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 CA040413004Blade · damaged(CAN) PIN FAILURE, SHEARED AT TOP THREAD OF THREADED SHANK FOR ADJUSTER NUT.SDR CA031118010Liner · loose(CAN) VIBRATION SNAG. STARTER GENERATOR REPLACED. OVERHAUL SHOP FOUND THE STEEL BEARING LINER IN THE DRIVE END ENDBELL HAD BROKEN LOOSE FROM ITS CASTING AND WORE DOWN THE ALUMINUM ENDBELL. THE LINER IS CURLED ON THE OUTSIDE, AND THE ROUGH SURFACE CHEWED THESDR 2003FA0000873Bleed Valve · inoperativeHIGH TOT - BLEED VALVE POPPET BUSHING SLOPPY IN THE HOUSING. REPLACED UNIT.SDR CA030728001Blade · cracked(CAN) ON LANDING PILOT NOTICED DEFECT IN WHITE ROTOR BLADE. BLADE FOUND CRACKED ON UNDERSIDE SKIN FROM TRAILING EDGE TO SPAR 17 INCHES FROM BLADE ROOT. REMAINING BLADES INSPECTED NO DEFECTS FOUND.SDR CA030722004Governor · failed(CAN) PILOT WAS IN CRUISE FLIGHT & SET UP FOR HIS APPROACH FOR LANDING AND THE ENGINE DECELLED BACK TO IDLE.THE ROTOR RPM DECAYED AND HE ENTERED AN AUTOROTATION AND LANDED WITHOUT FURTHER INCEDENT. WHEN ON THE GROUND WE TRIED TO MOVE THE THROTTLE TO FULL OPENSDR CA030730007Bearing Race · spalled(CAN) LT INPUT ROLLER BEARING OUTER RACE SPALLING/PEELING. METAL CONTAMINATION CAUSED EXSTENSIVE DAMAGE TO OTHER INTERNAL TRANSMISSION BEARINGS.SDR CA030724001Solenoid · shorted(CAN) WHEN CARGO HOOK ELECTRICAL RELEASE IS ACTIVATED THE SYSTEM CIRCUIT BREAKER OPENS. FOUND ELECTRICAL SOLENOID INTERNALLY SHORTED.SDR HEEA088081Bleed Valve · malfunctionedBLEED VALVE PRODUCING ENGINE HIGH TOT. SHOP REPAIR.SDR CA030709010Attach Fitting · misinstalled(CAN) EXTERNAL PLATFORM AND COUNTERWEIGHT INSTALLATION MODIFICATION OF STRUT ATTACH FITTING IS DAMAGING UPPER CORNER OF HELICOPTER ROOF STRUCTURE AND THUS REQUIRES INSTALLATION OF NEW HARDWARE PN 95K0300-063 & 95K0300-065.SDR BAQ2003F00001Seal · leakingAFTER 35 HOURS TIME IN SERVICE NR 1 ENG STARTED LEAKING (BEYOND LIMIT). FOUND BOTH FORWARD AND AFT SEALS HAD MISSING INTERSAL CIRCULAR SPRINGS. THIS GEARBOX WAS JUST OVERHAULED, W/O NR LW422398. ALSO FOUND 2ND GEARBOX IN INVENTORY SN: CAG37879, IN SAME CONDSDR AUS20030825Labyrinth Seal · deteriorated(AUS) COMPRESSOR LARGE LABYRINTH SEAL ABRADABLE COATING DEBONDED CAUSING COMPRESSOR LOCKUP.SDR CA030708012Disc Pack · cracked(CAN) SIGNIFICANT FRETTING AT BOLT HOLE/CLAMP UP AREA. TWO DISKS CRACKED AT BOLT HOLE. PART REPLACED. (FORWARD POSITION)SDR CA030618007Spar · cracked(CAN) DURING 100 HR INSPECTION SMOKING RIVETS WERE OBSERVED ON THE BOTTOM CENTER DOUBLER