# Service difficulty reports: Bell UH-1H

A list on [Bell UH-1H](https://openairdocs.org/model/bell-uh-1h.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 2 · 93 reports

- [SDR 2020FA0000296](https://openairdocs.org/sdr/2020FA0000296.md): Pin · dislodged · Feb 12, 2020 · N812SB · Bell UH1H · Accessory Gearboxes
  > PRIMARY CAUSE OF DAMAGE TO ACCESSORY DRIVE, PIN CAME OUT OF SLEEVE BUSHING AND DAMAGED ADJOINING COMPONENTS. ENGINE IS STILL UNDER TEARDOWN AND INSPECTION.
- [SDR 2018FA0000537](https://openairdocs.org/sdr/2018FA0000537.md): Support · inflt separation · Jul 24, 2018 · N107CH · Bell UH1H · Main Rotor Mast/Swashplate
  > THE SWASHPLATE SUPPORT FAILED AT 1916 HOURS IN SERVICE, PRIOR TO ITS SCHEDULED RETIREMENT LIFE OF 3600 HOURS, FOR UNKNOWN REASONS. TOTAL TIME TRACKING ERRORS WERE NOTED IN RECORDS. WHILE IN CRUISE FLIGHT AT APPROXIMATELY 500 AGL, THE PILOT AND HIS PASSENGER RE
- [SDR 2018FA0000193](https://openairdocs.org/sdr/2018FA0000193.md): Quill · disconnected · Jun 20, 2018 · N777S · Bell UH1H · Tail Rotor Control System
  > AIRCRAFT EXPERIENCED A LOSS OF TAIL ROTOR CONTROL DURING FLIGHT REQUIRING THE PILOT TO CONDUCT A HOVERING AUTOROTATION THAT DAMAGED THE LANDING GEAR AND BELLY OF THE AIRCRAFT. POST INCIDENT SHOWED TAIL ROTOR CONTROLLABILITY AND CONTINUITY FROM THE PEDDLES TO
- [SDR 2018FA0000086](https://openairdocs.org/sdr/2018FA0000086.md): Grip · cracked · Jan 18, 2018 · N72297 · Bell UH1H · Rotorcraft Flight Control
  > LOWER TANG LEADING EDGE HAS A CRACK EXTENDING THRU GRIP TANG TO BLADE BOLT BUSHING. FOUND DURING PREFLIGHT INSPECTION.
- [SDR 2017FA0000601](https://openairdocs.org/sdr/2017FA0000601.md): Line · ruptured · Jul 25, 2017 · N214KK · Bell UH1H · Hydraulic System, Main
  > ONE REPORT DESCRIBING LOSS OF HYDRAULIC FLUID AND SYS PRESSURE. MECHANICS NOTED A HIGH FREQUENCY VIBRATION IN THE HYDRAULIC SYS SPECIFIC TO TUBE WHICH CAN LEAD TO A RUPTURE NEAR ONE OF THE ATTACHMENT FITTING. 11500 PSI HYDRAULIC SYS MODIFICATION ACCOMPLISHME
- [SDR 2017FA0000035](https://openairdocs.org/sdr/2017FA0000035.md): Bolt · loose · Jan 27, 2017 · N407KC · Bell UH1H · Turbine Engine Compressor Section
  > DURING INSPECTION, FOUND THE ENGINE COMPRESSOR STATOR VANE RETAINING BOLT HANGING OUT OF IT'S RECESSED MOUNT HOLE. ENGINE BLEED BAND WAS PREVENTING BOLT FROM FALLING OUT. UPON FURTHER INSPECTION IT WAS DETERMINED THAT THE LOCK CUP HAD BEEN PROPERLY STAKED TO
- [SDR 2014FA0000320](https://openairdocs.org/sdr/2014FA0000320.md): Longeron · cracked · May 14, 2014 · N1206G · Bell UH1H · Rotorcraft Tail Boom
  > DURING HOVER, PILOT HEARD A BANG FROM THE REAR OF THE ACFT. PILOT LANDED BACK AT STAGING AREA. DURING INVESTIGATION, DETERMINED THE TAILBOOM JUST AFT OF THE UPPER LT ATTACHING POINT HAD A CRACK IN THE LONGERON.
