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 97ZZZX1323Pinion Gear · wornINTERNAL SPLINES WORN OR AT LEAST BEYOND MAXIMUM LIMITS. NO WEAR STEP. BOTH BEARINGS JOURNALS .0002 INCH BELOW MINIMUM DIAMETER.Mar 21, 1997 · Turbine Engine Reduction GearSDR HAIHEEA9220Gearbox Cover · defectiveGEARBOX DISASSEMBLED DUE TO AFT T/M LEAK ON TEST CELL. DISASSEMBLY INSPECTION REVEALED: AFT BUSHING HEIGHTH EXCEEDS PRINT DIMENSION ON GEARBOX COVER. INSTALLED A DALLAS AIRMOTIVE REPAIRED GEARBOX COVER. TIME SINCE REPAIR 0:00.Mar 19, 1997 · Turbine Engine Accessory DriveSDR 97ZZZX1682Damper Ring · crackedFOUND DAMPER RING CRACKED AND A SMALL CHIP MISSING ON THE OUTSIDE DIAMETER OF THE RING. THIS DEFECT BEING ON THE GEAR SIDE OF THE RING, FITS ALL THE WAY IN THE GROOVE, AND WAS ONLY FOUND AFTER REMOVAL. CRACK WAS 2 INCHES FROM THE END OF THE RING.Mar 18, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1786Gear · teeth pittedFOUND PTTING AND NICKS ON TEETH OF AIR OIL SEPARATOR GEAR.Mar 18, 1997 · N8639F · Hughes 369D · Turbine Engine Accessory DriveSDR HAIHEEA9214Nozzle · defectiveENGINE REMOVED DUE TO TURBINE OVERHAUL. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. DISASSEMBLY INSPECTION REVEALED: MATERIAL FLAKING AND MISSING ON #2 NOZZLE #2 TIP PATH. INSTALLED A DALLAS AIRMOTIVE OVERHAULED #2 NOZZLE.Mar 18, 1997 · Turbine SectionSDR HAIHEEA9215Nozzle · crackedTURBINE REMOVED DUE TO OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED; CRACKED BEYOND LIMITS ON #1 NOZZLE VANES. INSTALLED A NEW #1 NOZZLE.Mar 18, 1997 · N2272V · Bell 206B3 · Turbine SectionSDR HAIHEEA9218Nozzle · crackedENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON TURBINE DISASSEMBLY NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON #1 NOZZLE VANES AND OUTER BAND. INSTALLED NEW #1 NOZZLE.Mar 18, 1997 · N4302G · Bolkms BO105S · Turbine SectionSDR HAIHEEA9219Nozzle · crackedENGINE REMOVED TO COMPLY WITH TURBINE 1750 HOUR INSPECTION. UPON INSPECTION OF TURBINE PARTS NOTED: BURNT AND CRACKED BEYOND SERVICEABLE LIMITS ON #1 NOZZLE VANES AND CRACKED OUTER BAND. INSTALLED NEW #1 NOZZLE.Mar 18, 1997 · N81992 · Bolkms BO105S · Turbine SectionSDR 97ZZZX1409Pto Gear Spline · wornDURING INSPECTION OF GEARBOX GEARS, FOUND THE PTO GEAR INTERNAL DRIVE SPLINES WORN BEYOND LIMITS.Mar 17, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1410Spur Gear · spalledDURING INSPECTION OF GEARBOX GEARS, THE TEETH WERE FOUND SPALLED.Mar 17, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1411Spur Gear · spalledINSPECTION FOUND GEAR TEETH SPALLED.Mar 17, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1412Gearshaft · wornINSPECTION FOUND TACHOMETER DRIVE WORN BEYOND