OF THE HORIZONTAL STABILIZER. INVESTIGATION REVEALED SPAR CRACK IN WEB AND LOWER FLANGE. HORIZONTAL STAB WAS REMOVED AND SENT OUT FOR SPAR REPLACEMENT.SDR CA030617001Attach Fitting · cracked(CAN) DURING MAJOR INSPECTION THE TAILBOOM ATTACH FITTING UPPER LT FUSELAGE SIDE WAS FOUND CRACKED AT THE UPPER AFT RIVET HOLE.SDR HEEA087144Bolt · damagedTURBINE WAS REMOVED FOR 1750 HOUR INSPECTION. UPON INSPECTION OF PARTS NOTED FRETTING MUTE ON TIE BOLT. PART SCRAPPED.SDR HEEA087235Fuel Control · damagedMAX STOP ON FUEL CONTROL IS BENT OR CROSS THREADED. SHOP REPAIR.SDR HEEA087518Bleed Valve · malfunctionedENGINE RUNNING HOT. SHOP REPAIR.SDR HEEA087520Case · crackedOUTER COMBUSTION CASE CRACKED. REPLACED CASE.SDR CA031031007Pin · failed(CAN) ON DI FOUND PIN .1250 OF AN INCH ABOVE LEAD/LAG LINK WHILE PREPARING TO INSTALL PIN INTO LEAD/LAG LINK. UPON UNLATCHING OF CLIP OFF BOTTOM PORTION OF PIN, LOWER PORTION OF PIN WAS FOUND SHEARED OFF ABOUT .7500 INCH FROM BOTTOM. REMOVAL OF PIN REVEALED PSDR CA030627005Governor · failed(CAN) WHEN AIRCRAFT APPLIED POWER, GOVERNOR WOULD DROOP BUT WOULD RECOVER WITH A SLIGHT DELAY BUT WHEN AIRCRAFT DESCENDED AND GOVERNOR WOULD OVERSPEED IT WOULD NOT GOVERN AND DECREASE RPM AS WOULD BE NORMAL. TIME SINCE LAST REPAIR 114.8 HRS.SDR HXS2003F00001Blade · crackedMAIN ROTOR BLADE CRACKED ON TOP ROOT FITTING IN THE AREA OF BOLTS IN A CORDWISE DIRECTION FOLLOWING AD 96-10-09(B).SDR CA030605013Bolt · loose(CAN) DURING INSPECTION TO COMPLY WITH AIRCRAFT SERVICES CAMPAIGN NOTICE 351-73-20-12 THE BOLT CONNECTING THE N2 CONTROL CABLES TO THE N2 LEVER ASSEMBLY WAS FOUND TO HAVE A LOW DRAG TORQUE IN THE NUT-PLATE.A NEW BOLT WAS INSTALLED & DRAG TORQUE WAS DETERMINED SDR CA030602005Bolt · 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 TOO THE HYD PACK WAS TOO SHORT, ONLY ONE THREAD WAS SHOWING THROUGH THE ANCHOR NUT. A NEW BOLT WAS INSTALLED AND THE AIRCRAFT WAS RSDR CA030602006Bolt · wrong part(CAN) WHILE COMPLYING WITH FLEET CAMPAIGN NOTICE 351-73-20-12 IT WAS FOUND THAT THE BOLT CONNECTING THE TWO N2 GOVERNOR CABLES TOO THE HYD PACK WAS TOO SHORT, ONLY ONE THREAD WAS SHOWING THROUGH THE ANCHOR NUT. A NEW BOLT WAS INSTALLED AND THE AIRCRAFT WAS RETSDR ERAA087104Engine · making metalENGINE MAKING METAL. FOUND TURBINE MOUNT STUD ON LT SIDE OF GEARBOX LOOSE, MOVING.SDR ALGA086457Shroud · mismanufacturedFOUND PART TO BE MACHINED WRONG. RETURNED PART TO MANUFACTURER. FOR WARRANTY CREDIT.SDR ERAA087096Governor · failedENGINE