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.

SDR ALGAR291144029Mount · crackedUPON DISASSEMBLY OF COMPRESSOR FOR 2000 HR INSP, FOUND CRACKING OF FWD FLANGE AT BOLT HOLES.Feb 9, 2011 · N447AL · Bell 407 · Engine Mount SectionSDR CA110211005Window · separatedRIGHT REAR EMERGENCY EXIT WINDOW BLEW OUT AND CONTACTED THE TAIL ROTOR. ON DESCENT, PILOT HEARD WHAT SOUNDED LIKE A WINDOW OPEN. AS HE LOOKED BACK OVER HIS SHOULDER, SAW THE RT REAR EMERGENCY EXIT WINDOW BLOW OUT. LANDED AND INSPECTED THE ACFT. AFTER CLFeb 9, 2011 · Bell 407 · Passenger Compartment WindowsSDR CA110208020Elt · malfunctionedWHEN SWITCHED TO THE ARM POSITION, ELT IS ACTIVATED. SENT TO REPAIR FACILITY.Jan 31, 2011 · Bell 407 · Emergency Locator BeaconSDR CA110211009Release Cable · brokenWHILE APPROACHING HAD AN UNCOMMAND RELEASE OF THE CARGO HOOK. INVESTIGATION REVEALED THAT THE MANUAL RELEASE CABLE SHEATH HAD BROKEN ADJACENT TO THE SWAGE FITTING ON THE CARGO HOOK END. THE SHEATH BREAKING OFF NEAR THE SWAGED FITTING CHANGED THE RIGGING OF THEJan 30, 2011 · Bell 407 · Cargo CompartmentsSDR CA110211007Release Cable · brokenTHE PILOT TOOK OFF FROM STAGING WITH A LONG LINE ON CARGO HOOK WHILE IN CRUISE AN UNCOMMAND HOOK RELEASED OCCURRED. AFTER OCCURENCE THE ENGINEER INVESTIGATED THE DEFECT AND FOUND THE MANUAL RELEASE CABLE SHEATH HAD BROKEN AJACENT TO THE SWAGE FITTING ON THE CJan 29, 2011 · Bell 407 · Cargo CompartmentsSDR ALGAR1271145515Mount · crackedFOUND CRACKING OF FWD FLANGE OF REAR SUPPORT.Jan 27, 2011 · N587AL · Bell 407 · Engine Mount SectionSDR CA110128007Bearing · delaminated(CAN) THE ENGINEER WAS TROUBLESHOOTING A VIBRATION WHEN IT WAS DISCOVERED, VISUALLY A DELAMINATION OF THE RUBBER COMPOUND OF THE SHEAR BEARING.Jan 26, 2011 · Bell 407 · Main Rotor HeadSDR ALGA1191144766Mount · crackedCRACK OF FWD FLANGE THROUGH BOLT HOLES AND DOUBLER PLATE.Jan 19, 2011 · N727AL · Bell 407 · Engine Mount SectionSDR CA110225003Bearing · damaged(CAN) TRANSMISSION CHIP LIGHT EXPERIENCED IN FLIGHT, METAL FOUND ON TRANSMISION CHIP PLUGS. MAST ASSY REMOVED FOR INSPECTATION. MAST BEARING FOUND TO HAVE 1 UNSERVICEABLE BALL BEARING. NEW BEARING INSTALLED.Jan 14, 2011 · Bell 407 · Main Rotor Mast/SwashplateSDR QMLA2011011211006Blade · crackedDURING ROUTINE AIRWORTHINESS CHECK FOUND 2 CRACKS IN THE L/E OF ONE OF THE MAIN ROTOR BLADES.Jan 12, 2011 · N407UH · Bell 407 · Main Rotor BladesSDR QMLA201101061003Indicator · malfunctionedPILOT STATED TORQUE WENT TO 110.6 FOR (1) SECOND DURING START. CLEARED FAULT FROM GAUGE IAW MM CH 