- [SDR 2012FA0000656](https://openairdocs.org/sdr/2012FA0000656.md): Blade · misinstalled · Sep 17, 2012 · N7247J · Bell UH1H · Tail Rotor Blades
  > DURING A PHASE 1 INSPECTION, TAIL ROTOR BLADE CLEARANCE FROM VERTICAL STABILIZER WAS INSUFFICIENT AS IT HAD BEEN IMPROPERLY SHIMMED AND INSTALLED ON THE 90 DEGREE GEAR BOX.
- [SDR 2012FA0000655](https://openairdocs.org/sdr/2012FA0000655.md): Scissors · misinstalled · Sep 17, 2012 · N7247J · Bell UH1H · Main Rotor Head
  > DURING A PHASE 1 INSPECTION, SCISSOR HAD BEEN IMPROPERLY ASSEMBLED AND INSTALLED ON THE SLEEVE CAUSING DAMAGE TO THE SLEEVE.
- [SDR 2012FA0000654](https://openairdocs.org/sdr/2012FA0000654.md): Grip · misinstalled · Sep 17, 2012 · N7247J · Bell UH1H · Main Rotor Head
  > DURING A PHASE 1 INSPECTION, MAIN ROTOR GRIP HAD BEEN IMPROPERLY ASSEMBLED AND INSTALLED ON THE MAIN ROTOR YOKE CAUSING DAMAGE TO THE NEEDLE BEARING AND RACE.
- [SDR 2012FA0000308](https://openairdocs.org/sdr/2012FA0000308.md): Cap · broken · Apr 24, 2012 · N72297 · Bell UH1H · Fuselage Structure (General)
  > CAP BROKEN AT BS 238, LBL 14.
- [SDR 2011FA0000657](https://openairdocs.org/sdr/2011FA0000657.md): Blade · cracked · Oct 3, 2011 · N45AD · Bell UH1H · Main Rotor Blades
  > PILOT NOTED A VERTICAL VIBRATION DURING FLIGHT. UPON VISUAL INSPECTION, IT WAS FOUND THAT MAIN ROTOR BLADE HAD CRACKED 90 INCHES FROM BLADE TIP THROUGH THE T/E TO THE SPAR AND 7" TOWARDS THE BLADE ROOT ALONG THE SPAR, ON UPPER AND LOWER SURFACES OF THE BLADE.
- [SDR 2011FA0000518](https://openairdocs.org/sdr/2011FA0000518.md): Pinion Gear · failed · Aug 2, 2011 · N45AD · Bell UH1H · Main Rotor Gearbox
  > GEARBOX WAS O/H AS PART OF AN AIRFRAME REFURBISHMENT PROJECT. THE INPUT QUILL SEAL HAD DEVELOPED AN OIL LEAK AND UPON INVESTIGATION IT WAS FOUND THAT THE INPUT SEAL HAD WORN UNEVEN AND THE MALE COUPLING HAD BECOME UNSERVICEABLE DUE TO A GROOVE WORN BY THE SEA
- [SDR 2007FA0000812](https://openairdocs.org/sdr/2007FA0000812.md): Quill Assy · worn · Sep 19, 2007 · N3053Q · Bell UH1H · Main Rotor Gearbox
  > QUILL INTERNAL SPLINES WORN AND DAMAGED IN QUILL TUBE CONTACT AREA
- [SDR 2006FA0001017](https://openairdocs.org/sdr/2006FA0001017.md): Support Bracket · loose · Oct 20, 2006 · Bell UH1H · Rotorcraft Tail Boom
  > TAIL BOOM ELEVATOR SUPPORT BRACKET LOOSE. (WORKING RIVETS/SITE OF PREVIOUS REPAIR WITH PULL TYPE RIVETS).
