# Service difficulty reports: Bell UH-1B A list on [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b.md). Newest first. General aviation reporting is voluntary. - [SDR UPX2009F00004](https://openairdocs.org/sdr/UPX2009F00004.md): Control Servo · leaking · May 31, 2009 · N64RA · Bell UH1B · Rotorcraft Servo System > ON STARTUP FOR A FLIGHT, MECHANIC NOTICED LARGE PUDDLE OF HYD FLUID UNDER FUSELAGE. CLOSER INSPECTION REVEALED THE LT CYCLIC SERVO WAS LEAKING A LARGE AMOUNT OF HYDRAULIC FLUID. THE LEAK WAS SEVERE ENGOUGH THAT IT COULD HAVE RESULTED IN A LOSS OF HYD PRESSUR - [SDR UPX2009F00003](https://openairdocs.org/sdr/UPX2009F00003.md): Saddle · cracked · May 31, 2009 · N64RA · Bell UH1B · Main Landing Gear > ON DAILY INSPECTION, FOUND LT FWD OTBD LANDING GEAR SADDLE CRACKED LONGITUDINALLY AT FILLET AREA. REPLACED SADDLE AND RETURNED TO SERVICE. (K) - [SDR H5O2008F00000](https://openairdocs.org/sdr/H5O2008F00000.md): Liner · worn · Dec 5, 2007 · N46969 · Bell UH1B · Rotorcraft Servo System > PILOT EXPERIENCED COLLECTIVE BOUNCE ON TAKEOFF. INSPECTION OF COLLECTIVE LINERS SHOWED SUFFICIENT AMOUNT OF LINER REMAINING IN THE WEAR AREA. WITH FURTHER INSPECTION, THE MINIMUM COLLECTIVE FRICTION WAS TOO LOW. INSPECTION ON NR 3 AND NR 6 PHASE IAW TM 55-1 - [SDR 2008FA0000031](https://openairdocs.org/sdr/2008FA0000031.md): Liner · worn · Dec 5, 2007 · N46969 · Bell UH1B · Main Rotor Control > PILOT EXPERIENCED COLLECTIVE BOUNCE ON TAKEOFF. INSPECTION OF COLLECTIVE LINERS SHOWED A SUFFICIENT AMOUNT OF LINER REMAINING IN THE WEAR AREA. WITH FURTHER INSPECTION, THE MINIMUM COLLECTIVE FRICTION WAS TOO LOW. INSPECTION ON NR 3 AND NR 6 PHASE IAW TM 55 - [SDR H9X2007F00000](https://openairdocs.org/sdr/H9X2007F00000.md): Housing · damaged · Dec 1, 2007 · N198HM · Bell UH1B · Tail Rotor Drive Shaft > AIRCRAFT WAS RETURNING HOME FROM FLIGHT AND PILOT NOTICED THE PEDALS WERE NOT OPERATING NORMALLY. HE THEN BEGAN CIRCLING THE AIRPORT UNTIL WE DETERMINED THAT THE PROBLEM WAS A PARTIALLY LT STUCK TAIL ROTOR PEDAL, AT WHICH TIME HE DECLARED AN EMERGENCY AND LA - [SDR AU000186](https://openairdocs.org/sdr/AU000186.md): Blade · failed · Jan 25, 2000 · Bell UH1B · Turbine Engine Compressor Section > (AUS) THIRD STAGE COMPRESSOR DISC AND BLADES DESTROYED. DOWNSTREAM COMPRESSOR DAMAGE. NO DAMAGE TO THE FIRST TWO STAGES. - [SDR 98ZZZX2792](https://openairdocs.org/sdr/98ZZZX2792.md): Regulator · failed · Jun 29, 1998 · N847MC · Bell UH1B · DC Regulator > VOLTAGE REGULATOR WILL NOT HOLD VOLTAGE. REMOVED FROM AIRCRAFT AND SENT TO REPAIR. - [SDR 97ZZZX2776](https://openairdocs.org/sdr/97ZZZX2776.md): Fin Spar · cracked · May 27, 1997 · N99478 · Bell UH1B · Vertical Stabilizer, Spar/Rib > DURING ROUTINE VISUAL INSPECTION WHILE REFUELING, CRACK IN TAILBOOM SPAR CAP WAS DETECTED. MECHANIC STATED NO CRACK WAS NOTED DURING PRE-FLIGHT INDICATING IT FORMED WITHIN AN HOUR OF OPERATION. NO FRETTING NOTED TO SUPPORT THIS. GARLICK HELICOPTERS ALERT SB - [SDR 