76, PROPULSION INSTRUMENT GUIDE AND EMC-35A MX GUIDE. NO FADEC FAULTS NOTED. COMPLIED WITH MM 71-14, 71-7, 71-8, TABLE 95-4 AND MM 72-00-00 PARA 1.B, PAGE 622. Jan 6, 2011 · N911KX · Bell 407 · Engine BMEP/Torque IndicatingSDR HEEA130015Bearing · spalledENGINE WAS REMOVED FOR A 2000 HR INSP AND A TURBINE O/H. NR 5 BRG EXHIBITED SPALLING ON OUTER RACE AT SPLIT. INSTALLED NEW NR 5 BEARING.Jan 1, 2011 · N430PH · Bell 407 · Turbine SectionSDR ALGA123010AFS1227Pinion Gear · crackedNUMEROUS CRACKS ON INNER SURFACE WHERE ROLLER SET RIDES.Dec 30, 2010 · N697AL · Bell 407 · Main Rotor GearboxSDR ALGA122810587ALBleed Air Sys · smokeIN CRUISE FLIGHT, FRONT SEAT PASSENGER ALERTED PILOT AN ODOR OF SOMETHING BURNING THEN SAW SMOKE BY HIS FEET (HEATER VENT AREA). PILOT TURNED OFF HEATER AND RETURNED TO BASE. ACFT EQUIPPED WITH ENGINE BLEED AIR HEATER. SUSPECTING AN ENGINE INTERNAL SEAL FAILDec 28, 2010 · N587AL · Bell 407 · Engine Bleed Air SystemSDR CA101217004Bearing · failed(CAN) THE PILOT WAS FLYING AND A ENGINE CHIP LIGHT OCCURRED. HE LANDED THE AIRCRAFT. THE ENGINEER PULLED THE CHIP DETECTORS AND FOUND FERROUS METAL. CLEANED PLUGS, DRAINED OIL, CLEANED GEARBOX OIL FILTER, AND REPLACED SCAVANGE OIL FILTER. COMPLETED ANOTHER GRDec 15, 2010 · Bell 407 · Turbine SectionSDR CA101217002Bearing · failed(CAN) ACFT WAS CLIMBING UP A SLOPE AND PREPARING TO SET UP AN APPROACH FOR LANDING ON TOP OF A RIDGE WHEN THE ENGINE APPEARED TO HAVE LOST POWER OR QUIT. THE PILOT LOWERED THE COLLECTIVE AND DESCENDED TO SET UP FOR LANDING, FLARED FOR LANDING AND LANDED HARD.Dec 15, 2010 · Bell 407 · Turbine Engine Compressor SectionSDR HEEA129893Bearing · spalledENGINE REMOVED DUE TO METAL IN OIL. NR5 BRG OUTER RACE AND BALLS ARE SPALLED, SEPERATOR IS WORN AND CRACKED. INSTALLED REPLACEMENT PARTS.Dec 7, 2010 · N406PH · Bell 407 · Turbine SectionSDR CA101206022Servo · binding(CAN) THIS ACTUATOR WAS RECEIVED FOR REPAIR WITH COMMENTS "BINDING DURING INPUT". A FUNCTIONAL TEST WAS CARRIED OUT. DUE TO WEAR IN THE INPUT LINKAGE BUSHINGS AND BOLTS, THE SERVO VALVE TRAVEL WAS LIMITED ENOUGH TO RESTRICT THE SPEED OF THE ACTUATOR. WEAR IN TDec 6, 2010 · Bell 407 · Hydraulic System, MainSDR 2010FA0001235Bearing · wornPILOT REPORTED M/R VIBRATION. FOUND BEARING WORN IN MAIN ROTOR HEAD.Dec 3, 2010 · N7160V · Bell 407 · Main Rotor HeadSDR HEEA129880Bearing · spalledENGINE REMOVED FOR TURBINE O/H. NR5 BRG EXHIBITED SPALLING ON OUTER RACE AND BALLS. REPLACED NR5 BRG.Nov 23, 2010 · N501PH · Bell 407 · Turbine SectionSDR FXGA74CHeater · crackedSHUTDOWN