GETS 100 PERCENT N1 BUT FALLS OFF WHEN PULLING PITCH. DROPS EARLY / OUT OF SERVICE LIMITS. HAS STIFF THROTTLE SHAFT, CORRODED, UNDER SIZE ECCENTRIC SHAFT. REPAIRED AND TESTED IAW HONEWELL OHM FORM 15-1095A.SDR ERAA087097Governor · stiffGOVERNOR HITS MAX STOP WITH MAX BEEP AND UP COLLECTIVE AND ARM VERY STIFF. HEAVY WEAR ON INTERNAL COMPONENTS MAY BE DUE TO EXTERNAL VIBRATION SOURCES. WORK SCOPE CHANGED TO OVERHAUL DUE TO SEVERITY OF WORN COMPONENTS. OVERHAULED IAW HONEYWELL OHM FORM 15-109SDR ERAA087098Bleed Valve · stalledBLEED VALVE PRODUCING COMPRESSOR STALLS. OVERHAULED BLEED VALVE; CHANGED ALL NECESSARY PARTS AS LISTED ON WORK FORM.SDR ERAA087099Combust Chamber · crackedTURBINE HAS LOW POWER. HAS CRACKED ARMPIT ON COMBUSTION CASE. INSTALLED SERVICEABLE COMBUSTION CASE.SDR ERAA087100Engine · making metalENGINE MAKING METAL. FOUND TURBINESDR CA030527003Bulkhead · cracked(CAN) DURING A SCHEDULE INSPECTION, IT WAS REVEALED ON A PREVIOUS REPAIR, WITH LESS THAN 302 HOURS, BULKHEAD AND REPAIRED DOUBLER WERE CRACKED. AS WELL 2 FURTHER CRACKS WERE FOUND APPROXIMATELY 5 INCHES ABOVE INITIAL CRACK IN BULKHEAD. ALL CRACKS DESCRIBED ABOSDR ERAA087095Governor · surgesENGINE SURGES AND OSCILLATES AT HIGH POWER. OIL CONTAMINATION INTERNALLY. REPAIRED AND TESTED IAW HONEY WELL OHM FORM 15-1095ASDR CA030617003Fitting · cracked(CAN) SENT IN FOR OVERHAUL, DUE TO BEARING CHANGE NDT INSPECTION FOUND A 1 INCH CRACK AT BASE OF BEARING LUG TO BASE OF FRAME NEXT TO PIN.SDR CA030528004Seat Track · cracked(CAN) 8 INCH CRACK RUNNING LONGITUDINALLY IN BEND OF ANGLE. TOP FORWARD CORNER OF AFT CABIN SEAT STRUCTURE.SDR CA030527013Drive Gear · disconnected(CAN) THE EXPOXY HOLDING THE SAFETY CLIP IN PLACE CAME UNBONDED, THEREFORE ALLOWING THE CLIP TO MOVE THUS ALLOWING THE DRIVE GEAR TO DISCONNECT FROM THE SHAFT.SDR CA030527009Shaft · sheared(CAN) ONE MINUTE AFTER TAKEOFF DURING A FLIGHT TEST FOR COMPRESSOR STALL, THE NR 2 ENGINE OVER SPEED. THE AIRCRAFT FLEW BACK TO BASE IMMEDIATELY WITH NO FURTHER INCIDENT. THE ENGINE WAS REMOVED FROM THE AIRCRAFT. WHEN THE FCU WAS REMOVED IT WAS NOTICED THAT THSDR CA030502003Bolt · loose(CAN) ON APPROACH, PILOT APPLIED COLLECTIVE PITCH AND NOTICED NR 1 TORQUE SPLIT AWAY FROM NR 2 ENG TORQUE. FURTHER APPLICATION MADE MATTERS WORSE. AFTER LANDING , MAINTENANCE PERSONNEL INVESTIGATED AND FOUND THE BOLT ATTACHING THE N2 LINKAGE TO THE AFT SIDE OSDR ERAA086448Bleed Valve · failedBLEED VALVE / COMPRESSOR STALL : OVERHAULED BLEED