- [SDR 2006FA0000530](https://openairdocs.org/sdr/2006FA0000530.md): Fitting · cracked · May 18, 2006 · Bell UH1H · Rotorcraft Tail Boom
  > TAIL BOOM ATTACH FITTING CRACKED UPPER LEFT [TAIL BOOM SIDE]
- [SDR 2006FA0000529](https://openairdocs.org/sdr/2006FA0000529.md): Fitting · cracked · May 18, 2006 · Bell UH1H · Rotorcraft Tail Boom
  > TAIL BOOM ATTACH FITTING CRACKED UPPER LEFT [TAIL BOOM SIDE]
- [SDR 2006FA0000528](https://openairdocs.org/sdr/2006FA0000528.md): Fitting · cracked · May 18, 2006 · Bell UH1H · Rotorcraft Tail Boom
  > TAIL BOOM ATTACH FITTING CRACKED UPPER LEFT [TAIL BOOM SIDE]
- [SDR 2006FA0000231](https://openairdocs.org/sdr/2006FA0000231.md): Fitting · fractured · Feb 27, 2006 · N623PB · Bell UH1H · Rotorcraft Tail Boom
  > AC LANDED FOR SHUTDOWN AFTER OPERATING FOR APPROX 3 FLIGHT HOURS, AC WAS SHAKING DURING SHUTDOWN. DURING POST FLIGHT INSP IT WAS FOUND THAT UPPER LT MOUNT HARD POINT PN 2050318211P ON TAILBOOM (PN 20503280071), WAS FRACTURED, HAD TORN THRU FWD TAILBOOM BLKHD
- [SDR ASI200501A](https://openairdocs.org/sdr/ASI200501A.md): Pin · failed · Jul 15, 2005 · N2767X · Bell UH1H · Main Rotor Head
  > DURING 1200 OVERHAUL OUTBOARD FITTING/STRAP PIN P/N 204-012-104-005, S/N DIFS12334 WAS FOUND BROKEN IN HALF. PIN HAD 1085.1 HOURS SINCE NEW. DISCOLORATION AND CONDITION OF BREAK INDICATES THE BREAK WAS NOT RECENT. FITTING DAMAGE BEYOND USE. STRAP ALTHOUGH DUE
- [SDR ASI200501](https://openairdocs.org/sdr/ASI200501.md): Pin · failed · Jul 15, 2005 · N2767X · Bell UH1H · Main Rotor Head
  > DURING 1200 OVERHAUL OUTBOARD FITTING/STRAP PIN WAS FOUND BROKEN IN HALF. PIN HAD 1085.1 HOURS SINCE NEW. DISCOLORATION AND CONDITION OF BREAK INDICATES THE BREAK WAS NOT RECENT. FITTING DAMAGE BEYOND USE. STRAP ALTHOUGH DUE RETIREMENT HAS NO SIGNIFICANT DAMAG
- [SDR 2005FA0000785](https://openairdocs.org/sdr/2005FA0000785.md): Drive Shaft · vibration · May 11, 2005 · N53AG · Bell UH1H · Engine/Transmission Coupling
  > ( 2005-5-1) PILOT NOTICED VIBRATION AND RUMBLE COMING FROM THE MAIN TRANSMISSION AREA ON TAKEOFF. MECHANIC DID TROUBLE TROUBLESHOOTING PROCEDURES AND NOTICED ONE OF THE FLEX PLATES ON THE MAIN DRIVE SHAFT HAD SNAPPED CAUSING THE DRIVE SHAFT TO BE IN FAIL SAFE
- [SDR 2004FA0000333](https://openairdocs.org/sdr/2004FA0000333.md): Strap · cracked · Mar 25, 2004 · N667HP · Bell UH1H · Main Rotor Head
  > AIRCRAFT WAS EXPERIENCING VIBRATIONS DURING FLIGHT, MAINTENANCE WAS UNABLE TO REMOVE THE VIBRATION THROUGH TRACK AND BALANCE PROCEDURES. THE MAIN ROTOR ASSEMBLY WAS REMOVED FOR INSPECTION. DURING THE INSPECTION A TENSION-TORSION STRAP WAS FOUND CRACKED AT BOTH
- [SDR AGQA088876](https://openairdocs.org/sdr/AGQA088876.md): Pump · broken · Aug 12, 2003 · N53AG · Bell UH1H · Engine Oil Distribution (Airframe Furnished)