CABIN HEATER DUE TO POSSIBLE CO2 LEAK. REPLACED CABIN HEATER IAW AB LMM 27-55 PARA 2. OPS AND LEAK CHECK GOOD.Oct 22, 2010 · N6174C · Doug DC6A · Heating SystemSDR CA101026003Blade · crackedDURING 600HR/6 MONTH INSP CRACKS WERE FOUND ON THE L/E EROSION STRIP ON 2 OF THE 4 BLADES. THE CRACKS STARTED AT THE L/E AND GO TOWARD THE T/E. ALL THE CRACKS ARE ON THE TOP OF THE BLADE AND OTBD OF BLADE STA 138.0. BLADES WERE REMOVED FROM SERVICE FOR REPAOct 8, 2010 · Bell 407 · Main Rotor BladesSDR HEEA129747Bearing · spalledENGINE REMOVED DUE TO METAL IN OIL. NR5 BEARING EXHIBITED SPALLING OF OUTER RACE, N1 COUPLING PN 23032345 IS OUT OF BALANCE, WASHER PN 6848996-3 IS WORN, CUP WASHER PN 6889319 HAD METAL FALLOUT AT SAFETY LOCATION. SCRAPPED PARTS AND REPLACED WITH NEW.Oct 5, 2010 · N433P · Bell 407 · Turbine SectionSDR CA100927009Bearing · debonded(CAN) WHEN AIRCRAFT CAME IN FOR A 300 HOUR AIRFRAME INSPECTION ONE OF THE SNAGS REPORTED WAS A BLACK STREAK UNDER THE BLUE TRIANGLE BLADE GRIP. THE PILOT ALSO REPORTED THAT THE SEEMED TO BE GETTING A MORE OF A LATERAL AND VERTICAL. THIS DEFECT DREW THE MAINTSep 23, 2010 · Bell 407 · Main Rotor HeadSDR ALGA4417591710Flange · crackedFOUND CRACKING OF FWD FLANGE BEYOND REPAIRABLE LIMITS.Sep 17, 2010 · N537AL · Bell 407 · Turbine Engine Compressor SectionSDR QMLRMD7081Seat Frame · chafedTHE 3 CREW SEAT BACK FRAMES EACH HAVE 2 CROSS TUBES EACH OF WHICH THE TUBE WALL THICKNESS HAS BEEN REDUCED BY ABRAISON AGAINST MATING ACFT STRUCTURE. EACH AREA OF ABRASION VAIRIES IN WIDTH FROM APPROX 2 TO 3 INCHES WIDE.Sep 16, 2010 · N407LL · Bell 407 · Flight Compartment EquipmentSDR CA101019016Support · brokenCOMPRESSOR RECEIVED FOR GENERATING METAL. FOUND PORTIONS OF REAR SUPPORT BROKEN OFF AT NR 2 BEARING RETAINING RING GROOVE.Sep 15, 2010 · Turbine Engine Compressor SectionSDR QMLRMD7082Support Angle · damagedRT CHIN WINDOW FRAME HAS A DEEP CREASE ON THE INBD SIDE, THE DOUBLER FOR THE EXTERNAL POWER RECEPTACLE HAS 3 EA, PUNCTURES 0.050" BELOW THE PITOT TUBE, A DEEP CREASE WHERE THE WINDOW MOUNTS, THE SUPPORT ANGLE ON THE INSIDE BELOW THE DRAIN TUBE HAS A 2.0" CRACKSep 14, 2010 · N407LL · Bell 407 · Fuselage Main, StructureSDR ALGA991044688Shaft · crackedENGINE HAD HIGH OIL CONSUMPTION. DISASSEMBLED PT SECTION OF TURBINE AND DISASSEMBLED PT ROTOR. FOUND EXCESSIVE AMOUNT OF OIL BETWEEN PT INNER AND PT OUTER SHAFTS. CLEANED OFF PARTS AND INSPECTED. DISCOVERED CRACK IN INNER SHAFT BELOW INNER NUT THREADS WHICH CSep 9, 2010 · N407AL · Bell 407 · Turbine SectionSDR