# Service difficulty reports: Bell 47G-3B A list on [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b.md). Newest first. General aviation reporting is voluntary. - [SDR AUS20020628](https://openairdocs.org/sdr/AUS20020628.md): Stud · failed · Apr 21, 2002 · Bell 47G3B · Rotorcraft Cooling Fan System > (AUS) COOLING FAN MOUNT STUD LOCATED ON CRANKCASE FAILED. LOSS OF TENSION ALLOWED BELT TO FALL OFF AND DESTROY THE COOLING FAN. - [SDR AU990947](https://openairdocs.org/sdr/AU990947.md): Pitch Horn · loose · Aug 25, 1999 · Bell 47G3B · Tail Rotor Blades > (AUS) TAIL ROTOR BLADE PITCH HORN LOOSE. - [SDR AU981510](https://openairdocs.org/sdr/AU981510.md): Spring · broken · Sep 30, 1998 · Bell 47G3B · Reciprocating Engine Cylinder Section > (AUS) NR 1 CYLINDER INLET VALVE OUTER VALVE SPRING BROKEN. - [SDR AU980929](https://openairdocs.org/sdr/AU980929.md): Driveshaft · misaligned · Jul 2, 1998 · Bell 47G3B · Tail Rotor Drive Shaft > (AUS) TAIL ROTOR DRIVE SHAFT AND BEARINGS OUT OF ALIGNMENT. GREASE DISCOLOURED AT NR 1, NR 2, NR 7, AND NR 8 BEARINGS. ALL BEARINGS SHOWED SIGNS OF HEAVY WEAR. - [SDR AU980288](https://openairdocs.org/sdr/AU980288.md): Bearing · worn · Mar 18, 1998 · Bell 47G3B · Main Rotor Control > (AUS) PILOTS COLLECTIVE LEVER BEARING WORN. UNAPPROVED REPAIR HAD BEEN CARRIED OUT TO TAKE UP THE PLAY IN THE WORN SHAFT AND BEARING. UNAPPROVED REPAIR. PERSONNEL/MAINTENANCE ERROR. - [SDR AU980287](https://openairdocs.org/sdr/AU980287.md): Drive Shaft · worn · Mar 18, 1998 · Bell 47G3B · Tail Rotor Drive Shaft > (AUS) TAIL ROTOR DRIVE SHAFT COUPLING SPLINES WORN 0.3556MM (0.014 INCH) BELOW MINIMUM DIMENSIONS. - [SDR AU980290](https://openairdocs.org/sdr/AU980290.md): Nut · worn · Mar 11, 1998 · Bell 47G3B · Main Rotor Head > (AUS) MAIN ROTOR RETAINING NUT FACE WORN BY SEAL EDGE LIP. - [SDR AU980278](https://openairdocs.org/sdr/AU980278.md): Nut · worn · Mar 11, 1998 · Bell 47G3B · Main Rotor Head > (AUS) MAIN ROTOR MAST NUT WORN. SEAL EDGE LIP WORN INTO NUT FACE. - [SDR AU980234](https://openairdocs.org/sdr/AU980234.md): Support · cracked · Mar 3, 1998 · Bell 47G3B · Main Rotor Head > (AUS) STABILIZER BAR DAMPER SUPPORT PLATE CRACKED AT ONE OF THE FOUR MOUNTING BOLT HOLES. - [SDR AU971398](https://openairdocs.org/sdr/AU971398.md): Cooling Fan · corroded · Nov 8, 1997 · Bell 47G3B · Rotorcraft Cooling Fan System > (AUS) COOLING FAN CORRODED. TWO ADJACENT BLADES BROKEN OFF. BROKEN BLADES CUT THROUGH THE VOLTAGE REGULATOR COVER AND IMPACTED THE REGULATOR COOLING FINS. THEY THEN TRAVELLED DOWNWARDS, DAMAGING THE FUEL GAUGE LINE BEFORE COMING TO REST ON THE TAIL ROTOR CONTR - [SDR 98ZZZX84](https://openairdocs.org/sdr/98ZZZX84.md): Bellows · failed · Oct 28, 1997 · N47AH · Bell 47G3B · Fuel Control/Reciprocating Engines > HELICOPTER LOST ENGINE POWER IN-FLIGHT. DURING GROUND RUN TROUBLESHOOTING PROCESS, THE ENGINE WOULD NOT OPERATE ABOVE 1500 RPM. THE MARVEL SCHEBELER (MODEL MA-6AA, SN AH-1-383) CARBURETOR WAS BENCH TESTED BY THE NTSB AND WOULD ONLY PERFORM APPROXIMATELY 50 P - [SDR AU971468](https://openairdocs.org/sdr/AU971468.md): Turbocharger · failed · Aug 13, 1997 · Bell 47G3B · Exhaust Turbocharger > (AUS) ENGINE TURBOCHARGER FAILED. INVESTIGATION FOUND THAT THE EXHAUST TURBINE HAD BEEN SKIDDING ON THE REAR THRUST FACE. - [SDR AU961097](https://openairdocs.org/sdr/AU961097.md): Cooling