  > PUMP PRODUCING FLUXUATING OIL PRESSURE
- [SDR LS12003F00000](https://openairdocs.org/sdr/LS12003F00000.md): Skin · cracked · Jun 6, 2003 · N51AG · Bell UH1H · Rotorcraft Tail Boom
  > THE TAILBOOM FIRST 2 UPPER SKINS HAD NUMEROUS CRACKS. UNDER NORMAL OPERATIONS THESE CRACKS WOULD NEVER MATERIALIZE. THE AIRCRAFT HAS BEEN DOING LIFTING WORK. MUCH MORE THAN NORMAL OPERATIONS. THIS LOADS AND UNLOADS THE TAILBOOM NUMEROUS TIMES. THE RESULTI
- [SDR CDFROTW1](https://openairdocs.org/sdr/CDFROTW1.md): Battery · leaking · Apr 25, 2003 · N497DF · Bell UH1H · Emergency Locator Beacon
  > AT REMOVAL OF ELT BATTERY AT POSTED REMOVAL DATE IT WAS DISCOVERED THE BATTERY PACK HAD LEAKED AND CORRODED COMPONENTS WITHIN THE CASE. THERE WAS ALSO A CRACK NOTED ON THE BATTERY CASE WHICH APPEARS TO BE CAUSED BY OVER HEAT OR OVER PRESSURE. THE ELT IS CHEC
- [SDR AUS20021231](https://openairdocs.org/sdr/AUS20021231.md): Fitting · faulty · Oct 15, 2002 · Bell UH1H · Fuselage Main, Attach Fittings
  > (AUS) TAILBOOM LH LOWER ATTACHMENT FITTING ON FUSELAGE HAD OVERSIZE HOLES ALLOWING THE HILOK' PINS TO LOOSEN. SUSPECT CAUSED BY POOR REPAIR WORK.
- [SDR XVI2002F00000](https://openairdocs.org/sdr/XVI2002F00000.md): Frame · cracked · Apr 11, 2002 · N114DR · Bell UH1H · Rotorcraft Tail Boom
  > X-RAY INSPECTION REVEALED A CRACK IN THE FRAME FLANGE APPROXIMATELY.1250 INCH LONG CONTAINED BY ADJACENT FASTENER HOLE. THE CRACK IS LOCTED IN THE 3 OCLOCK POSITION, LOOKING FORWARD ON THE FRAME.
- [SDR LS1R074932](https://openairdocs.org/sdr/LS1R074932.md): Cylinder · worn · Jul 20, 2001 · N53AG · Bell UH1H · Hydraulic System, Main
  > PART IS WORN EXCESSIVELY.
- [SDR LS1R074916](https://openairdocs.org/sdr/LS1R074916.md): Battery · weak · Jul 20, 2001 · N51AG · Bell UH1H · Battery/Charger System
  > PART IS WEAK.
- [SDR LS1R072592](https://openairdocs.org/sdr/LS1R072592.md): Regulator · out of adj · Apr 16, 2001 · N53AG · Bell UH1H · AC Regulator
  > REGULATOR UNABLE TO HOLD ADJUSTMENT.
- [SDR LS1R072590](https://openairdocs.org/sdr/LS1R072590.md): Control Panel · inoperative · Apr 16, 2001 · N53AG · Bell UH1H · Flight Compartment Lighting
  > LIGHTS WILL NOT COME ON. CONTROL PANEL INOPERATIVE.
- [SDR LS1R072190](https://openairdocs.org/sdr/LS1R072190.md): Cable Drum · stretched · Apr 10, 2001 · N51AG · Bell UH1H · Flight Control System
  > CABLE DRUM STRETCHED.
- [SDR LS1R071917](https://openairdocs.org/sdr/LS1R071917.md): Shaft · worn · Apr 6, 2001 · N53AG · Bell UH1H · Tail Rotor Drive Shaft
  > PART IS WORN EXCESSIVELY.
- [SDR LS1R071916](https://openairdocs.org/sdr/LS1R071916.md): Shaft · worn · Apr 6, 2001 · N53AG · Bell UH1H · Tail Rotor Drive Shaft
  > PART IS WORN EXCESSIVELY.