CA100920011Bearing · failed(CAN) CUSTOMER REMOVED THE ENGINE FOR METAL IN OIL. UPON INSPECTION THE NR 2 BEARING SEPARATOR WAS FOUND CRACKED. THE BALLS OF THE BEARING ARE SPALLED. ENGINE OVERHAUL AT 1999.6 HRS. REPAIR FOR METAL IN OIL AT 2166.4 HOURS TSN, AT THIS REPAIR IT WAS NOTICESep 9, 2010 · Bell 407 · Turbine Engine Compressor SectionSDR CA100907009Hose · leakingHOSE WAS FOUND ON DI TO TO WEEPING. CONTINUED TO GET WORSE TO THE POINT WHERE IT WAS BEYOND LIMITS AND GROUNDED THE ACFT.Sep 6, 2010 · Bell 407 · Turbine Engine Oil SystemSDR ALGA082710697ALDrive Shaft · wornHYD SYS LIGHT ILLUMINATED IN FLIGHT. MX FOUND HYD PUMP DRIVESHAFT SPLINES AND TRANSMISSION OIL PUMP OUTPUT SHAFT SPLINES WORN AWAY. R & R HYD PUMP DRIVESHAFT AND TRANSMISSION OIL PUMP.Aug 27, 2010 · N697AL · Bell 407 · Hydraulic Pump (Electric/Engine), MainSDR CA100818002Yoke · damagedDURING HIS WALK AROUND, THE PILOT DISCOVERED A HAIRLINE CRACK IN THE PAINT OF THE FWD EDGE OF THE TAIL ROTOR HUB (IN LINE WITH THE AXIS OF OUTPUT SHAFT OF THE TAIL ROTOR GEARBOX) AND ON THE ORANGE BLADE SIDE. AME 1 WASN`T HAPPY WITH THE WAY IT LOOKED ON PRELIAug 9, 2010 · Bell 407 · Tail Rotor HeadSDR CA100707002Blade · delaminatedPILOT REPORTED VIBRATION FELT. LANDED AND FOUND LOWER SURFACE OF BLADE SKIN DELAMINATED AND CURLED BACK FROM THE L/E. ACFT IS GROUNDED WAITING FOR A REPLACEMENT BLADE.Jul 5, 2010 · Bell 407 · Main Rotor BladesSDR 2010F00141Blade · debondedLOWER MAIN ROTOR BLADES SKIN DELAMINATION FROM BLADE STATION 196 TO BLADE STATION 210.Jul 4, 2010 · N402SH · Bell 407 · Main Rotor BladesSDR CA100721011Bearing · making metalTHE PILOT WAS STARTING THE ENGINE AND AT IDLE GOT A WARNING OF A ENGINE CHIP LIGHT. THE ENGINE WAS SHUTDOWN AND THE ENGINEER VIEWED THE CHIP PLUGS. THERE WAS FERROUS METAL ON BOTH PLUGS MORE ON THE BOTTOM CHIP PLUG. THE TURBINE WAS REMOVED AND SENT TO A APPJun 29, 2010 · Bell 407 · Turbine SectionSDR HEEA128605Bearing · spalledENGINE REMOVED DUE TO METAL IN OIL, NR 5 BRG EXHIBITED EXCESSIVE SPALLING ON BALLS AND OUTER RACE AND WORN AND CRACKED SEPARATOR. ORDERED REPLACEMENT BEARING.Jun 13, 2010 · N421PH · Bell 407 · Turbine SectionSDR CA100612001Crosstube · crackedPILOT LANDED ON A LOG PAD IN A MARSHY AERA TO FACILITATE A CREW CHANGE. THE ACFT WAS SPOOLED BACK TO FLIGHT IDLE AND THE CREW MEMBERS DEPARTED AND THE OTHER CREW BORDED THE ACFT. AS PILOT WAS ROLLING THE THROTTLE BACK UP TO 100 PERCENT, THE PILOT HEARD A LOUJun 9, 2010 · Bell 407 · Wheel/Ski/FloatSDR 2010FA0000525Bevel Gear · crackedMAIN ROTOR TRANSMISSION