Allison 250-C47B
Service difficulty reports · 1,403
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 = '250C47B' 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 = '250C47B' 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 HEER119357Support · cracked3.5 INCH CRACK IN RADIUS RT SIDE ABOVE LANDING GEAR SUPPORT. REPLACED WITH SERVICEABLE SUPPORT.SDR CA080325013Shaft · cracked(CAN) ENGINE NOISE WAS NOTED AT GROUND IDLE. THE NOISE WAS REDUCED WHEN IN HOVER BUT CONSISTENTLY APPEARED DURING SPOOL DOWN TO GROUND IDLE. THE ENGINE WAS REMOVED AND RETURNED TO THE OVERHAULER FOR REPAIR. THE NOISE WAS CONFIRMED DURING AN ENGINE TEST WITH VISDR CA080229010Scroll · cracked(CAN) COMPRESSOR 390.6 SINCE 2000 HOUR INSP. CRACK LOCATED BY ENGINEER DURING GROUND RUN UP FOLLOWING SCHEDULED INSP. LOCATED BY AIR LEAK FOUND BY BARE HAND CHECK. CRACK LOCATED SLIGHTLY BELOW SCROLL ARMPIT REINFORCEMENT PATCH AREA, NOT IN NORMAL CRACK LOCATISDR CA080221005Fitting · cracked(CAN) LOWER LT TAILBOOM ATTACH FITTING FOUND CRACKED IN WEB AREA ON SCHEDULED INSPECTION. POSSIBLE ALIGNMENT ISSUES FROM THE MFG. REPLACED WITH UPGRADED ONE PIECE FITTING AND LONGERON. (TC NR 20080221005)SDR CA080229008Engine · vibration(CAN) EXCESSIVE ENGINE NOISE AND HIGH VIBRATION FELT BY PILOT AT GROUND IDLE. VERFIED BY ENGINEER. COMPLETE ENGINE REMOVED AND SENT FOR INVESTIGATION. WILL FWD REPORT WHEN AVAILABLE. (TC NR 20080229008)SDR 2008FA0000099Scroll · brokenCOMPRESSOR (PN 23065593 SN CAC45245) WAS RECEIVED INTO THE SHOP FOR REMOVAL AND REPLACEMENT OF THE SCROLL (PN 23074076(B) SN 40353) FOR A VISIBLE OPEN HOLE OR BROKEN OFF HEX EXTERNAL BOSS LOCATING PIN AT THE TURNING VANE LOCATION ON THE SCROLL. THE OPERATOR CSDR CA080128007Servo · noisy(CAN) WORN LINKAGE AND PILOT VALVE CAUSED SERVO TO MAKE LOUD GROWLING NOISE. THIS WAS AN INTERMITTENT PROBLEM THAT COULD BE INDUCED BY CERTAIN CONTOL INPUTS. THE SOUND WAS FINALLY DETERMINED TO BE COMING FROM THE RT SERVO AND IT WAS REPLACED. THERE WERE NO CONSDR CA080129003Nut · undertorqued(CAN) DURING 100 HR, LUBRICATION OF T/R HANGER BEARINGS, IT WAS NOTED THAT THE AFT HEAT SHIELD WAS FREE TO ROTATE, UP ON FURTHER INSPECTION IT WAS FOUND THAT THE AFT SPANNER NUT WAS LOOSE, BUT THE LOCK WASHER WAS STILL IN THE LOCK POSITION. RECORDS SHOW THAT TSDR CA080116019Impeller · saturated(CAN) AFTER UNEVENTFUL AND NORMAL SHUTDOWN, PILOT NOTICED A POOL OF OIL UNDER THE AC AND OIL ALL OVER THE ENGINE COWLS AS WELL AS SOAKING THE IB .2500 OF THE MAIN ROTOR BLADES. THERE WERE NO OIL TEMP OR PRESSURE CAUTION WARNINGS OR ENGINE CHIP LIGHT INDICATIONSDR HEER118527Support · crackedFOUND BOTH LT AND RT SUPPORT CRACKED IN RADIUS AT 7TH SCREW IB ATTACHMENT. BOTH ANGLES CRACKED IN IDENTICAL AREA. REMOVED AND REPLACED BOTH SUPPORT ANGLES.SDR HEER118528Support · crackedFOUND BOTH LT AND RT SUPPORT CRACKED IN RADIUS AT 7TH