078460Bearing · wornENGINE IS MAKING METAL. FOUND ROLLER ON 2 1/2 BEARING DAMAGED. GEARBOX PN 6894171 SN CAG-39145 INSTALLED. REPAIRED GEARBOX PN 6894171, SN CAG-23194. GEASHAFT DAMAGED, PN E23031922, SN CI-21-536, O/H OIL CHECK VALVE PN 23031856. ACTION TAKEN: INSTALLED REPSDR ERAA078461Turbine · failedTOT INDICATING AMBIENT TEMPERATURE. ACTION TAKEN: SENT HARNESS OUT FOR REPAIR. BURNED VANES ON NR 1 NOZZLE. INSTALLED NEW TAT HARNESS AND NR 1 NOZZLE.SDR CA020425001Exciter · failed(CAN) NO LIGHT OFF DUE TO FAULTY PART. CAN CAUSE A REAL PROBLEM IN REMOTE AREA.SDR ERAA078452Governor · malfunctionedGOVERNOR DROOPING EXCESSIVELY, OUT OF SERVICE LIMITS. INTERNAL BEARINGS FOUND ROUGH / RATCHETY, DRIVESHAFT SPLINES WORN BEYOND LIMITS, DRIVE SLEEVE SPLINES WORN, GOVERNOR WEIGHTS WORN FLAT.SDR ERAA078453Diaphragm · deformedNR 1 STARTS HUNTING UP & DOWN AFTER 10-20 MIN. GOVERNOR BLEEDS OFF 200 RPM TOO EARLY. GOVERNOR LEVER, CAM LEVER AND FLY WEIGHT BEARINGS FOUND ROUGH AND DRY. PR DIAPHRAGM FOUND DEFORMED.SDR ERAA078455Bearing · roughGOVERNOR HITS MAX STOP WITH COLLECTIVE UP. DROOPING AND OVERSPEEDING EARLY. FOUND CAN LEVER OVERSIZED, ECCENTRIC SHAFT UNDERSIZED, SIX INTERNAL BEARINGS FOUND ROUGH/ RATCHETY.SDR CA020408005Combustion Liner · cracked(CAN) ENGINE PERFORMANCE DETERIORATED, POWER CHECK CARRIED OUT, ENGINE DID NOT MEET SPECIFICATIONS. VISUAL INSPECTION REVEALED A CRACK IN LT ARMPIT OF THE OUTER COMBUSTION CAN. THE CAN WAS REPLACED.SDR CA020507023Bearing · spalled(CAN) REMOVED FOR METAL CONTAMINATION. DISASSEMBLED OUTER RACE OF BEARING AND IT SHOWS SIGNS OF EXCESSIVE PEELING 14.5 MM BY 78 MM,AREA 1131 SQ MM.SDR HEF2002F00000Sleeve · erraticSLEEVE BROKEN AT GLUE JOINT. CAUSED ERRATIC FUEL CONTROL.SDR CA020521006Skin · cracked(CAN) A 1.5 INCH CRACK WAS FOUND EMMINATING FROM A RIVET ON THE LT SIDE OF THE BOOM AT STA 136.9. THE CRACK FORMED DOWNWARD TO THE EDGE OF THE UPPER SKIN AND UPWARD FOR APPROXIMATELY 1.25 INCHES. TAILBOOM WAS REPAIRED IN ACCORDANCE WITH BELL SRM. NR 1 BEARING SDR 2002FA0000544Bleed Valve · erraticDURING FLIGHT THE COMPRESSOR STALLED A COUPLE OF TIMES. BOTH DURING A POWER CHANGE AND IN A STABLE POWER SETTING. REMOVED BLEED VALVE AND REPLACED WITH A SERVICEABLE UNIT AND THE PROBLEM WAS CORRECTED.SDR CA020319003Compressor · failed(CAN) ON THE 3RD START OF THE DAY THE PILOT COULD NOT MOTOR THE ENGINE TO START THE AIRCRAFT. PULLED THE STARTER AND TRIED TO TURN N1 GEARTRAIN AND WAS UNABLE TO TURN. TRIED TO TURN THE COMPRESSOR THRU THE BYPASS DOOR BY HAND AND WAS UNABLE TO TURN. REMOVED THSDR CA020430004Torque Tube · cracked(CAN) -PILOT NOTICED LOSS OF T/R AUTHORITY WITH A SPONGY FEEL JUST AS HE WAS PULLING INTO A HOVER. HELICOPTER WAS LANDED AND SHUTDOWN.- T/R PEDAL ASSEMBLY WAS FOUND CRACKED ALMOST 360 DEGREES.