WAS MAKING VERY SMALL AMOUNTS OF METAL, BUT ENOUGH TO KEEP SETTING OFF THE CHIP DETECTOR. STRAINED OIL AND FILTER LOOKED NORMAL. TEAR DOWN INSPECTION, FOUND BEVEL GEAR COMPLETELY CRACKED THROUGH. THERE WHERE NO OVER TORQUE INDICATIONS. Jun 7, 2010 · N18SP · Bell 407 · Main Rotor GearboxSDR HEEA128580Bearing Race · spalledENGINE REMOVED DUE TO METAL IN OIL. 5 BEARING EXHIBITS SPALLING OUTER RACE AND BALLS. RETURNED TO MFG FOR INVESTIGATION ON AFA714586.Jun 6, 2010 · N420PH · Bell 407 · Turbine SectionSDR ALGA641016868Bearing · bindingBEARING IS BINDING AND HAS AXIAL PLAY BEYOND LIMITS.Jun 4, 2010 · N404AL · Bell 407 · Flight Control SystemSDR CA100607006Bearing · failedMAIN ROTOR CHIP LIGHT CAME ON, TRANSMISSION REMOVED AND SENT FOR REPAIR, MAST BEARING FOUND UNSERVICEABLE AND REPLACED.May 22, 2010 · Bell 407 · Main Rotor Mast/SwashplateSDR ALGA051810A9076Bearing · bindingBEARING HAS BINDING, AXIAL PLAY, AND RATCHETING BEYOND LIMITS.May 18, 2010 · N436AL · Bell 407 · Main Rotor Mast/SwashplateSDR HEEA129892Bearing · spalledTURBINE HAS SPALLING BALLS AND OUTER RACE. REPLACED WITH NEW BEARING.May 10, 2010 · N494PH · Bell 407 · Turbine SectionSDR CA100505001Trim Tab · delaminatedAREA 3 INCHES AROUND TRIM TAB DELAMINATED, THIS TAB WAS REPLACED AT 2500 HOURS.May 3, 2010 · Bell 407 · Main Rotor BladesSDR CA100429011Blade · cracked(CAN) UPON AN INSPECTION IT WAS NOTED THAT THAT A SURFACE CRACK WAS DEVELOPING NEAR THE BLADE BOLT HOLE . FURTHER INVESTIGATION REVEALED THAT THE CRACK HAD THIS RED/ORANGE PLASTIC MATERIAL COMING OUT OF IT.Apr 28, 2010 · Bell 407 · Main Rotor BladesSDR CA100427004Hub · damaged(CAN) THREAD DAMAGED FOUND DURING ATTEMP TO REPLACE A DROOP STOP STUD. STUD IN QUESTION HAD ORIGINAL LOCKWIRE FROM FACTORY PRIOR TO REMOVAL OF STUD.Apr 26, 2010 · Bell 407 · Main Rotor HeadSDR HEEA127901Channel · crackedCHANNEL IS CRACKED BEYOND REPAIRABLE LIMITS. REPLACED WITH NEW PART.Mar 25, 2010 · N447PH · Bell 407 · Fuselage Miscellaneous StructureSDR ALGA3/17/102536Bearing · overheatedBEARING PN 407-340-339-107, SN ZS25535, EXHIBITED SIGNS OF OVERHEATED CONDITION. EXPELLED GREASE WAS BLACK AND THE TEMP INDICATOR ON THE BEARING HANGER WAS BLACK.Mar 17, 2010 · N406AL · Bell 407 · Tail Rotor Drive ShaftSDR ALGA3/17/102514Bearing · overheatedBEARING PN 407-340-339-107, SN ZV13231, TT 366.4 EXHIBITED SIGNS OF OVERTEMP CONDITION. EXPELLED GREASE WAS BLACK AND THE OVERHEAT TEMP INDICATOR ON THE BEARING HANGER WAS BLACK.Mar 17, 2010 · N406AL · Bell 407 · Tail Rotor Drive Shaft
Back to Allison 250-C47B