SCREW IB ATTACHMENT. BOTH ANGLES CRACKED IN IDENTICAL AREA. REMOVED AND REPLACED BOTH SUPPORT ANGLES.SDR AWTR118188Blade · crackedBLADE LEADING EDGE CAP CRACKED.SDR HEER117772Alternator · failedENGINE WAS REMOVED DUE TO METAL IN OIL. UPON DISASSEMBLY FOUND METAL UNDER PERMANENT MAGNET ALTERNATOR. APPEARS TO BE BEARING FAILURE IN PERMANENT MAGNET ALTERNATOR. PART WILL BE SENT TO VENDOR FOR POSSIBLE REPAIR.SDR 2007FA0000881Pinion Gear · fracturedRECEIVED THE ENGINE FOR REPAIR DUE TO VIBRATIONS, AND METAL IN OIL. UPON DISASSEMBLY OF THE GEARBOX FOUND THE ROLLER RETAINER OF THE NR 3 BEARING FRACTURED IN (4) PLACES. ALSO FOUND THAT THE NR 1 TURBINE WHEEL BLADE TIPS HAD BEEN RUBBING THE BLADE TRACK WHICSDR YTRR117247Balance Weight · missingIN CRUISE FLIGHT THE PILOT EXPERINCED A SEVERE VIBRATION IN THE TAIL ROTOR. UPON RETURN TO BASE, IT WAS DISCOVERED THAT THE TAIL ROTOR BLADE HAD A TIP WEIGHT MISSING. THE TAIL ROTOR BLADE HAD BEEN REPAIRED IN JUNE 2007 AND HAD ACCUMULATED APPROXIMATELY 205.8 SDR 2007FA0000855Fadec · failedAIRCRAFT WAS STARTED IN A NORMAL MANNER. JUST PRIOR TO LIFT OFF THE (FADEC FAIL), (AUTO RELIGHT) WARNING LIGHTS ILLUMINATED AND THE FADEC FAIL HORN SOUNDED. NO LIMITATIONS WERE RECORDED OR OBSERVED. THE FADEC CONTROL ASSY WAS RETURNED TO MFG FOR ANALYSIS. SDR HEEA116969Transducer · failed10 MINUTES OUT, THE ENGINE OIL PRESSURE DROPPED TO ZERO, NO TORQUE FLUCTUATION, TEMP STABLE, NO CAUTION LIGHTS. LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE ENGINE OIL PRESSURE TRANSDUCER PN 222-375-077-113, SN 6073-3A-70 AND THE ENGINE OIL TEMP-PRESS ISDR HEEA116968Turbine Wheel · failedAPPROXIMATELY 5 MINUTES AFTER TAKEOFF, THE ENGINE FAILED AND AUTOROTATION WAS COMPLETED TO THE WATER. ENGINE WAS REMOVED DUE TO ENGINE SHUTDOWN. SUSPECT 3RD STAGE WHEEL FAILURE, 3RD STAGE WHEEL FOUND WITH ALL BLADES FRACTURED AT ROOT. TURBINE WAS SHIPPED TOSDR BAQA200700026Blade · failedAIRCRAFT DEVELOPED VIBRATION IN CRUISE FLIGHT UPON LANDING DISCOVERED TIP WEIGHT MISSING FROM TAIL ROTOR BLADE.SDR CA070604001Gearbox · seized(CAN) ENGINE CHIP ILLUMINATED, APPROX 3-4 SECONDS LATER ENGINE FAILED. (TC NR 20070604001)SDR CA070522004Bearing · separated(CAN) COMPLETE FAILURE/SEPARATION OF SHEAR BEARING ELASTOMERIC LAMINATIONS (4 OF 4). FOUND AT INSPECTION. SHEAR BEARING P/N 407-310-100-115. S/N 8345, 8325, 8109, 8113. (TC NR 20070522004)SDR CA070604002Fadec · malfunctioned(CAN) DURING A FLIGHT ON MAY 18 AT 6755.9 TAT, THE PILOT EXPERIENCED A CONTROLLED ENGINE OVERSPEED CONDITION. THE PILOT WAS NOT GIVEN AT INDICATION IAW MFG FM CRITERIA. LATER THE PILOT REPORTED THE CONDITION TO THE AME. THE AME DOWN LOADED THE FADEC INFORMATSDR CA070511006Blade · cracked(CAN) TAIL ROTOR BLADE WAS FOUND CRACKED AT THE TIP BLOCK. (TC NR 20070511006)SDR CA070511007Spring · broken(CAN) 2 SPRINGS WERE FOUND BROKEN. (TC NR 20070511007)SDR