VALVE CHANGED NECESSARY PARTS..SDR CA030425009Support · broken(CAN) PILOT HEARD A LOUD BANG AND SUCCESSFULLY LANDED WITHOUT INCIDENT. INVEST REVEALED THAT THE COLLECTIVE SUPPORT BRACKET WAS BROKEN. SUPPORT BRACKET WAS REPLACED WITH A 369N2650 AS PER MM. FURTHER INVEST INTO CAUSE REVEALED THAT PLUNGER IN SLEEVE OF COLLECSDR ERAA086434Governor · malfunctionedGOVERNOR HITS MAX STOP AT FULL BEEP WHEN COLLECTIVE IS UP. DROOPING, OVERSPEEDING EARLY, STIFF THROTTLE. REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15-1095A.SDR ERAA086435Governor · splitDOES NOT KEEP SPEED CAUSING TORQUE SPLIT. OVERHAULED IAW HONEYWELL OHM FORM 15-1095A.SDR ERAA086436Gearbox · making metalGEARBOX MAKING METAL. 2 1/2 BEARING FAILED. OVERHAULED GEARBOX. COMPLIED WITH CEB A-1211 MAG PLUG INSP, CEB-A-1340 REMOVE PINION GEAR, CEB-A-1351, REPLACE OIL TUBE, CEB-1363 NEW DAMPER RING, CEB-A-1372 INSPECT DAMPER RING, AD 2001-24-12 PER CEB-A-1386.SDR 2003FA0000459Nozzle · damagedTURBINE ASSY RECIEVED CUSTOMER REPORTED N1 RUB. INSPECTION REVEALED THE 2ND STAGE NOZZLE DIAPHRAGM TO SEPARATED FROM THE 2ND STAGE NOZZLE DIAPHRAGM TO BE SEPARATED FROM THE NOZZLE ASSEMBLY. BRAZE JOINT FAILED. THIS ALLOW THE NOZZLE TO RUB THE NR 1 AND NR 2 SDR CA030430006Fuel Control · failed(CAN) 1ST START ATTEMPT FAILED TO LIGHT OFF. 2ND START ATTEMPT DELAYED LIGHT OFF. HUNG START AT 50 PERCENT N1, COULD NOT GET ABOVE 98 PERCENT. SHUT DOWN ENGINE - CHANGED FUEL CONTROL UNIT.SDR ERAA086433Nozzle · separatedNR 2 NOZZLE HAS SEPARATION FROM INNER BAND.SDR CA041005003Wire · wrong part(CAN) CASEY HEATER BLOWER MOTOR CIRCUIT BREAKER TRIPPED TWICE DURING THE FIRST 2 HOURS OF USE AFTER MOTOR OVERHAUL. INSPECTION REVEALED THAT THE CASEY HEATER POWER WIRE BETWEEN THE CB SWITCH AND THE CAPACITOR WAS 16 GAUGE. THE CASEY INSTALLATION INSTRUCTIONS CSDR CA030411002Switch · cracked(CAN) FUEL BYPASS SWITCH REMOVED FOR TESTING AND FOUND TO BE UNSERVICEABLE DUE TO ELECTRICAL MALFUNCTION. UPON FURTHER INSPECTION IN COMPONENET SHOP THE END FITTING BASE WAS FOUND TO BE CRACKEDSDR CA030405002Bearing · peeling(CAN) OUTPUT QUILL TAPERED ROLLER BEARING INNER RACE PEELING.SDR CZQ2003F00000Bearing · failedDURING FLIGHT, ENG CHIP LIGHT ACTIVATED. MAGNETIC OIL PLUGS REMOVED AND INSPECTED AND WERE FOUND TO HAVE METAL PARTICLES ATTACHED. ENG WAS REMOVED AND THE GEARBOX REMOVED FROM THE COMPRESSOR AND TURBINE. ENG 1.5 ROLLER BEARING PN 6843362 FAILED. ROLLER CAG
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