Fan · cracked · Aug 1, 1996 · Bell 47G3B · Rotorcraft Cooling Fan System > (AUS) ENGINE COOLING FAN BLADE CRACKED AT BASE - [SDR AU960911](https://openairdocs.org/sdr/AU960911.md): Grip · cracked · Jun 14, 1996 · Bell 47G3B · Main Rotor Head > (AUS) MAIN ROTOR HEAD GRIPS CRACKED - FOUND DURING EDDY CURRENT INSPECTION IAW AD/BELL47/92 AMDT4 - [SDR AU960819](https://openairdocs.org/sdr/AU960819.md): Bearing · failed · May 30, 1996 · Bell 47G3B · Main Rotor Gearbox > (AUS) TRANSMISSION FAN DRIVE BEARING FAILED - METAL CONTAMINATION OF OIL SYSTEM - [SDR AU960689](https://openairdocs.org/sdr/AU960689.md): Bearing · failed · May 21, 1996 · Bell 47G3B · Main Rotor Gearbox > (AUS) MAIN TRANSMISSION LOWER SUN GEAR BEARING CAGE DISINTEGRATED - BEARING OIL PRESSURE JETS WERE ALSO FOUND TO BE BLOCKED WITH A NON FERROUS METAL (METAL DID NOT ORIGINATE FROM THE TRANSMISSION)- TRANSMISSION HAD BEEN FITTED FOR APPROXIMATELY 80 HOURS -FURT - [SDR AU960822](https://openairdocs.org/sdr/AU960822.md): Bearing · failed · May 20, 1996 · Bell 47G3B · Main Rotor Gearbox > (AUS) MAIN TRANSMISSION COOLING FAN DRIVE BEARING FAILED - METAL CONTAMINATION OF TRANSMISSION OIL SYSTEM - [SDR AU960537](https://openairdocs.org/sdr/AU960537.md): Plate · cracked · Apr 16, 1996 · Bell 47G3B · Main Rotor Mast/Swashplate > (AUS) MAIN ROTOR SWASHPLATE CONTROL PLATE FORE/AFT CYCLIC INPUT HORN LUG CRACKED AND BROKEN ON LH SIDE - [SDR AU960823](https://openairdocs.org/sdr/AU960823.md): Bearing · failed · Apr 12, 1996 · Bell 47G3B · Main Rotor Mast/Swashplate > (AUS) MAIN ROTOR MAST BEARING FAILED - SUSPECT CAUSED BY HEAVY LANDING - METAL CONTAMINATION OF OIL SYSTEM - [SDR AU960435](https://openairdocs.org/sdr/AU960435.md): Bearing · undersize · Mar 28, 1996 · Bell 47G3B · Engine/Transmission Coupling > (AUS) MAIN ROTOR FREE WHEEL UNIT BEARING ROLLERS UNDERSIZE - SEE MDR 96/0433 FOR ADDITIONAL INFORMATION - [SDR AU960433](https://openairdocs.org/sdr/AU960433.md): Bearing · undersize · Mar 28, 1996 · Bell 47G3B · Engine/Transmission Coupling > (AUS) MAIN ROTOR TRANSMISSION DRIVE FLANGE SHEAR SCREWS DISTORTED - SUSPECT DUE TO SLIPPAGE OF THE FREEWHEEL UNIT DUE TO FITMENT OF UNDERSIZE BEARING ROLLERS AND SUBSEQUENT SHOCK LOADING DURING RE-ENGAGEMENT - SEE ALSO MDR 96/0435 AND MDR 96/0341 - [SDR AU960323](https://openairdocs.org/sdr/AU960323.md): Seat Belt · wrong part · Mar 20, 1996 · Bell 47G3B · Flight Compartment Equipment > (AUS) SEAT BELTS DO NOT COMPLY WITH NOTE 2 OF AD/RES/27 AMDT1 - UNAPPROVED PART - [SDR AU960341](https://openairdocs.org/sdr/AU960341.md): Bearing · worn · Feb 23, 1996 · Bell 47G3B · Engine/Transmission Coupling > (AUS) MAIN ROTOR TRANSMISSION PNO 47-620-600-27 MAIN DRIVE FLANGE SHEARBOLTS PNO 047-620-485-009 SHEARED - DAMAGE TO MAIN ROTOR SWASHPLATE AND CONTROL RODS - TAIL ROTOR DRIVE SHAFT FAILED AT FORWARD HANGER BEARING - INSPECTION FOUND THAT THE ROLLER BEARINGS PN - [SDR AU960065](https://openairdocs.org/sdr/AU960065.md): Bearing · seized · Jan 19, 1996 · Bell 47G3B · Tail Rotor Control System > (AUS) TAIL ROTOR CONTROL BARREL BEARING SEIZED - BEARINGS ARE SEALED UNITS ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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 aircraft_model_key = '47G3B' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/bell-47g-3b/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.