LIMITS.Mar 17, 1997 · N8639F · Hughes 369D · Turbine Engine Accessory DriveSDR 97ZZZX1413Gear · wornDURING INSPECTION OF GEARBOX GEARS, FOUND THE TORQUE METER GEAR DAMPER RING GROOVE WORN BEYOND LIMITS.Mar 17, 1997 · N8639F · Hughes 369D · Turbine Engine Accessory DriveSDR 97ZZZX1256Gearshaft · wornTACHOMETER DRIVE END WORN ABOUT .040 INCH.Mar 12, 1997 · Turbine Engine Accessory DriveSDR NYBA973Wheel · crackedFIRST STAGE WHEEL IS CRACKED.Mar 9, 1997 · N121NH · Bell 206L · Turbine SectionSDR NYBA975Engine Assy · defectiveENGINE IS DEFECTIVE. REPLACED N1 SECTIONMar 9, 1997 · N122NH · Bell 206L · Turbine Engine Compressor SectionSDR 97ZZZX1118Turbine · smoking19.4 HOURS AFTER A REPAIR TO THE TURBINE PT SUPPORT, THE TURBINE STARTED SMOKING HEAVILY ON SHUT DOWN. AFTER THE ENGINE COOLED, A VISUAL INSPECTION FOUND OIL PUDDLING IN THE TURBINE EXHAUST COLLECTOR. UNIT SENT BACK FOR REPAIR.Mar 7, 1997 · N5074R · Hughes 369D · Turbine SectionSDR 97ZZZX1134Gearshaft · wornTACH DRIVE END WORN ABOUT .040 INCH. SUBMITTER STATED FOUND ABOUT 50 PERCENT OF ALL THE GEARS ARE FOUND WORN WHEN INSPECTED.Mar 5, 1997 · Turbine Engine Accessory DriveSDR NYBA972Turbine Assy · burnedTURBINE ASSY IS BURNED. REPLACEDMar 5, 1997 · N83086 · Bell 206B · Turbine SectionSDR AU970491Nozzle · worn(AUS) NO6 AND NO7 BEARING OIL NOZZLE WORN AND CORRODEDMar 4, 1997 · Turbine Engine Oil SystemSDR 97ZZZX1092Case · liner looseCOMPRESSOR CASE PLASTIC LINER CAME LOOSE IN THE BLEED VALVE AIR FLOW BAND OF COMPRESSOR CASE. ONE PIECE APPROXIMATELY 2 SQUARE INCHES IN SIZE LODGED IN BLEED VALVE.Mar 3, 1997 · N18FH · Bell 206B · Turbine Engine Compressor SectionSDR 97ZZZX1140Oil Tube · too shortINSPECTED OIL TUBE PER CEB1307 AND IS TOO SHORT PER REQUIREMENTS OF THE BULLETIN. PART WAS REPLACED.Feb 26, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR AU970492Clamp · broken(AUS) ENGINE EXHAUST PIPE CLAMP BROKEN AT RIVET LINEFeb 26, 1997 · Engine Collector/Tailpipe/NozzleSDR HEEA979151Housing · below specsGEAR BOX HOUSING RECEIVING INSPECTION REVEALED: MEASURED .0025 BELOW SPECS (3.8490 MIN) ON GEARBOX HOUSING COMPRESSOR MOUNT STUD AS MARKED.Feb 26, 1997 · Turbine Engine Accessory DriveSDR HEEA979152Nozzle · crackedENGINE REMOVED DUE TO AFT T/M BORE OIL LEAK. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED AND BOWED BEYOND SERVICEABLE LIMITS ON #1 NOZZLE VANES. INSTALLED A NEW #1 NOZZLE.Feb 26, 1997 · N7136H · Bolkms BO105S · Turbine SectionSDR CA970311077Bushing · worn(CAN) FUEL CONTROL UNIT POINTER BUSHING WAS FOUND TO BE EXCESSIVLEY WORN.Feb 26, 1997 · Hughes 369D · Fuel Control/Reciprocating EnginesSDR 97ZZZX1139Nozzle · gougedDURING DISASSEMBLY OF ENGINE GEARBOX, NR 4 BEARING