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.

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 TJun 11, 2002 · Bell 206B3 · Engine Air Intake SystemSDR ALGA079857Blade · missingUPON INSPECTION OF ALL PARTS NR 2 WHEEL HAD ONE BLADE MISSING.Jun 10, 2002 · N107AL · Bolkms BO105CB* · Turbine SectionSDR 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.Jun 7, 2002 · N133AE · Bolkms BO105S · Turbine Engine Accessory DriveSDR HEEA079883Gear · wornENGINE REMOVED DUE TO RECURRING CHIP LIGHTS. HEAVY STEP WEAR ON GEARTEETH CAUSING PROBLEM IN EXCESS FOR NORMAL WEAR.Jun 7, 2002 · N133AE · Bolkms BO105S · Turbine Engine Accessory DriveSDR ERAA080325Engine · leakingENGINE ASSY LEAKING AT SPLIT LINE. PULLED STUDS ON GEARBOX AND RESET STUDSJun 5, 2002 · N292EH · Bolkms BO105S · Engine (Turbine/Turboprop)SDR HEEA079375Turbine Wheel · crackedTURBINE REMOVED FOR HIGH CYCLED WHEELS. UPON INSPECTION OF PARTS NOTED SULFIDATION AND CRACKED NR 1 WHEEL BLADES. SCRAPPED WHEEL.May 30, 2002 · N8199J · Bolkms BO105S · Turbine SectionSDR CA020530001Spring · broken(CAN) DURING OPERATION 1 ON RT ENGINE, THE SPRING (GOVERNOR LEVER RETURN SPRING) WAS FOUND BROKEN AND REPLACED WITH A NEW SPRING.May 29, 2002 · Bolkms BO105C · Turbine GovernorSDR 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.May 29, 2002 · Bolkms BO105C · Turbine GovernorSDR 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 WMay 29, 2002 · Bolkms BO105C · FastenersSDR CA020708007Support · mismanufactured(CAN) SUPPORT FOUND TO HAVE MACHINING MARK ABOVE BASE OF SUPPORT. THISSUPPORT WAS NEW CONDITION AND HAD NOT BEEN PLACED IN SERVICE.May 24, 2002 · Bell 206B · Main Rotor Mast/SwashplateSDR HEEA079286Bleed Valve · failedFAILED BLEED VALVE ALLOWING ENGINE TO PRODUCE HIGH TOT.May 23, 2002 · N8199J · Bolkms BO105S · Compressor Bleed ValveSDR 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 THMay 23, 2002 · N69PF · Hughes 369D · Main Rotor GearboxSDR 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 TUMay 15, 2002 · Turbine SectionSDR 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)May 8, 2002 · Hughes 369D · Main Rotor BladesSDR 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.May 2, 2002 · N153EH · Bolkms BO105S · Turbine GovernorSDR 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 TORSIONMay 2, 2002 · N135EH · Bolkms BO105A · Turbine GovernorSDR 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 PUMPApr 26, 2002 · N5074R · Hughes 369D · Fuel Boost PumpSDR LS1R088282Pump · inoperativeFUEL PUMP INOPERATIVE.Apr 26, 2002 · N8330P · Hughes 369E · Engine Fuel PumpSDR 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 CONTApr 25, 2002 · Turbine Engine Compressor SectionSDR 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.Apr 24, 2002 · Hughes 369D · Main Rotor HeadSDR 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.Apr 24, 2002 · Bell 206B · Fuel Boost PumpSDR LS1R088288Nozzle · failedNOZZLE FLAMES OUT AT 20 PERCENT N1.Apr 23, 2002 · N9907K · Bell 206B3 · Fuel Injector NozzleSDR 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.Apr 20, 2002 · Hughes 369D · Tail Rotor GearboxSDR AUS20020438Filter · blocked(AUS) HYDRAULIC FILTER BLOCKED. DIFFERENTIAL PRESSURE INDICATOR BUTTON INOPERATIVE.Apr 18, 2002 · Bell 206B3 · Hydraulic Filter, MainSDR 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 REPLACApr 10, 2002 · Bell 206B · Turbine GovernorSDR 2002FA0000491Bearing · wornBOTH MAGNETO DRIVE BEARINGS WERE LOOSE, REMOVED AND FOUND BOTH BEARINGS WORN AND ROUGH.Apr 8, 2002 · N675M · Bell 206B · Magneto/DistributorSDR 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 REPApr 4, 2002 · N130EH · Bolkms BO105S · Turbine Engine Reduction GearSDR 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.Apr 4, 2002 · N127EH · Bolkms BO105S · Turbine SectionSDR CA020425001Exciter · failed(CAN) NO LIGHT OFF DUE TO FAULTY PART. CAN CAUSE A REAL PROBLEM IN REMOTE AREA.Apr 4, 2002 · Bolkms BO105C · ExciterSDR 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.Apr 3, 2002 · Fuel Controlling SystemSDR 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.Apr 3, 2002 · N291EH · Bolkms BO105A · Fuel Controlling SystemSDR 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.Apr 3, 2002 · Fuel Controlling SystemSDR 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.Apr 2, 2002 · Bell 206L · Turbine Engine Combustion SectionSDR 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.Apr 1, 2002 · Bolkms BO105CBS · Main Rotor GearboxSDR HEF2002F00000Sleeve · erraticSLEEVE BROKEN AT GLUE JOINT. CAUSED ERRATIC FUEL CONTROL.Mar 27, 2002 · N911RP · Hughes 369E · Fuel Control/Turbine EnginesSDR 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 Mar 23, 2002 · Bell 206B · Rotorcraft Tail BoomSDR 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.Mar 22, 2002 · N5074R · Hughes 369D · Compressor Bleed ValveSDR 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 THMar 20, 2002 · Hughes 369D · Turbine Engine Compressor SectionSDR 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 HOLEMar 18, 2002 · Hughes 369D · Tail Rotor Control SystemSDR 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.Mar 15, 2002 · Bolkms BO105S · Main Rotor ControlSDR 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 Mar 6, 2002 · Bolkms BO105S · Tail Rotor Control SystemSDR 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 EMar 5, 2002 · Bell 206B · Aircraft Fuel Filter/StrainerSDR 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.Feb 27, 2002 · Bell 206B · Passenger Compartment EquipmentSDR EO02002F00000Fitting · failedCHECK STOCK FOR PART NUMBER AND PERFORMED CEB-1374 ON THE FITTING AND IT FAILED THE INSPECTION IN MFG SB. PART IS SCRAPPED.Feb 25, 2002 · Bell 206B · Turbine Engine Compressor SectionSDR 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.Feb 25, 2002 · Hughes 369D · Turbine Engine Compressor SectionSDR 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.Feb 22, 2002 · Hughes 369D · Engine/Transmission CouplingSDR EOO2002F00000Carbon Seal · leakingDURING ANNUAL IT WAS NOTICED THAT THE NR1 CARBON SEAL WAS LEAKING. REMOVED AND SENT IN FOR REPAIR.Feb 19, 2002 · Hughes 369D · Turbine Engine Compressor SectionSDR 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.Feb 19, 2002 · Hughes 369D · Engine Bleed Air SystemSDR 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 3:0Feb 19, 2002 · Hughes 369D · Turbine SectionSDR 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 DIRVESFeb 13, 2002 · N80NM · Agusta A109A2 · Engine Oil Cooler
Back to Allison 250-C20B