CA070427005Spring · broken(CAN) UPON SCHEDULED INSPECTION IT WAS NOTICED THAT ONE OF THE EIGHT SPRINGS IN THE MAIN ROTOR FRAME ASSEMBLY WAS BROKEN. (TC NR 20070427005)SDR 53445041507Fuel Cap · not seatedDEPARTED, 30 MILES AWAY ON A HEADING OF 080. (4) MINUTES INTO THE FLIGHT, MED CREW INFORMED ME THERE WAS THE STRONG SMELL OF JET FUEL IN THE AIRCRAFT. CHECKED THE FUEL AND PRESSURE GAUGES AND COULDN'T SMELL ANY FUMES EITHER. LOOKED FOR A SUITABLE LZ AND WHILESDR BAQA2006009Turbine Blades · damagedLOUD BANG ACCOMPANIED WITH A YAW AND ENGINE CHIP LIGHT. AIRCRAFT LANDED AND FOUND ENGINE TURBINE BLADES PENETRATED THE CASE.SDR HEEA113076Transmission · making metalMETAL, THE CHIP LIGHT WAS CAUSED BY SLIVER OF METAL CREATED WHEN MFG INSTALLED BEARING 406-040-037-103 INTO THE LOWER MAST HOUSING 407-040-054-101. REPLACED TRANSMISSION. REQUESTS FOR WARRANTY CREDIT FOR PARTS AND LABOR DUE TO METAL SLIVER BEING CREATED DURSDR YTRR112888Support · crackedON START THE PILOT NOTICED AND SMELLED OILY SMOKE IN CABIN. WHEN THE HEATER WAS TURNED OFF THE SMOKE DISAPATED. THE AIRCRAFT WAS SHUTDOWN. ON INSPECTION FOUND A CRACKED FRONT SUPPORT ON THE COMPRESSOR THAT WAS ALLOWING OIL INTO THE BLEED AIR HEATER. REMOVED ASDR CA061103017Combustion Liner · cracked(CAN) COMBUSTION LINER FOUND CRACKED ON REMOVAL DURING TURBINE SECTION REPLACEMENT TO COMPLY WITH ROLLS ROYCE CEB A-72-6060. THIS PART IS FOUND TO BE CRACKED ANY TIME IT IS REMOVED AFTER ANY LENGTH OF TIME IN SERVICE. MANUFACTURERS MAINTENANCE MANUAL ALLOWS NOSDR CA061103018Combustion Case · cracked(CAN) CRACK ALONG LEFT SIDE "ARMPIT" WELD LINE FOUND DURING UNSCHEDULED TURBINE REMOVAL FOR CEB A-72-6060. NO CRACKS ALLOWED IN THIS AREA.SDR YTRR111853Gearbox · making metalDURING CRUISE FLIGHT, ENGINE CHIP LIGHT ILLUMINATED ACCOMPANIED BY HOWLING SOUND FROM ENGINE AREA. ONE MINUTE LATER, FADEC SYSTEM FAILED. PILOT AUTOROTATED INTO WATER.SDR CA061018002Blade · damaged(CAN) UPON POST FLIGHT INSPECTION, A TEAR AND PROTRUTION OF THE LOWER SKIN, JUST AFT OF THE LEADING EDGE OUTBOARD ERROSION STRIP WAS DISCOVERED APPROXIMATELY 4 INCHES INBOARD FROM THE TIP OF THE BLADE AT STATION 206. (TC# 20061018002)SDR HEEA111425Seal · leakingPILOT REPORTED ENGINE OIL PRESSURE FLUCTUATING IN CRUISE FLIGHT. ENGINE OIL RESERVOIR CONTAINED ONLY ONE INCH OF OIL WHEN CHECKED. OIL LEVEL IN RESERVOIR HAD BEEN AT NORMAL OPERATING LEVEL ON PREFLIGHT. MAINTENANCE FOUND THE NR 1 BEARING SEAL LEAKING. REPLSDR CA060818003Skin · cracked(CAN) DURING SCHEDULED 150 HOUR TAILBOOM INSPECTION A CRACK MEASURING .7500 OF AN INCH LONG WAS DISCOVERED ON THE UPPER LT SIDE OF THE TAILBOOM AT STATION 98.89. AIRCRAFT WAS GROUNDED AND A NEW TAILBOOM WAS ORDERED (200 SERIES). (TC NR 20060818003)SDR CA060712001Bearing · separated(CAN) AIRCRAFT DEVELOPED A VERTICIAL VIBRATION, VISUAL INSPECTION REVEALED A SEPERATED