- CRACK ORIGINATED FROM UNDER 369A7511 FITTING WHERE THE ATTACH HOLESDR CA020327007Bellows · frozen(CAN) WATER HAD FROZEN IN DUST BOOT AND RESTRICTED MOVEMENT OF LONGITUDINAL CONTROL ROD. BELOW HYDRAULIC PACK, ICE REMOVED, THAWED, DRIED OUT AND LIGHTLY SPRAYED WITH METHYL ALCOHOL TO REMOVE ANY FURTHER MOISTURE.SDR CA020322002Sleeve · rough(CAN) DURING MAINTENANCE TO REPLACE RUDDER BELLOWS BETWEEN SUBJECT SLIDING SLEEVE WAS FOUND TO BE VOID OF GREASE AND THE DUPLEX BEARINGS WERE DRY AND "RATTLING" WHEN SPAN. BASE MAINTENANCE STAFF WERE UNAWARE OF THE PRESENCE OF A NEEDLE POINT GREASE FITTING ON SDR CA020312007Case · ruptured(CAN) - AFTER START, FUEL FILTER CLOG LIGHT CAME ON. AIRCRAFT SHUT DOWN AND FOUND FUEL LEAK FROM FILTER HEAD & FOUND BROKEN CASTING. INVESTIGATION FOUND THAT AN INPROPER FUEL VALVE ASSY WAS INSTALLED. THE ASSY DID NOT ALLOW THE SYSTEM TO BLEED OFF IN THE ESDR CA020307011Angle · cracked(CAN) WHILE COMPLETING INTERIOR REPAINTING PROCESS, TWO CRACKS WERE DISCOVERED ALMOST IDENTICAL, ORIGINATING FROM THE JOINTS BETWEEN EACH OF THE 3 SEAT PANELS. THE CRACKS WERE EACH APPROX. 2 INCHES IN LENGTH ON THE FORWARD SIDE OF THE ANGLE.SDR EO02002F00000Fitting · failedCHECK STOCK FOR PART NUMBER AND PERFORMED CEB-1374 ON THE FITTING AND IT FAILED THE INSPECTION IN MFG SB. PART IS SCRAPPED.SDR EOO2002F00004Fitting · unapproved partWHILE READING THE COMPRESSOR FOR SHIPMENT AND REMOVING THE P/C FITTINGS (6850921), TO THAT END, IT WAS DISCOVERED THE UNITS DID NOT PASS THE CEB-1374, AND INSPECTION OF THE BRAZE FILLET. BOTH UNITS WERE REPLACED WITH SERVICEABLE PARTS.SDR CA020430005Sprag Clutch · broken(CAN) UPON THE 300 HOUR INSPECTION OF THE SPRAG ASSEMBLY IT WAS FOUND THAT ONE OF THE SPRAGS WAS BROKEN. THE BREAK WAS AT THE FAR END OF THE SPRAG WHERE THE PROFILE CHANGES.SDR EOO2002F00000Carbon Seal · leakingDURING ANNUAL IT WAS NOTICED THAT THE NR1 CARBON SEAL WAS LEAKING. REMOVED AND SENT IN FOR REPAIR.SDR EOO2002F00001Seat · missingON ANNUAL, FOUND THE ANTI-ICE POPPET SEAT MISSING. THE RETAINING SCREW HAD BACKED OUT. THERE WAS NO EVIDENCE THAT THE SCREW WAS STAKED AS IS REQUIRED.SDR EOO2002F00002Nozzle · crackedDURING ANNUAL INSPECTED THE NR 1 NOZZLE WAS FOUND TO BE BURNED AND CRACKED IN A (T) SHAPE AT THE 12:00 (APPROX) POSITION. THE ODD THING HERE IS ON THE ENGINE AS INSTALLED IN THE HELICOPTER THE NORMAL STARTING POINT FOR THIS KIND OF DAMAGE IS APPROX AT THE 3:0SDR S6G2002F00000Pin · shearedDURING PREFLIGHT, PILOT FOUND NR1 ENGINE OIL COOLER FAN DRIVESHAFT DAMAGED. SHEAR BOLT BETWEEN NR1 ENGINE COUPLING ADAPTER AND DRIVE FAN ADAPTER FAILED ALLOWING DRIVE FAN ADAPTER TO MIGRATE AFT AND DISENGAGE SPLINES OF ENGINE PTO SHAFT. THE OIL COOLER DIRVES
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