- [SDR 20010502CW005](https://openairdocs.org/sdr/20010502CW005.md): Blade · cracked · Apr 2, 2001 · N340WN · Bell UH1H · Main Rotor Blades
  > A CRACK WAS NOTICED INSIDE DENT AFT OF THE SPAR ON THE TOP OF THE MAIN ROTOR BLADE. REMOVAL OF PAINT DETERMINED THE CRACK TO BE IN EXCESS OF 6 INCHES LONG. THE ROTOR BLADE WAS DETERMINED TO BE UNSERVICEABLE AND REMOVED FROM SERVICE.
- [SDR 20001017SH029](https://openairdocs.org/sdr/20001017SH029.md): Crosstube · cracked · Sep 19, 2000 · N6257P · Bell UH1H · Main Landing Gear Strut/Axle/Truck
  > DURING REFUEL, FOUND FORWARD CROSSTUBE AT RIGHT SADDLE CRACKED. POSSIBLE CAUSE, WEAR. (X)
- [SDR 20001017SH030](https://openairdocs.org/sdr/20001017SH030.md): Angle · cracked · Sep 1, 2000 · N6257P · Bell UH1H · Rotorcraft Tail Boom
  > FOUND ANGLE CRACKED AT LEFT LOWER TAILBOOM MOUNT. POSSIBLE CAUSE IS STRESS TORQUE OF TAILBOOM TO FUSELAGE. (X)
- [SDR LS1R066445](https://openairdocs.org/sdr/LS1R066445.md): Bearing · rough · Feb 29, 2000 · N51AG · Bell UH1H · Tail Rotor Drive Indicating System
  > BEARING EXTREMELY ROUGH, AND RATCHETY.
- [SDR LS1R066421](https://openairdocs.org/sdr/LS1R066421.md): Bearing · damaged · Feb 23, 2000 · N52AG · Bell UH1H · Tail Rotor Gearbox
  > BEARING SLINGING GREASE.
- [SDR LS1R066420](https://openairdocs.org/sdr/LS1R066420.md): Bearing · damaged · Feb 23, 2000 · N52AG · Bell UH1H · Tail Rotor Gearbox
  > BEARING SLINGING GREASE.
- [SDR LS1R066419](https://openairdocs.org/sdr/LS1R066419.md): Bearing · damaged · Feb 23, 2000 · N52AG · Bell UH1H · Tail Rotor Gearbox
  > BEARING SLINGING GREASE.
- [SDR LS1R066011](https://openairdocs.org/sdr/LS1R066011.md): Audio Panel · failed · Feb 17, 2000 · N52AG · Bell UH1H · Entertainment System
  > ICS BOX DOES NOT TRANSMIT.
- [SDR LS1R066010](https://openairdocs.org/sdr/LS1R066010.md): Audio Panel · failed · Feb 17, 2000 · N53AG · Bell UH1H · Entertainment System
  > ICS BOX DOES NOT TRANSMIT.
- [SDR LS1R065962](https://openairdocs.org/sdr/LS1R065962.md): Linear Actuator · inop · Feb 15, 2000 · N52AG · Bell UH1H · Engine Controls
  > LINEAR ACTUATOR IS INOPERATIVE.
- [SDR LS1R065943](https://openairdocs.org/sdr/LS1R065943.md): Volt Regulator · shorted · Feb 11, 2000 · N53AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR SHORTED OUT.
- [SDR LS1R065941](https://openairdocs.org/sdr/LS1R065941.md): Controller · failed · Feb 11, 2000 · N53AG · Bell UH1H · Interphone/Passenger Announcement (PA) System
  > INTERPHONE DOES NOT TRANSMIT.
- [SDR LS1R065936](https://openairdocs.org/sdr/LS1R065936.md): Volt Regulator · shorted · Feb 11, 2000 · N53AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR SHORTED OUT.
- [SDR AGQA065942](https://openairdocs.org/sdr/AGQA065942.md): Volt Regulator · inoperative · Feb 11, 2000 · N53AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR INOPERABLE. WILL NOT REGULATE.
- [SDR AGQA065935](https://openairdocs.org/sdr/AGQA065935.md): Volt Regulator · inoperative · Feb 11, 2000 · N53AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR INOPERABLE, WILL NOT REGULATE.

Next page: https://openairdocs.org/model/bell-uh-1h/reports.md?page=2

## 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 = 'UH1H'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/bell-uh-1h/reports

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