SHEAR BEARING. (TC NR 20060712001)SDR ALG2006F00034Windshield · bird strikeIN FLIGHT, PILOTS SIDE WINDSHIELD CRACKED DUE TO BIRD STRIKE. MAINTENANCE REMOVED AND REPLACED WINDSHIELD AND INSPECTED AC FOR FURTHER DAMAGE. NO OTHER DEFECTS NOTED. (K)SDR ALG2006F00032Starter Gen · failedIN CRUISE FLIGHT, GENERATOR FAILED (CAUTION LIGHT ILLUMINATED). WOULD NOT RESET. AIRCRAFT LANDED AT MULTI-SHIP PLATFORM AS SOON AS PRACTICAL. CALLED MAINTENANCE. (K)SDR ALG2006F00028Chip Detector · dirtyUPON TAKEOFF TO HOVER, XMSN CHIP LIGHT ILLUMINATED UPON TAKEOFF TO HOVER. PILOT LANDED AC. MAINTENANCE FOUND LIGHT FUZZ ON LOWER XMSN CHIP PLUG. CLEANED CHIP PLUG, C/W 30 MIN GROUND RUN. NO FURTHER DEFECTS NOTED. (K)SDR ALG2006F00011Pitch Link · looseIN FLIGHT, TAIL ROTOR PRODUCED A VIBRATING NOISE. TIGHTEN T/R PC LINK CAP NUT ONE FLAT. INSPECTED SYSTEM AND CHECKED WITH VIBRATION GEAR. EVERYTHING CHECKED OK. ALL WORK IAW MM. (K)SDR CA060123003Turbine Wheel · damaged(CAN) PILOT HEARD LOUD SQUEALING NOISE FOLLOWED BY VIBRATION WHILE IN CRUISE FLIGHT WITH PASSENGERS. ELECTED TO LAND IMMEDIATELY. NORMAL LANDING AWAY FROM BASE CARRIED OUT. INSPECTION FOUND DAMAGE TO ENGINE TURBINE SECTION, SUSPECT 3RD STAGE TURBINE WHEEL PROBSDR ALG2006F00018Pump · inoperativeDURING FLIGHT THE RIGHT FUEL BOOST PUMP LIGHT ILLUMINATED. REMOVED AND REPLACED THE RT FUEL BOOST PUMP. OPERATIONAL CHECK WAS GOOD. (K)SDR ALG2006F00022Pump · unserviceableDURING HOVER, HIGH FREQUENCY BUZZ WAS FELT IN TAIL ROTOR PEDALS. REMOVED AND REPLACED HYDRAULIC PUMP WITH SERVICEABLE UNIT. OPERATIONAL CHECK WAS GOOD. (K)SDR ALG2006F00005Brushes · failedGENERATOR FAILED IN FLIGHT AND WOULD NOT RESET. REMOVED AND REPLACED STARTER/GENERATOR BRUSHES AND RETURNED TO SERVICE. (K)SDR ALG2006F00004Compressor · fodA LOUD ENGINE WHINE OCCURRED DURING TAKEOFF. THIS FLIGHT WAS A MAINTENANCE OPERATIONAL CHECK FLIGHT. A VISUAL INSPECTION REVEALED FOD DAMAGE TO THE ENGINE COMPRESSOR. THE ENGINE WAS REMOVED AND A SERVICEABLE ENGINE WAS INSTALLED. (K)SDR ALG2006F00021Bearing · wornIN CRUISE FLIGHT, FELT BUMP IN AIRFRAME, ALL INSTRUMENTS INDICATED NORMAL. AFTER DESCENDING TO 500 FT, PROBLEM REPEATED. AFTER LANDING, NOTIFIED MAINTENANCE. ANTI-DRIVE LINK BEARINGS WORN. REMOVED AND REPLACED ANTI-DRIVE LINK. (K)SDR ALG2006F00003Transmission · making metalDURING TAKEOFF THE TRANSMISSION CHIP LIGHT ILLUMINATED. FOUND 2 FLAKES ON LOWER CHIP PLUG. TRANSMISSION REMOVED FOR METAL. (K)SDR AOC05004Spring · brokenDURING A 300 HR INSPECTION, A LEAD/LAG DAMPER SPRING WAS FOUND BROKEN IN 2 PLACES. JUDGING FROM THE BREAK LINES, THE SPRING HAD BEEN CRACKED FOR SOME TIME.SDR CA051223004Clutch · cracked4 FATIGUE CRACKS WERE FOUND AROUND TWO LOWER ENGINE ATTACHMENT BOLT HOLES.SDR CA051208006Skin · crackedSKIN FOUND TO BE CRACKED DURING ROUTINE INSPECTION.
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