97ZZZX1991](https://openairdocs.org/sdr/97ZZZX1991.md): Grip · defective · Mar 13, 1997 · N22753 · Bell UH1B · Tail Rotor Control System > BUSHING FOR PITCH LINK DOES NOT PROTRUDE FLUSH ON BACK SIDE OF GRIP EAR. THEREFORE, SINGLE STEEL WASHER UNDER NUT OF PC LINK BOLT SITS OVER RECESS AND CAN 'DISH' INTO RECESS CAUSING BOLT TO LOOSE TORQUE. PC LINK CONTACTED GRIP EAR AS LOOSE BOLT MOVED. - [SDR 97ZZZX1939](https://openairdocs.org/sdr/97ZZZX1939.md): Bearing · spalled · Mar 13, 1997 · N600MA · Bell UH1B · Main Rotor Gearbox > SPALLING ON BALLS AND OUTER RACE OF BEARING. THIS BEARING IS USED IN SEVERAL DIFFERENT APPLICATIONS IN THE DRIVE TRAIN OF BELL HELICOPTERS. - [SDR GJQR0000098](https://openairdocs.org/sdr/GJQR0000098.md): Blade · debonded · Oct 22, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > C/W ASB 204-96-48 DUE TO POSSIBILITY OF DEBONDING OF THE MAIN SPAR LEADING EDGE DOUBLER. SEE AD 96-12-26. REPLACED WITH NEW BLADES FROM CSF STOCK. (X) - [SDR GJQR0000097](https://openairdocs.org/sdr/GJQR0000097.md): Blade · debonded · Oct 22, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > C/W ASB 204-96-48 DUE TO POSSIBILITY OF DEBONDING OF THE MAIN SPAR LEADING EDGE DOUBLER. SEE AD 96-12-26. REPLACED WITH NEW BLADES FROM CSF STOCK. (X) - [SDR UNKN0000096](https://openairdocs.org/sdr/UNKN0000096.md): Blade · corroded · Oct 17, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 4TH SET FROM BHT - REORDERED 5TH SET FROM BHT. - [SDR UNKN0000095](https://openairdocs.org/sdr/UNKN0000095.md): Blade · corroded · Oct 17, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 4TH SET FROM BHT - REORDERED 5TH SET FROM BHT. - [SDR UNKN0000094](https://openairdocs.org/sdr/UNKN0000094.md): Blade · corroded · Oct 16, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 3RD SET FROM BHT - REORDERED 4TH SET FROM BHT. (X) - [SDR UNKN0000093](https://openairdocs.org/sdr/UNKN0000093.md): Blade · corroded · Oct 16, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 3RD SET FROM BHT - REORDERED 4TH SET FROM BHT. - [SDR UNKN0000092](https://openairdocs.org/sdr/UNKN0000092.md): Blade · corroded · Oct 10, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 2ND SET FROM BHT - REORDERED 3RD SET FROM BHT. (X) - [SDR UNKN0000091](https://openairdocs.org/sdr/UNKN0000091.md): Blade · corroded · Oct 10, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. 2ND SET RECEIVED FORM BHT - REORDERED 3RD SET FROM BHT. (X) - [SDR UNKN0000090](https://openairdocs.org/sdr/UNKN0000090.md): Blade · corroded · Oct 10, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. RECEIVED FROM BHT AS IS - REORDERED 2ND SET FROM BHT. (X) - [SDR UNKN0000089](https://openairdocs.org/sdr/UNKN0000089.md): Blade · corroded · Oct 10, 1996 · N102FW · Bell UH1B · Tail Rotor Blades > PART IS CORRODED. REPLACED WITH BLADE FROM BHT. (X) ## 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 = 'UH1B' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/bell-uh-1b/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.