WAS FOUND NOT TO BE SEATED ALL THE WAY ON THE JOURNAL ON THE HELICAL GEAR DUE TO IMPROPER INSTALLATION. SUBSEQUENT INSPECTION FOUND THE 6875776 OIL NOZZLE GOUGED ON THE BOTTOM FLANGE BY THE BEARING. REPLACEDFeb 25, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1186Bearing · pittedDURING INSPECTION OF ENGINE GEARBOX, BEARING WAS FOUND TO BE PITTED ON SEVE RAL ROLLERS.Feb 25, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR 97ZZZX1187Picollo Tube · burrsINSPECTED PICOLLO TUBE PER CEB 1177 (S/N BN16959) AND FOUND BURRS - SCRAPPED PER CEB.Feb 25, 1997 · N8639F · Hughes 369D · Turbine Engine Reduction GearSDR HEEA979127Tube Assy. · defectiveENGINE REMOVED DUE TO LOW OIL PRESSURE. UPON INSPECTION OF GEARBOX PARTS NOTED THE FOLLOWING: TUBE ASSEMBLY DIMENSIONAL CHECK PER CEB1307. INSTALLED ANOTHER TUBE.Feb 21, 1997 · N2275Q · Bell 206B3 · Turbine Engine Accessory DriveSDR HEEA979138Wheel · defectiveTURBINE REMOVED DUE TO METAL IN OIL AND HIGH CYCLED #1 AND #2 WHEELS. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: MINOR SULFIDATION ON 75% OF TRAILING EDGE OF WHEEL. SCRAPPED #1 WHEEL.Feb 21, 1997 · N81992 · Bolkms BO105S · Turbine SectionSDR AU970120Blade · cracked(AUS) TAIL ROTOR BLADE SKIN CRACKED IN AREA INBOARD OF THE LEADING EDGE PROTECTION STRIP RUNNING CHORDWISE FROM THE LEADING EDGE TOWARDS THE TRAILING EDGE - CRACK LENGTH APPROXIMATELY 25.4MM (1IN)Feb 19, 1997 · Hughes 369HS · Tail Rotor BladesSDR AU970163Blade · cracked(AUS) TAIL ROTOR BLADE SKIN CRACKED IN AREA JUST INBOARD OF THE LEADING EDGE PROTECTIVE STRIP RUNNING CHORDWISE TOWARDS THE TRAILING EDGE - CRACK LENGTH APPROXIMATELY 25.4MM (1IN)Feb 19, 1997 · Hughes 369HS · Tail Rotor BladesSDR 97ZZZX1384Bellows Seal · leakingCARBON BELLOWS SEAL LEAKING AFTER ONLY 23.5 HOURS.Feb 17, 1997 · Turbine SectionSDR CA970304001Cylinder Support · cracked(CAN) DURING 100 HOUR INSPECTION OF THE UPPER DECK FLIGHT CONTROLS, A CRACK WAS FOUND IN THE FORWARD R/H WEB ON THE TOP EDGE.Feb 14, 1997 · Bell 206B · Rotorcraft Flight ControlSDR HEEA979119Blades · damagedRECEIVING INSPECTION REVEALED: MINOR F.O.D. AND CORROSION PITS ON #1 COMPRESSOR WHEEL BLADES. PHI REQUESTING 100% WARRANTY REPAIR. PART OVERHAULED ON DALLAS AIRMOTIVE W/O# LF1015.Feb 14, 1997 · Turbine Engine Compressor SectionSDR 97ZZZX957Turbine · nozzle damageGROUND PERSONNEL NOTICED NOISE COMING FROM ENGINE DURING START-UP AND SHUT DOWN BETWEEN 20 PERCENT AND 60 PERCENT N1 RPM. THE ENGINE RAN NORMAL AT GROUND IDLE. UPON DISASSEMBLY OF THE ENGINE, THE CAUSE OF THE NOISE WAS FOUND TO BE EXCESSIVE HEAT DAMAGE TO THFeb 11, 1997 · N40AP · Hughes 369D · Turbine SectionSDR 97ZZZX921Actuator · defectiveDURING RUN-UP IT WAS DISCOVERED THE GOV NEEDED CONSTANT ADJUSTMENT UP AND DOWN WITH THE TRIM MOTOR. IT WAS FOUND THAT THE TRIM MOTOR HAS SOME INTERNAL SLOP. REPLACED TRIM MOTOR.Feb 10, 1997 · N5074R · Hughes 369D · Turbine GovernorSDR 97ZZZX922Line · chafedDURING RE-ASSEMBLY OF THE ENGINE, IT WAS FOUND THAT THE FUEL LINE FROM FCU TO THE CHECK VALVE WAS CONTACTING ANOTHER LINE. NORMALLY, THIS INDICATES IT IS INSTALLED BACKWARDS, BUT IN THIS CASE, IT HIT BOTH WAYS. NO PART NUMBER WAS FOUND ON THE TUBE, AND A NEWFeb 10, 1997 · N5074R · Hughes 369D · Engine Fuel DistributionSDR CA970227006Hydraulic Pump · sheared(CAN) HYDRAULIC PUMP DRIVE SHAFT SHEARED AT A POINT JUST BEFORE THE SPLINE AREA.Feb 8, 1997 · Bell 206B · Hydraulic Pump (Electric/Engine), MainSDR CA970421055Clutch · loose ring(CAN) WHILE PURGING THE BEARING ON THE OVER RUNNING CLUTCH, THE RING SECURING THE REAR BEARING CAP POPPED OFF. THE RING WAS REPLACED, BUT CAME OFF AGAIN AS GREASE WAS PURGED. PART TC: 228.Feb 6, 1997 · Hughes 369D · Engine/Transmission CouplingSDR CA980126001Governor · failed(CAN) UNABLE TO HOLD STEADY N2 RPM, SURGING OVER/UNDER SPEED.Feb 1, 1997 · Hughes 369D · Turbine GovernorSDR CA970311085Hose Assy · corroded(CAN) HOSE ASSEMBLY HAS CORROSION AT THE END FITTING.Jan 31, 1997 · Bell 206L · Powerplant SystemSDR CA970311087Support · corroded(CAN) EXTENSIVE CORROSION OF SUPPORT.Jan 31, 1997 · Bell 206L · Fuselage Main, StructureSDR CA970311088Support · cracked(CAN) CRACKS ON BOTH SIDES OF CASTING.Jan 31, 1997 · Bell 206L · Fuselage Miscellaneous StructureSDR CA970311086Combustion Liner · damaged(CAN) MECHANICAL DAMAGE FROM SCAVANGE HOSE USED IN CASEY HEATER. THE WIRE BRAIDING HAD WORN A DEEP GROOVE IN OUTER CAN WHICH REQUIRES A PATCH REPAIR.Jan 31, 1997 · Bell 206L · Heating SystemSDR CA970210002Blade · delamination(CAN) BUBBLE DELAMINATION ON LOWER SURFACE OF ABRASION STRIP - APPROXIMATELY 1/2" X 2" LONG EXTENDING WITHIN 3/8" OF THE TRAILING EDGE.Jan 27, 1997 · Hughes 369D · Main Rotor BladesSDR CA970225003Pitch Link Assy · cracked(CAN) 2 CRACKS FOUND ON LOWER END OF PITCH LINK TUBE. 1 APPROXIMATELY 3/8" AND 1 APPROXIMATELY 1/2".Jan 23, 1997 · Bell 206L · Main Rotor HeadSDR 97ZZZX579Pt Shaft · chippedENGINE REJECTED DUE TO N2 SPLINE CHIPPED SHAFT. THE FRONT END OF THE SPLINE WAS CHIPPED. SUBMITTER BELIEVES THIS IS CAUSED AT INSTALLATION OF TURBINE GEARBOX.Jan 22, 1997 · Turbine SectionSDR HEEA978922Tube Assy. · defectiveENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF GEARBOX PARTS NOTED THE FOLLOWING: TUBE ASSEMBLY FAILED DIMENSIONAL CHECK PER CEB1307. INSTALLED A NEW TUBE.Jan 21, 1997 · Turbine Engine Accessory Drive
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